JP2016214338A - Lock mechanism of side fence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lock mechanism of a side fence, though having a relatively simple structure and facilitating the operation, improving reliability of lock by preventing a plunger from being accidentally slid and the lock from being unlocked.SOLUTION: After a contact part 34 of a slide inhibition member 30 with a rear end of a plunger 20 is retracted from a sliding path of the plunger, the plunger is slid so as to separate a tip end 20a of the plunger from the other so as to rotationally turn the side fence using a hinge structure 10.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a side fence locking mechanism for preventing an unnecessary operation of a side fence provided on a side portion of a stretcher.

  Conventionally, a side fence of a stretcher has been provided with a plate-like or bar-like side fence in order to prevent a patient or an elderly person who falls on the stretcher from falling. And when a patient etc. get on and off from a stretcher, this side fence is rotated to the side outer side of a stretcher, it is made to transfer to the side lower side of a stretcher, and the side surface on which the stretcher gets on and off is opened. A lock mechanism is provided to prevent the side fence from turning unnecessarily in a state where the side fence functions as a fence for preventing the fall or the like.

  As this side fence locking mechanism, for example, one disclosed in Patent Document 1 has been proposed. The multiple lock mechanism of the fence in the stretcher of Patent Document 1 includes a first lock mechanism that prevents rotation of the fence and a second lock mechanism that prevents unlocking of the first lock mechanism.

  More specifically, the lower part of the fence is connected to a rotary joint that can rotate around the rod axis and slide along the rod axis, and the first lock mechanism includes a first engagement step provided on the rotary joint, A second engagement step portion that engages with the first engagement step portion to prevent the rotation of the fence, and the first engagement step portion is a second engagement together with the fence that slides along the rod axis. It is possible to move between a lock position engaged with the stepped portion and an unlocked position released from the second engagement stepped portion, and the second lock mechanism is configured to move the fence when the first engagement stepped portion is in the locked position. This is a pusher that regulates the slide and is located in the space on the slide side, provided on the underside of the fence and on the side surface of the stretcher body, and the first lock mechanism and the second lock mechanism are released simultaneously. It is a structure that allows the fence to rotate when operated.

Japanese Patent No. 4472452

  However, the conventional fence multiple lock mechanism has a complicated structure, and there is a problem in operability such that the fence needs to be slid.

  The present invention has been made in view of such circumstances. The plunger is not accidentally slid to be unlocked, and the lock is reliable while the operation is easy with a relatively simple structure. An object of the present invention is to provide a side fence locking mechanism with improved performance.

  The side fence locking mechanism according to claim 1 is provided at a side portion of the stretcher, and the side fence is fixed so as to be rotatable outward from the side portion with the rod shaft as a pivot shaft. A hinge structure that is provided on the side fence side or the stretcher side, and a tip that protrudes on the opposite side of the side fence side or the stretcher side to restrict the rotation of the side fence by the hinge structure; A sliding restraining member that abuts against the rear end and regulates the sliding of the plunger, and retracts the abutting portion of the sliding restraining member with the rear end of the plunger from the sliding track of the plunger. The side fence can be turned using a hinge structure by sliding the plunger to disengage the tip of the plunger from the other party.

  In the side fence locking mechanism according to claim 2, the sliding restraining member is a surface forming member in which a plate member, a plate-like member or a bar member is assembled in a substantially square shape, and is substantially parallel to the axial direction of the sliding shaft of the plunger. While having a planar pressing surface, the contact portion is formed by an end portion of the pressing surface or an extending portion extending from the pressing surface.

  The lock mechanism of the side fence according to claim 3 is characterized in that the sliding suppression member is biased from a state where it is retracted from the sliding track of the plunger toward a state where the sliding of the plunger is restricted. And

  The side fence lock mechanism according to claim 4 regulates the sliding of the plunger from a state where the end of the sliding restraining member is pivotally supported in the vicinity of the position of the tip of the plunger and retracted from the sliding track of the plunger. It is characterized in that it is pivotally supported in a fan shape so as to be able to rotate between the two states.

