KR20220155390A - opening device - Google Patents

Abstract

The opening device includes a locking mechanism for locking the top cover to the outer frame, a pedal installed on the top cover, and a link mechanism for unlocking the locking mechanism by operating the pedal. The locking mechanism switches between a locking portion capable of locking with respect to the outer frame, a locked state of maintaining the locking of the locking portion to the outer frame, and an unlocking state of releasing the locking of the locking portion to the outer frame. a first state maintaining means capable of switching between a locked state for maintaining the locked state of the lock member and an unlocked state for maintaining the unlocked state of the lock member according to the operation of the link mechanism; When the first state holding means is switched to the unlock holding state, a second state holding means for maintaining the unlock holding state regardless of the operation of the link mechanism is provided.

Description

opening device

The present disclosure relates to an opening device.

BACKGROUND OF THE INVENTION [0002] Opening devices through which people can enter and exit, such as evacuation hatches used in case of emergency evacuation, such as a doorway or fire, are installed on rooftops and verandas of buildings such as public facilities and condominiums. The opening device is provided with a top cover that covers the opening so that people cannot normally fall or come in and out.

In addition, as an evacuation device installed in an opening device with a top cover, a rescue platform, a folding ladder, and a device similar to a vertically descending elevator are also being considered.

If this kind of opening device is installed in a place visible to infants, there is a possibility that infants may open the top cover and mischief.

Therefore, safety is increased by surely preventing the opening of the top cover by infants' weak lifting power, and the opening of the top cover by normal lifting power of adults except for infants is allowed, so that the top cover can be quickly removed in case of emergency evacuation. An opening device capable of opening the is being studied (see Japanese Unexamined Patent Publication No. 11-290470).

However, there is a problem in that it is not easy for the elderly or physically handicapped, especially wheelchair users, to reach up to the top cover on the floor and lift and open the top cover with a lifting force greater than the set value at which the locked state is released. In addition, when the opening is large, the top cover is enlarged and the weight of the entire top cover is increased, making it more difficult to lift.

An object of the present disclosure is to provide an opening device capable of easily opening a top cover without having to reach up to the top cover on the floor and release the locked state with one's hand.

In order to solve the above problem, an opening device according to a first aspect is provided with an outer frame having an opening through which people can come in and out, and an upper end side that is rotatably pivotally supported by the outer frame and covers the opening. A cover, a locking mechanism for locking the upper cover to the outer frame in a state in which the opening is covered, a pedal installed on the upper cover, and connecting the pedal and the locking mechanism to the locking mechanism by operating the pedal. A link mechanism for releasing the lock, and an elastic pressing means for rotating the top cover in an opening direction when the lock mechanism is released according to the operation of the pedal.

According to the 1st aspect, the pedal which unlocks the locking mechanism via a link mechanism by operation is provided in the top cover. The locking mechanism can be unlocked via a link mechanism connecting the pedal and the locking mechanism by operating the pedal by stepping on it with the foot or, in the case of a wheelchair, by stepping on the front wheel of the wheelchair. When the locking mechanism is unlocked, the top cover may be opened in the opening direction by the elastic pressing force of the elastic pressing means.

As a result, a wheelchair user who cannot reach up to the top cover on the floor to unlock it with his or her own hands and lift and open the top cover can open the top cover by manipulating the pedals with the legs or the front wheel of the wheelchair. .

In the opening device of the second aspect, in the opening device of the first aspect, the link mechanism includes: an interlocking part that interlocks with the operation of the pedal; and an operating unit for unlocking the locking mechanism when the locking mechanism is moved by a predetermined amount without unlocking the locking mechanism.

According to the second aspect, the interlocking part of the link mechanism works according to the operation of the pedal. Then, the operation unit connected to the link mechanism unlocks the lock mechanism when the pedal is operated to move a predetermined amount. For this reason, the locking mechanism can be unlocked via the link mechanism and the operation part by operating the pedal.

In the opening device of the third type, in the opening device of the second type, two pedals are installed on the top cover, and when one of the two pedals is operated, the movement amount of the operation unit does not exceed the predetermined amount. Otherwise, when the two pedals are operated together, the movement amount is equal to or greater than the predetermined amount.

According to the third aspect, two pedals are provided on the edge of the top cover, and the movement amount of the operating portion does not reach the predetermined amount unless the two pedals are operated together in the link mechanism. In this way, if the two pedals are not operated together, the movement of the operating unit is formed to fall short of the predetermined amount, so that even if one pedal is operated by a child or the like or accidentally steps on one pedal with one foot, the locking mechanism is not released. don't Therefore, it is possible to suppress mischief by infants or the like, and to prevent accidental opening of the top cover.

In the opening device of the fourth aspect, in the opening device of the third aspect, the linkage part is directly or indirectly connected to the pedal at a communication part spaced apart from each other, and the corresponding contact part by operation of the pedal sets the predetermined value. It is connected to a follower moving in the direction and an intermediate portion between the two contact portions in the follower, and the operating portion unlocks the locking mechanism when the intermediate portion moves in the predetermined direction. It is provided with an induction unit that leads to.

According to the fourth aspect, in the link mechanism, the follower moves in response to the operation of the pedal, and pulls the operation unit in response to the amount of movement of the follower. This provides a link mechanism in which the amount of movement of the operating portion does not reach a predetermined amount unless the two pedals are operated together.

In the opening device of the fifth aspect, in the opening device of the fourth aspect, the operating portion is connected to a plurality of the locking mechanisms, and the guide portion guides the operating portion to simultaneously unlock each of the locking mechanisms.

According to the fifth aspect, the operating portion is connected to a plurality of locking mechanisms, and when the guide portion moves in a predetermined direction, locking of the plurality of locking mechanisms is released. This provides a mechanism of the operating portion for unlocking the locking mechanism.

In the opening device of the sixth aspect, in the opening devices of the first to fifth aspects, the locking mechanism includes a locking portion (specifically, a lock ring) capable of engaging with the outer frame (specifically, a locking bar). ) And, installed on the top cover, the locking state of maintaining the locking of the locking part to the outer frame and the unlocking state of releasing the locking of the locking part to the outer frame A lock member (for example, a first lock cam), a locked state of maintaining the locked state of the lock member, and an unlocked state of maintaining the unlocked state of the lock member according to the operation of the link mechanism switchable first state maintaining means and, when the first state maintaining means is switched to the unlocked holding state, second state maintaining means for maintaining the unlocked holding state irrespective of the operation of the link mechanism; provide

According to the sixth aspect, the locking mechanism installed on the top cover locks a part of the outer frame (specifically, the lock bar) in the locked state so that the top cover is not separated from the outer frame and the locking mechanism is in a locked state.

In addition, since the locking part installed on the upper cover does not lock a part of the outer frame in the unlocked state, the upper cover becomes a state in which the upper cover can be separated from the outer frame, and the locking mechanism is unlocked and unlocked.

Further, the locking mechanism can maintain the locked state by the first state maintaining means maintaining the locked state.

Further, when the first state maintaining means is switched to the unlocked holding state, the second state maintaining means maintains the unlocked holding state regardless of the operation of the link mechanism, thereby changing the locked state to the unlocked state by operating the pedal. , Even if a hand, foot, front wheel, etc. is separated from the pedal and operation of the pedal is stopped, it is possible to prevent the locking mechanism from returning to the locked state by shifting from the unlocked state to the locked state.

An opening device of a seventh aspect, in the opening device of a sixth aspect, wherein the locking mechanism has the locking portion and is capable of changing the locking state and the unlocking state of the locking portion by rotating is first as the locking member. a locking cam, wherein the first state retaining means includes a blocking state of preventing rotation of the first locking cam in the locking state and allowing rotation of the first locking cam according to an operation of the link mechanism. The rotatable branch between states is a second lock cam, and the second state maintaining means returns the second lock cam to the inhibited state when the second lock cam is rotated from the inhibited state to the allowed state. suppress

According to the seventh aspect, the locking state and the unlocking state of the locking portion can be changed by rotating the first locking cam with the locking portion capable of locking a part of the outer frame.

Further, the second lock cam as the first state retaining means puts the locking portion into a locked state by putting the rotation of the first lock cam in a blocking state, and the second lock cam rotates in accordance with the operation of the link mechanism, thereby preventing the rotation of the first lock cam. A state in which rotation of the lock cam is permitted is entered, and rotation of the first lock cam is enabled.

Further, the second state maintaining means prevents the second lock cam from returning to the blocking state when the second lock cam rotates from the blocking state to the permitted state.

In the opening device of the eighth aspect, in the opening device of the seventh aspect, the second state retaining means is an urging member connected to the first lock cam and the second lock cam.

According to the eighth aspect, the urging member suppresses the return from the permitted state to the inhibited state. Thus, when the second lock cam is in an allowed state by the urging member, a mechanism for suppressing return to the inhibited state is provided.

An opening device of a ninth aspect is provided with an evacuation device (for example, a folding ladder or a rescue table) housed in whole or in part in the outer frame in the opening devices of the first to eighth aspects.

According to the ninth aspect, an evacuation device that is wholly or partially housed in an outer frame is provided. For this reason, by opening the upper frame to the outer frame, it is possible to evacuate to the lower floor using the evacuation device.

