JP5001795B2 - Fence and lock mechanism for hospital transport stretchers - Google Patents

Description

  The present invention relates to a fall prevention fence provided on a patient transport stretcher or bed used in medical facilities such as hospitals and nursing care facilities, and in particular, by rotating the fence and retracting it below the bed surface. The present invention relates to a fence such as a hospital transport stretcher that can allow a patient to transfer to a bed surface and a locking mechanism thereof.

  Stretcher fences used in hospitals and nursing homes are located on the side edge of the bed to prevent patients lying on the bed of the stretcher from falling from the bed. It is installed to stand up from the edge.

  In addition, when the fence stands on the side edge of the bed of the stretcher, when the patient moves from the stretcher to a wheelchair or other chair, the fence is removed from the bed, or By folding the fence in the longitudinal direction of the bed (Patent Document 1) or rotating the fence around the direction parallel to the side edge of the bed part as the axis of rotation, and hanging the fence downward from the bed surface, Must be retracted from the side edge.

  In patent document 1, the horizontal frame which comprises a fence is supported by the upper end part of a some support | pillar, the horizontal frame and the upper end part of a support | pillar can be rotated, and when all the support | pillars fall down, a horizontal frame Is descending in a horizontal state. When the fence is held upright, the pin member elastically supported by the lower end portion of the stopper provided on the horizontal frame so as to be movable up and down is placed in the fitting hole of the receiving member provided at the upper end portion of the support column. Inserted from above, the stopper of the horizontal frame is restrained by the receiving member of the column, and the horizontal frame and the column are locked so that they do not rotate relatively so that the column does not fall down. The stopper is restrained from moving upward by aligning the protrusion provided on the lower surface of the double stopper, which is provided horizontally with respect to the horizontal frame, with the protrusion provided on the upper surface of the stopper. Thus, the mutual restraint state between the stopper and the receiving member is not released. In addition, when the operator moves the double stopper horizontally, the stopper restraint (contact between the protrusions) by the double stopper is released, and the stopper can be moved upward. Accordingly, the stopper pin member is The horizontal frame can be rotated relative to the support column by being detached from the fitting hole of the receiving member. Thereby, a support | pillar can fall down, and when all the support | pillars fall down, a horizontal frame will fall horizontally and a fence will be folded.

  However, since the fence of the stretcher described in Patent Document 1 is of a type in which a plurality of support columns are tilted to lower the horizontal frame and fold the support columns, even in the folded state, It remains at a slight height on the side edge and becomes an obstacle when the patient is transferred from the stretcher.

  On the other hand, if the fence is rotated around the rotation axis parallel to the side edge of the stretcher and is hung from the rotation axis during transfer, the fence will be in the way when the patient transfers from the stretcher to a wheelchair. Never become.

  9 and 10 are diagrams showing a rotating type fence. FIG. 9 shows a state in which the fence stands on the side edge of the stretcher and is used as a fence, and FIG. 10 shows an operation state in which the fence is rotated. Show. On the side edge of the bed portion 1 of the stretcher, the rotary shaft support portion 3 is fixedly disposed with its posture horizontal. At the right end of the fence 2, the rotation shaft 4 is provided so as to protrude from the fence 2 with its longitudinal direction horizontal, and the rotation shaft 4 is inserted into the horizontal hole of the rotation shaft support portion 3, The fence 2 is supported by the rotary shaft support portion 3 so as to be rotatable around a horizontal axis. A concave portion 6 is formed in the rotating shaft support portion 3, and a protrusion 5 is provided at the right end portion of the fence 2. The fence 2 has an end (left end) opposite to the rotation shaft support 3 supported by a similar rotation shaft support so as to be rotatable about a horizontal axis, and a compression spring (not shown). The fence 2 is urged to the right.

  For this reason, as shown in FIG. 9, in a state where the protrusion 5 is fitted in the recess 6, the fence 2 does not rotate and maintains an upright state. On the other hand, when the fence 2 is rotated and retracted, as shown in FIG. 10, the fence 2 is slid to the other end (left end) side against the urging force of the compression spring, and the protrusion 5 is moved. Separate from the recess 6. In this state, by turning the fence 2 forward and hanging downward from the rotary shaft support part 3, the fence 2 moves downward from the bed part 1 and the patient can be transferred.

