CN115348887A

CN115348887A - Opening device

Info

Publication number: CN115348887A
Application number: CN202180025223.1A
Authority: CN
Inventors: 城户宪昌; 藤谷哲也; 寺冈宗浩
Original assignee: Nagar Industrial Co ltd
Current assignee: Nagar Industrial Co ltd
Priority date: 2020-03-30
Filing date: 2021-03-30
Publication date: 2022-11-15
Also published as: WO2021201068A1; JPWO2021201068A1; KR20220155390A

Abstract

The opening device is provided with: a locking mechanism for locking the upper cover to the outer frame; a pedal arranged on the upper cover; and a link mechanism for releasing the lock of the lock mechanism by operating the pedal. The lock mechanism includes: a locking portion that can be locked to the outer frame; a locking member that can switch between a locked state in which the locking portion is held to the outer frame and an unlocked state in which the locking portion is released from locking the outer frame; a first state maintaining mechanism capable of switching between a lock maintaining state for maintaining a locked state of the lock member and an unlock maintaining state for maintaining an unlocked state of the lock member in association with an operation of the link mechanism; and a second state maintaining mechanism that maintains the unlock maintaining state regardless of the operation of the link mechanism when the first state maintaining mechanism is switched to the unlock maintaining state.

Description

Opening device

Technical Field

The present disclosure relates to an opening device.

Background

An opening device that allows people to enter and exit, such as a hoistway, and an escape hatch used in emergency escape such as fire is provided on a roof, a balcony, or the like of a building such as a public facility or apartment. The opening device is provided with an upper cover which normally blocks the opening so that a person does not fall or come in and out.

Further, as an evacuation device provided in an opening device with a lid, a rescue bag, a foldable ladder, and a device similar to a vertically-descending elevator have been studied.

When such an opening device is installed in a place where an infant is expected to reach, the infant may open the upper cover to mischief the infant.

Therefore, there has been studied an opening device capable of reliably preventing the opening of the upper cover by the lifting force due to insufficient strength of the child, improving safety, and allowing the opening of the upper cover by the lifting force of an ordinary adult except for the child, and capable of quickly opening the upper cover during emergency evacuation (see japanese patent application laid-open No. 11-290470).

Disclosure of Invention

Problems to be solved by the invention

However, there are problems as follows: it is not easy for the elderly, physically handicapped, and particularly for the wheelchair user to open the upper cover by pulling the upper cover with a pulling force equal to or greater than a set value for releasing the locked state while stretching the upper cover to the upper cover. In addition, when the opening is large, if the upper lid is large in size and the weight of the entire upper lid is also large, the lifting becomes more difficult.

The present disclosure provides an opening device, which can simply open an upper cover without extending hands to the upper cover positioned on a floor surface and using own hands to unlock the upper cover.

Means for solving the problems

In order to solve the above problem, the opening device according to claim 1 includes: an outer frame having an opening through which a person can enter and exit; an upper cover, one end of which is rotatably supported by the outer frame, and which can block the opening; a locking mechanism for locking the upper cover to the outer frame in a state of closing the opening; a pedal provided on the upper cover; a link mechanism that connects the pedal and the lock mechanism, and releases the lock of the lock mechanism by operating the pedal; and an urging mechanism that rotates the upper cover in an opening direction when the lock of the lock mechanism is released in accordance with the operation of the pedal.

According to claim 1, the upper cover is provided with a pedal that is operated to release the lock of the lock mechanism via the link mechanism. By operating the pedal by stepping on it or by stepping on it with the front wheel of the wheelchair in the case of a wheelchair, the lock of the lock mechanism can be released via a link mechanism connecting the pedal and the lock mechanism. Further, if the lock of the lock mechanism is released, the upper cover can be opened in the opening direction by the biasing force of the biasing mechanism.

Thus, a user of the wheelchair, who cannot reach the upper cover positioned on the floor surface with his or her hands to release the locked state and lift and open the upper cover, can open the upper cover by operating the pedals with his or her feet, the front wheels of the wheelchair, and the like.

An opening device according to claim 2 is the opening device according to claim 1, wherein the link mechanism includes: an interlocking part interlocked with the operation of the pedal; and an operating unit that does not unlock the lock mechanism when the amount of movement is less than a predetermined amount due to operation of the pedal, and unlocks the lock mechanism when the amount of movement is moved by the predetermined amount.

According to claim 2, the interlocking part of the link mechanism operates according to the operation of the pedal. When the pedal is operated and the link mechanism is moved by a predetermined amount, the operating portion connected to the link mechanism releases the lock of the lock mechanism. Thus, the lock of the lock mechanism can be released by the operation of the pedal via the link mechanism and the operating portion.

The opening device according to claim 3 is the opening device according to claim 2, wherein two of the pedals are provided on the upper cover, and the operation portion has a movement amount less than the predetermined amount when one of the two pedals is operated, and has a movement amount equal to or greater than the predetermined amount when both of the two pedals are operated.

According to claim 3, two pedals are provided at the end edge of the upper cover, and if both of the pedals are not operated, the amount of movement of the operating portion of the link mechanism is less than a predetermined amount. In this way, by making the amount of movement of the operating portion less than the predetermined amount if both the pedals are not operated, even if one pedal is operated or one pedal is accidentally stepped on by one foot due to mischief such as a young child, the lock of the lock mechanism is not released. This can prevent mischief, erroneous operation, and the like of the child and the like, and prevent the upper cover from being opened by mistake.

The opening device according to claim 4 is the opening device according to claim 3, wherein the interlocking section includes: a driven part which is directly or indirectly connected to the pedals at mutually separated connecting parts and moves the corresponding connecting part to a preset direction by the operation of the pedals; and a guide portion that is connected to a middle portion between the two connected portions of the driven portion, and that guides the operating portion in a direction in which the lock mechanism is released when the middle portion moves in the predetermined direction.

According to claim 4, the link mechanism moves the driven portion in accordance with the operation of the pedal, and pulls the working portion in accordance with the amount of movement of the driven portion. Thereby, the following link mechanism is provided: if the two pedals are not uniformly operated, the moving amount of the working part is less than a preset amount.

An opening device according to claim 5 is the opening device according to claim 4, wherein the operating portion is connected to a plurality of the lock mechanisms, and the guide portion guides the operating portion to simultaneously unlock the lock mechanisms.

According to the 5 th aspect, the operating portion is connected to the plurality of lock mechanisms, and when the guide portion moves in the predetermined direction, the plurality of lock mechanisms are unlocked. Thereby, a mechanism of the operating portion for releasing the lock of the lock mechanism is provided.

The opening device according to claim 6 is the opening device according to any one of claims 1 to 5, wherein the lock mechanism includes: an engaging portion (specifically, a locking claw) that can be engaged with the outer frame (specifically, a locking lever); a locking member (e.g., a first locking cam) provided in the upper cover and capable of switching between a locked state in which the locking portion is held in the housing and an unlocked state in which the locking portion is released from locking the housing; a first state maintaining mechanism capable of switching between a lock maintaining state in which the lock state of the lock member is maintained and an unlock maintaining state in which the unlock state of the lock member is maintained in association with the operation of the link mechanism; and a second state maintaining mechanism for maintaining the unlock maintaining state regardless of the operation of the link mechanism when the first state maintaining mechanism is switched to the unlock maintaining state.

According to the 6 th aspect, the locking portion provided in the upper cover locks a part of the outer frame (specifically, the locking lever) in the locked state, so that the upper cover cannot be separated from the outer frame, and the locking mechanism is in the locked state.

Further, the locking portion provided in the upper cover does not lock a part of the outer frame in the unlocked state, and the upper cover is in a state in which it can be separated from the outer frame, and is in an unlocked state in which the lock of the lock mechanism is released.

In addition, the first state maintaining mechanism maintains the above-described locked state, so that the locking mechanism can maintain the locked state.

Further, the second state maintaining mechanism maintains the unlock maintaining state regardless of the operation of the link mechanism when the first state maintaining mechanism is switched to the unlock maintaining state, so that even if the pedal is operated and the hand, foot, front wheel, etc. are separated from the pedal to stop the operation of the pedal after the locked state is switched to the unlocked state, the lock mechanism can be prevented from moving from the unlocked state to the locked state again and returning to the locked state.