Fig. 1A is a perspective view of the installed state of the opening device according to the first embodiment when viewed from an oblique upward direction.
[ Fig. 1B ] A perspective view of the installed state of the opening device according to the first embodiment when viewed from an oblique downward direction.
Fig. 2 shows the operation of the evacuation device according to the first embodiment, and is a side view showing a state where the platform is in a standby position.
[Fig. 3] It is a plan view of the evacuation device of the opening device according to the first embodiment.
[ Fig. 4A ] It is a plan view showing the opening device according to the first embodiment.
[FIG. 4B] A partially enlarged plan view illustrating an enlarged opening stopper in FIG. 4A.
Fig. 5 is a longitudinal sectional view showing the opening device according to the first embodiment.
Fig. 6 is a partially enlarged longitudinal sectional view showing a state in which the top cover of the opening device according to the first embodiment is closed.
Fig. 7 is a partially enlarged longitudinal sectional view showing a state in which the top cover of the opening device according to the first embodiment is opened to a half-open angle.
Fig. 8 is a partially enlarged longitudinal sectional view showing a state in which the top cover of the opening device according to the first embodiment is opened to 90°.
Fig. 9 is a side view and partially enlarged side view showing a state in which a wheelchair user is operating a pedal to the opening device according to the first embodiment.
[Fig. 10] A plan view showing the lock mechanism and link mechanism of the opening device according to the first embodiment.
Fig. 11 is a front view showing the lock mechanism and link mechanism of the opening device according to the first embodiment.
Fig. 12 is a partial longitudinal sectional view of the opening device according to the first embodiment, in a state immediately before the front wheels of the wheelchair step on the pedals.
Fig. 13 is a partial longitudinal sectional view of the opening device according to the first embodiment in a state where the front wheel of the wheelchair is pedaling.
[Fig. 14] In the opening device according to the first embodiment, it is a side view of the link lever before the front wheels of the wheelchair step on the pedals.
Fig. 15 is a side view of the link lever in a state where the front wheel of the wheelchair is pedaling in the opening device according to the first embodiment.
[Fig. 16] In the opening device according to the first embodiment, it is a partial longitudinal sectional view of the locking mechanism in a locked state before the front wheels of the wheelchair step on the pedals.
[Fig. 17] In the opening device according to the first embodiment, it is a partial longitudinal sectional view of the locking mechanism in a state where the front wheel of the wheelchair is pedaling.
[Fig. 18] In the opening device according to the first embodiment, it is a partial longitudinal sectional view of the locking mechanism in a state where the front wheel is separated from the top cover.
[Fig. 19] In the opening device according to the first embodiment, it is a partial longitudinal sectional view of the locking mechanism in a state in which the top cover is opened.
[Fig. 20] In the opening device according to the first embodiment, it is a partial longitudinal sectional view of the locking mechanism in a closed state of the top lid.
[Fig. 21] In the opening device according to the first embodiment, it is a partial longitudinal sectional view of the locking mechanism in a state in which the top lid is locked.
Fig. 22 is a front view of an operation unit in the opening device according to the first embodiment, in a state in which two pedals are operated (dashed-dotted line) and in a state in which only one pedal is operated (solid line).
[Fig. 23] In the opening device according to the first embodiment, it is a partial longitudinal sectional view of the locking mechanism in a state in which only one pedal is operated and the displacement of the operating unit is half.
Fig. 24 is a schematic perspective view of the opening device according to the first embodiment, in a state in which both pedals are not operated and the locking mechanism is locked without the operating portion springing up.
[Fig. 25] In the opening device according to the first embodiment, it is a schematic perspective view showing a state in which the locking mechanism is unlocked by operating two pedals to jump up the operation part. [Fig.
Fig. 26 is a schematic perspective view showing a locking mechanism in a state where only one pedal is operated and the displacement of the operating part is halved in the opening device according to the first embodiment.
Fig. 27 is a perspective view showing an operation unit, a link mechanism, and a locking mechanism in the opening device according to the second embodiment.
Fig. 28 is a perspective view showing an operation unit and a link unit in the opening device according to the second embodiment.
[Fig. 29] In the opening device according to the second embodiment, it is a side view of the operation unit and the link mechanism before the front wheels of the wheelchair step on the pedals.
Fig. 30 is a side view of the operating unit and link mechanism in a state where the front wheel of the wheelchair is pedaling in the opening device according to the second embodiment.
Fig. 31 is a perspective view showing an interlocking part and an operating part of an opening device according to a second embodiment.
Fig. 32 is a plan view showing an interlocking part and an operating part of an opening device according to a second embodiment.
[Fig. 33] In the opening device according to the second embodiment, it is a plan view showing a state in which the locking mechanism is unlocked by operating the two pedals and pulling the interlocking part and the operating part. [Fig.
[Fig. 34] In the opening device according to the second embodiment, it is a plan view showing a link mechanism in a state where only one pedal is operated and the displacement of the interlocking part and the operating part is halved.
[Fig. 35] It is a partial perspective view of the locking mechanism in the opening device according to the second embodiment.
Fig. 36 is a partial longitudinal sectional view of the locking mechanism in the locking state before the front wheels of the wheelchair step on the pedals in the opening device according to the second embodiment.
[Fig. 37] In the opening device according to the second embodiment, it is a partial longitudinal sectional view of the locking mechanism in a state where the front wheel of the wheelchair is pedaling.
Fig. 38 is a partial longitudinal sectional view of the locking mechanism in a state where the front wheel is separated from the top cover in the opening device according to the second embodiment.
[Fig. 39] In the opening device according to the second embodiment, it is a partial longitudinal sectional view of the locking mechanism in a closed state of the top lid.
Fig. 40 is a partial longitudinal sectional view of the lock mechanism in a state where the lock bar rotates the first lock cam in the opening device according to the second embodiment.
Fig. 41 is a partial longitudinal sectional view of a locking mechanism in a state where only one pedal is operated in the opening device according to the second embodiment.

[First Embodiment]

First, as shown in FIGS. 1A and 1B , the opening device 8 according to the first embodiment and the evacuation device 11 installed in the opening device 8 are used to move from an upper floor corridor or veranda to a lower floor in an emergency. It is used to evacuate to corridors or verandas. The opening device 8 has an outer frame 100 fitted and fixed to the floor portion on the upper floor side to form an opening 3 for evacuation.

The evacuation device 11 according to the first embodiment includes a guide post 1 erected on a floor surface 4 of a lower floor and fixed at an upper end to the outer frame 100, and a platform 5 (FIG. 2, FIG. 3) has. The platform 5 is driven up and down between a standby position held in the outer frame 100 for evacuation and an evacuation position descending from this standby position along the guide post 1 and landing on the floor surface 4 of the lower floor. .

The guide post 1 is a hollow pipe body having appropriate buckling strength, and is formed, for example, by extruding aluminum. The lower end of the guide post 1 is fixed to the floor part 2 of the lower floor and the upper end to the outer frame 100. In addition, a rack groove 15 is formed on one side wall of the guide post 1.

The outer frame 100 is provided with a top cover 110 whose one end side is rotatably supported by the outer frame 100 and can cover the opening 3 . In the present embodiment, the top lid 110 constitutes an opening device 8 capable of opening and closing the opening 3 by a predetermined mechanism described later, and the contents of the opening device 8 will be described in detail later. I'm going to do it. In addition, in this embodiment, the locking mechanism 200 which locks the top cover 110 to the outer frame 100 in the state which covered the said opening 3 is provided. The contents of the corresponding locking mechanism 200 will also be described later in detail.

Also, a weight that can be suspended by a predetermined wire is accommodated in the hollow part of the guide post 1. An end opposite to the fixed end of the wire to the weight is connected to the platform 5, and a pulley is disposed between the weight and the fixed end to the platform 5. The weight is set to a weight capable of lifting the platform 5 in a state in which the user is not on board, and when the user lowers the platform 5 after reaching the lower floor, the weight of the weight causes the platform ( 5) is configured to return to the standby position.

On the other hand, the platform 5 is formed with a support post insertion opening 5a (see Fig. 3) through which the guide post 1 is inserted. The post insertion openings 5a are formed on the side of the adjacent edge 7 adjacent to both outer sides of the boarding edge 6 serving as a boarding gate when the evacuee gets on the platform 5 in the waiting position. These post insertion passages and openings 5a are formed at the same distance from the boarding edge 6, and two guide posts 1 are installed at opposite positions corresponding to these post insertion passages and openings 5a.

As described above, a pinion 13 or the like is disposed around the post insertion passage and the opening 5a to elevate the platform 5 along the guide post 1 passing through the post insertion passage and the opening 5a.

The pinion 13 engages with the rack groove 15 of the guide post 1. In addition, a device may be provided that operates by rotating the pinion 13 using a centrifugal brake to limit its rotational speed.

In addition, on the surface of the platform 5, there are wheel guide grooves 17 for guiding the wheels 16a and the front wheels 16b of the wheelchair 16 to enable use by the wheelchair 16 (see FIG. 3). It is arranged concavely. The wheel guide groove 17 is formed over almost the entire length from the boarding edge 6 of the platform 5 to the inner edge 7a, and boarding of the wheelchair 16 on the platform 5 is performed at the boarding edge ( After getting on from 6), it is moved in the direction of the inside edge 7a.

In addition, as shown in FIG. 2, in the wheel guide groove 17, an inclined surface 20 extending to the boarding edge 6 is provided at a position spaced apart from the boarding edge 6 by a predetermined distance as the starting end 19. After evacuating to the lower floor, a step is prevented when the wheelchair 16 is retracted and lowered onto the floor surface 4 of the lower floor.

In addition, in order to absorb the step difference between the platform 5 and the floor surface 4 on the upper floor when the platform 5 is in the standby position, a slope member 18 is attached to the outer frame 100 via a slope control body 25. do.

In addition, in the description in this specification, the description of the "clockwise" rotation direction or the "counterclockwise" rotation direction refers to the "clockwise" rotation direction when the corresponding drawing is viewed from the front when the drawing is described, "Counterclockwise" means the direction of rotation. Reference numeral 18a in the figure denotes a standing piece for a guide, 18b denotes a rotating shaft member, 25a denotes a support rod, and 25b denotes a tire member.

In addition, as shown in FIG. 3, handrails 26 are mounted on the lift platform 5. The handrail 26 is formed in a U shape with a horizontal rail 26a and a vertical rail 26b extending in a right angle direction from both ends of the horizontal rail 26a, and is Mounting is performed by rotatably connecting the free end of each longitudinal rod 26b to the vicinity of the inner edge 7a of the platform 5.

