JPH10144U - Locking mechanism for folding side fence - Google Patents

Abstract

(57) [Problem] To provide a lock mechanism for a foldable side fence provided on a bed, the structure of which can be easily and securely folded, and a mechanism capable of safely and reliably locking and unlocking. SOLUTION: A horizontal fitting hole 24 is provided in a side surface of an end member 13a provided at an upper end of a vertical rod 13A at an end of a side fence 1 in a direction opposite to a bending direction thereof, and a stopper member at an end of an upper horizontal rod 11 side. 3
0, one end of a lever 25 is rotatably mounted on a shaft, and the tip of a rotating arm 26 rotatably connected to the other end is turned around a fitting member 27 provided in the upper horizontal rod 11 so as to be movable in the horizontal direction. It is movably connected, and the protrusion 28 provided at the end thereof is
The end flap 13A is resiliently fitted into the fitting hole 24 of the end member 13a to prevent the vertical rod 13A from rotating and hold the side fence 1 in the upright state.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a locking mechanism for a foldable side fence provided in a patient bed used in a hospital or home.

[0002]

[Prior art]

 Side fences provided on such a bed are provided for the purpose of preventing a patient lying down on the bed and falling from the bed or falling of the bedding. In this case, when the patient gets off the couch, it is folded so that it can be folded down so that it is not in the way. A typical example of this type of foldable side fence is disclosed in Japanese Utility Model Publication No. 2-16688.

The conventional side fence is provided on a side frame 101 of a bed, for example, as shown in FIG. The side fence 100 is provided with horizontal members 102 and 103 which are vertically parallel to each other. A plurality of mounting members 104 are provided on inner surfaces of the upper and lower horizontal members 102 and 103 facing each other at predetermined intervals, respectively. A plurality of vertical rods 106 having upper and lower ends pivotally attached to a support shaft 105 are provided in parallel on the mounting member 104. As shown in FIG. 10, the mounting member 104 pivotally connecting the end of the vertical rod 106 is formed in a shape in which the horizontal surface and one side surface are open. The mounting members 104 provided on each of the upper and lower horizontal members 102 and 103 are provided with their open side faces facing in opposite directions to each other, so that they can turn only in the illustrated one direction and fall down. . The side fence 100 can be held upright by a lock mechanism 110 provided between the vertical bar 106a and the upper horizontal member 102 located at the end.

The lock mechanism 110 is, for example, one disclosed in Japanese Utility Model Laid-Open No. 4-89053. As shown in FIG. 11, the lock mechanism 110 has a receiving member 111 attached to the vertical rod 106a located at an end of the side fence 100, and an upward fitting hole 112 provided in the receiving member 111. A downwardly projecting portion 116 of a movable lever fitting member 115 movably provided in a cover member 113 which is attached to an end portion of the shaft 102 and which has a vertical shaft 106 pivotally mounted on a support shaft 105 and also serves as an attaching member, A substantially U-shaped leaf spring 114 is provided so as to resiliently fit into the fitting hole 112 of the receiving member 111 from a substantially vertical direction.

When the downwardly protruding portion 116 of the movable lever fitting member 115 of the lock mechanism 110 is fitted into the upwardly fitting hole 112 of the receiving member 111, the rotation of the vertical bar 106 a is prevented. As a result, the side fence 100 is held in an upright state as shown by a solid line in FIG. When the movable lever fitting member 115 is gripped in this state, the fitting between the downwardly protruding portion 116 and the fitting hole 112 of the receiving member 111 is released, and the vertical rod 106a becomes rotatable. Can be folded in a lying state as shown by imaginary lines in FIG.

However, in the case of the lock mechanism 110 in the conventional folding side fence 100 as described above, the lock mechanism 110 is locked by fitting the downward projection 116 and the receiving hole 111 of the receiving member 111 in a substantially vertical direction. Therefore, even if the downward projection 116 is not completely disengaged from the fitting hole 112 just by putting a hand on the movable lever fitting member 115, the vertical rod 106a is rotated, the lock is released, and the side fence 100 is released. There was a risk of falling. Therefore, for example, as disclosed in the above-mentioned Japanese Patent Publication No. 2-16688, there is a type in which a double lock mechanism is provided. However, such a double lock mechanism only complicates the structure. In addition, the usual operation of folding the side fence becomes troublesome.