Patent No. 3029026

  However, in the prior art shown in FIG. 9 and FIG. 10 described above, since the fence 2 can be rotated only by sliding the fence 2 to the left in the figure, the patient or caregiver causes a malfunction. There is a fear.

  The present invention has been made in view of such problems, and provides a fence such as a hospital transport stretcher and the like and a locking mechanism thereof that can be reliably executed without erroneous operation of raising and retracting the fence. Objective.

A fence such as a stretcher for hospital transportation according to the present invention is a fence provided along a side edge of a bed part, and a fence body provided with rotation axes at both ends, and the fence body via the rotation shaft A rotation support portion that rotatably supports the first engagement portion provided on the fence body, a second engagement portion provided on the rotation support portion and engageable with the first engagement portion, And the second engagement portion includes a first hole or notch provided in at least a part of an upper end portion in the standing direction in the standing state of the fence body, and a standing direction in the standing state of the fence body. At least a part of the position rotated by 90 ° about the rotation axis with respect to the upper end portion, provided at a position not rotated by 90 ° about the rotation axis with respect to the first hole or notch. A second hole or notch, and the first engaging portion is formed on the fence body. A fixed base, a lever provided so as to be able to reciprocate in one direction with respect to the base, and movement of the lever provided in the lever into the first hole or notch and the second hole or notch . A pin member that enters and is detachable from the first hole or notch and the second hole or notch and is reciprocally movable in a direction intersecting the one direction; A locking member that prevents movement in a direction away from the second engagement portion and allows movement of the lever in a direction away from the second engagement portion in a second position, and the standing state of the fence body The pin member enters into the first hole or notch, and the pin member enters into the second hole or notch in a horizontal state of the fence body .

  Other fences such as a hospital transport stretcher according to the present invention, the fence provided along the side edge of the bed part, the fence body provided with a rotation shaft at both ends, and the rotation shaft A rotation support portion that rotatably supports the fence body, a first engagement portion provided on the fence body, and a second engagement portion provided on the rotation support portion and engageable with the first engagement portion. The second engagement portion has a hole or a notch, and the first engagement portion is reciprocally movable in one direction with respect to the base portion fixed to the fence body and the base portion. A lever provided on the lever, and a pin member which enters the hole or notch by the movement of the lever and is removable from the hole or notch, and is provided so as to be reciprocally movable in a direction intersecting the one direction. The movement of the lever in the direction away from the second engagement portion at the position of A locking member that allows movement of the lever in a direction away from the second engagement portion, and a locking protrusion formed on the fence body, wherein the first engagement portion is the engagement member. When the stop member is located at the first position, the locking protrusion locks the locking member so as not to move away from the rotating shaft, and the lever moves away from the rotating shaft. The pin member enters into the hole or the notch in a standing state of the fence body.

  Moreover, it is preferable that it has an elastic member which urges | biases the said pin member toward the said 2nd engaging part.