This handrail 26 is always urged toward the use posture by a spring. When in use, it is formed so as to move to a standing posture without any special operation (by opening the top cover 110).

In addition, in the evacuation device 11, a stopper device for holding the platform 5 in a standby position is installed, and a manual release operation unit for manually releasing the stopper device is provided in the cross section 26a of the handrail 26 (29) is placed.

Therefore, when the lift platform 5 is in the stand-by position, descent of the lift platform 5 is regulated via the stopper device.

In this state, by manually operating the manual release operation unit 29, the stopper device is manually released, and the descent of the platform 5 is started.

(Mechanism of opening device 8 capable of covering opening 3 by top cover 110)

The mechanism of the opening device 8 capable of covering the opening 3 by the top cover 110 will be described below.

As shown in FIGS. 1 to 9 , the opening device 8 according to the present embodiment rotates an outer frame 100 having an opening 3 through which people can come in and out, and one end side to the outer frame 100. A top cover 110 capable of being pivotally supported to cover the opening 3, a locking mechanism 200 locking the top cover 110 to the outer frame 100 in a state in which the opening 3 is covered, and the locking mechanism 200 The operation unit 120 (specifically, the pedal 130) for unlocking the mechanism 200, the outer frame 100, and the top cover 110 are connected, and the opening of the top cover 110 is set to the maximum opening angle. (Specifically, an opening stop portion 150 for stopping at 90°) and an urging means 140 for urging the top cover 110 in the opening direction are provided.

And the opening stop part 150, the 1st arm 160 rotatably connected to the outer frame 100, and the 2nd arm rotatably connected to each of this 1st arm 160 and the top cover 110, (170) is provided.

And when the top cover 110 is closed, the first arm 160 and the second arm 170 are formed to be folded, and when the locking of the locking mechanism 200 is released by manipulation of the manipulation unit 120, the elastic pressing means ( 140), the top cover 110 is formed to be opened by another elastic pressing means 145.

The above content will be described in more detail using the drawings of FIGS. 4 to 9 .

4A is a plan view of the top cover 110, and FIG. 4B is a partially enlarged plan view of the top cover 110. As shown in FIG. 5, the top cover 110 has a low left side height and a right side high side. formed high.

As shown in FIGS. 5 to 8 , the upper lid 110 has an edge side with a higher height of the upper lid 110 that rotates to the outer frame 100 via a rotating shaft 112. is supported In addition, the outer frame 100 is integrally formed with the case 21 . As shown in FIG. 8 , the top cover 110 according to this embodiment is formed so as to be able to rotate up to 90° (maximum opening angle) with respect to the outer frame 100 as will be described later.

In addition, as will be described later, on the lower edge of the upper cover 110 on the left side of FIG. 5, a locking mechanism 200 for locking the upper cover 110 to the outer frame 100 while the opening 3 is covered is installed. And, as shown in FIG. 4A, on the left edge side of the top cover 110, two pedals 130 as an operation unit 120 for unlocking the locking mechanism 200 are installed along the corresponding edge, have. These two pedals 130 are formed to match the distance between the two front wheels 16b of a general wheelchair 16, and as shown in FIG. 9, the left and right front wheels 16b of the wheelchair 16 from the left In, it is formed so that it can be operated by stepping on the end of the corresponding pedal 130 from above.

At the center of the upper surface of the top cover 110, a stepped portion 111 having a rectangular shape in plan view and slightly concave than the circumference is formed. By installing the stepped portion 111, the top cover 110 is reinforced to improve rigidity.

In the present embodiment, narrow plate-shaped connection brackets 113 are fixed to both ends of the top cover 110, and elastic pressing means 140 and second arms 170 are attached to the connection brackets 113. connected. A stopper 180 to be described later is also installed on this connecting bracket 113.

As shown in FIGS. 4A, 4B, 5 and 6, the outer frame 100 and the outer frame 100 and the rotation shaft 112 side of the upper lid 110 are provided on the edge side where the rotation shaft 112 of the top cover 110 is provided. An elastic pressing means 140 connecting the is provided. This urging means 140 is a gas spring, and applies an urging force in the direction of pushing the piston rod 142 in the cylinder 141 by the pressure of the gas filled therein.

And, as described above, an opening stopper 150 is provided to connect the outer frame 100 and the vicinity of the rotating shaft 112 side of the upper lid 110 and stop the opening of the upper lid 110 at the maximum opening angle.

This opening stopper 150 is provided with a first arm 160 rotatably connected to the outer frame 100 and a second arm rotatably connected to each of the first arm 160 and the top lid 110. (170) is provided.

In this embodiment, the 1st arm 160 consists of another urging means 145 different from the urging means 140 mentioned above. This other urging means 145 is also a gas spring similar to the above-mentioned urging means 140, and is elastic in the direction of pushing the piston rod 147 in the cylinder 146 by the pressure of the gas filled therein. apply pressure. Further, the second arm 170 is not an elastic pressing means, but is made of a rod-like member having a substantially U-shaped cross section.

In addition, the end of the piston rod 142 of the elastic pressing means 140 is rotatably connected to the connecting bracket 113 and the end of the cylinder 141 of the elastic pressing means 140 to the outer frame 100. One end of the first arm 160 is attached to the outer frame 100 by the first axis (C), and the other end of the first arm 160 is attached to one end of the second arm 170 by the third axis (E). It is rotatably connected. The other end of the second arm 170 is rotatably connected to the connection bracket 113 by the second shaft D.

Further, in this embodiment, of the first arm 160 and the second arm 170, the first arm 160 is composed of another urging means 145, and the second arm 170 is a rod-like member. It is made, but is not particularly limited thereto. Specifically, for example, the structures of both can be reversed, the second arm 170 can be formed by another urging means 145, and the first arm 160 can be formed by a rod-like member. In this case, it is good also as a structure which attaches the stopper 180 to the outer frame 100 and makes it contact with the 1st arm 160.

As shown in FIG. 5, between the edge opposite to the rotation shaft 112 of the top cover 110 and the outer frame 100, the top cover 110 is in a horizontal state with an opening 3 (see FIGS. 1 and 2). And a locking mechanism 200 for locking the top cover 110 to the outer frame 100 in a state of covering the upper side of the platform 5 is formed. When the two pedals 130 installed on the edges of the top cover 110 are operated, the lock mechanism 200 is unlocked.

In addition, the contents of the locking mechanism will be described in detail later. When the lock of the locking mechanism 200 is released, the top cover 110 in a horizontal state as shown in FIGS. 145), specifically, the top cover 110 by the elastic pressing force of four elastic pressing means (two elastic pressing means 140 and two other elastic pressing means 145) in total on the right and left sides. Force is applied in the opening direction, and the top cover 110 rotates in the opening direction with the rotation shaft 112 as the center of rotation.

As shown in Fig. 7, the upper lid 110 is at an angle of about 70° (specifically, for example, 66°, hereinafter, as an example of a predetermined angle) to the outer frame 100 (horizontal direction). When opened by the rotational angle of (referred to as "half-opening angle" in ), the other elastic pressing means 145 as the first arm 160 is in a state where the piston rod 147 is extended from the cylinder 146 to the end, Beyond that, the piston rod 147 is in a state where it does not extend outward in the cylinder 146. Therefore, after the stretched state to the corresponding end, the elastic pressing force from the other elastic pressing means 145 as the first arm 160 is not generated.

That is, the first arm 160 according to the present embodiment is another urging means 145 that extends the piston rod 147 to the maximum operating length as a gas spring. Then, the second arm 170 in the middle of extending this other urging means 145 contacts the stopper 180 at the point B shown in FIG. are pressed In addition, the first arm 160 comes into contact with the stopper 180 at the corresponding point B until the piston rod 147 is extended to the maximum operating length, that is, while shown in FIGS. 6 to 7 .

Further, when the second arm 170 rotates in a direction in which the other urging means 145 reaches the maximum operating length and the other urging means 140 is deployed with respect to the other urging means 145. , The maximum opening angle can be maintained by contacting the stopper 180 at point A shown in FIG. 8 .

That is, when the top cover 110 is opened to the maximum opening angle, the stopper 180 comes into contact with point A of the second arm 170 to restrict additional rotation.

As described above, when the upper cover 110 is to be further opened after the upper cover 110 is opened at a half-open angle in a horizontal state, the upper cover 110 is elastically pressed by the elastic pressing means 140. ) becomes more open.

In addition, since the first arm 160 is stretched to the end, the piston rod 147 no longer protrudes outward, but the second arm 170 connected to the distal end of the first arm 160 is shown in FIG. 7, FIG. As shown in 8, it rotates with respect to the first arm 160. Due to this, it is possible to further open the top cover 110.

In this embodiment, after opening the top cover 110 to a half-open angle as described above, when further opened, as shown in FIG. 8, the top cover 110 extends to the maximum opening angle with respect to the outer frame 100. In the open state, a stopper 180 in contact with the opening stop 150 (specifically, the second arm 170) is formed on the top cover 110 so that the top cover 110 is not opened any further. have.

The second arm 170, when the upper cover 110 is opened to the outer frame 100 in a state where the other elastic pressing means 145 is stretched to the end, does not reach the maximum opening angle (90 °), The second arm 170 rotates with respect to the top cover 110 and contacts the stopper 180 to open the top cover 110 to the maximum opening angle (90°).

When the top cover 110 is opened to the maximum opening angle (90°), as shown in FIG. ) is not open. In addition, while the top cover 110 rotates to the half-open angle, as shown in FIG. 7, the first arm 160 elastically presses the second arm 170, and the second arm 170 elastically presses the second arm 170. The side end (B) of is in contact with the stopper (180). Due to this, the urging force of the other urging means 145 as the first arm 160 is transmitted to the top cover 110 . In addition, the side end of the arm 170 and the stopper 180 do not come into contact while the rotation angle of the top cover 110 is from the half-open angle (FIG. 7) to 90° (FIG. 8).