An opening device according to claim 7 is the opening device according to claim 6, wherein the lock mechanism includes a first lock cam as the lock member, the lock member includes the engagement portion, and the locked state and the unlocked state of the engagement portion can be changed by rotation, the first state maintaining mechanism is a second lock cam rotatable between a blocking state in which rotation of the first lock cam is blocked in the locked state and a permitting state in which rotation of the first lock cam is permitted in association with operation of the link mechanism, and the second state maintaining mechanism suppresses return of the second lock cam to the blocking state when the second lock cam rotates from the blocking state to the permitting state.

According to claim 7, the first lock cam includes an engagement portion that can engage a part of the outer frame, and the lock state and the unlock state of the engagement portion can be changed by rotating.

The second lock cam as the first state maintaining mechanism is in a blocking state in which the rotation of the first lock cam is blocked to bring the locking portion into the locked state, and the second lock cam is rotated in accordance with the operation of the link mechanism to bring the second lock cam into an allowing state in which the rotation of the first lock cam is allowed, thereby allowing the rotation of the first lock cam.

In addition, the second state maintaining mechanism prevents the second lock cam from returning to the prevention state when the second lock cam rotates from the prevention state to the permission state.

The opening device according to claim 8 is the opening device according to claim 7, wherein the second state maintaining mechanism is a biasing member coupled to the first lock cam and the second lock cam.

According to the 8 th aspect, the urging member suppresses the return from the permission state to the prevention state. Thus, a mechanism is provided in which, when the second lock cam is in the permission state, the return to the prevention state is suppressed by the urging member.

The opening device according to claim 9 is the opening device according to any one of claims 1 to 8, wherein a refuge device (e.g., a folding ladder, a rescue bag, etc.) is provided which is entirely or partially housed in the outer frame.

According to the 9 th aspect, the refuge device is provided which is entirely or partially housed in the outer frame. Thus, the upper frame is opened with respect to the outer frame, and the evacuation device can be used to evacuate downstairs.

Drawings

Fig. 1A is an overhead view of the state in which the opening device of the first embodiment is installed, as viewed from obliquely above.

Fig. 1B is an overhead view of the state in which the opening device of the first embodiment is installed, as viewed obliquely from below.

Fig. 2 is a diagram showing the operation of the evacuation device according to the first embodiment, and is a side view showing a state in which the elevating platform is at the standby position.

Fig. 3 is a plan view of the evacuation device of the opening device of the first embodiment.

Fig. 4A is a plan view showing the opening device of the first embodiment.

Fig. 4B is a partially enlarged plan view showing the opening/closing portion in fig. 4A in an enlarged manner.

Fig. 5 is a longitudinal sectional view showing the opening device of the first embodiment.

Fig. 6 is a partially enlarged vertical cross-sectional view showing a state where the upper lid of the opening device of the first embodiment is closed.

Fig. 7 is a partially enlarged vertical cross-sectional view showing a state where the upper cover of the opening device of the first embodiment is opened to a half-open angle.

Fig. 8 is a partially enlarged longitudinal sectional view showing a state where the upper cover of the opening device of the first embodiment is opened to 90 °.

Fig. 9 is a side view and a partially enlarged side view showing a state in which a wheelchair user operates a pedal for the hatch device of the first embodiment.

Fig. 10 is a plan view showing a lock mechanism and a link mechanism of the opening device according to the first embodiment.

Fig. 11 is a front view showing a lock mechanism and a link mechanism of the opening device according to the first embodiment.

Fig. 12 is a partial vertical cross-sectional view of the opening device of the first embodiment in a state immediately before the pedals of the front wheel of the wheelchair are stepped on.

Fig. 13 is a partial vertical cross-sectional view of the shedding device of the first embodiment, showing a state where the front wheel of the wheelchair steps on the pedals.

Fig. 14 is a side view of the link of the hatch frame of the first embodiment before the pedal is depressed by the front wheel of the wheelchair.

Fig. 15 is a side view of a link of the shedding device of the first embodiment in a state where a front wheel of the wheelchair steps on a pedal.

Fig. 16 is a partial longitudinal cross-sectional view of the shedding device according to the first embodiment, showing a locked state of the lock mechanism before the front wheel of the wheelchair steps on the pedal.

Fig. 17 is a partial longitudinal sectional view of a lock mechanism of the shedding device of the first embodiment in a state where a front wheel of the wheelchair has stepped on a pedal.

Fig. 18 is a partial longitudinal cross-sectional view of the lock mechanism of the opening device of the first embodiment in a state where the front wheel is separated from the upper cover.

Fig. 19 is a partial longitudinal cross-sectional view of the lock mechanism in a state where the upper cover is opened in the opening device of the first embodiment.

Fig. 20 is a partial longitudinal cross-sectional view of the lock mechanism in a state where the upper cover is closed in the opening device of the first embodiment.

Fig. 21 is a partial longitudinal sectional view of the lock mechanism of the opening device of the first embodiment in a state where the upper cover is locked.

Fig. 22 is a front view of the operation portion of the opening device of the first embodiment in a state where two pedals are operated (two-dot chain line) and in a state where only one pedal is operated (solid line).

Fig. 23 is a partial vertical cross-sectional view of the lock mechanism in the state where only one pedal is operated and the displacement of the operating portion is half, in the opening device of the first embodiment.

Fig. 24 is a schematic perspective view of the shedding device according to the first embodiment, in a state where both pedals are not operated, the operating portion is not popped up, and the lock mechanism is locked.

Fig. 25 is a schematic perspective view showing a state in which two pedals are operated to cause the operating portion to jump up and the lock of the lock mechanism is released in the opening device according to the first embodiment.

Fig. 26 is a schematic perspective view showing the lock mechanism of the shedding device according to the first embodiment in a state where only one pedal is operated and the displacement of the operating portion is halved.

Fig. 27 is a perspective view showing an operation portion, a link mechanism, and a lock mechanism in the opening device of the second embodiment.

Fig. 28 is a perspective view showing an operation portion and a link portion in the opening device of the second embodiment.

Fig. 29 is a side view of an operating portion and a link mechanism before a pedal is stepped on by a front wheel of the wheelchair in the shedding apparatus of the second embodiment.

Fig. 30 is a side view of the operating portion and the link mechanism in a state where the front wheel of the wheelchair is stepping on the pedal in the hatch device of the second embodiment.

Fig. 31 is a perspective view showing the interlocking portion and the operating portion of the opening device according to the second embodiment.

Fig. 32 is a plan view showing the interlocking portion and the operating portion of the opening device according to the second embodiment.

Fig. 33 is a plan view showing a state in which two pedals are operated to pull the interlocking section and the operating section and unlock the lock mechanism in the opening device of the second embodiment.

Fig. 34 is a plan view showing the link mechanism in a state where only one pedal is operated and the displacement of the interlocking section and the operating section is half in the opening device of the second embodiment.

Fig. 35 is a partial perspective view showing a lock mechanism in the opening device of the second embodiment.

Fig. 36 is a partial longitudinal cross-sectional view showing a locked state of a lock mechanism before a pedal is stepped on by a front wheel of a wheelchair in the shedding apparatus according to the second embodiment.

Fig. 37 is a partial longitudinal cross-sectional view of a lock mechanism in a state where a front wheel of a wheelchair steps on a pedal in the shedding device of the second embodiment.

Fig. 38 is a partial longitudinal cross-sectional view of the lock mechanism in the state where the front wheel is separated from the upper cover in the opening device of the second embodiment.

Fig. 39 is a partial longitudinal sectional view of the lock mechanism in a state where the upper cover is closed in the opening device of the second embodiment.

Fig. 40 is a partial longitudinal cross-sectional view of the lock mechanism in a state where the lock lever rotates the first lock cam in the opening device of the second embodiment.

Fig. 41 is a partial longitudinal sectional view of the lock mechanism in a state where only one pedal is operated in the opening device of the second embodiment.