The locking mechanism of the fence such as a hospital transport stretcher according to the present invention is provided along the side edge of the bed part, the fence main body provided with the rotation shaft at both ends, and the fence main body via the rotation shaft. In a lock mechanism for a fence such as a hospital transport stretcher having a rotation support portion that rotatably supports the first engagement portion provided in the fence body, and the first support portion provided in the rotation support portion. A second engaging portion engageable with the engaging portion, wherein the second engaging portion is provided on at least a part of an upper end portion in the standing direction in the standing state of the fence body. A hole or notch, and at least part of a portion rotated by 90 ° about the rotation axis with respect to the upper end portion in the standing direction in the standing state of the fence body, and the first hole or notch It is provided at a position that is not 90 ° rotated about the rotation axis. A second hole or notch, and the first engaging portion includes a base fixed to the fence body, a lever provided so as to reciprocate in one direction with respect to the base, said first hole or notch and the second hole or enters the cutout also the first hole or cutout and the second hole or the pin member detachably from the notch by the movement of the lever is provided on the lever , Provided so as to be reciprocally movable in a direction crossing the one direction, preventing movement of the lever in a direction away from the second engagement portion at a first position, and preventing the second engagement of the lever at a second position. A locking member that allows movement in a direction away from the joint portion, and the pin member enters the first hole or notch in the standing state of the fence body, and the horizontal state of the fence body pin member and characterized in that entering the second hole or cutout That. Further, the fence locking mechanism such as another hospital transport stretcher according to the present invention is provided along the side edge of the bed part, and the fence main body provided with the rotation shaft at both ends, and the rotation shaft. In the lock mechanism of the fence such as a hospital transport stretcher having a rotation support part that rotatably supports the fence body, the first engagement part provided in the fence body and the rotation support part are provided. And a second engagement portion that is engageable with the first engagement portion, the second engagement portion has a hole or a notch, and the first engagement portion is fixed to the fence body. And a lever member that is reciprocally movable in one direction with respect to the base portion, and a pin member that is provided on the lever and enters the hole or notch by the movement of the lever and can be removed from the hole or notch And a first position that is reciprocally movable in a direction intersecting the one direction. A locking member that prevents movement of the lever in a direction away from the second engagement portion and allows movement of the lever in a direction away from the second engagement portion at a second position; A locking projection formed, and the first engagement portion is configured such that when the locking member is located at the first position, the locking projection causes the locking member to move the locking member from the rotation shaft. Locking so as not to move away, restraining the lever from moving away from the rotating shaft, and the pin member entering into the hole or notch when the fence body is standing. To do.

  According to the present invention, in the standing state of the fence body, the pin member of the first engagement portion enters the hole or notch of the second engagement portion, and the first engagement portion and the second engagement portion Are engaged and mutually restrained, so that the fence main body maintains a standing state at the side edge of the bed portion.

  Further, when the fence body is rotated and retracted downward, for example, when the locking member is moved in the lateral direction (direction intersecting one direction) and positioned at the second position, the lever upward (one The pin member provided on the lever comes out of the hole or notch, the first engagement portion and the second engagement portion are disengaged, and the fence body is the rotation shaft. It can be rotated around. Thereby, a fence main body can be brought down and can be made to evacuate from a bed part.

  In the present invention, since the fence body can be rotated by moving the locking member in the lateral direction and then moving the lever upward, the caregiver or the patient accidentally makes the first and second engagements. Even if it touches the part, the fence body does not rotate by itself, and the rotation of the fence body due to an erroneous operation can be prevented.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings. 1 to 3 are perspective views showing a stretcher having a fence according to an embodiment of the present invention. The stretcher 10 is installed such that a horizontal bed 11 can be moved up and down by a lifting device 15, and can be moved in any direction by wheels 14 arranged at four corners of the bed 11. It has become. A fence 20 is installed on the side edge of the bed portion 11 of the stretcher 10. The fence 20 is installed in the vicinity of the side wall 21 of the bed body 11 of the stretcher 10 and the fence main body 21 provided with rotating shafts 22 and 23 extending in the longitudinal direction at both ends. Rotation support portions 12 and 13 that support and rotatably support the fence body 21 are provided. And the lock mechanism 30 which consists of a 1st engaging part and a 2nd engaging part is installed in the rotating shaft 22 and the rotation support part 12 side of one edge part of the fence main body 21. As shown in FIG. As shown in FIG. 4, the rotation shaft 23 at the other end of the fence body 21 is inserted in a horizontal hole parallel to the bed portion longitudinal direction provided in the rotation support portion 13. It is possible to move in the axial direction (longitudinal direction) within the rotation support part 13, and thereby the fence body 21 can be slightly slid in the longitudinal direction of the bed part 11. . As will be described later, the rotary shaft 22 on one end side is also inserted into the horizontal hole in the rotary support portion 12 and can move in the longitudinal direction of the rotary shaft 22 in the rotary support portion 12. ing. A compression spring 16 is externally fitted to the rotation shaft 23 on the other end side, and the fence body 21 is urged toward one end side (rotation support portion 12 side) by the compression spring 16. It has become so.