(Action and effect of the opening and closing operation function of the top cover 110 in the opening device 8)

In this embodiment, by having the opening device 8 as described above, the actions and effects shown below are exhibited.

The opening stopper 150 according to this embodiment is connected to the first arm 160 rotatably connected to the outer frame 100 and to each of the first arm 160 and the top cover 110 rotatably. A second arm 170 is provided. The opening stopper 150 is formed so that the first arm 160 and the second arm 170 are folded when the top cover 110 is closed.

This makes it possible to accommodate and dispose the opening stopper 150 in a narrow space around the opening of the opening device 8.

In addition, in this embodiment, the locking mechanism 200 for locking the top cover 110 to the outer frame 100 in a state where the opening 3 is covered, and the operation unit 120 for unlocking the locking mechanism 200 are A pedal 130 and a link mechanism 210 are provided. And when the lock of the locking mechanism 200 is released by manipulation of the control unit 120, the top cover 110 is moved by the elastic pressing force of the elastic pressing means (elastic pressing means 140 and other elastic pressing means 145). It is designed to be open. For this reason, the locking mechanism 200 is locked by a person who is going to go in and out of the opening 3 by operating the operation unit 120 (including stepping on the pedal 130 with the front wheel 16b of the wheelchair 16). This is released so that the person can open the top cover 110 without lifting the top cover 110 with their hands.

Therefore, even if the strength of the hand is weaker than that of an average adult, such as an elderly person, a child, or a disabled person, the heavy top cover 110 can be opened without lifting it by hand, and the top cover 110 can open the lower floor through the open opening. so you can get in and out smoothly. As a result, it is possible to easily open the top cover 110 even in an emergency such as a fire, thereby facilitating evacuation in case of an emergency.

According to the present embodiment, in addition to the "elastic pressing means 140" that elastically presses the top cover 110 in the opening direction, the first arm 160 of the opening stopper 150 includes "other elastic pressing means" (145)". That is, the elastic pressing force for elastically pressing the top cover 110 in the opening direction can be obtained by two elastic pressing means, the elastic pressing means 140 and the other elastic pressing means 145. To achieve the corresponding elastic pressing force with one elastic pressing means, a large elastic pressing means for generating a large elastic pressing force is required, whereas the required elastic pressing means for generating a smaller elastic pressing force is provided to obtain the required elastic pressing force. It can be done.

In general, general-purpose products can be used as the elastic pressing means for generating a small elastic pressing force.

In addition, when the top cover 110 that closes the opening 3 formed in the floor or the like in a horizontal state from above is rotatably connected with a hinge or the like, the top cover 110 is placed at the center of rotation of the rotation shaft 112 of the hinge or the like. If you try to lift it by rotating it, the largest force is required because the weight of the upper cover 110 is usually applied when the upper cover 110 in the initial horizontal state is first lifted from the horizontal state in the initial state. And when the top cover 110 is opened to a certain angle, for example, to the vicinity where the top cover 110 becomes the half-open angle as described above, no particularly large force is required after that, and a small force be able to open up.

Therefore, the top cover 110 covering the opening 3 with two elastic pressing means (elastic pressing means 140 and other elastic pressing means 145) having a small elastic pressing force in a horizontal state is tilted at a predetermined angle (half When it is less than the opening angle), it is opened using the elastic pressing force of both of them. Thereafter, when the top cover 110 is opened to a predetermined angle (half-open angle) and a large elastic pressing force is not required, the elastic pressing force of one of the elastic pressing means 140 and the other elastic pressing means 145 open only with Therefore, it is possible to suppress the impact when the top cover 110 is opened to the maximum opening angle.

In this embodiment, in the second arm 170, the angle at which the top cover 110 is opened with respect to the outer frame 100 in a state in which the other elastic pressing means 145 is stretched to the end is at the maximum opening angle (90°). If not reached, the second arm 170 is formed to further open the top cover 110 to the maximum opening angle by pivoting with respect to the top cover 110 .

If the angle at which the top cover 110 is opened with respect to the outer frame 100 does not reach the maximum opening angle (90°) in a state where the other elastic pressing means 145 is fully stretched, the top cover 110 is the outer frame It is in a state of having an angle (opening) with respect to (100). In this state, the top cover 110 is elastically pressed in the opening direction by the elastic pressing force of the elastic pressing means 140 and rotates. At this time, since the second arm 170 is in a state where the other elastic pressing means 145 of the first arm 160 is stretched to the end, it is stretched by the first arm 160 (other elastic pressing means 145) and the second arm 160 is stretched. The arm 170 rotates relative to the top cover 110 . In a state in which the top cover 110 is open to the maximum opening angle (90 °) with respect to the outer frame 100, the second arm 170 contacts the stopper 180 so that the top cover 110 is no longer open By doing so, the rotation of the second arm 170 is stopped, and the opening of the upper lid 110 connected to the second arm 170 is stopped by stopping the rotation of the second arm 170 . Due to this, the opening is stopped while the top cover 110 is open to the maximum opening angle (90°).

In addition, the first axis (C), which is a connection between the first arm 160 and the outer frame 100, and the second axis (D), which is a connection between the second arm 170 and the connection bracket 113, the first The third axis E, which is a connecting portion between the arm 160 and the second arm 170, is not aligned in a straight line even when the top cover 110 is opened to the maximum opening angle. That is, the third shaft E is a first shaft C installed on the outer frame 100 side of the first arm 160 and a second shaft D installed on the top cover 110 side of the second arm 170. ), the first arm 160 and the second arm 170 are provided on the opposite side of the folded side (in this embodiment, the side closer to the rotating shaft 112 side of the top lid 110) with respect to the imaginary line connecting .

Due to this, when force is applied in the direction of closing the top cover 110 in a state where the top cover 110 is opened to the maximum opening angle, along a straight line connecting the second axis D and the first axis C A compressive force is applied, and the first arm 160 and the second arm 170 each rotate in a folding direction. Due to this, the top cover 110 rotates in the closed direction from the open state.

Next, the aforementioned locking mechanism 200 will be described in detail using FIGS. 9 to 26 .

(control unit 120)

When unlocking the locking mechanism 200, as shown in FIG. 9 , on the left edge side of the top cover 110, the end of the left and right pedals 130 is moved to the left and right front wheels 16b of the wheelchair 16. Step on from above to operate.

In this embodiment, the pedal 130 and the link mechanism 210 are provided as the operation part 120 for unlocking the locking mechanism 200 by operation.

As shown in FIGS. 10 and 11, the link mechanism 210 connects the two pedals 130 and the locking mechanism 200, and if the two pedals 130 are not operated together, the locking mechanism It is formed so that the lock of 200 is not released.

Here, as shown in FIG. 12, the pedal 130 has a pedal shaft 134 extending in the horizontal direction as a rotating shaft. Further, a link bar 132 that rotates around the pedal shaft 134 together with the pedal 130 at the edge side of the pedal shaft 134 (see Fig. 13) is formed in the horizontal direction. One end of this link bar 132 is connected to one end side of a link lever 220 described later. In addition, in this embodiment, the link lever 220 corresponds to "interlocking part".

As shown in FIG. 10, the link mechanism 210 is provided for each of the two pedals 130 described above, and the link bar 132 and the two pedals ( 130) is installed for each, and is connected to one end side of each link lever 220 at both ends of the link lever 220 that operates through the link bar 132 according to the operation of the pedal 130, and both pedals ( 130) has a rod-shaped (bar-shaped) operation unit 230 that unlocks the locking mechanism 200 when a predetermined amount of movement is performed.

As shown in FIGS. 10 and 11, the link bar 132 and the link lever 220 are installed on the left and right pedals 130, and both ends of the operation unit 230 are moved by the left and right link levers 220. connected, and a locking mechanism 200 is installed near the center of the corresponding operating part 230 .

As shown in FIG. 12 , the front wheel 16b of the wheelchair 16 contacts the free end of the pedal 130 in a state immediately before stepping on the pedal 130 . In that state, as shown in FIG. 13, when the front wheel 16b of the wheelchair 16 steps on the pedal 130, the pedal 130 rotates counterclockwise in FIG. 13 with the pedal shaft 134 as the center of rotation. By rotating in the rotational direction, the left free end side of the pedal 130 in Fig. 13 is pushed downward. Accordingly, the link bar 132 disposed inside the pedal 130 also moves downward.

The operation state of the link lever 220 corresponding to the operation state of the pedal 130 of FIGS. 12 and 13 will be described with reference to FIGS. 14 and 15 and FIGS. 24 and 25 .

In a state where the front wheel 16b shown in FIG. 12 is just before stepping on the pedal 130, the link bar 132 is located at substantially the same height as the shaft 222 (see FIG. 14). In this state, the link lever 220 rotating around the shaft 222 is in a state of inclining downward to the right as shown in FIG. 14, and the operating portion 230 of the link lever 220 is connected. The end of the side becomes a lowered position. Therefore, in this state, as shown in FIG. 24, the operation unit 230 also descends downward.

On the other hand, in a state where the front wheel 16b shown in FIG. 13 is stepping on the pedal 130, the link bar 132 moves to a position lower than the shaft 222 (see FIG. 14). As a result, the link lever 220 is in a state of inclining upward to the right as shown in Fig. 15, and the end of the link lever 220 on the side to which the operating portion 230 is connected is raised upward. Therefore, in this state, as shown in FIG. 25, the operation part 230 also rises upward.

(Lock Mechanism 200)

The locking mechanism 200 includes a locking portion 242 that can be locked with respect to a part of the outer frame 100 (specifically, the locking bar 101) and a locking portion installed on the upper cover 110 ( A locking member (first lock cam) capable of switching between a locked state in which the locking of the outer frame 100 of the 242 is maintained and an unlocked state in which the locking of the locking portion 242 in the outer frame 100 is released. (240)).