  The lock mechanism of the side fence according to claim 5 is characterized in that the plunger is provided on the side fence side.

  The lock mechanism of the side fence according to claim 6 is characterized in that the sliding suppression member is provided on the side fence side.

  According to the invention of the present application, the plunger is not accidentally slid to be unlocked, and the reliability of the lock is improved while the operation is easy with a relatively simple structure.

It is explanatory drawing which shows an example of the structure of the locking mechanism of the side fence which concerns on this invention. It is explanatory drawing which shows the structure seen from the plane of the locking mechanism of the side fence. It is explanatory drawing which shows the structure of the locking mechanism of the side fence in a cross section. It is explanatory drawing which shows the structure seen from the left side surface of the locking mechanism of the side fence. It is explanatory drawing which shows the operation | movement seen from the plane of the locking mechanism of the side fence. It is explanatory drawing which shows the operation | movement seen from the left side surface of the locking mechanism of the side fence. It is explanatory drawing which shows the operation | movement seen from the plane of the locking mechanism of the side fence. It is explanatory drawing which shows the operation | movement of the locking mechanism of the side fence in a cross section. It is explanatory drawing which shows the operation | movement seen from the left side surface of the locking mechanism of the side fence. It is explanatory drawing which shows the structure seen from the plane of the other example of the sliding suppression member of the locking function of the side fence which concerns on this invention. It is explanatory drawing which shows the structure of the other example of the lock function of the side fence of FIG. 11 in a cross section.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is an explanatory view showing an example of the structure of a side fence locking mechanism according to the present invention. FIG. 2 is an explanatory view showing a structure viewed from the plane of the locking mechanism of the side fence. FIG. 3 is an explanatory view showing the structure of the locking mechanism of the side fence in section. FIG. 4 is an explanatory view showing a structure viewed from the left side of the locking mechanism of the side fence. FIG. 5 is an explanatory view showing an operation of the side fence lock mechanism as viewed from the plane. FIG. 6 is an explanatory view showing an operation viewed from the left side of the locking mechanism of the side fence. FIG. 7 is an explanatory view showing an operation of the side fence lock mechanism as viewed from the plane. FIG. 8 is an explanatory view showing the operation of the locking mechanism of the side fence in section. FIG. 9 is an explanatory view showing an operation viewed from the left side of the locking mechanism of the side fence.

  The locking mechanism 1 of the side fence 4 in the embodiment of the present invention is a locking mechanism for preventing unnecessary movement of the side fence 4 provided on the side of a stretcher (not shown). By operating the, the side fence 4 of the stretcher can be rotated in the outward direction from the side standing on the side of the stretcher.

  The lock mechanism 1 includes a hinge structure 10, a plunger 20, a sliding restraining member 30, and the like. The hinge structure 10 includes a base plate 18, a rotating plate 14, and a rod shaft 12. The base plate 18 is a narrow plate-like shape extending from the lower part of the stretcher toward the outer side of the side, and is provided with the plate surface standing upright. Further, two rotating plates 14 are provided horizontally with the base plate 18 so as to sandwich both plate surfaces of the base plate 18. One connecting plate 16 is provided in a substantially T shape at the outer end of the stretcher of the rotating plate 14 so as to extend over both ends of the two rotating plates 14.

  As shown in FIG. 9, the connecting plate 16 is provided with a substantially L-shaped sandwiching plate 16 a from the upper back surface of the connecting plate 16, and a thick plate shape is provided between the connecting plate 16 and the sandwiching plate 16 a. The side fence 4 is injected and the side fence 4 is fixed to the connecting plate 16 via the fixing member 6. A rod-shaped rod shaft 12 is inserted from one rotating plate 14 through the base plate 18 to the other rotating plate 14. With the hinge structure 10 having such a configuration, the side fence 4 is fixed so as to be rotatable outward from the side portion of the stretcher with the rod shaft 12 as a rotation shaft. It has a structure that has a surface in a direction orthogonal to the axial direction of the rod shaft 12 and rotates around the rod shaft 12 integrally with the side fence 4.