  A lock mechanism 30 is provided on the rotation support portion 12 side. The lock mechanism 30 causes the fence main body 21 to stand in the standing state shown in FIG. 1, the horizontal state shown in FIG. 2, and the rotation shaft shown in FIG. It is possible to maintain a retracted state that hangs down. The standing state shown in FIG. 1 functions as a side fence for preventing a patient from falling of a stretcher for transporting a patient used in a hospital, medical facility, nursing facility, or the like. Moreover, the horizontal state shown in FIG. 2 functions as an upper extremity table used for drip infusion, treatment, and the like in an examination table and a transport stretcher. Further, the retracted state shown in FIG. 3 is a mode in which the fence is retracted so as not to get in the way when the patient on the bed moves to a wheelchair or the like. Such three kinds of states are fixed to the state by the lock mechanism 30. The lock mechanism 30 includes a first engagement portion 31 provided on the fence body 21 and a second engagement portion 32 provided on the rotation support portion 12.

  5 and 6 are views showing the structure of the lock mechanism 30 when the fence is in an upright state, in which (a) is a perspective view and (b) is a front view. FIG. 7 is a perspective view showing a state in which a part of the lock mechanism 30 is disassembled. Furthermore, FIG. 8 is a figure which shows the structure of the locking mechanism 30 when a fence is in a horizontal state, (a) is a perspective view, (b) is a top view. A base portion 41 of the first engagement portion 31 is fixed to the attachment portion 24 provided at one end portion of the fence main body 21. A lever 42 is fitted on the base 41, and the lever 42 moves up and down slightly along the base 41. And in this base 41, the hole extended in the up-down direction in FIG. 5 thru | or FIG. 7 is provided in the center part, and the pin member 43 is arrange | positioned in this hole. The hole of the base 41 extends in a direction perpendicular to the center line of the rotating shaft 22, and the pin member 43 also has the hole so that its longitudinal direction is perpendicular to the center line of the rotating shaft 22. It is accommodated in the inside so as to be movable in the longitudinal direction. A flange 48 is formed in the middle of the pin member 43, and a compression coil spring 45 is fitted on the pin member 43 in the hole of the base 41. The compression coil spring 45 is interposed between the flange 48 of the pin member 43 and the upper end of the hole of the base portion 41, and biases the pin member 43 in a direction protruding from the base portion 41 toward the rotating shaft 22 side. ing. The pin member 43 is fixed to the lever 42. For example, a hole can be formed in the lever 42, and the pin member 43 can be fixed by a spring pin through the hole.

  A concave portion 50 is formed in the lever 42, and a locking member 44 is fitted into the concave portion 50 in a direction parallel to the rotation shaft 22. The locking member 44 can reciprocate in the direction parallel to the rotation shaft 22 in the recess 50, and the portion of the locking member 44 on the mounting portion 24 side extends toward the mounting portion 24. It is the extension part 46 which comes out. Further, the mounting portion 24 is formed with a locking projection 47 at a portion facing the lever 42, and as shown in FIG. 5, the locking member 44 is closest to the mounting portion 24 (first position). When the upper end edge of the extending portion 46 is locked to the lower end edge of the locking protrusion 47 when the extension member 46 is positioned, the locking member 44 and the lever 42 fitted with the locking member 44 move away from the rotary shaft 22. It is prevented from moving upward (in the illustrated example).

  On the other hand, the rotation support portion 12 is provided with a second engagement portion 32. The second engagement portion 32 has a cylindrical cylindrical portion 51 fixed to the rotation support portion 12. A hole 52 (see FIG. 8) into which the pin member 43 is inserted is formed in the center of the upper end portion of the cylindrical portion 51 in the width direction, and the pin member 43 is located on the circumferential line passing through the hole 52. It becomes the sliding part 53 in which the front-end | tip part slides. Note that the tip portion of the pin member 43 is coated with a substance that reduces sliding resistance (for example, Teflon (registered trademark)), but due to local wear of the cylindrical portion 51 due to sliding of the pin member 43. In order to prevent the formation of the groove, the sliding portion 53 is formed so as to be slightly raised from the other portions. In addition, the cylindrical portion 51 has a position rotated 90 ° toward the hole 52 by a central angle with respect to the center of the rotation shaft 22 with respect to the hole 52, and is notched in the portion of the cylindrical portion 51 on the side of the fence body 21. 54 is formed (see FIGS. 5 and 6).