In view of the above points, the present invention provides a lock mechanism for a folding side fence provided on a bed or the like, in which the structure and the operation of folding are simple, and the locking and unlocking is performed safely and securely. It is intended to provide a possible foldable side fence locking mechanism.

[0008]

[Means for Solving the Problems]

 The lock mechanism of the foldable side fence according to the present invention has a plurality of vertical bars provided on the side frame of the bed so as to be able to fold up and down, and the upper horizontal bar is pivotally attached to the upper end of the vertical bar to be freely foldable. In the foldable side fence, the upper end of the vertical rod is bent into a substantially L shape, the bent end portion is pivotally connected to the upper horizontal rod, and the vertical rod is positioned at the end of the side fence. A lever provided with a substantially horizontal fitting hole in a side surface of the bent upper end portion in a direction opposite to a bending direction of the bent upper end portion, and one end rotatably provided in a side end portion of the upper horizontal rod. The tip of a rotating arm rotatably connected to the other end of the connecting member is connected to a fitting member provided to be movable in a substantially horizontal direction within the upper horizontal rod, and a projection provided at the tip of the fitting member. The above object is achieved by resiliently fitting into a substantially horizontal fitting hole provided at the bent upper end of the vertical rod located at the end of the side fence by a spring. It was.

[0009]

[Action]

 According to the lock mechanism of the foldable side fence according to the present invention, the lever of the lock mechanism provided at the end of the upper horizontal bar is gripped and the protrusion of the fitting member and the vertical position at the end of the side fence are provided. By releasing the fitting with the fitting hole provided in the rod, the vertical rod can be turned, and the side fence can be folded. When the side fence is raised, the lock mechanism is fitted. The protrusion provided on the joint member is resiliently fitted from a substantially horizontal direction into the fitting hole of the vertical rod located at the end of the side fence by a spring, thereby preventing rotation of the vertical rod. Keep the fence upright.

[0010]

【Example】

 Hereinafter, the present invention will be described in more detail with reference to embodiments shown in the drawings.

FIG. 1 shows an example of a bed 2 to which a foldable side fence 1 having a lock mechanism 14 according to the present invention is attached. The bed 2 is provided with a headboard 4 and a footboard 5 which also serve as legs before and after a side frame 3 constituting a floor support member, and the headboard 4 and the footboard 5 are provided with casters 6. . A floor plate (not shown) is provided on the side frame 3 as the floor support member, and a mattress 7 is placed on the floor plate. A foldable side fence 1 is provided on the side frame 3.

In the folding side fence 1, a plurality of vertical bars 13 are provided on a lower horizontal bar 12 provided on a side frame 3 of the bed 2 at predetermined intervals so as to be able to move up and down. An upper horizontal rod 11 is pivotally mounted on the upper horizontal rod 11 and is provided so as to be freely foldable as shown by an imaginary line in the figure from a vertically upright state. It can be held in an upright state by a lock mechanism 14 provided therebetween. The side fence 1 is detachably mounted by fitting a mounting shaft 15 projecting from the lower surface of the lower horizontal rod 12 into a mounting hole (not shown) provided in the side frame 3 of the bed 2 as appropriate. ing.