  The plunger 20 is a columnar bar, and has a plunger tip 20a whose diameter decreases toward the tip at the tip, and a knob 22 at the rear end. As shown in FIG. 3, the plunger 20 is inserted from the rotating plate 14 into a cylindrical plunger receiver 24 that stands vertically from the surface of the rotating plate 14, and the rear end protrudes from the plunger receiver 24 on the knob 22 side. In this state, the rear end side of the plunger receiver 24 is sealed with the cap 26, and the plunger front end 20 a passes through the through hole 14 a of the rotating plate 14 and protrudes toward the base plate 18 side. And the plunger 28 is urged | biased by the rotating plate direction by providing the spring 28 between the cap 26 and the plunger front-end | tip 20a. Further, in this energized state, the plunger tip 20a protrudes from the rotary plate 14 toward the base plate 18. On the base plate 18 side, a side fence is raised on the side of the stretcher. In this state, a lock hole 18a into which the protruding plunger tip 20a is inserted is formed.

  That is, as shown in FIGS. 1 to 7, when the plunger tip 20 a is inserted into the lock hole 18 a formed in the rotating plate 14, the plunger 20 provided on the side fence 4 side becomes the side fence. The plunger tip 20a protrudes from the base plate 18 on the stretcher side that is the opposite side of the four sides, thereby restricting the rotation of the side fence 4 by the hinge structure 10. In the locking mechanism 1 according to the present embodiment, the plunger 20 is provided on the side fence 4 side. However, the plunger 20 can be provided on the stretcher side. The plunger tip 20a of the plunger 20 protrudes to the side fence 4 side, which is the side, and the rotation of the side fence 4 is restricted.

  The sliding restraining member 30 is in contact with the rear end (knob 22) of the plunger 20 to restrict the sliding of the plunger 20. As shown in FIGS. 3 and 8, the sliding restraining member 30 has a bar portion 32 formed in a substantially U-shape with a bar portion, and a bar portion which is a contact portion 34 in a vertical direction at a substantially center. It is laid over. A plate material 36 is fitted into a substantially rectangular portion from the contact portion 34 toward the folded side of the frame portion 32. As shown in FIG. 2 and the like, the open end side of the frame portion 32 of the sliding restraining member 30 is bent obliquely in a plan view, and then bent again in the direction of the original straight line. A cylindrical rotating portion 38 is provided at the two open ends of the frame portion 32 of the sliding suppression member 30. A substantially L-shaped arm projects from the rotating portion 38 in a direction perpendicular to the plate member 36.

  In the sliding restraining member 30, the rotating portion 38 on the open end side sandwiches a cylindrical bearing 46 provided on the side surface of the plunger receiver 24 near the position where the plunger tip 20a of the plunger 20 slides up and down. The rotary shaft 40 is inserted into the bearing 46 and the rotary portion 38 again from the rotary portion 38. As a result, the rotating portion 38, the bearing 46, and the rotating shaft 40 form a hinge-like structure, or the sliding restraining member 30 is pivotally supported near the position where the plunger tip 20a of the plunger 20 slides. become.

  As a positional relationship between the knob 22 which is the rear end of the plunger 20 and the sliding restraining member 30, as a normal position, the knob 22 which is the rear end of the plunger 20 moves as shown in FIGS. This is a positional relationship in which the contact portion 34 of the sliding suppression member 30 is positioned on the sliding track of the plunger 20. That is, at the normal position of the sliding restraining member 30, even if the knob 20 of the plunger 20 is operated to slide the plunger 20, the knob 22 hits the contact portion 34 of the sliding restraining member 30, and the plunger 20 As a result, the side fence 4 cannot be rotated and the state where the side fence 4 is locked is maintained. The position shown in FIG. 2 is maintained as a normal position by a spring 44 spanned between the tip of the arm 42 of the sliding restraining member 30 and the hook 14b provided on the rotating plate 14. This is because the sliding suppression member 30 is urged to this normal position.