  Next, the operation of the fence such as the stretcher of the present embodiment configured as described above will be described. As shown in FIG. 5, the locking member 44 is located at the position (first position) closest to the mounting portion 24 of the fence main body 21 in a state where the fence main body 21 is upright. The protruding portion 46 is locked by a locking protrusion 47 formed on the mounting portion 24 and cannot move in a direction away from the rotating shaft 22. Therefore, the lever 42 cannot move in the direction away from the rotary shaft 22. For this reason, the pin member 43 provided on the lever 42 is inserted into the upper end hole 52 (FIG. 8) of the cylindrical portion 51 of the second engagement portion 32. Thereby, the fence main body 21 maintains an upright state by the pin member 43 by the side of the fence main body 21 being inserted in the hole 52 of the cylindrical part 51 by the side of the rotation support part 12. The inserted state of the pin member 43 into the hole 52 cannot be removed without the movement of the lever 42 and the movement of the locking member 44. Therefore, the pin member 43 is double-locked. Thus, the fence body is reliably prevented from rotating.

  Further, since the compression coil spring 45 urges the pin member 43 toward the center line side of the rotation shaft 22, when the fence body 21 is raised to the standing state shown in FIG. When the tip slides on the sliding portion 53 and approaches the hole 52 and further aligns with the hole 52, the pin member 43 is reliably inserted into the hole 52 by the urging force of the compression coil spring 45. At this time, the operator does not need to lift the lever 42 away from the rotating shaft 22. Therefore, the fence main body 21 is reliably held in an upright state only by raising the fence main body 21.

  On the other hand, when the fence main body 21 is desired to be in the retracted state shown in FIG. 3, the locking member 44 is moved away from the attachment portion 24 as shown in FIG. 6. As a result, the extended portion 46 of the locking member 44 is released from the locked state by the locking projection 47, so that the lever 42 is moved upward relative to the base portion 41. Accordingly, the pin member 43 provided on the lever 42 is detached from the inside of the hole 52 of the cylindrical portion 51, and the base portion 41 can move relative to the cylindrical portion 51. Thereafter, the lever 42 is released and the fence body 21 is rotated. Therefore, the fence main body 21 to which the base 41 is fixed can be rotated with respect to the rotation support part 12 to which the cylindrical part 51 is fixed, and the fence main body 21 is rotated to the retracted state shown in FIG. be able to.

  On the other hand, when it is desired to fix the fence body 21 in the horizontal state and function as the upper limbs, the locking member 44 is moved to the second position side, and the locking projection 47 of the extending portion 46 of the locking member 44 is used. Release the locked state. Next, the lever 42 is lifted upward, the pin member 43 is detached from the hole 52, and the restriction of the fence body 21 by the rotation support portion 12 is released. Next, as shown in FIG. 8, the fence body 21 is pushed away from the rotation support portion 12, that is, toward the rotation support portion 13 on the other end side. Since the fence main body 21 itself is urged toward the rotation support part 12 by the compression coil spring 16, by pushing the fence main body 21 against this urging force, as shown in FIG. And the cylindrical portion 51 are shifted in the longitudinal direction of the rotating shaft 22, and the tip of the pin member 43 in the base portion 41 slides on the portion of the cylindrical portion 51 on the side of the fence body 21. become. For this reason, when the fence main body 21 has rotated to the horizontal state, the pin member 43 enters the notch 54 of the cylindrical portion 51 by the urging force of the compression coil spring 45. In this state, the lever 42 and the locking member 44 are prevented from moving, so that the lock main body 21 is reliably held in a horizontal state without being unlocked by an erroneous operation.

  Also in this case, the lock can be released by first moving the locking member 44 in a direction away from the mounting portion 24 and then moving the lever 42 in a direction away from the rotary shaft 22.