As shown in FIG. 3, a vertical bar 13 provided on the lower horizontal bar 12 of the side fence 1 so as to be able to move up and down is supported on a lower end of the vertical bar 13 by a mounting member 16 fixed on the lower horizontal bar 12. It is pivotally mounted on a shaft 17. The upper surface and one side surface of the mounting member 16 are open, and the vertical rod 13 is mounted so as to be able to fall only on one side from a vertically upright state. On the other hand, the upper end of the vertical rod 13 is formed in a substantially L-shape. It is freely pivoted. As shown in FIGS. 4 and 5, for example, as shown in FIGS. 4 and 5, an upper end of a rod 13b made of an aluminum square pipe or the like is attached to an end member formed of a polyimide resin or the like into a substantially L shape. 13a is fitted. The upper horizontal rod 11 is formed by covering a frame 20 made in a substantially U-shape by extruding aluminum or the like with a cover 21 made of synthetic resin except for the lower surface thereof. A decorative sheet 22 made by applying a wood grain pattern or the like by extrusion molding of a vinyl chloride resin or the like is appropriately adhered to the surface of the sheet. The end member 13a provided at the upper end of the vertical rod 13 is attached to the upper end of the rod 13b in a state where the end member 13a is bent in a direction opposite to the falling direction of the vertical rod 13. The upper horizontal rod 11 is inserted into an opening 23 formed on the lower surface of the frame 20 between the left and right vertical sides 20a, 20a of the frame 20, and is rotatably mounted on the support shaft 18. The opening 23 on the lower surface of the frame 20 is large enough to allow the end member 13a of the vertical rod 13 to rotate about the support shaft 18 and when the vertical rod 13 stands upright. Further, the side surface of the end member 13a at the upper end of the vertical rod 13 is formed so as to abut the opening edge 23a on one side of the opening 23 so that the vertical rod 13 can be held upright.

The structure of the lock mechanism 14 for holding the side fence 1 in the upright state is shown in FIG. 7 and FIG. The lock mechanism 14 is provided on the side surface of the end member 13a provided at the upper end of the vertical rod 13A located at the end of the side fence 1 horizontally in the direction opposite to the bending direction of the end member 13a. One end of a lever 25 is rotatably mounted on a stopper member 30 provided at a side end portion of the upper horizontal rod 11. The tip of a rotating arm 26 rotatably connected to the other end is rotatably connected to a fitting member 27 movably provided in the frame 20 of the upper horizontal rod 11. The protrusion 28 provided at the tip of the joining member 27 is resiliently fitted by a spring 29 into a horizontal fitting hole 24 provided in the end member 13a of the vertical rod 13A located at the end. The rotation of the vertical rod 13A is prevented, so that the side fence 1 can be held upright. Then, as shown in FIG. 8, by gripping the lever 25 and releasing the fitting of the projection 28 into the fitting hole 24 against the urging force of the spring 29, the vertical rod 13A can be turned. By doing so, the side fence 1 can be folded.

As shown in FIG. 2, the folding side fence 1 provided with the lock mechanism according to the present invention grips the lever 25 of the lock mechanism 14 provided at the end of the upper horizontal rod 11. By releasing the engagement between the projection 28 of the fitting member 27 and the fitting hole 24 provided in the vertical rod 13A located at the end, the side fence 1 is turned to one side so that the vertical rod 13A can be turned. When the side fence 1 is in the upright state 1 "and the side fence 1 is in the upright state 1", the protrusion 28 provided on the fitting member 27 of the lock mechanism 14 is located at the end by the spring 29. By resiliently fitting into the fitting hole 24 of the rod 13A, rotation of the vertical rod 13A is prevented, and the vertical rod 13A is held in an upright state.

In this side fence, a substantially L-shaped end member 13 a is attached to the upper end of the vertical rod 13 of the side fence 1, and this end member 13 a is inserted into the frame 20 of the upper horizontal rod 11. As shown in FIG. 2, when the side fence 1 is folded, the substantially L-shaped end member 13a is inserted into the upper horizontal rod 11 so as to be rotatable. The rod 13b of the vertical rod 13 can be folded so as to overlap the upper and lower rods 11 substantially horizontally to the side, and the vertical rod 13 is mounted on a mounting member provided on the lower surface of the upper and lower rods 11 as in the related art. As in the case, the upper horizontal rod 11 and the lower horizontal rod 12 do not become largely separated and bulky.