In addition, the locking mechanism 200 has a locked holding state in which the locking member 240 is maintained in a locked state and an unlocked holding state in which the locking member 240 is kept in an unlocked state according to the operation of the link mechanism 210. A switchable first state holding means is provided.

This 1st state holding means 252 prevents rotation of the 1st lock cam 240 in a locked state, and allows rotation of the 1st lock cam 240 according to the operation of the link mechanism 210. It has a second locking cam 250 that is rotatable between the allowable states to do.

In addition, the locking mechanism 200, when the first state maintaining means 252 is switched to the unlocked maintaining state, the second state maintaining means 262 that maintains the unlocked maintaining state regardless of the operation of the link mechanism 210 ) is provided.

This second state holding means 262 is a third lock cam (which prevents the second lock cam 250 from returning to the block state when the second lock cam 250 is rotated from the block state to the permitted state). 260).

In addition, the locking mechanism 200 will be described in detail.

As shown in FIG. 16 , the above-described locking bar 101 is a part of the outer frame 100 and is formed in the shape of a cylindrical rod protruding from the outer frame 100 in the horizontal direction.

The first locking cam 240 includes a concave groove-type locking portion 242 capable of locking the locking bar 101 provided on the outer frame 100.

In addition, this 1st locking cam 240 is formed so that it can rotate around the shaft 241 as the center of rotation, and by the tension spring 244 whose one end is connected to the above-mentioned 2nd locking cam 250, It is elastically pressed in a counterclockwise rotation direction.

Moreover, this 1st locking cam 240 has the projection part 245 which enters into the square concave part 264 mentioned later of the 3rd locking cam 260 as the above-mentioned 2nd state retaining means 262. When the protrusion 245 enters the square concave portion 264, the third locking cam 260 as the second state maintaining means 262 can be operated.

Moreover, this 1st lock cam 240 engages with the recessed part 253 of the 2nd lock cam 250 as a 1st state retaining means 252, and regulates the rotation of this 1st lock cam 240. A convex portion 243 is formed.

The 2nd locking cam 250 as the 1st state holding means 252 is formed so that it can rotate around the shaft 251 as a center of rotation, and engages the convex part 243 of the 1st locking cam 240 It has a concave portion 253 for stopping and regulating rotation of the first locking cam 240 to maintain a locked state.

Further, the second lock cam 250 has a square convex portion 254 protruding forward on the outer circumferential portion and regulating rotation of the third lock cam.

In addition, in the second locking cam 250, as the operating unit 230 moves upward, a protruding piece 255 that bounces upward and rotates the second locking cam 250 protrudes backward. has been

The third locking cam 260 as the second state holding means 262 is formed to be able to rotate around the shaft 261 as a center of rotation, and rotates counterclockwise in FIG. 16 by the torsion spring 263. It is elastically pressed in the direction. In addition, the third locking cam 260 is formed with a square concave portion 264 in which the projection 245 of the first locking cam 240 is recessed.

16 shows the locked state of the locking mechanism 200 .

In this embodiment, the force to open the upper lid 110 in a horizontal state is acted upon by the urging force of the urging means 140 and the other urging means 145 described in the opening device 8 described above, have.

Therefore, from the relationship between the lock bar 101 fixed to the outer frame 100 and the first lock cam 240 rotatably fixed to the top cover 110 via the shaft 241, the top cover By the elastic pressing force to open the 110, the top cover 110 moves in the opening direction, and the first locking cam 240 tries to rotate in the counterclockwise direction shown in FIG. However, the convex portion 243 of the first lock cam 240 is engaged with the concave portion 253 of the second lock cam 250, and the rotation of the first lock cam 240 in the counterclockwise direction is restricted. has been Therefore, the locking bar 101 is maintained in a locked state by the locking portion 242 . As a result, the locking state of the locking mechanism 200 is maintained.

When the pair of pedals 130 are simultaneously operated, the link bar 132 moves downward, and the link lever 220 rotating with the axis 222 as the center of rotation is inclined upward to the right, As shown in FIG. 17, the operating unit 230 connected to the right end also moves upward and bounces up.

As the operation unit 230 bounces up, the second locking cam 250 as the first state maintaining means 252 also bounces upward, and the second locking cam 250 as shown in FIG. 17 It rotates counterclockwise, and the convex portion 243 of the first locking cam 240 is pulled out from the concave portion 253 of the second locking cam 250 so that the first locking cam 240 rotates counterclockwise. become rotatable.

In addition, in a state in which the second lock cam 250 rotates counterclockwise ( FIG. 17 ), the square convex portion 254 of the second lock cam 250 protrudes from the third lock cam 260. By contacting the outer periphery, rotation of the second lock cam 250 in the clockwise direction (FIG. 17) is restricted.

For this reason, as shown in FIG. 18, the operation of the pedal 130 is finished, that is, the wheelchair 16 is retracted, the front wheel 16b is separated from the pedal 130, the link bar 132 is raised, and the link bar 132 is raised. Even when the lever 220 is inclined downward to the right (FIG. 18) and the operating portion 230 moves downward, the second lock cam 250 as the first state maintaining means 252 rotates clockwise (FIG. 18). 18) does not rotate and maintains the state in which rotation is regulated. Due to this, the convex portion 243 of the first lock cam 240 is maintained in a state where it is not engaged with the concave portion 253 of the second lock cam 250, and rotation of the first lock cam 240 It remains unregulated and free to rotate. For this reason, with the opening of the top cover 110, it is dragged by the locking bar 101 and receives the tension of the tension spring 244, so that the first locking cam 240 rotates counterclockwise as shown in FIG. rotate in the direction Then, as the first locking cam 240 rotates, the locking bar 101 is removed from the inside of the locking portion 242 and the top cover 110 is completely opened (lifted up).

In addition, as the first locking cam 240 rotates, the protrusion 245 rotates the third locking cam 260 clockwise. Due to this, the clockwise rotation restriction of the second lock cam 250 by the third lock cam 260 is released. Meanwhile, since the convex portion 243 of the first lock cam 240 contacts the outer periphery of the second lock cam 250, the clockwise rotation of the second lock cam 250 is maintained.

When the top cover 110 is closed, as shown in FIG. 20, when the top cover 110 is pressed down by a person's hand, the locking bar 101 locks the locking portion 242 of the first locking cam 240. ) Enter the interior and push up the top of the locking part 242. Due to this, the first locking cam 240 rotates clockwise in FIG. 20 .

When the first locking cam 240 rotates clockwise, the tension of the tension spring 244 causes the second locking cam 250 to rotate clockwise as shown in FIG. 21, as shown in FIG. 16 return to the locked state of

In the link mechanism 210 according to this embodiment, when the two pedals 130 and the locking mechanism 200 are connected, and the two pedals 130 are not operated together, the locking mechanism 200 is unlocked. It is formed so that it does not happen. A mechanism in which the locking mechanism 200 is not unlocked unless the two pedals 130 are operated together will be described.

Fig. 22 is a front view of the operation unit 230 in a state where two pedals 130 are being operated (dotted chain line) and a state where only one pedal (specifically, the left pedal) is being operated (solid line).

The state shown by the solid line in FIG. 22 is that only the left pedal 130 is being operated, and specifically, it is the state shown in FIGS. 23 and 26 .

In this way, when only the other pedal 130 is operated without operating both pedals 130 together, the operating unit 230 is in a state shown by a solid line in FIG. 22 . At the central position of the operating unit 230, the moving distance at which the operating unit 230 bounces upward is about half the distance (L/2) of the distance L when both pedals 130 are operated, It becomes half (L/2) of the predetermined amount of movement distance (L) required to release the locking state of the locking mechanism 200. In this case, as shown in FIG. 23, the bouncing of the operating part 230, that is, the upward movement distance becomes half of the usual, and it bounces until the bouncing piece 255 can be unlocked. can't climb As a result, rotation of the second locking cam 250 in the counterclockwise direction of FIG. 23 is insufficient. Even compared with the case of FIG. 17 , the amount of rotation of the second lock cam 250 is insufficient, so that the rotation restriction of the first lock cam 240 in the counterclockwise rotation direction is not released. In this way, the present embodiment is a mechanism in which the locked state of the locking mechanism 200 is not released unless the left and right pedals 130 are operated together, and malfunction can be prevented.

According to this embodiment, the pedal 130 is operated by stepping on the foot or by stepping on and operating the front wheel 16b of the wheelchair 16, through the link mechanism 210 connecting the pedal 130 and the locking mechanism 200. The locking mechanism 200 may be unlocked. And, when the lock of the locking mechanism 200 is released, the upper cover 110 can be opened in the opening direction by the elastic pressing force of the elastic pressing means (elastic pressing means 140 and other elastic pressing means 145). .

As a result, the user of the wheelchair 16 who cannot reach up to the top cover 110 on the floor to unlock the lock state with his or her own hands and lift the top cover 110 to open the leg or the wheelchair 16 The top cover 110 can be opened by operating the pedal 130 with the front wheel 16b or the like.

According to the present embodiment, only one link lever 220 is operated by operating the pedal 130 on one side, and only one of the both ends of the operating unit 230 moves. Because of this, it is not possible to secure a predetermined amount of movement of the operating portion 230, and the locking mechanism 200 is not unlocked.

In this way, the locking mechanism 200 is not unlocked unless the two pedals 130 are operated together. For this reason, even if one pedal 130 is manipulated by a child or the like, or one foot accidentally steps on one pedal 130, the locking mechanism 200 is not unlocked. Accordingly, it is possible to suppress the occurrence of mischief or malfunction by infants or the like, and it is possible to prevent accidental opening of the top cover 110 .

For this reason, even when a user of the wheelchair 16 cannot simultaneously operate the left and right pedals 130 with his or her hands or legs, the locking mechanism 200 can be easily unlocked and the top cover 110 opened. can be opened in either direction. As a result, the user of the wheelchair 16 can easily carry out an emergency evacuation, such as in a fire or earthquake, without assistance.