  As is clear from the above description, when the fence main body 21 is moved from the standing state to the retracted state, the locking member 44 is moved, the lever 42 is moved upward, and the pin member 43 is detached from the hole 52. It is possible to rotate the fence main body 21 all at once to the retracted state of the lower end portion. That is, it is possible to move the fence main body 21 to the retracted state of the lower end by simply rotating the fence main body 21 without stopping the fence main body 21 in the horizontal state.

  Further, when it is desired to fix the fence main body 21 in the horizontal state, the fence main body is directed to the other end side in a state where the locking member 44 is moved away from the mounting portion 24 and the lever 42 is moved upward. If the fence main body 21 is then rotated simply by pressing, the fence can be installed in a horizontal state and function as an upper limbs.

  Note that the compression coil spring 45 in the above-described embodiment is not necessarily required. However, by providing the compression coil spring 45, the pin member 43 is reliably inserted into the hole 52 or the notch 54.

  Note that the fence with the lock mechanism is not necessarily provided on both side edges of the bed portion, and may be provided only on the side edge side used for transfer by the patient. Moreover, it is not always necessary to provide the fence itself on both side edges of the bed portion.

  Further, in the above embodiment, the second engaging portion has the hole 52 in the center in the width direction of the cylindrical portion 51 and the notch 54 at the position on the mounting portion 24 side of the cylindrical portion 51. Instead, a notch can be provided at a position on the opposite side of the mounting portion 24 of the cylindrical portion 51, and a hole can be provided instead of the notch 54.

It is a perspective view which shows the stretcher provided with the fence which concerns on embodiment of this invention, and is a perspective view which shows the state in which the fence stood up. It is a perspective view which shows the stretcher provided with the fence which concerns on embodiment of this invention, and is a perspective view which shows the state in which a fence is in a horizontal state. It is a perspective view which shows the stretcher provided with the fence which concerns on embodiment of this invention, and is a perspective view which shows the state which the fence retreated below. Similarly, it is a perspective view which shows the edge part on the opposite side of a fence. It is a figure which shows the structure (locking state) of the locking mechanism 30 when a fence is in a standing state, (a) is a perspective view, (b) is a front view. It is a figure which shows the structure (lock release state) of the lock mechanism 30 when a fence is in the standing state, (a) is a perspective view, (b) is a front view. It is a perspective view which shows the state which decomposed | disassembled some lock mechanisms 30. FIG. It is a figure which shows the structure of the locking mechanism 30 when a fence is in a horizontal state, (a) is a perspective view, (b) is a top view. It is a perspective view which shows the conventional lock mechanism (locked state). It is a perspective view which shows the conventional lock mechanism (lock release state).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bedding part 2 Fence 3 Support part 4 Rotating shaft 5 Protrusion 6 Recessed part 10 Stretcher 11 Bedding part 12, 13 Rotating support part 14 Wheel 15 Lifting device 16 Compression coil spring 20 Fence 21 Fence main body 22, 23 Rotating axis 24 Attachment part 30 Lock Mechanism 31 First engaging portion 32 Second engaging portion 41 Base portion 42 Lever 43 Pin member 44 Locking member 45 Coil spring 46 Extension portion 47 Locking protrusion 48 Flange 50 Recessed portion 51 Cylindrical portion 52 Hole 53 Sliding portion 54 Notch

Claims (5)