  In addition, since the end part of the sliding restraining member 30 is pivotally supported in the vicinity of the position where the plunger tip 20a of the plunger 20 slides, as shown in FIG. Between the normal position) and the state of being retracted from the sliding track of the plunger 20 (the retracted position), the fan is pivotally supported in a fan shape.

  Next, a method of using the lock mechanism 1 having the above configuration will be described. First, the sliding suppression member 30 shown in FIGS. 1-4 is in a normal position, and the side fence 4 is in the locked state. Next, as shown in FIGS. 5 and 6, the sliding restraining member 30 is pressed and rotated in the direction of the arrow. At this time, the frame part 32 of the sliding suppression member 30 may be pressed, the plate material 36 may be pressed, or both may be pressed. Thereby, the sliding suppression member 30 becomes a retracted position.

  Next, as shown in FIGS. 7 and 8, with the sliding restraining member 30 in the retracted position, the knob 22 is operated to slide the plunger 20 in the arrow direction. As a result, the plunger tip 20a of the plunger 20 comes out of the lock hole 18a of the base plate 18, and the rotating plate 14 and the connecting plate 16 connected to the rotating plate 14 become freely rotatable. The side fence 4 fixed to is unlocked (see FIG. 9). When the lock plate is released and the rotary plate 14 is rotated, the plunger tip 20a contacts the surface of the base plate 18 even if the knob 22 is released and the plunger 20 is returned to the lock hole 18a by the biasing force of the spring 28. The state where the lock is released is maintained only by touching. Further, even if the sliding restraining member 30 in the retracted position is released, the plate member 36 of the sliding restraining member 30 abuts on the knob 22, and the sliding restraining member 30 cannot return to the normal position. , The unlocked state is maintained. That is, it is in a freely rotatable state except when the side fence 4 is in a locked position.

  When the side fence 4 is to be locked, the side fence 4 is rotated to the position to be locked. Then, the plunger tip 20 a of the plunger 20 is in a positional relationship that can be inserted into the lock hole 18 a of the base plate 18, and the plunger tip 20 a is inserted into the lock hole 18 a by the biasing force of the spring 28. Then, the plunger 20 and the knob 22 return to the positions shown in FIGS. When the pressing of the sliding suppression member 30 is released, the sliding suppression member 30 returns to the normal position by the biasing force of the spring 44. Thereby, the side fence 4 returns to the locked state.

  According to the lock mechanism 1 having the above-described configuration, the contact portion 34 with the knob 22 that is the rear end of the plunger 20 of the sliding restraining member 30 is retracted from the sliding track of the plunger 20, and then the plunger Since the side fence 4 can be rotated by using the hinge structure 10 by sliding the plunger 20 and detaching the plunger tip 20a of the plunger 20 from the other party, the plunger 20 is accidentally slid and locked. The lock reliability is improved with a relatively simple structure. In the present embodiment, the plunger 20 is provided on the side fence 4 side and is inserted into the base plate 18 on the stretcher side. However, the plunger 20 is provided on the stretcher side, The structure which locks a certain side fence 4 side may be sufficient.

  However, the plunger 20 and the sliding restraining member 30 can be arbitrarily provided on either the stretcher side or the side fence 4 side, respectively, but the plunger 20 is placed on the side fence 4 side as in the present embodiment. The locking mechanism 1 of the present application can be provided by modifying or replacing the side fence 4 side without modifying the basic structure of the stretcher by providing or sliding prevention member 30 on the side fence 4 side. It can be provided.

