JP2015159943A - Foldable side rail - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foldable side rail having an enhanced safety upon using and storing, having an elevatable construction in which a pair of upper lateral members arranged in a lateral direction and a plurality of prop members arranged between common lower lateral members are rotatably jointed to construct a parallel linking mechanism so that the elevation is realized by an inter-connected mechanism in an inter connected manner.SOLUTION: In the present invention, an inter-connected arm 7 and an inter-connected link 8 constructing an inter-connected mechanism are rotatably jointed with a long hole 9 at the side of the inter-connected arm and an axis member 10 at the side of the inter-connected link engaged on the long hole 9 in a manner that the axis member 10 may slide in its longitudinal direction. The long hole is formed on a tip of the inter-connected arm in a manner that the long hole faces in a longitudinal direction in a standing condition of the prop members 2f.

Description

  The present invention relates to a foldable side rail used by being attached to a supine table such as a stretcher or a bed.

  A use state in which a plurality of support members are rotatably connected to form a parallel link mechanism between the upper cross member and the lower cross member, and the support member is raised to support the upper cross member in a high position. The folding side rail with a holding mechanism that holds the column member in an upright state can be used as a stretcher or the like. Widely used for beds.

  Many foldable side rails having such a configuration have been proposed in addition to Patent Document 1 and Patent Document 2, for example.

  On the other hand, in stretchers, beds, etc., tubes and cables may be connected between patients on the floor and external equipment, etc. It is hoped that you can pass through it. In contrast, conventionally, a pair of left and right side rails are configured so that cables or the like are passed between them, or a concave groove is formed in the main body of the side rail from above, and a cable or the like is formed in the concave groove. There are things that let you pass.

  Further, in the emergency or ICU bed described in Patent Document 3, four strut members are provided for each upper horizontal beam member between a pair of upper and lower horizontal beam members arranged in the left-right direction. The two linked strut members on the adjacent side connected to each upper side rail member are pivotally connected so as to constitute a parallel link mechanism, and projecting interlocking arms, and the tip ends of these interlocking arms, A foldable side rail is used in which a pair of left and right upper horizontal rail members can be moved up and down by an interlocking mechanism configured to be pivotally connected by an interlocking link so as to constitute a parallel link mechanism.

Japanese Patent No. 3029026 Japanese Patent No. 5137116 Design Registration No. 1203652

  Here, in the side rail having a configuration in which a pair of units are arranged on the left and right, the gap between the board and the gap between the units are important factors for safety. These gaps are, for example, JIS standards (JIS T 9254) stipulates that when a cylindrical object having a diameter of 12 cm is inserted with a force of 50 N, the cylindrical object does not enter or is 23.5 cm or more.

  Therefore, the foldable type that the left and right upper horizontal beam members supported by the plurality of support members on the lower horizontal beam member so as to configure the parallel link mechanism can be moved up and down by being interlocked by the interlocking mechanism that configures the parallel link mechanism. In the side rail, the interlocking mechanism needs to be configured such that the interval between the upper crosspiece members in the used state does not become wider than the set value.

  Further, in such a foldable side rail, the position of the rotation fulcrum may deviate from the parallelogram due to the manufacturing error of the members constituting the interlocking mechanism. When a gap S is generated between the members to be contacted, for example, as shown in FIG. 8 described later, between the contact member provided at the upper end of the support member and the adjacent support member to which the contact member contacts. This gap disappears when a downward force is applied, for example, when sitting on the upper crosspiece member, etc., so that such a force may cause the operator's fingers to be pinched. Sex also occurs.

Therefore, in a foldable side rail having an interlocking mechanism, it is necessary to prevent a gap from being generated between members that should be in contact with each other by the interlocking mechanism.
The present invention aims to solve such problems.

  In order to solve the above-described problems, in the present invention, a plurality of support members can be rotated so as to constitute a parallel link mechanism between a pair of upper horizontal members arranged in the left-right direction and a common lower horizontal member. Are connected to each upper horizontal crosspiece member, and at least one post member on the adjacent side is connected to each upper side crosspiece member, and the end of these interlocking arms is connected with an interlocking link so as to constitute a parallel link mechanism. In a foldable side rail having a holding mechanism that is rotatably connected and corresponds to one side of the pair of upper crosspiece members and holds the column member in an upright state, The interlocking link is configured to be rotatably connected by a long hole on the interlocking arm side and a shaft member on the interlocking link side engaged with the long hole so as to be movable only in the longitudinal direction. The column member stands up Oriented in the longitudinal direction in the state, we propose a foldable side rail formed on the distal end of the interlocking arm so as to face in the lateral direction in a state where the strut member has fallen.

  According to the present invention, there is proposed a foldable side rail in which, in the above-described configuration, at least one column member for projecting the interlocking arm is provided on each of the adjacent sides connected to each upper crosspiece member.