Detailed Description

[ first embodiment ]

First, as shown in fig. 1A and 1B, the opening device 8 and the evacuation device 11 provided in the opening device 8 according to the first embodiment are used for evacuating from an upper corridor and a balcony to a lower corridor and a balcony in an emergency. The opening device 8 has an outer frame 100 which is fitted and fixed to the floor base 2 on the upper side to form the opening 3 for evacuation.

The evacuation device 11 of the first embodiment includes: a guide post 1 vertically arranged on the floor surface 4 of the lower layer and fixed at the upper end to the outer frame 100; and an elevating platform 5 (see fig. 2 and 3). The elevating platform 5 is driven to be elevated between a standby position held in the evacuation frame 100 and an evacuation position where the elevating platform is lowered from the standby position along the guide support 1 and landed on the lower floor surface 4.

The guide stay 1 is a hollow pipe having an appropriate bending strength, and is formed by, for example, extrusion molding of aluminum. The lower end of the guide post 1 is fixed to the floor base 2 of the lower floor, and the upper end is fixed to the outer frame 100. Further, a rack groove 15 is formed in one side wall surface of the guide pillar 1.

The outer frame 100 is provided with an upper cover 110, and one end side of the upper cover 110 is rotatably supported by the outer frame 100 so as to be able to close the opening 3. In the present embodiment, the upper cover 110 is configured as an opening device 8 that can open and close the opening 3 by a predetermined mechanism to be described later, and the content of the opening device 8 will be described later in detail. In the present embodiment, a lock mechanism 200 is provided, and the lock mechanism 200 locks the upper cover 110 to the outer frame 100 in a state where the opening 3 is closed. The contents of the locking mechanism 200 will be described in detail later.

Further, a weight suspended from a predetermined wire is accommodated in the hollow portion of the guide stay 1. The end of the cable opposite to the fixed end of the weight is connected to the elevating platform 5, and a pulley is disposed between the weight and the fixed end of the elevating platform 5. The weight is set to a weight capable of lifting the lifting platform 5 in a state of not riding on the user upward, and the lifting platform 5 is formed to be returned to the standby position by the weight of the weight when the user leaves the lifting platform 5 after reaching the lower floor.

On the other hand, a column insertion opening 5a (see fig. 3) through which the guide column 1 is inserted is opened in the elevating table 5. The pillar insertion opening 5a is formed in each of the adjacent edges 7 adjacent to both outer sides of the riding edge 6 of the riding entrance when the refuge rides on the elevating platform 5 in the standby position. These post insertion openings 5a are formed at positions equally spaced from the riding-in edge 6, and two guide posts 1 are provided upright at opposing positions corresponding to these post insertion openings 5 a.

In order to raise and lower the lifting and lowering table 5 along the guide post 1 inserted through the post insertion opening 5a as described above, a pinion gear 13 and the like are disposed around the post insertion opening 5 a.

The pinion gear 13 meshes with the rack groove 15 of the guide stay 1. Further, the following means may be provided: the rotation of the pinion gear 13 is operated by using a centrifugal brake, and the rotation speed of the pinion gear is limited.

In order to be used in the wheelchair 16, a wheel guide groove 17 (see fig. 3) for guiding the wheels 16a and the front wheels 16b of the wheelchair 16 is recessed in the surface of the elevating platform 5. The wheel guide groove 17 is formed over substantially the entire length from the riding edge 6 to the depth side edge 7a of the lifting platform 5, and the wheelchair 16 rides on the lifting platform 5 by moving in the direction of the depth side edge 7a after riding on the riding edge 6.

As shown in fig. 2, the wheel guide groove 17 is formed with an inclined surface 20, and the inclined surface 20 extends from a position spaced apart from the riding edge 6 by a predetermined distance to the riding edge 6 as a starting end 19, and is formed to prevent a step from being generated when the wheelchair 16 is retracted to the floor surface 4 of the lower floor after being evacuated to the lower floor.

Further, in order to absorb a step with the floor surface 4 on the upper floor side when the vertically movable platform 5 is located at the standby position, the slope member 18 is attached to the outer frame 100 via the slope controller 25.

In the description of the present specification, the description of the "clockwise" rotation direction and the "counterclockwise" rotation direction refers to the "clockwise" rotation direction and the "counterclockwise" rotation direction in the case where the drawings are viewed from the front in the description using the drawings. In the figure, reference numeral 18a denotes a guide rising piece, 18b denotes a rotation shaft member, 25a denotes a support rod, and 25b denotes a tire member.

As shown in fig. 3, a railing body 26 is attached to the elevating platform 5. The rail body 26 has a crossbar 26a and vertical bars 26b extending in a right angle direction from both ends of the crossbar 26a, and is formed in a U shape, and is attached to the elevating table 5 by rotatably connecting free ends of the vertical bars 26b to the vicinity of the depth side edge 7a of the elevating table 5.

The handrail 26 is always urged toward the use posture by a spring. The standing posture is formed without any special operation (by opening the upper cover 110) during use.

The evacuation device 11 is provided with a stopper device for holding the elevating platform 5 at the standby position, and a manual release operation unit 29 for manually releasing the stopper device is disposed on the crossbar 26a of the handrail body 26.

Therefore, when the elevating platform 5 is located at the standby position, the lowering of the elevating platform 5 is restricted via the above-described stopper device.

From this state, the manual release operation unit 29 is manually operated to manually release the stopper device, and the lift table 5 starts to descend.

(mechanism of opening device 8 capable of closing opening 3 with upper cover 110)

Hereinafter, a mechanism of the opening device 8 capable of closing the opening 3 by the upper cover 110 will be described.

As shown in fig. 1 to 9, the opening device 8 of the present embodiment includes: a frame 100 having an opening 3 through which a person can enter and exit; an upper cover 110, one end side of which is rotatably supported by the outer frame 100, and which can close the opening 3; a lock mechanism 200 for locking the upper cover 110 to the outer frame 100 in a state of closing the opening 3; an operation unit 120 (specifically, a pedal 130) for releasing the lock of the lock mechanism 200; an opening stop unit 150 that connects the outer frame 100 and the upper cover 110 and stops the opening of the upper cover 110 at a maximum opening angle (specifically, 90 °); and a biasing mechanism 140 that biases the upper cover 110 in the opening direction.

The opening stop unit 150 includes: a first arm 160 rotatably coupled to the outer frame 100; and a second arm 170 rotatably coupled to each of the first arm 160 and the upper cover 110.

The first arm 160 and the second arm 170 are folded when the upper cover 110 is closed, and the upper cover 110 is opened by the biasing mechanism 140 and the other biasing mechanism 14 when the lock of the lock mechanism 200 is released by the operation of the operation unit 120.

The above-described contents will be described in further detail with reference to fig. 4 to 9.

Fig. 4A is a plan view of the upper cover 110, and fig. 4B is a partially enlarged plan view of the upper cover 110, and as shown in fig. 5, the upper cover 110 is formed such that the height on the left side is low and the height on the right side is high.

As shown in fig. 5 to 8, the upper cover 110 is pivotally supported on the outer frame 100 via a rotating shaft 112 at the end edge side of the upper cover 110 on the side with a high height. Further, the outer frame 100 is integrally formed with the housing 21. As shown in fig. 8, the upper cover 110 of the present embodiment is formed to be rotatable up to 90 ° (maximum opening angle) with respect to the outer frame 100 as will be described later.

As described later, a locking mechanism 200 for locking the upper cover 110 to the outer frame 100 in a state where the opening 3 is closed is provided at an edge of the upper cover 110 on the side having a relatively low height on the left side in fig. 5. As shown in fig. 4A, two pedals 130 serving as the operation unit 120 for releasing the lock of the lock mechanism 200 are provided side by side along the left edge of the upper cover 110. The two pedals 130 are formed so as to be aligned with the interval between the two front wheels 16b of the normal wheelchair 16, and as shown in fig. 9, the pedals 130 can be operated by pressing the end portions of the pedals 130 from above from the left side by the left and right front wheels 16b of the wheelchair 16.

A stepped step 111, which is rectangular in plan view and slightly recessed from the periphery, is formed at the center of the upper surface of the upper cover 110. By providing the stepped portion 111, the upper cover 110 can be reinforced and the rigidity can be improved.