In the fence provided along the side edge of the bed part, the fence main body provided with the rotation shaft at both ends, the rotation support part for rotatably supporting the fence main body via the rotation shaft, and the fence main body A first engagement portion provided on the rotation support portion, and a second engagement portion that is engageable with the first engagement portion. The second engagement portion is provided on the fence. The first hole or notch provided in at least a part of the upper end portion in the standing direction in the standing state of the main body and the upper end portion in the standing direction in the standing state of the fence main body rotated 90 ° about the rotation axis. A second hole or notch provided at a position which is at least a part of the position portion and is not rotated by 90 ° about the rotation axis with respect to the first hole or notch, and The first engagement portion is reciprocated in one direction with respect to the base portion fixed to the fence body and the base portion. A lever provided movably, and the lever provided in the lever moves into the first hole or notch and the second hole or notch, and the first hole or notch and the second hole by the movement of the lever . A pin member detachable from the hole or notch, and provided so as to be reciprocally movable in a direction intersecting the one direction, and prevents movement of the lever in a direction away from the second engaging portion at a first position; A locking member that allows movement of the lever in a direction away from the second engagement portion at the position of the pin, and the pin member enters into the first hole or notch in the standing state of the fence body In addition, in the horizontal state of the fence body, the pin member enters the second hole or notch, and the fence such as a hospital transport stretcher. In the fence provided along the side edge of the bed part, the fence main body provided with the rotation shaft at both ends, the rotation support part for rotatably supporting the fence main body via the rotation shaft, and the fence main body A first engagement portion provided in the rotation support portion and a second engagement portion provided in the rotation support portion and engageable with the first engagement portion, wherein the second engagement portion is a hole or a notch. The first engagement portion includes a base fixed to the fence body, a lever provided so as to be reciprocable in one direction with respect to the base, and a movement of the lever provided on the lever. A pin member that enters the hole or notch and is detachable from the hole or notch, and is reciprocally movable in a direction intersecting the one direction, and is separated from the second engaging portion of the lever at a first position. In a direction away from the second engagement portion of the lever at the second position. Includes a locking member to allow a locking projection formed on the fence body, the a, the first engagement portion, when the locking member is located at the first position, the locking A stop projection locks the locking member so as not to move away from the rotating shaft, and restrains the lever from moving in a direction away from the rotating shaft. A fence, such as a hospital transport stretcher, which enters the hole or notch. The fence such as a stretcher for hospital transportation according to claim 1 or 2 , further comprising an elastic member that urges the pin member toward the second engaging portion. A hospital transport strut having a fence main body provided along the side edge of the bed and having rotation shafts at both ends, and a rotation support portion for rotatably supporting the fence main body via the rotation shaft. A locking mechanism for a fence such as a letcher has a first engagement part provided on the fence body and a second engagement part provided on the rotation support part and engageable with the first engagement part. The second engaging portion includes a first hole or notch provided in at least a part of an upper end portion in the standing direction in the standing state of the fence body, and an upper end portion in the standing direction in the standing state of the fence body. And at least a part of a portion rotated by 90 ° about the rotation axis, and provided at a position not rotated by 90 ° about the rotation axis with respect to the first hole or notch. 2 holes or notches , wherein the first engaging portion is the fence body. A base fixed to the base, a lever provided so as to be capable of reciprocating in one direction relative to the base, and the first hole or notch and the second hole or notch provided by movement of the lever provided on the lever. And a pin member detachable from the first hole or notch and the second hole or notch , and reciprocally movable in a direction intersecting the one direction, the lever of the lever at a first position. A locking member that prevents movement in a direction away from the second engagement portion and allows movement of the lever in a direction away from the second engagement portion at a second position, The stretcher for hospital transportation characterized in that the pin member enters into the first hole or notch in a state, and the pin member enters into the second hole or notch in a horizontal state of the fence body. Etc. Rail lock mechanism. A hospital transport strut having a fence main body provided along the side edge of the bed and having rotation shafts at both ends, and a rotation support portion for rotatably supporting the fence main body via the rotation shaft. A locking mechanism for a fence such as a letcher has a first engagement part provided on the fence body and a second engagement part provided on the rotation support part and engageable with the first engagement part. The second engaging portion has a hole or a notch, and the first engaging portion has a base fixed to the fence body and a lever provided so as to reciprocate in one direction with respect to the base. And a pin member that is provided on the lever and moves into the hole or notch by the movement of the lever and is detachable from the hole or notch, and is provided to be able to reciprocate in a direction intersecting the one direction at a first position A second position for preventing movement of the lever in a direction away from the second engaging portion; A locking member that allows movement in a direction away from the second engagement portion of the lever, anda locking projection formed on the fence body, the first engagement portion, the locking When the member is located at the first position, the locking projection locks the locking member so as not to move away from the rotating shaft, and the lever does not move away from the rotating shaft. A locking mechanism for a fence such as a hospital transport stretcher, wherein the pin member enters the hole or the notch when the fence body is standing upright.

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