According to the present embodiment, the locking part 242 installed on the top cover 110, in the locking state, locks the locking bar 101 installed on the outer frame 100, so that the upper cover 110 locks the outer frame 100. ), and the locking mechanism 200 is in a locked state.

In addition, the locking part 242 installed on the top cover 110 does not lock the locking bar 101 in the unlocked state, so that the top cover 110 can be separated from the outer frame 100 and locked. The mechanism 200 is unlocked.

In addition, the locking mechanism 200 can maintain the locking state by the first state maintaining unit 252 maintaining the locking state.

Further, the second state maintaining means 262 prevents the second lock cam from returning to the blocking state regardless of the operating position of the pedal 130 when the second lock cam is rotated from the inhibited state to the permitted state. In this way, after the pedal 130 is operated to unlock the locked state, even if the hand, foot, or front wheel 16b is separated from the pedal 130 and the operation of the pedal 130 is stopped, the pedal 130 is released again It is possible to prevent the locking mechanism 200 from returning to the locked state by transitioning to the locked state.

According to the present embodiment, the first locking cam 240 has a locking portion 242 capable of locking a part of the outer frame 100, and locks and unlocks the locking portion 242 by rotating. can be changed.

In addition, the second locking cam 250 as the first state holding means 252 puts the locking portion 242 into a locked state by putting it into a blocking state in which rotation of the first locking cam 240 is prevented from the initial state, Rotation of the second locking cam 250 enables the first locking cam 240 to rotate.

Also, the rotatable third lock cam 260 as the second state maintaining means 262 is in the blocking state of the second lock cam 250 when the second lock cam 250 rotates from the blocking state to the permitted state. prevent the return of

In the above, preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, but the present disclosure is not limited to the above examples. It is clear that those of ordinary skill in the technical field to which this disclosure belongs can come up with various modifications or application examples within the scope of the technical idea described in the claims, and these are, of course, the technical scope of the present disclosure. is understood to belong to

In addition, the evacuation device 11 having the opening device 8 according to the first embodiment is applied not only to the wheelchair 16 as described above, but also to a stretcher used for a person with difficulty moving in the wheelchair 16 It is possible.

[Second Embodiment]

Next, the second embodiment will be described while appropriately citing FIGS. 27 to 41 . In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and detailed description is abbreviate|omitted. Hereinafter, differences from the first embodiment will be described.

In addition, in the description in this specification, the direction in which the outer frame 100 has the boarding edge 6 in plan view is referred to as "front", and the direction in which the outer frame 100 has the adjacent edge 7 is referred to as "width direction". In addition, the opposite side of "front" (the direction having the direction of the inside edge 7a) is set as "rear".

Fig. 27 is a perspective view showing the pedal 330, link mechanism 410, and lock mechanism 400 according to the second embodiment. As shown in Fig. 27, in the opening device 8 according to the second embodiment, the link mechanism 410 and the locking mechanism 400 are changed from the first embodiment, respectively.

(pedal 330 and link mechanism 410)

First, the configurations of the pedal 330 and link mechanism 410 according to the second embodiment will be described with reference to FIGS. 28 to 32 .

28 is a perspective view of the pedal 330 and the link mechanism 410 in a state in which the pedal 330 is not depressed, and FIG. 29 is a perspective view of the pedal 330 and the link mechanism in a state in which the pedal 330 is not stepped on ( 410), and FIG. 30 is a side view of the pedal 330 and the link mechanism 410 in a state in which the pedal 330 is stepped on.

The opening device 8 of this embodiment includes a pair of pedals 330 installed on the top of the top cover 110, locking mechanisms 400 provided on both sides of the rear side of the top cover 110 in the width direction, and the pedals. It has a link mechanism 410 connecting 330 and locking mechanism 400. As shown in FIG. 29, the pedal 330 is rotatably pivotally supported by the pedal shaft 334, and the front side can be stepped on by the front wheel 16b of the wheelchair 16, and the first link is on the rear side. It has a pin 336.

The link mechanism 410 includes an interlocking unit 420 that interlocks with the operation of the pedal 330, and an operating unit 430 that is connected to the interlocking unit 420 and transfers the operation of the pedal 330 to the locking mechanism 400. ) has The link mechanism 410 is capable of changing the state of the locking mechanism 400 to be described later into a locked state and an unlocked state according to the operation of the pedal 330 .

The pedal 330 includes a link portion 332 that interlocks with operation of the footrest portion 331 . In addition, the interlocking unit 420 includes a connecting unit 424 connected to the link unit 332 and operated directly, and a follower unit 520 connected to the connecting unit 424 and moved according to the amount of movement of the connecting unit 424. and an induction unit 550 for inducing the operation unit 430 in a direction to release the lock of the locking mechanism 400.

As shown in FIG. 28, the link portion 332 is connected to the first link cam 530 that rotates in the clockwise direction in the drawing according to the stepping operation amount of the pedal 330 and the first link cam 530. It is provided with the 2nd link cam 540 which moves linearly in the front-rear direction corresponding to the rotation of the 1st link cam 530.

As shown in FIGS. 28 and 29 , the pedal 330 is pivotally supported by the pedal shaft 334 . Further, the pedal 330 has a cylindrical first link pin 336 extending in the width direction on the rear side of the pedal shaft 334 . That is, when the front wheel 16b of the wheelchair presses the front side of the pedal 330, the first link pin 336 moves upward.

The 1st link cam 530 is pivotally supported by the link shaft 338 so that rotation is possible. Moreover, the 1st link cam 530 has the 1st long hole 534 and the 2nd long hole 542 in front and below the link shaft 338. In the first long hole 534, the first link pin 336 is rotatably inserted, and the second long hole 542 has a second link pin 532 installed behind and below the link shaft 338, which will be described later. It is rotatably inserted. That is, when the first link pin 336 moves upward, the first link cam 530 transmits motion to the second link pin 532 by rotating around the link shaft 338, have.

The second link cam 540 has a columnar second link pin 532 extending in the width direction on the front side, and the rear side is connected to the connecting portion 424 . Due to this, the second link cam 540 transmits the motion of the second link pin 532 to the connecting portion 424 .

Here, as shown in FIGS. 29 and 30 , when the first link pin 336 moves upward in response to the stepping of the pedal 330, the first link pin 336 moves through the first long hole 534 While pushing the side wall upward, it moves near the link shaft 338 of the first long hole 534. Due to this, the first link cam 530 rotates clockwise around the link shaft 338 in the drawing. And, the side wall of the second elongated hole 542, by drawing the second link pin 532 in the forward direction, the second link cam 540 can be drawn forward. That is, the rotational movement caused by stepping on the pedal 330 is converted into a linear movement in the forward and backward directions by the first link cam 530 and the second link cam 540 .

As the second link cam 540 moves in the forward direction, the connecting portion 424 connected to the rear end of the second link cam 540 also moves forward in this way.

The connection part 424 is connected to the rear side of each 2nd link cam 540, and is connected to the contact part 524 of the follower part 520 mentioned later. That is, the direct movement of the second link cam 540 is transmitted to the contact portion 524 of the follower 520 . In addition, the connecting portion 424 is provided with a return spring 425 for returning to a normal state.

Next, with reference to FIGS. 31 to 34 , the configurations of the interlocking unit 420 and the operating unit 430 according to the second embodiment will be described.

31 is a perspective view of the linkage unit 420 and the operation unit 430, and FIG. 32 is a plan view of the linkage unit 420 and the operation unit 430 in a state where the pedal 330 is not stepped on. 33 is a plan view in a state in which only one (right) pedal 330 is depressed, and FIG. 34 is a plan view in a state in which both pedals 330 are depressed.

As shown in FIGS. 31 and 32 , the interlocking part 420 has a follower part 520 and an induction part 550 . The follower 520 includes a long member 521 in the form of a grooved steel with the width direction of the opening device 8 as the longitudinal direction. At both ends of the elongated member 521, contact portions 524 connected to the connecting portion 424 are provided. Both ends of the elongate member 521 are movable in the moving direction of the connecting portion 424, that is, in all directions (predetermined direction in the present embodiment). The guide portion 550 is installed at a central position in the width direction on the rear side of the top cover 110 .

Here, the guide unit 550 according to the present embodiment includes a mounting unit 551, a fixed disc 552, a guide disc 554, and a support unit 555.

In the attaching portion 551, a guide hole 553 is formed at a central position in the width direction in the longitudinal direction in the front-rear direction. Further, a shaft for supporting the guide disk 554 is movably inserted into the guide hole 553. In addition, a pair of fixing discs 552 are attached to the attaching portion 551 outward in the width direction with respect to the guide disc 554 .

Further, an inner wire 434 to be described later is hung in a state of tension in the edge groove of the guide disc 554.

In addition, the pair of fixing disks 552 guide the inner wire 434 described later.

The support portion 555 is provided in the midway portion 522 at the center of the follower portion 520 in the width direction. This support portion 555 extends rearward, and a guide disc 554 is attached to its rear end. That is, the induction disk 554 moves in the forward and backward directions together with the middle portion 522 of the follower portion 520 .

As described above, since the guide hole 553 of the mounting portion 551 is formed with the longitudinal direction as the longitudinal direction, the axis of the guide disc 554 moves in the forward and backward direction along with the guide hole 553. Therefore, when the support part 555 installed at the middle part 522 of the follower part 520 moves, the middle part of the inner wire 434 of the operating part 430 is pulled forward by the guide disk 554. .

In addition, the guide disc 554 may be connected to the intermediate portion 522 of the follower portion 520 .

The operation part 430 has a pair of outer tubes 432, inner wires 434, and a connection part 436. The inner wire 434 is connected to a locking mechanism 400 described later by a connecting portion 436 . Moreover, the tension of the inner wire 434 is adjusted by the adjuster 402 (refer FIG. 36) installed in the locking mechanism 400.