In the present embodiment, thin plate-shaped connecting brackets 113 are fixed to both side ends of the upper cover 110, and the biasing mechanism 140 and the second arm 170 are coupled to the connecting brackets 113. A stopper 180 described later is also provided to the connection bracket 113.

As shown in fig. 4A, 4B, 5, and 6, a biasing mechanism 140 for connecting the outer frame 100 and the upper cover 110 on the side of the rotation shaft 112 is provided on the end edge of the upper cover 110 on which the rotation shaft 112 is provided. The urging mechanism 140 is a gas spring, and is urged in a direction of pushing out the piston rod 142 in the cylinder 141 by the pressure of the gas filled therein.

As described above, the opening stop portion 150 is provided, and the opening stop portion 150 connects the outer frame 100 and the vicinity of the rotation shaft 112 side of the upper cover 110, and stops the opening of the upper cover 110 at the maximum opening angle.

In the present embodiment, the first arm 160 is constituted by "another urging mechanism 145" different from the urging mechanism 140 described above. The other urging mechanism 145 is also a gas spring similarly to the urging mechanism 140 described above, and an urging force is applied in the direction of pushing out the piston rod 147 in the cylinder 146 by the pressure of the gas filled therein. The second arm 170 is not a biasing mechanism, and is formed of a rod-like member having a substantially U-shaped cross section.

An end of a piston rod 142 of the biasing mechanism 140 is rotatably coupled to the connecting bracket 113, and an end of a cylinder 141 of the biasing mechanism 140 is rotatably coupled to the outer frame 100. One end of the first arm 160 is rotatably coupled to the frame 100 via a first shaft C, and the other end of the first arm 160 is rotatably coupled to one end of the second arm 170 via a third shaft E. The other end of the second arm 170 is rotatably coupled to the connecting bracket 113 via a second shaft D.

In the present embodiment, the first arm 160 of the first arm 160 and the second arm 170 is formed by the other biasing mechanism 145, and the second arm 170 is formed by a rod-shaped member, but the present invention is not particularly limited thereto. Specifically, for example, the structures of the two are reversed, the second arm 170 is formed by the other urging mechanism 145, and the first arm 160 is formed by a rod-like member. In this case, the stopper 180 may be provided in the frame 100 and may abut against the first arm 160.

As shown in fig. 5, a lock mechanism 200 is formed between the end edge of the upper cover 110 on the opposite side of the rotation shaft 112 and the outer frame 100, and the lock mechanism 200 locks the upper cover 110 to the outer frame 100 in a state where the upper cover 110 closes the opening 3 (see fig. 1 and 2) and above the lifting table 5 in a horizontal state. The lock mechanism 200 is configured such that when the two pedals 130 provided at the end edge of the upper cover 110 are operated, the lock of the lock mechanism 200 is released.

Further, the contents of the locking mechanism will be described in detail later. When the lock of the lock mechanism 200 is released, the urging force of both the urging mechanism 140 and the other urging mechanism 145 as the first arm 160, specifically, the urging force of the total of four urging mechanisms (two urging mechanisms 140 and two other urging mechanisms 145) on the left and right sides applies a force to the upper cover 110 in the horizontal state as shown in fig. 5 and 6 in a direction in which the upper cover 110 is opened, and the upper cover 110 is rotated in the opening direction about the rotation shaft 112 as a rotation center.

As shown in fig. 7, when the upper cover 110 is opened to the outer frame 100 (in the horizontal direction) by a rotation angle of about 70 ° (specifically, for example, 66 °, hereinafter referred to as "half-open angle" in the present embodiment) which is an example of a predetermined angle, the other biasing mechanism 145 as the first arm 160 is in a state in which the piston rod 147 is fully extended from the cylinder 146, and is in a state in which the piston rod 147 is not further extended from the inside of the cylinder 146 to the outside. Therefore, after the fully extended state, the other biasing mechanism 145 as the first arm 160 does not generate a biasing force.

That is, the first arm 160 of the present embodiment is another biasing mechanism 145 that extends the piston rod 147 to the maximum operating length as a gas spring. The second arm 170 of the other urging mechanism 145, which is being extended, abuts on the stopper 180 at point B shown in fig. 7, and is pressed in a direction to be folded with respect to the other urging mechanism 145. Further, the first arm 160 abuts the stopper 180 at point B until the piston rod 147 is extended to the maximum working length, i.e., during the period shown in fig. 6 to 7.

When the other biasing means 145 reaches the maximum operating length and the second arm 170 is rotated in the direction of being spread out with respect to the other biasing means 145 by the biasing means 140, the point a shown in fig. 8 comes into contact with the stopper 180, whereby the maximum opening angle can be maintained.

That is, when the upper cover 110 is opened to the maximum opening angle, the stopper 180 abuts on the point a of the second arm 170, and suppresses further rotation.

As described above, when the upper cover 110 is further opened after the upper cover 110 is opened from the horizontal state to the half-open angle, the upper cover 110 is further opened by the biasing force of the biasing mechanism 140.

Further, since the first arm 160 has been fully extended, the piston rod 147 does not protrude further outward, but the second arm 170 coupled to the distal end side of the first arm 160 rotates relative to the first arm 160 as shown in fig. 7 and 8. This allows the upper cover 110 to be further opened.

In the present embodiment, the stopper 180 that abuts the opening stop portion 150 (specifically, the second arm 170) is formed in the upper cover 110 so that when the upper cover 110 is opened to the half-open angle and then further opened as described above, the upper cover 110 is not further opened in a state where the upper cover 110 is opened to the maximum opening angle with respect to the outer frame 100, as shown in fig. 8.

When the angle at which the upper cover 110 is opened with respect to the outer frame 100 does not reach the maximum opening angle (90 °) in the state where the other biasing mechanism 145 is fully extended, the second arm 170 rotates with respect to the upper cover 110 and abuts against the stopper 180, thereby opening the upper cover 110 to the maximum opening angle (90 °).

When the upper cover 110 is opened to the maximum opening angle (90 °), as shown in fig. 8, the stopper 180 abuts against the side end a of the second arm 170, so that the upper cover 110 is not further opened. Further, while the upper cover 110 is rotated to the half open angle, as shown in fig. 7, the first arm 160 biases the second arm 170, and the side end B of the biased second arm 170 abuts on the stopper 180. Thereby, the urging force of the other urging mechanism 145 as the first arm 160 is transmitted to the upper cover 110. Further, the side end of the arm 170 is formed not to abut against the stopper 180 while the rotation angle of the upper cover 110 is from the half open angle (fig. 7) to 90 ° (fig. 8).

(function and effect of opening/closing operation of upper lid 110 in opening device 8)

In the present embodiment, the opening device 8 as described above is provided, whereby the following operations and effects can be obtained.

The opening stop unit 150 of the present embodiment includes: a first arm 160 rotatably coupled to the outer frame 100; and a second arm 170 rotatably coupled to each of the first arm 160 and the upper cover 110. The opening stop portion 150 is formed such that the first arm 160 and the second arm 170 are folded when the upper cover 110 is closed.

This allows the opening stop unit 150 to be housed in a narrow space around the opening of the opening device 8.

In addition, the present embodiment includes: a locking mechanism 200 for locking the cover 110 to the outer frame 100 in a state of closing the opening 3; and a pedal 130 and a link mechanism 210 as an operation unit 120 for releasing the lock of the lock mechanism 200. When the lock mechanism 200 is unlocked by the operation of the operation unit 120, the upper cover 110 is opened by the biasing force of the biasing mechanisms (the biasing mechanism 140 and the other biasing mechanism 145). Thus, the lock of the lock mechanism 200 is released by the operation of the operation unit 120 (including the case where the pedal 130 is depressed by the front wheel 16b of the wheelchair 16) by a person who intends to enter or exit the opening 3, and the person can open the upper cover 110 without lifting the upper cover 110 with his or her hand or the like.