  The interlocking arm provided with the elongated hole is movable along the longitudinal direction of the elongated hole with respect to the shaft member provided in the interlocking link. However, since the elongated hole is oriented in the vertical direction when the column member is standing, the interlocking arm cannot move laterally with respect to the shaft member of the interlocking link in this state. Since the column member provided with the interlocking arm in which the long hole is formed in this way is maintained in an upright state where it cannot move in the lateral direction, the column member of the upper horizontal beam member not provided with the holding mechanism is provided with the holding mechanism. A predetermined positional relationship is maintained with respect to the support member of the upper horizontal cross member.

  Accordingly, the distance between the ends of the pair of upper crosspiece members is maintained at a predetermined distance, and safety is not hindered.

  When the holding mechanism provided on the upper horizontal beam member on one side is released, the column member connected to the upper horizontal beam member and the column member of the upper horizontal beam member not provided with the holding mechanism are also interlocked by the interlocking mechanism. The rotation can be lowered.

  In this way, when the strut member is pivoted down and falls down, the slot formed in the interlocking arm will turn in the horizontal direction, so the location of the slot in the interlocking arm will be on the shaft member of the interlocking link. On the other hand, it can move in the horizontal direction. That is, lateral play occurs.

  For this reason, it has the interlocking arm in which the long hole was formed even if the position of those rotation fulcrum shifts from the parallelogram due to the manufacturing error of the interlocking arm and the interlocking link. The column member is movable by the play and acts to eliminate the deviation from the parallelogram.

  For this reason, it can prevent that a clearance gap produces between the members which should be contact | abutted originally, for example, the contact member provided in the upper end of the support | pillar member, and the adjacent support | pillar member which this contact member contacts. Therefore, there is no danger of the operator's finger being caught due to the gap.

FIG. 1 is a perspective view showing an embodiment of a folding side rail according to the present invention in a use state. FIG. 2 is a partially enlarged side view showing an embodiment of the folding side rail according to the present invention in a use state. FIG. 3 is a partially enlarged side view showing an embodiment of a folding side rail according to the present invention in a retracted state. 4 is an enlarged side view of the main part of FIG. FIG. 5 is a side view illustrating the main part of FIG. 6 is an enlarged side view of the main part of FIG. FIG. 7 is an enlarged side view illustrating the main part of FIG. FIG. 8 is a side view showing an example of the inconvenience of the storage state that may occur when the long hole according to the present invention is not provided.

Next, embodiments of the present invention will be described with reference to the accompanying drawings.
In the figure, reference numerals 1 ul and 1 ur indicate a pair of upper horizontal beam members arranged in the left-right direction, and reference numeral 1 d indicates a common lower horizontal beam member. In the present invention, the column member 2 is rotatably connected so as to constitute a parallel link mechanism between the upper horizontal beam members 1ul and 1ur and the lower horizontal beam member 1d. In the drawing, reference numeral 3u indicates a rotation fulcrum between the column member 2 and the upper horizontal beam members 1ul and 1ur, and reference numeral 3d indicates a rotation fulcrum between the column member 2 and the lower horizontal beam member 1d. An abutting member 5 with an adjacent column member 2 is provided on the side of the fulcrum member 4 constituting the rotating fulcrum 3u in the direction of rotating and descending. The abutting position is the lowest position of the upper crosspiece members 1ul, 1ur.

  In the embodiment shown in the figure, four strut members 2 are connected to the upper horizontal crosspiece member 1ul on the left side and five upper crosspiece member 1ur on the right side. A holding mechanism 6 that holds the column member 2 in an upright state is provided between the right end side of the right upper horizontal cross member 1ur and the column member 2 on the right end side. The holding mechanism 6 can be appropriately configured, for example, as described in Patent Document 1 or Patent Document 2 described above.

  Next, in the present invention, at least one strut member 2 on the adjacent side connected to each upper horizontal beam member 1ul, 1ur, in this embodiment, on the adjacent side connected to each upper horizontal beam member 1ul, 1ur. Two interlocking arms 7 project from each other, and the tips of these four interlocking arms 7 are rotatably connected by interlocking links 8 so as to constitute a parallel link mechanism. In this embodiment, the interlocking arm 7 protrudes from the lower end of the column member 2 to the lower right in the figure. In the figure, the strut member protruding from the interlocking arm 7 and connected to the interlocking link 8 is designated by reference numeral 2f.

  Here, the tip of the interlocking arm 7 and the interlocking link 8 are an elongated hole 9 formed on the interlocking arm 7 side, and an interlocking link 8 side engaged with the elongated hole 9 so as to be movable only in the longitudinal direction. It is set as the structure connected with the shaft member 10 so that rotation is possible.

  As shown in FIGS. 2 and 3, etc., the elongated hole 9 is formed at the tip of the interlock arm 7 so that the column member 2f is oriented in the vertical direction when the column member 2f is upright and is oriented in the lateral direction when the column member 2f is tilted. Forming.