The outer tube 432 is a flexible tubular body having incompressibility in the longitudinal direction, and is respectively disposed between a locking mechanism 400 described later and an attaching portion 551 .

The inner wire 434 is inserted through the inner side of the pair of outer tubes 432, while its middle part is caught by the guide disk 554 and the pair of fixing disks 552, respectively.

The connecting portion 436 is provided on both ends of the inner wire 434 to connect the pair of locking mechanisms 400 and the inner wire 434 .

Here, as in the state shown in FIG. 33, when both pedals 330 are stepped on, the follower 520 moves the elongated member 521 as a whole because the contact portions 524 at both ends move in the forward direction. will move in the direction

In this case, the guide disc 554 connected to the support part 555 moves forward along with the movement of the long member 521 of the follower part 520 . In addition, the movement distance of the middle part 522 of the follower part 520 in this case is L.

As the middle part 522 of the follower 520 moves forward by the moving distance L, the middle part of the inner wire 434 of the operation part 430 is pulled forward by the guide disc 554. Due to this, the connection portion 436 at both ends of the inner wire 434 is pulled.

Also, as shown in FIG. 34 , when only one side of the pedal 330 is stepped on, since the corresponding contact portion 524 moves forward, one side of the elongated member 521 tilts forward.

In this case, when the long member 521 tilts, the guide disk 554 moves forward. However, the amount of movement of the middle portion 522 of the follower portion 520 is L/2, which is approximately half of the case where both pedals 330 are stepped on.

Therefore, the amount by which the middle part of the inner wire 434 of the operating part 430 is pulled by the induction disc 554, that is, the amount of movement of the connection part 436 is approximately half of that when both pedals 330 are stepped on. .

(Lock Mechanism 400)

Subsequently, the locking mechanism 400 according to this embodiment will be described with appropriate reference to FIGS. 35 to 41 . In addition, the locking bars 101 are installed on both sides in the width direction of the outer frame 100, and a pair of locking mechanisms 400 are installed on both sides in the width direction on the inner surface of the top cover 110, but in the following Let me explain only one side.

Fig. 35 is a partial perspective view of the locking mechanism 400, and Figs. 36 to 41 are partial longitudinal sectional views of the locking mechanism 400 showing the case where the locking mechanism 400 is in a locked state and an unlocked state.

Fig. 36 is a cross-sectional side view of the locking mechanism 400, and the left side of the drawing is "outside in the width direction" of the opening device 8. The lock mechanism 400 includes a lock cam support member 480, a lock member (first lock cam 440) supported by the lock cam support member 480, and a first state retaining means (second lock cam ( 450), and an elastic pressing member (extension spring 460) serving as a second state maintaining means.

The lock cam support member 480 has a shaft 441 on which the first lock cam 440 is pivotally supported, and a shaft 451 on which the second lock cam 450 is pivotally supported. Further, the shaft 451 is provided on the inside of the opening device 8 in the width direction from the shaft 441 . In addition, the lock cam support member 480 is formed with a first guide portion 484 and a second guide portion 485 which are long holes. The lock cam support member 480 has an upper portion fixed to the inside of the upper cover 110 (ie, the lower surface side of the upper cover 110).

The first guide portion 484 is formed in an arc shape outside the shaft 441 in the width direction, and is notched downward at the lower end of the arc shape. The arcuate portion of the first guide portion 484 has a concentric rim with respect to the shaft 441, and the first hook portion 449 installed on the first lock cam 440 to be described later is attached to the first lock cam. It is guided with the meeting of (440).

In addition, the upper end of the first guide part 484 is formed to the same height as the shaft 451 . That is, when the locking mechanism 400 is in a locked state, it is preferable that the first hook portion 449 is positioned at the same height as the shaft 451 .

The second guide portion 485 is a long hole formed in an arcuate shape on the inner side of the shaft 451 in the width direction. The second guide part 485 has a concentric rim with respect to the shaft 451, and a second hook part 459 installed on the second lock cam 450, which will be described later, is attached to the second lock cam 450. Guide with rotation.

In addition, the second guide portion 485 has holes extending upward and downward with respect to the shaft 451 .

The first locking cam 440 includes a first hook portion 449, a locking portion 442, a first concave portion 446, a second concave portion 447, and a first concave portion 446. ) and a sliding portion 448 installed between the second concave portion 447. The first locking cam 440 is rotatably supported by the shaft 441 .

35 and 36, the first hook portion 449 is positioned outside and above the shaft 441 in the width direction in the locked state. The first hook portion 449 is, for example, a cylindrical member extending in a direction orthogonal to the width direction, that is, in the front-back direction, and is inserted through the first guide portion 484 . In addition, the 1st hook part 449 may be integrally formed with the 1st locking cam 440, and may be made separately.

As shown in Fig. 36, the first concave portion 446 engages the convex portion 456 of the second lock cam 450 described later in the locked state. Further, the second concave portion 447 engages the convex portion 456 of the second lock cam 450 in an unlocked state as shown in FIG. 39 .

The sliding portion 448 has a curved surface that allows the first lock cam 440 to rotate in a state where the convex portion 456 of the second lock cam 450 is brought into contact with it.

The locking portion 442 is a long hole in which the outside of the first locking cam 440 in the width direction is opened in the locked state, and locks the locking bar 101 in the locked state.

As shown in FIGS. 35 and 36 , the second locking cam 450 has a second hook portion 459 and a convex portion 456 . The 2nd locking cam 450 is pivotally supported by the shaft 451 from the inside in the width direction with respect to the 1st locking cam 440 so that rotation is possible.

As shown in Fig. 35, the second hook portion 459 is located on the inside and below the shaft 451 in the width direction in the locked state. The second hook portion 459 is, for example, a cylindrical member extending in a direction orthogonal to the width direction, that is, in the front-back direction, and is inserted into the second guide portion 485 formed in the lock cam support member 480. . In addition, the 2nd hook part 459 may be integrally formed with the 2nd locking cam 450, and may be made separately.

Further, as shown in FIG. 36 , the second locking cam 450 is connected to the connecting portion 436 of the operating portion 430 below the shaft 451 . That is, when the inner wire 434 of the operation unit 430 is pulled, the second locking cam 450 rotates counterclockwise in the drawing.

Further, as shown in Fig. 36, the first hook portion 449 and the second hook portion 459 are elastically pressed in the direction of approaching each other by a tension spring 460 as an example of the urging member. Specifically, one end side of the tension spring 460 is caught on the first hook portion 449 of the first lock cam 440, and the other end side of the tension spring 460 is the second hook of the second lock cam 450. It hangs on the part 459.

In addition, in the state shown in FIG. 36, the tension spring 460 elastically presses the first hook part 449 and the second hook part 459 in a direction closer to each other in a state located lower than the shaft 451. . That is, rotation of the second lock cam 450 is suppressed by being elastically pressed in a clockwise rotation direction.

Next, the operation of the locking mechanism 400 according to the present embodiment and the change of locked and unlocked states will be described.

As shown in FIG. 36 , when the lock mechanism 400 according to this embodiment is in a locked state, the lock bar 101 is engaged with the first lock cam 440 . Accordingly, the opening of the top cover 110 is restricted unless the first locking cam 440 rotates.

In addition, rotation of the first lock cam 440 is suppressed by the second lock cam 450 , and rotation of the second lock cam 450 is suppressed by the tension spring 460 . That is, in the present embodiment, this state corresponds to a "preventing state" in which rotation of the first lock cam 440 is prevented.

Here, as shown in FIG. 37, when both front wheels 16b of the wheelchair 16 step on the above-described pedal 330, the inner wire 434 of the operating unit 430 is pulled inward in the width direction to control 2 The locking cam 450 rotates counterclockwise in the drawing. And in this state, the 1st lock cam 440 can rotate without being suppressed by the 2nd lock cam 450. That is, the lock of the locking mechanism 400 is released.

37, when the second locking cam 450 rotates, the second hook portion 459 moves upward in the width direction with respect to the shaft 451, and the second locking cam 450 rotates. allowed That is, in the present embodiment, this state corresponds to a “allowed state” in which rotation of the first lock cam 440 is allowed.

In the locking mechanism 400 according to the present embodiment, the tension spring 460 is positioned with the axis 451 therebetween with respect to the position in the blocking state, and the position of the extension spring 460 in the blocking state. Moving in the opposite direction, the tension spring 460 continues to elastically press the first hook portion 449 and the second hook portion 459 in a direction closer to each other. For this reason, rotation of the second lock cam 450 in the clockwise direction in the drawing, which is the reverse direction, is suppressed, and the state rotated clockwise from the initial state is maintained.

Therefore, the second locking cam 450, once changed to the unlocked state, is prevented from returning to the state shown in FIG. 36 by the tension spring 460 even when both of the depressed pedals 330 return to their original state 37 is maintained.

Subsequently, when the front wheel 16b of the wheelchair 16 is removed from the pedal 330 and the load on the top lid 110 is removed, as shown in FIG. 38, similarly to the opening device 8 according to the first embodiment , The upper cover 110 is rotated in a direction in which the opening is performed by the elastic pressing means 140.

In this case, the first locking cam 440 moves upward while being rotated counterclockwise in the drawing by the locking bar 101 fixed to the outer frame 100. Due to this, the locking bar 101 is removed from the engaging portion 442 of the first locking cam 440.

Further, in a state in which the first locking cam 440 rotates counterclockwise in the drawing, the first hook portion 449 also moves downward. Due to this, the tension spring 460 connecting the first hook portion 449 and the second hook portion 459 is located below the locking shaft of the second locking cam 450, and the tension spring 460 ) The second hook portion 459 rotates the second locking cam 450 clockwise by the elastic pressing force of the drawing.

Also, in the state where the locking bar 101 is removed from the first locking mechanism 400, the convex portion 456 of the second locking cam 450 engages the second concave portion 447 of the first locking cam 440. become customized. Also, the postures of the first locking cam 440 and the second locking cam 450 are maintained by the elastic pressing force of the tension spring 460 .