Therefore, even the elderly, children, and the disabled who have weaker hand strength than the average adult can open the upper cover 110 without lifting the heavy upper cover with their own hands, and can smoothly enter and exit the building through the opening 3 where the upper cover 110 is opened. As a result, even in an emergency such as a fire, the upper cover 110 can be easily opened, and evacuation or the like in an emergency can be facilitated.

According to the present embodiment, the first arm 160 of the opening stop portion 150 is formed of "another biasing mechanism 145" in addition to the "biasing mechanism 140" that biases the upper cover 110 in the opening direction. That is, the biasing force for biasing the upper cover 110 in the opening direction is obtained by two biasing mechanisms, i.e., "the biasing mechanism 140" and "the other biasing mechanism 145". In order to obtain the acting force, if the acting force is realized by one force applying mechanism, a large force applying mechanism generating a large acting force is needed, and on the contrary, the required acting force can be obtained by arranging two force applying mechanisms generating a smaller acting force.

In general, a common member can be used as the urging mechanism that generates a small urging force.

In addition, in the case where the upper lid 110 blocking the opening 3 provided in the floor or the like from above in a horizontal state is pivotably coupled by a hinge or the like, when the upper lid 110 is to be lifted by pivoting about the pivot shaft 112 of the hinge or the like, the maximum force is usually required due to the self weight of the upper lid 110 when the upper lid 110 in the horizontal state as the initial state is initially lifted from the horizontal state as the initial state. Further, when the upper cover 110 is opened to a certain degree of angle, for example, when the upper cover 110 is in the vicinity of the half-open angle as described above, a particularly large force is not necessary thereafter, and the upper cover can be opened with a small force.

Therefore, when the upper cover 110 that closes the opening 3 in the horizontal state is smaller than a predetermined angle (half open angle), the upper cover 110 is opened by the urging force of both the two urging mechanisms (the urging mechanism 140 and the other urging mechanism 145) having small urging forces. Thereafter, when the upper cover 110 is opened to a predetermined angle (half-open angle) without a large biasing force, the upper cover 110 is opened by only one of the biasing force of the biasing mechanism 140 and the biasing force of the other biasing mechanism 145. Therefore, the impact when the upper cover 110 is opened to the maximum opening angle can be suppressed.

In the present embodiment, when the angle at which the upper cover 110 is opened with respect to the outer frame 100 does not reach the maximum opening angle (90 °) in the state where the other urging mechanism 145 is fully extended, the second arm 170 is configured to rotate with respect to the upper cover 110, and the upper cover 110 is further opened to the maximum opening angle.

In the state where the other urging mechanism 145 is fully extended, when the angle at which the upper cover 110 is opened with respect to the outer frame 100 does not reach the maximum opening angle (90 °), the upper cover 110 is in a state having an opening angle (margin) with respect to the outer frame 100. In this state, the upper cover 110 is biased in the opening direction by the biasing force of the "biasing mechanism 140" and is rotated. At this time, since the "other biasing mechanism 145" of the first arm 160 is in a fully extended state, the second arm 170 is pulled by the first arm 160 (the other biasing mechanism 145), and the second arm 170 rotates with respect to the upper cover 110. In a state where the upper cover 110 is opened to the maximum opening angle (90 °) with respect to the outer frame 100, the second arm 170 abuts on the stopper 180 so that the upper cover 110 is not further opened, the rotation of the second arm 170 is stopped, and the opening of the upper cover 110 coupled to the second arm 170 is stopped by the rotation stop of the second arm 170. Thereby, the opening is stopped in a state where the upper cover 110 is opened to the maximum opening angle (90 °).

Further, a first axis C as a coupling portion of the first arm 160 and the frame 100, a second axis D as a coupling portion of the second arm 170 and the connection bracket 113, and a third axis E as a coupling portion of the first arm 160 and the second arm 170 are not arranged on a straight line in a state where the upper cover 110 is opened to the maximum opening angle. That is, the third axis E is provided on the opposite side (in the present embodiment, the side close to the rotation axis 112 of the upper cover 110) to the side where the first arm 160 and the second arm 170 are folded with respect to an imaginary line connecting the first axis C provided on the outer frame 100 side of the first arm 160 and the second axis D provided on the upper cover 110 side of the second arm 170.

Accordingly, when a force is applied to the upper cover 110 in the closing direction in a state where the upper cover 110 is opened to the maximum opening angle, a compressive force acts on a straight line connecting the second axis D and the first axis C, and the first arm 160 and the second arm 170 are rotated in the folding direction, respectively. Thereby, the upper cover 110 is rotated from the opened state to the closed direction.

The lock mechanism 200 described above will be described in detail below with reference to fig. 9 to 26.

(operation section 120)

As shown in fig. 9, when the lock mechanism 200 is unlocked, the end portions of the left and right pedals 130 are operated to be depressed from above by the left and right front wheels 16b of the wheelchair 16 from the left end edge side of the upper cover 110.

In the present embodiment, a pedal 130 and a link mechanism 210 are provided as an operation unit 120 for releasing the lock of the lock mechanism 200 by operation.

As shown in fig. 10 and 11, the link mechanism 210 is formed to connect the two pedals 130 and the lock mechanism 200, and is configured such that the lock of the lock mechanism 200 is not released when the two pedals 130 are not operated simultaneously.

Here, as shown in fig. 12, the pedal 130 has a pedal shaft 134 extending in the horizontal direction as a rotation shaft. A coupling rod 132 that rotates together with the pedal 130 about the pedal shaft 134 (see fig. 13) is formed horizontally on the end edge side of the pedal shaft 134. One end of the coupling link 132 is connected to one end of a link 220, which will be described later. In the present embodiment, the link 220 corresponds to an "interlocking portion".

As shown in fig. 10, the link mechanism 210 includes: a coupling rod 132 that is provided with respect to each of the above-described two pedals 130 and that moves rotationally about each pedal shaft 134; a link 220 provided with respect to each of the two pedals 130 and operated via the coupling lever 132 according to the operation of the pedal 130; and a rod-shaped (rod-shaped) operating portion 230 that is connected to the other end portion side of each link 220 on both end sides and releases the lock of the lock mechanism 200 when the pedals 130 on both sides are operated and moved by a predetermined amount.

As shown in fig. 10 and 11, the left and right pedals 130 are provided with the coupling rod 132 and the link 220, the two ends of the operating portion 230 are connected by the left and right links 220, and the lock mechanism 200 is provided near the center of the operating portion 230.

As shown in fig. 12, immediately before the front wheel 16b of the wheelchair 16 steps on the pedals 130, the front wheel 16b abuts on the free end side of the pedals 130. In this state, as shown in fig. 13, when the front wheel 16b of the wheelchair 16 steps on the pedals 130, the pedals 130 rotate in the counterclockwise direction in fig. 13 about the pedal shaft 134 as the center of rotation, and the left free end side of the pedals 130 in fig. 13 is pressed downward. Along with this, the coupling rod 132 disposed inside the pedal 130 also moves downward.

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

In a state in which the front wheel 16b just before the pedal 130 is stepped on as shown in fig. 12, the coupling rod 132 is located at substantially the same height as the shaft 222 (see fig. 14). In this state, the link 220 that rotates about the shaft 222 is in a state of being lowered to the right as shown in fig. 14, and the end of the link 220 on the side to which the working portion 230 is connected is lowered to a lower position. Therefore, in this state, as shown in fig. 24, the working part 230 is also lowered downward.

On the other hand, in a state where the front wheel 16b steps on the pedal 130 as shown in fig. 13, the coupling lever 132 moves to a position lower than the shaft 222 (see fig. 14). As a result, the link 220 is in a state of being lifted up to the right as shown in fig. 15, and the end of the link 220 on the side to which the working portion 230 is connected is lifted up. Therefore, in this state, as shown in fig. 25, the operation portion 230 is also raised upward.

(locking mechanism 200)

The lock mechanism 200 includes: an engaging portion 242 that can be engaged with a part of the housing 100 (specifically, the lock lever 101); and a lock member (first lock cam 240) provided in the upper cover 110 and capable of switching between a locked state in which the locking of the locking portion 242 to the outer frame 100 is maintained and an unlocked state in which the locking of the locking portion 242 to the outer frame 100 is released.