In the above embodiment, the lower horizontal rod 12 of the side fence 1 is detachably mounted on the side frame 3 of the bed 2, and the vertical rod 13 is pivotally attached to the lower horizontal rod 12 so as to be able to move up and down. However, the vertical rod 13 may be pivotally connected directly to the side frame 3. Further, in this embodiment, an end member 13a formed in a substantially L-shape is provided only at the upper end of the vertical rod 13 and is pivotally mounted in the upper and horizontal rods 11. Similarly, the end of the portion may be bent, and the bent end may be pivotally attached to the lower horizontal rod 12 or the side frame 3 of the bed so as to be capable of falling.

[0018]

[Effect of the invention]

 As described above, the lock mechanism of the foldable side fence according to the present invention is located at the protrusion of the fitting member and the end of the side fence by grasping the lever of the lock mechanism provided at the end of the upper horizontal bar. By releasing the fitting in the horizontal direction with the fitting hole provided in the vertical rod, the vertical rod can be turned, and the side fence is folded to one side, and the side fence is raised. At this time, the protrusion provided on the fitting member of the lock mechanism is resiliently and horizontally fitted into the fitting hole of the vertical rod located at the end by a spring, thereby rotating the vertical rod. And the side fence is locked and released by locking the lever in the horizontal direction by the lever of the lock mechanism. It is not necessary to provide a double locking mechanism for safety because the side fence does not fall Since the vertical rod itself has a fitting hole, there is no need to provide a separate receiving member or the like on the vertical rod as in the past, and the lock and unlock can be performed safely and securely with a simple structure. Can be.

[Brief description of the drawings]

FIG. 1 is a side view of a bed equipped with a foldable side fence provided with a lock mechanism according to the present invention.

FIG. 2 is a side view showing a state where the side fence is folded.

FIG. 3 is a side view of a main part with a part broken away showing a state where the side fence is folded.

FIG. 4 is an exploded perspective view of a connecting portion between a vertical rod and an upper horizontal rod in the side fence.

FIG. 5 is a longitudinal sectional view of a connecting portion between a vertical rod and an upper horizontal rod.

FIG. 6 is a longitudinal sectional view of a connecting portion between a vertical rod and a lower horizontal rod.

FIG. 7 is a side sectional view of a main part showing a side fence lock mechanism according to the present invention.

FIG. 8 is a side sectional view of a main part showing an operation of the lock mechanism.

FIG. 9 is a side view of a bed showing a conventional example of a foldable side fence.

FIG. 10 is a partially broken side view showing a main part of the conventional side fence in a folded state.

FIG. 11 is a side sectional view of a lock mechanism in the conventional side fence.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Folding side fence 2 Bed 3 Side frame 4 Headboard 5 Footboard 6 Caster 7 Mattress 11 Upper horizontal rod 12 Lower horizontal rod 13 Vertical rod 13a End member 14 Lock mechanism 15 Mounting shaft 16 Mounting member 17 Support shaft 18 Support shaft 20 Frame 21 Cover 22 Decorative sheet 23 Opening 24 Fitting hole 25 Lever 26 Rotating arm 27 Fitting member 28 Fitting protrusion 29 Spring 30 Stopper member

Claims (1)

[Utility model registration claims] 1. A foldable side fence provided with a plurality of vertical bars undulatingly provided on a side frame of a bed and having an upper horizontal bar pivotally attached to an upper end of the vertical bar to be freely foldable. The upper end is formed in a substantially L-shape, and the bent end portion is pivotally connected to the upper horizontal rod, and the side of the bent upper end of the vertical rod located at the end of the side fence is bent. A substantially horizontal fitting hole is provided in the direction opposite to the bending direction of the upper end, and one end is rotatably connected to the other end of a lever rotatably provided at a side end of the upper horizontal rod. The distal end of the moving arm is connected to a fitting member movably provided in a substantially horizontal direction within the upper horizontal rod, and a protrusion provided at the distal end of the fitting member is located at the end of the side fence by a spring. A foldable side fence characterized by being resiliently fitted into a substantially horizontal fitting hole provided at a bent upper end portion of a vertical rod.