Subsequently, as shown in FIG. 39 , when the top cover 110 is rotated in the closing direction, first, the locking bar 101 contacts the locking portion 442 of the first locking cam 440 . In this state, when the upper cover 110 is further rotated in the closing direction, the first locking cam 440 is rotated clockwise by the locking bar 101 in the drawing.

When the top cover 110 is further rotated in the closing direction, as shown in FIG. 40 , the locking bar 101 rotates the first locking cam 440 clockwise in the drawing. In this state, the first hook part 449 and the second hook part 459 rotate the first locking cam 440 counterclockwise and the second locking cam 450 clockwise by the tension spring 460. It is elastically pressurized in the direction of rotation in the direction.

Here, the first locking cam 440 is such that the convex portion 456 of the second locking cam 450 contacts the sliding portion 448 of the first locking cam 440 and rotates clockwise in the drawing. have. As a result, the first locking cam 440 rotates without being suppressed.

When the top cover 110 is completely closed, the first locking cam 440 rotates to an angle similar to that in FIG. 36 . That is, the locking bar 101 is stopped by the locking part 442 .

Moreover, the convex part 456 of the 2nd lock cam 450 slides the sliding part 448 of the 1st lock cam 440, and then engages with the 1st concave part 446 again. Due to this, the second lock cam 450 rotates to an angle similar to that in FIG. 36 . Accordingly, the rotation of the first lock cam 440 is suppressed again by the second lock cam 450 and changes to the "restrained state".

36, when only one pedal 330 is operated as described above, as shown in FIG. It does not fall out of the first concave portion 446 of the That is, since the second locking cam 450 does not change to the permitted state, the first locking cam 440 does not rotate.

And, in the state shown in FIG. 41, when the pedal 330, which is operated on one side, is returned to its original state (the front wheel 16b of the wheelchair 16 is removed from the pedal 330), the second locking cam 450 ) is tensioned by the tension spring 460. Due to this, the second locking cam 450 returns to the state shown in FIG. 36 .

(action and effect)

Next, actions and effects of the link mechanism 410 and the locking mechanism 400 according to this embodiment are described.

First of all, by the link mechanism 410 according to the present embodiment, the movement distance of the guide disk 554 and the connecting portion 436 when only one pedal 330 is depressed is the movement when both pedals 330 are depressed. It becomes L/2, which is half of the distance.

That is, the amount of movement of the induction disk 554 and the connecting portion 436 can be changed depending on whether one pedal 330 is stepped on or both pedals 330 depressed.

For this reason, the movement amount of the induction disc 554 and the connecting portion 436 when only one pedal 330 is pressed is set to an amount that does not exceed the predetermined amount, and the induction disc 554 when both pedals 330 are pressed And the movement amount of the connection part 436 can be set to be more than a predetermined amount.

In this way, also in the link mechanism 410 and lock mechanism 400 according to the present embodiment, as in the link mechanism 410 and lock mechanism 400 according to the first embodiment, when both pedals 330 are stepped on When the upper cover 110 is unlocked, the unlocked state, and when only one step on the pedal 330 is performed, a configuration in which the upper cover 110 is maintained in a locked state in which the lock is not released can be obtained.

Further, the locking mechanisms 400 according to the present embodiment are provided on both sides in the width direction from the inside of the top cover 110, respectively. Therefore, the locking bar 101 is fixed to the side of the adjacent rim 7 adjacent to both outer sides of the boarding edge 6, not to the side of the boarding edge 6 serving as the boarding gate.

By using the link mechanism 410 and the lock mechanism 400 according to the present embodiment, the degree of freedom in design on the boarding edge 6 side is improved with respect to the link mechanism 410 and the lock mechanism 400 according to the first embodiment. In addition, an effect of preventing the evacuee from contacting the locking bar 101 when getting on the platform 5 can be obtained.

(modified example)

Further, modifications of the link mechanism 410 and the locking mechanism 400 according to the present embodiment will be described.

In the above description, the pedal 330 and the follower 520 are indirectly connected via the connecting portion 424, but the link mechanism 410 according to this embodiment is not limited to this. For example, you may connect the pedal 330 and the follower part 520 directly, without providing the connection part 424.

Further, the operating portion 430 in the link mechanism 410 pulls the lock member 440 of the lock mechanism 400 by pulling the inner wire 434 and rotates it, but the link mechanism 410 according to the present embodiment ) is not limited thereto. For example, even if the operating unit 430 is a rod-like member and the driven member 520 moves by a predetermined amount, the rod-like member moves outward in the width direction and presses the second lock cam 450 to rotate it. good night.

In addition, in the above description, a pair of locking mechanisms 400 are provided on both sides in the width direction, but the locking mechanism 400 according to this embodiment is not limited to this. According to the specifications of the opening device 8, one or a plurality of locking mechanisms 400 can be properly disposed relative to the top cover 110. For example, a total of three locking mechanisms 400, one in all directions in addition to both sides in the width direction, can be disposed.

Also, three or more locking mechanisms 400 may be provided. For example, the opening device 8 is a locking mechanism ( 400), you may provide three or more locking mechanisms 400.

Further, in the above description, the middle portion 522 is the center of the follower portion 520 in the width direction, but the middle portion 522 according to the present embodiment is not limited to this. That is, it may be positioned between the pair of contact portions 524, and may be provided at a location away from the center of the follower portion 520 in the width direction according to the specifications of the opening device 8.

Further, in the above description, the contact portion 524 is the both ends of the follower portion 520, but the contact portion 524 according to the present embodiment is not limited to this. That is, the intermediate portion 522 may be interposed in a state of being spaced apart from each other in the width direction of the follower portion 520, and installed at a location away from both sides of the follower portion 520 in the width direction according to the specifications of the opening device 8. It may be.

Also, in the above description, the operation unit 430 is composed of a pair of outer tubes 432 and one inner wire 434 inserted through the pair of outer tubes 432, but the operation according to the present embodiment Unit 430 is not limited thereto. For example, it is good also as a mechanism which provides a pair of inner wires 434 and unlocks the locking mechanism 400 of both left and right sides by each inner wire 434.

In addition, the operation unit 430 included in the opening device 8 according to the present embodiment is not limited to one. For example, for a pair or three or more locking mechanisms 400, a mechanism in which a plurality of operation parts 430 are arranged in parallel and the guide disk 554 pulls each operation part 430 with one operation. can be done with

As another example, a plurality of operation parts 430 may be arranged in parallel to one locking mechanism 400, and each operation part 430 may be pulled by the guide disk 554 with one operation. .

On the other hand, "simultaneously" does not have to be perfectly matched timing as long as it is a timing during pedal operation.

In the above, the first embodiment and the second embodiment of the present disclosure have been described with reference to the accompanying drawings, but those skilled in the art to which the present disclosure belongs, within the scope of the technical idea described in the claims, various It is clear that modifications or application examples can be conceived, and it is understood that these also naturally fall within the technical scope of the present disclosure.

The present disclosure can be used as an opening device such as an evacuation hatch or a hatch installed in a corridor, a veranda, a roof, or the like of a building.

Claims (9)

An outer frame having an opening through which people can enter and exit;
An upper cover having one end side pivotally supported by the outer frame to cover the opening;
A locking mechanism for locking the upper cover to the outer frame in a state in which the opening is covered;
A pedal installed on the top cover;
a link mechanism that connects the pedal and the locking mechanism and unlocks the locking mechanism by operating the pedal;
An opening device having an elastic pressing means for rotating the top cover in an opening direction when the locking mechanism is unlocked by operation of the pedal. The method of claim 1,
The link mechanism,
An interlocking part interlocked with the operation of the pedal;
and an operating unit that unlocks the locking mechanism when the pedal is moved by a predetermined amount without unlocking the locking mechanism when the movement amount does not reach a predetermined amount. The method of claim 2,
Two pedals are installed on the top cover,
wherein, in the operation unit, when one of the two pedals is operated, the movement amount does not reach the predetermined amount, and when the two pedals are operated together, the movement amount is equal to or greater than the predetermined amount. The method of claim 3,
The interlocking part,
a follower to which the pedal is directly or indirectly connected at a contact portion spaced apart from each other and to which the corresponding contact portion moves in the predetermined direction by operation of the pedal;
A guide portion connected to a middle portion between the two contact portions in the follower portion and guiding the operating portion in a direction for unlocking the locking mechanism when the middle portion moves in the predetermined direction. opening device. The method of claim 4,
the operating portion is connected to a plurality of the locking mechanisms;
wherein the guide portion guides the operation portion to simultaneously unlock each of the locking mechanisms. According to claim 1, 2, 3, 4 or 5,
The locking mechanism is
A locking portion capable of locking with respect to the outer frame;
A locking member installed on the top cover, capable of switching between a locked state in which the locking part is maintained on the outer frame and an unlocked state in which the locking part is released from the outer frame. Wow,
first state maintaining means capable of switching between a locked state of maintaining the locked state of the lock member and an unlocked state of maintaining the unlocked state of the lock member according to an operation of the link mechanism;
and second state holding means for maintaining the unlocked holding state regardless of the operation of the link mechanism when the first state holding means is switched to the unlock holding state. The method of claim 6,
The locking mechanism is
a first locking cam as the locking member having the locking portion and being capable of changing the locking state and the unlocking state of the locking portion by rotating;
The first state holding means is rotatable between a blocking state in which rotation of the first lock cam is prevented in the locked state and a permitted state in which rotation of the first lock cam is allowed in accordance with the operation of the link mechanism. 2 locking cams,
wherein the second state retaining means suppresses the return of the second lock cam to the impeded state when the second lock cam is rotated from the impeded state to the permitted state. The method of claim 7,
and the second state retaining means is an urging member connected to the first lock cam and the second lock cam. According to claim 1, 2, 3, 4, 5, 6, 7 or 8,
An opening device having an evacuation device that is wholly or partially housed in an outer frame.

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