The lock mechanism 200 includes a first state maintaining mechanism that can switch between a lock maintaining state for maintaining the locked state of the lock member 240 and an unlock maintaining state for maintaining the unlocked state of the lock member 240 in accordance with the operation of the link mechanism 210.

The first state maintaining mechanism 252 has a second lock cam 250 that is rotatable between a blocking state in which the rotation of the first lock cam 240 is blocked in the locked state and a permitting state in which the rotation of the first lock cam 240 is permitted in accordance with the operation of the link mechanism 210.

The lock mechanism 200 further includes a second state maintaining mechanism 262, and the second state maintaining mechanism 262 maintains the unlock maintaining state regardless of the operation of the link mechanism 210 when the first state maintaining mechanism 252 is switched to the unlock maintaining state.

The second state maintaining mechanism 262 includes a third locking cam 260, and the third locking cam 260 prevents the second locking cam 250 from returning to the prevention state when the second locking cam 250 rotates from the prevention state to the permission state.

The locking mechanism 200 is further described in detail.

As shown in fig. 16, the lock lever 101 is a part of the outer frame 100, and is formed in a columnar bar shape protruding in the horizontal direction from the outer frame 100.

The first lock cam 240 includes a groove-shaped locking portion 242 that can lock the lock lever 101 provided in the housing 100.

The first lock cam 240 is formed to be rotatable about a shaft 241 as a center of rotation, and is biased in a counterclockwise direction by a tension spring 244 having one end portion connected to the second lock cam 250.

The first lock cam 240 has a projection 245, and the projection 245 enters a four-corner recess 264, which will be described later, of the third lock cam 260 as the second state maintaining mechanism 262. The third lock cam 260 as the second state maintaining mechanism 262 can be operated by the projection 245 entering the four-corner recessed portion 264.

In addition, a convex portion 243 is formed in the first lock cam 240, and the convex portion 243 is locked in a concave portion 253 of the second lock cam 250 as the first state maintaining means 252, thereby restricting the rotation of the first lock cam 240.

The second lock cam 250 as the first state maintaining mechanism 252 is formed to be rotatable about the shaft 251, and has a concave portion 253 for locking the convex portion 243 of the first lock cam 240 to restrict the rotation of the first lock cam 240 and maintain the locked state.

The second lock cam 250 has a four-corner convex portion 254, and the four-corner convex portion 254 protrudes forward from the outer peripheral portion thereof to restrict the rotation of the third lock cam.

Further, a kick-up piece 255 is formed to protrude rearward from the second lock cam 250, and the kick-up piece 255 is popped up as the operating portion 230 moves upward, thereby rotating the second lock cam 250.

The third lock cam 260 as the second state maintaining mechanism 262 is formed to be rotatable about the shaft 261 and biased in the counterclockwise direction of fig. 16 by the torsion spring 263. In addition, the third locking cam 260 is formed with a four-corner concave portion 264 into which the projection 245 of the first locking cam 240 enters.

Fig. 16 shows the locked state of the lock mechanism 200.

In the present embodiment, the urging force of the urging means 140 and the urging force of the other urging means 145 described in the opening device 8 acts to open the horizontal upper lid 110.

Therefore, according to the relationship between the lock lever 101 fixed to the outer frame 100 and the first lock cam 240 rotatably fixed to the upper cover 110 via the shaft 241, the upper cover 110 moves in the opening direction by the above-described urging force to open the upper cover 110, and the first lock cam 240 rotates in the counterclockwise direction of fig. 16. However, the convex portion 243 of the first lock cam 240 is locked with the concave portion 253 of the second lock cam 250, and the counterclockwise rotation of the first lock cam 240 is restricted. Therefore, the lock lever 101 maintains the locked state of the card holding portion 242. As a result, the locked state of the lock mechanism 200 is maintained.

When the pair of pedals 130 are simultaneously operated, the link 132 moves downward, the link 220 that pivots about the shaft 222 is in a state of being lifted up to the right, and the operating portion 230 connected to the right end also moves upward and jumps as shown in fig. 17.

As the operation portion 230 jumps up, the jump-up piece 255 of the second lock cam 250 serving as the first state maintaining means 252 also jumps up, the second lock cam 250 rotates in the counterclockwise direction in fig. 17, the convex portion 243 of the first lock cam 240 is disengaged from the concave portion 253 of the second lock cam 250, and the first lock cam 240 is rotatable in the counterclockwise direction.

In addition, in a state where the second lock cam 250 is rotated in the counterclockwise direction (fig. 17), the four-corner convex portions 254 of the second lock cam 250 abut against the outer circumference of the projection of the third lock cam 260, and the rotation of the second lock cam 250 in the clockwise direction (fig. 17) is restricted.

As a result, as shown in fig. 18, the operation of the pedals 130 is completed, that is, the wheelchair 16 is moved backward, the front wheels 16b are separated from the pedals 130, the link rod 132 is raised, the link rod 220 is in a state of being lowered to the right (fig. 18), and even if the operating portion 230 is moved downward, the second lock cam 250 as the first state maintaining mechanism 252 is not rotated in the clockwise direction (fig. 18), and the state in which the rotation is restricted is maintained. Thus, the state in which the convex portion 243 of the first lock cam 240 is not locked with the concave portion 253 of the second lock cam 250 is maintained, and the state in which the first lock cam 240 is freely rotatable is maintained without being restricted in rotation. Accordingly, as shown in fig. 19, the first locking cam 240 is pulled by the locking lever 101 accompanying the opening of the upper cover 110, and is rotated in the counterclockwise direction by the tension of the tension spring 244. Then, the lock lever 101 is disengaged from the inside of the locking portion 242 with the rotation of the first lock cam 240, and the upper cover 110 is completely opened (lifted).

In addition, the protrusion 245 rotates the third locking cam 260 in the clockwise direction as the first locking cam 240 rotates. Thereby, the third lock cam 260 releases the restriction of the clockwise rotation of the second lock cam 250. On the other hand, since the convex portion 243 of the first lock cam 240 abuts against the outer peripheral portion of the second lock cam 250, the restriction of the clockwise rotation of the second lock cam 250 is maintained.

When the upper cover 110 is closed, as shown in fig. 20, when the upper cover 110 is pushed down by a human hand, the lock lever 101 enters the inside of the locking portion 242 of the first lock cam 240, and pushes up the upper side of the locking portion 242. Thereby, the first locking cam 240 rotates in the clockwise rotation direction of fig. 20.

When the first locking cam 240 rotates in the clockwise direction, the second locking cam 250 rotates in the clockwise direction as shown in fig. 21 due to the tensile force of the tension spring 244, and returns to the locked state similar to fig. 16.

The link mechanism 210 of the present embodiment is formed to connect two pedals 130 and the lock mechanism 200, and to prevent the lock of the lock mechanism 200 from being released if the two pedals 130 are not operated simultaneously. A mechanism in which the lock of the lock mechanism 200 is not released when the two pedals 130 are not operated simultaneously will be described.

Fig. 22 is a front view of the operating portion 230 in a state where two pedals 130 are being operated (two-dot chain line) and in 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 a state in which only the left pedal 130 is operated, specifically, a state shown in fig. 23 and 26.

Therefore, when both pedals 130 are not operated simultaneously and only one pedal 130 is operated, the operating unit 230 is in a state shown by a solid line in fig. 22. At the center position of the operating section 230, the distance of movement of the operating section 230 to jump upward is a distance L/2 which is about half of the distance L when both pedals 130 are operated, and is half L/2 of the predetermined distance L required to release the locked state of the lock mechanism 200. In this case, as shown in fig. 23, the jump-up of the operating portion 230, that is, the upward movement distance is insufficient for half of the normal, and the jump-up piece 255 cannot be jumped up to enable unlocking. As a result, the counterclockwise rotation direction of fig. 23 of the second locking cam 250 is insufficient. As compared with the case of fig. 17, the rotation amount of the second lock cam 250 is also insufficient, and the rotation restriction of the first lock cam 240 in the counterclockwise direction cannot be released. As described above, in the present embodiment, the lock state of the lock mechanism 200 is not released unless the left and right pedals 130 are not operated simultaneously, and thus, malfunction can be prevented.