  In the above configuration, in the state where the column member 2 is held upright by the holding mechanism as shown in FIGS. 1, 2, 4, and 5, the elongated hole 9 faces in the vertical direction, In this state, the interlocking arm 7 cannot move laterally with respect to the shaft member 10 of the interlocking link 8.

  Accordingly, the column member 2f that is rotatably supported by the interlocking link 8 by the long hole 9 provided in the interlocking arm 7 is also maintained in an upright state in which it cannot move laterally. The 1 ul column member 2f is maintained in a predetermined positional relationship with the column member 2f of the upper horizontal rail member 1ur provided with the holding mechanism 6.

  For this reason, the space | interval between the edge part of a pair of upper side crosspiece members 1ul and 1ur is maintained by the predetermined space | interval, and safety is not inhibited.

  When the holding by the holding mechanism 6 provided on the upper horizontal beam member 1ur on the right side in the drawing is released, the column members 2 and 2f connected to the upper horizontal beam member 1ur and the upper horizontal beam member 1ul not provided with the holding mechanism 6 are connected. The support members 2 and 2f can also be rotated and lowered in conjunction with the interlocking mechanism by the interlocking arm 7 and the interlocking link 8.

  In this way, when the column member 2 is turned down and falls, as shown in FIGS. 3, 6, 7, and 8, the elongated hole 9 formed in the interlocking arm 7 is oblique, Since it faces in the lateral direction, the portion of the elongated hole 9 of the interlocking arm 7 can move in the lateral direction with respect to the shaft member 10 of the interlocking link 8. That is, lateral play occurs.

  For this reason, even if the position of the rotation fulcrum deviates from the parallelogram due to the manufacturing error of the members constituting the interlocking mechanism, that is, the interlocking arm 7 and the interlocking link 8, the interlocking in which the long hole 9 is formed. The column member 2f having the arm 7 can be moved by the play and acts to eliminate the deviation from the parallelogram.

  On the other hand, in FIG. 8, when the interlocking arm 7 and the interlocking link 8 are connected, play is generated in any direction with respect to the shaft member 10 on the interlocking link 8 side without providing a long hole on the interlocking arm 7 side. This shows an example of the inconvenience of the storage state that may occur in the case of providing a non-circular hole 11, and in this example, the position of the rotation fulcrum of each interlocking arm 7 and interlocking link 8 is a parallelogram. In the retracted state, a gap S is generated between the contact member 5 provided on the fulcrum member 4 at the upper end of the support member 2 and the adjacent support member 2 with which the contact member 5 contacts. ing.

  On the other hand, in the present invention, as described above, since the shift from the parallelogram in the interlocking mechanism is automatically eliminated, the contact member 5 provided on the fulcrum member 4 at the upper end of the column member 2 It is possible to prevent a gap S as shown in FIG. 8 from occurring between the adjacent strut member 2 with which the contact member 5 abuts. Therefore, there is no danger of the operator's finger being pinched due to the gap S.

  As described above, the foldable side rail of the present invention is configured to allow a tube, a cable, and the like to pass through a gap between a pair of left and right upper crosspiece members without using a high position, even in use. The gap in use can be kept at a safe interval, and at the time of storage, the gap is prevented from being generated due to a manufacturing deviation in the interlocking mechanism, and inconveniences such as pinching a finger. There is an effect that it does not occur, and the applicability to stretchers and ICU beds is great.

1 ul, 1 ur upper horizontal beam member 1 d lower horizontal beam member 2, 2 f column member 3 u, 3 d rotating fulcrum 4 fulcrum member 5 abutting member 6 holding mechanism 7 interlocking arm 8 interlocking link 9 slot 10 shaft member 11 round hole

Claims (2)

A plurality of support members are rotatably connected to form a parallel link mechanism between a pair of upper and lower horizontal beam members arranged in the left-right direction and a common lower horizontal beam member, and are connected to the respective upper horizontal beam members. The pair of upper horizontal rails are provided with an interlocking arm projecting on at least one column member on the adjacent side, and the distal ends of these interlocking arms being rotatably connected by an interlocking link so as to form a parallel link mechanism. Corresponding to one side of the member, in the folding side rail of the configuration provided with a holding mechanism that holds the column member in an upright state, the tip of the interlocking arm and the interlocking link are an elongated hole on the interlocking arm side, The elongated hole is configured to be rotatably connected by a shaft member on the interlocking link side that is movably engaged only in the longitudinal direction thereof, and the elongated hole is oriented in the longitudinal direction in a standing state, The column member collapsed Folding side rails, characterized in that formed at the tip of the interlock arm so as to face in the lateral direction in the state. The foldable side rail according to claim 1, wherein the supporting column members for projecting the interlocking arms are at least one on each of the adjacent sides connected to each upper crosspiece member.

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