  In addition, the sliding restraining member 30 shown in FIGS. 1 to 9 has a bar portion 32 formed in a substantially U-shape with a rod member, and a rod member that is a contact portion 34 is vertically extended substantially in the center. A plate material 36 is fitted into a substantially rectangular portion from the contact portion 34 toward the folded side of the frame portion 32, and a surface (pressing surface) is formed by the frame portion 32 and the plate material 36. ing. In the actual operation, the plunger 20 can be slid by pulling the knob 22 of the plunger 20 while operating the sliding restraining member 30 with the back of the hand. It is. As described above, the structure having the substantially planar pressing surface parallel to the axial direction of the sliding shaft of the plunger 20 facilitates the unlocking operation. As a form in which such a pressing surface is formed, it is preferable that the sliding suppression member 30 is formed of a surface forming member in which a plate member, a plate-like member, or a bar member is assembled in a substantially square shape. Furthermore, the contact portion of the sliding suppression member 30 may be formed by an end portion of the pressing surface or an extending portion extending from the pressing surface.

  As a form different from the sliding restraining member 30 shown in FIGS. 1 to 9, for example, there is a form of the lock mechanism 2 shown in FIGS. 10 and 11. The sliding restraining member 50 in FIGS. 10 and 11 is obtained by bending a plate-like member into a substantially S-shape formed by a straight line. This is the same as the movement suppressing member 30. However, the contact portion 54 of the sliding suppression member 50 is formed by an end portion of the plate-like plate material 52 forming the pressing surface or an extending portion extending from the pressing surface. The sliding restraining member 50 having such a structure also has the same functions and effects as the sliding restraining member 30.

  As described above, a side fence locking mechanism that improves the reliability of the lock while being easy to operate with a relatively simple structure without the plunger being accidentally slid to be unlocked is provided. can do.

DESCRIPTION OF SYMBOLS 1 ... Lock mechanism 2 ... Lock mechanism 4 ... Side fence 6 ... Fixing member 10 ... Hinge structure 12 ... Rod shaft 14 ... Rotating plate 14a ... through hole 14b ... hook 16 ... connecting plate 16a ... clamping plate 18 ... base plate 18a ... lock hole 20 ... plunger 20a ... · Plunger tip 22 ··· Knob 24 ··· Plunger receiver 26 ··· Cap 28 ··· Spring 30 · · · Slide restraining member 32 · · · Frame 34 ··· Contact portion 36... Plate member 38... Rotating portion 40... Rotating shaft 42 ... Arm 44 ... Spring 46 ... Bearing 50. .... Plate material 54 ... Contact part 56 ... Rotating part 58 ... Arm

Claims (6)

In the side fence locking mechanism that prevents unnecessary movement of the side fence provided on the side of the stretcher,
A hinge structure provided on the side of the stretcher, the side fence being fixed so as to be pivotable outwardly from the side standing on the side of the stretcher with the rod axis as a pivot axis;
A plunger that is provided on the side fence side or the stretcher side, and whose tip protrudes to the opposite side of the side fence side or the stretcher side, thereby restricting the rotation of the side fence by the hinge structure;
A sliding restraining member that abuts on the rear end of the plunger and regulates the sliding of the plunger;
By retracting the contact portion of the sliding restraining member with the rear end of the plunger from the sliding track of the plunger and sliding the plunger to disengage the tip of the plunger from the counterpart. A locking mechanism for the side fence, wherein the side fence can be rotated using the hinge structure. The sliding suppression member is
It is a surface forming member in which a plate material, a plate-shaped member or a bar is assembled in a substantially rectangular shape
While having a substantially planar pressing surface parallel to the axial direction of the sliding shaft of the plunger,
2. The side fence locking mechanism according to claim 1, wherein the contact portion is formed by an end portion of the pressing surface or an extending portion extending from the pressing surface.   The said sliding suppression member is urged | biased from the state withdrawn from the sliding track | orbit of the said plunger toward the state which regulates the sliding of this plunger. The locking mechanism of the described side fence. The end of the sliding suppression member is pivotally supported near the position of the tip of the plunger,
4. A shaft is rotatably supported in a fan shape between a state retracted from a sliding track of the plunger and a state in which sliding of the plunger is restricted. The side fence locking mechanism according to any one of the above. The side fence lock mechanism according to any one of claims 1 to 4, wherein the plunger is provided on the side fence side.   The side fence locking mechanism according to any one of claims 1 to 4, wherein the sliding suppression member is provided on the side fence side.

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