According to the present embodiment, the pedal 130 is operated by being stepped on, or the front wheel 16b of the wheelchair 16 is operated by being stepped on, whereby the lock of the lock mechanism 200 can be released via the link mechanism 210 connecting the pedal 130 and the lock mechanism 200. Further, if the lock of the lock mechanism 200 is released, the upper cover 110 can be opened in the opening direction by the biasing force of the biasing mechanisms (the biasing mechanism 140 and the other biasing mechanism 145).

Thus, a user of the wheelchair 16 who cannot release the locked state of the upper cover 110 having his or her hands on the floor surface and lift and open the upper cover 110 can open the upper cover 110 by operating the pedals 130 with his or her feet, the front wheels 16b of the wheelchair 16, and the like.

According to the present embodiment, only one link 220 is operated and only one of both ends of the operating part 230 is moved when only one pedal 130 is operated. Therefore, a predetermined amount of movement of the operating portion 230 cannot be ensured, and the lock of the lock mechanism 200 is not released.

Thus, the lock mechanism 200 is not unlocked when the two pedals 130 are not operated simultaneously. Therefore, even if one pedal 130 is operated due to mischief of an infant or the like or one pedal 130 is accidentally stepped on with one foot, the lock of the lock mechanism 200 is not released. This can prevent mischief, erroneous operation, and the like of the child or the like, and can prevent the upper cover 110 from being opened by mistake.

Thus, even if the user of the wheelchair 16 cannot simultaneously operate the left and right pedals 130 with his or her hands or feet, the lock of the lock mechanism 200 can be easily released, and the upper cover 110 can be opened in the opening direction. As a result, in evacuation in an emergency such as a fire or an earthquake, the evacuation can be easily performed by the user of the wheelchair 16 alone without a caregiver.

According to the present embodiment, the locking portion 242 provided in the upper cover 110 locks the locking lever 101 provided in the outer frame 100 in the locked state, and the upper cover 110 cannot be separated from the outer frame 100, and the locking mechanism 200 is in the locked state.

Further, the locking portion 242 provided in the upper cover 110 does not lock the lock lever 101 in the unlocked state, and the upper cover 110 is in a state of being able to be separated from the outer frame 100, and the lock of the lock mechanism 200 is released.

In addition, the first state maintaining mechanism 252 maintains the above-described locked state, so that the lock mechanism 200 can maintain the locked state.

In addition, the second state maintaining mechanism 262 prevents the second lock cam from returning to the prevention state regardless of the operation position of the pedal 130 in the case where the second lock cam is rotated from the prevention state to the permission state. Thus, even if the hand, foot, front wheel 16b, or the like is separated from pedal 130 and the operation of pedal 130 is stopped after pedal 130 is operated from the locked state to the unlocked state, lock mechanism 200 can be prevented from moving from the unlocked state to the locked state again and returning to the locked state.

According to the present embodiment, the first locking cam 240 has the locking portion 242 that can lock a part of the housing 100, and can change the locked state and the unlocked state of the locking portion 242 by rotating.

Further, the second lock cam 250 as the first state maintaining mechanism 252 is in a blocking state of blocking the rotation of the first lock cam 240 in the initial state, and the locking portion 242 is in a locked state, and the first lock cam 240 can be rotated by the rotation of the second lock cam 250.

In addition, the rotatable third lock cam 260 as the second state maintaining mechanism 262 prevents the second lock cam 250 from returning to the prevention state when the second lock cam 250 rotates from the prevention state to the permission state.

While preferred embodiments of the present disclosure have been described in detail with reference to the drawings, the present disclosure is not limited to these examples. It is to be understood that various modifications and applications can be made within the scope of the technical idea described in the claims by those having ordinary knowledge in the technical field to which the present disclosure pertains, and that they also fall within the technical scope of the present disclosure.

The evacuation device 11 having the opening device 8 according to the first embodiment can be applied not only to the wheelchair 16 as described above but also to a stretcher used by a person who is difficult to move using the wheelchair 16.

[ second embodiment ]

Hereinafter, the second embodiment will be described with reference to fig. 27 to 41 as appropriate. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. The following description is directed to differences from the first embodiment.

In the description of the present specification, a direction in which the outer frame 100 has the riding edge 6 in a plan view is referred to as a "front direction", and a direction having the adjacent edge 7 is referred to as a "width direction". The opposite side to the "front side" (the direction in the direction having the depth side edge 7 a) is referred to as the "rear side".

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

(Pedal 330 and Link mechanism 410)

First, referring to fig. 28 to 32, the structures of the pedal 330 and the link mechanism 410 according to the second embodiment will be described.

Fig. 28 is a perspective view of the pedal 330 and the link mechanism 410 in a state where the pedal 330 is not depressed, fig. 29 is a side view of the pedal 330 and the link mechanism 410 in a state where the pedal 330 is not depressed, and fig. 30 is a side view of the pedal 330 and the link mechanism 410 in a state where the pedal 330 is depressed.

The opening device 8 of the present embodiment includes: a pair of pedals 330 provided on an upper portion of the upper cover 110; lock mechanisms 400 provided on both sides in the width direction on the back side of the upper cover 110; and a linkage 410 connecting the pedal 330 and the locking mechanism 400. As shown in fig. 29, the pedal 330 is pivotally supported by a pedal shaft 334 so as to be rotatable, and has a first link pin 336 on the rear side so that the front side can be stepped on by the front wheel 16b of the wheelchair 16.

The link mechanism 410 includes: an interlocking part 420 interlocked with the operation of the pedal 330; and an operating portion 430 connected to the interlocking portion 420 and transmitting the operation of the pedal 330 to the lock mechanism 400. The link mechanism 410 can change the state of the lock mechanism 400, which will be described later, to the locked state and the unlocked state in accordance with the operation of the pedal 330.

The pedal 330 includes a link 332 interlocked with the operation of the pedal 331. Further, the interlocking section 420 includes: a connection part 424 connected to the link part 332 and linearly moving; a driven part 520 connected to the connection part 424 and moving according to the amount of movement of the connection part 424; and a guide portion 550 that guides the working portion 430 in a direction to release the lock of the lock mechanism 400.

As shown in fig. 28, link 332 includes: a first link cam 530 that rotates clockwise in the figure according to the amount of depression of the pedal 330; and a second link cam 540 connected to the first link cam 530 and linearly moving in a front and rear direction according to the rotation of the first link cam 530.

As shown in fig. 28 and 29, the pedal 330 is pivotally supported by a pedal shaft 334. The pedal 330 has a first link pin 336 having a cylindrical shape extending in the width direction on the rear side of the pedal shaft 334. Namely, the following structure is obtained: when the front wheel 16B of the wheelchair steps on the front side of the pedal 330, the first link pin 336 moves upward.

The first link cam 530 is pivotally supported by the link shaft 338 to be rotatable. The first link cam 530 has a first long hole 534 and a second long hole 542 on the front and lower side of the link shaft 338. The first long hole 534 is inserted with the first link pin 336 in a rotatable manner, and the second long hole 542 is inserted with a second link pin 532, which will be described later, provided on the rear and lower side of the link shaft 338 in a rotatable manner. That is, the first link cam 530 has the following structure: when the first link pin 336 moves upward, it rotates about the link shaft 338 and can transmit the motion to the second link pin 532.

The second link cam 540 has a second link pin 532 having a cylindrical shape extending in the width direction on the front side, and is connected to the coupling portion 424 on the rear side. Thereby, the second link cam 540 transmits the movement of the second link pin 532 to the link 424.

As shown in fig. 29 and 30, when the first link pin 336 moves upward in response to the step on the pedal 330, the first link pin 336 pushes up the side wall of the first long hole 534 and moves toward the side of the first long hole 534 closer to the link shaft 338. Thereby, the first link cam 530 rotates clockwise in the drawing about the link shaft 338. Then, the side wall of the second long hole 542 pulls the second link pin 532 in the forward direction, and the second link cam 540 is pulled in the forward direction. That is, the rotational movement caused by the stepping of the pedal 330 is converted into a movement that moves linearly in the front-rear direction by the first link cam 530 and the second link cam 540.

When the second link cam 540 moves in the forward direction, the connection portion 424 connected to the rear end side of the second link cam 540 also moves in the forward direction.

The connection portion 424 is connected to the rear side of each second link cam 540, and is connected to a connection portion 524 of a driven portion 520, which will be described later. That is, the linear motion of the second link cam 540 is transmitted to the connection portion 524 of the driven portion 520. The coupling portion 24 includes a return spring 425 for returning to a normal state.

Next, the structure of the interlocking section 420 and the operating section 430 according to the second embodiment will be described with reference to fig. 31 to 34.

Fig. 31 is a perspective view of the interlocking portion 420 and the operating portion 430, fig. 32 is a plan view of the interlocking portion 420 and the operating portion 430 in a state where the pedal 330 is not depressed, fig. 33 is a plan view of a state where only one (right) pedal 330 is depressed, and fig. 34 is a plan view of a state where both pedals 330 are depressed.

As shown in fig. 31 and 32, the interlocking part 420 includes a driven part 520 and a guide part 550. The driven part 520 includes a long member 521 in the form of a channel steel having a longitudinal direction in the width direction of the opening device 8. At both ends of the long member 521, connection portions 524 connected to the connection portions 424 are provided. Both ends of the long member 521 are movable in the forward direction (the "predetermined direction" in the present embodiment) which is the moving direction of the connecting portion 424. The guide portion 550 is provided at the center in the width direction on the back side of the upper cover 110.

Here, the guide portion 550 of the present embodiment includes a mounting portion 551, a fixed disk 552, a guide disk 554, and a support portion 555.

The mounting portion 551 has a guide hole 553 formed at the center in the width direction with the front-rear direction as the longitudinal direction. A shaft supporting the guide disc 554 is movably inserted into the guide hole 553. Further, the mounting portion 551 is provided with a pair of fixed disks 552 on the outer side in the width direction with respect to the guide disk 554.

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

In addition, the pair of fixed disks 552 guide an inner cable 434 described later.

The support portion 555 is provided at a middle portion 522 in the width direction center of the driven portion 520. The support 555 extends rearward, and a guide disk 554 is attached to a rear end thereof. That is, the guide disc 554 moves in the front-rear direction together with the middle portion 522 of the driven portion 520.

As described above, since the guide hole 553 of the mounting portion 551 is formed with the front-rear direction as the longitudinal direction, the shaft of the guide disc 554 moves in the front-rear direction along the guide hole 553. Therefore, when the support portion 555 provided at the middle portion 522 of the driven portion 520 moves, the middle portion of the inner cable 434 of the operating portion 430 is pulled forward by the guide disc 554.

The guide disc 554 may be connected to the middle portion 522 of the driven portion 520.

The working portion 430 has a pair of outer tubes 432, an inner cable 434, and a connecting portion 436. The inner cable 434 is connected to a lock mechanism 400 described later via a connection part 436. Further, the tension of the inner cable 434 is adjusted by the adjuster 402 (see fig. 36) provided in the lock mechanism 400.

The outer tube 432 is a flexible cylindrical body having non-compressibility in the longitudinal direction, and is disposed between the lock mechanism 400 and the mounting portion 551, which will be described later.

The inner cable 434 is hung at the intermediate portion thereof on the guide disc 554 and the pair of fixed discs 552, and is inserted through the inner sides of the pair of outer tubes 432.

The connection part 436 is provided on both end sides of the inner cable 434, and connects the pair of lock mechanisms 400 and the inner cable 434.

Here, as in the state shown in fig. 33, when both pedals 330 are depressed, the driven portion 520 moves forward due to the connecting portions 524 at both ends, and therefore the entire long member 521 also moves forward.

In this case, the guide disc 554 connected to the support 555 moves forward in accordance with the movement of the elongated member 521 of the driven portion 520. In this case, the moving distance of the middle portion 522 of the driven portion 520 is L.

The intermediate portion 522 of the driven portion 520 moves forward by the distance L, and the intermediate portion of the inner cable 434 of the working portion 430 is pulled forward by the guide disc 554. Thereby, the connection parts 436 on both end sides of the inner cable 434 are pulled.

As shown in fig. 34, when only one of the pedals 330 is stepped on, the corresponding connecting portion 524 moves forward, and therefore one side of the long member 521 is inclined forward.

In this case, the guide disc 554 moves forward by the inclination of the long member 521. However, the amount of movement of the middle portion 522 of the driven portion 520 is about half L/2 of the case where both pedals 330 are depressed.

Therefore, the amount by which the intermediate portion of the inner cable 434 of the operating portion 430 is pulled by the guide disc 554, that is, the amount of movement of the connecting portion 436 is about half of the amount by which both the pedals 330 are stepped.

(locking mechanism 400)

Next, the lock mechanism 400 of the present embodiment will be described with reference to fig. 35 to 41 as appropriate. The lock levers 101 are provided on both sides in the width direction of the outer frame 100, and the pair of lock mechanisms 400 are provided on both sides in the width direction of the inner surface of the upper cover 110.

Fig. 35 is a partial perspective view of the lock mechanism 400, and fig. 36 to 41 are partial vertical sectional views of the lock mechanism 400 showing the lock mechanism 400 in the locked state and the unlocked state.

Fig. 36 is a sectional side view of the lock mechanism 400, and the left side of the figure is the "widthwise outer side" of the opening device 8. The lock mechanism 400 includes a lock cam supporting member 480, lock members (first lock cams 440) supported by the lock cam supporting member 480, a first state maintaining mechanism (second lock cams 450), and a biasing member (tension spring 460) as a second state maintaining mechanism.

The locking cam supporting member 480 has a shaft 441 that pivotally supports the first locking cam 440, and a shaft 451 that pivotally supports the second locking cam 450. The shaft 451 is provided on the inner side in the width direction of the opening device 8 than the shaft 441. In addition, the lock cam supporting member 480 is formed with a first guide portion 484 and a second guide portion 485 as elongated holes. The locking cam supporting member 480 fixes the upper portion to the inner side of the upper cover 110 (i.e., the lower surface side of the upper cover 110).

The first guide portion 484 is formed in an arc shape on the outer side in the width direction than the shaft 441, and is cut away downward from the lower end of the arc shape. The arcuate portion of the first guide 484 has a rim concentric with the shaft 441, and guides a first hooking portion 449 provided on the first lock cam 440, which will be described later, in accordance with the rotation of the first lock cam 440.

Further, the upper end of the first guide portion 484 is formed to a height equal to the shaft 451. That is, when the lock mechanism 400 is in the locked state, the first hooking portion 449 is preferably located at the same height position as the shaft 451.

The second guide portion 485 is an elongated hole formed in an arc shape on the inner side in the width direction than the shaft 451. The second guide portion 485 has a concentric edge with respect to the shaft 451, and guides a second hooking portion 459, which will be described later, provided to the second lock cam 450 according to the rotation of the second lock cam 450.

Further, the hole of the second guide portion 485 is formed to the upper and lower with respect to the shaft 451.

The first locking cam 440 has a first hooking portion 449, a locking portion 442, a first recessed portion 446, a second recessed portion 447, and a sliding portion 448 provided between the first recessed portion 446 and the second recessed portion 447. The first locking cam 440 is rotatably shaft-supported by the shaft 441.

As shown in fig. 35 and 36, the first hooking portion 449 is located on the outer side in the width direction than the shaft 441 and above in the locked state. For example, the first hooking portion 449 is a columnar member extending in the front-rear direction, which is a direction orthogonal to the width direction, and is inserted through the first guide portion 484. The first hooking portion 449 may be formed integrally with the first lock cam 440 or may be formed separately.

As shown in fig. 36, the first concave portion 446 engages with a convex portion 456 of a second lock cam 450 described later in a locked state. As shown in fig. 39, the second concave portion 447 engages with the convex portion 456 of the second lock cam 450 in the unlocked state.

The sliding portion 448 is a curved surface that can rotate the first lock cam 440 in a state of being abutted by the convex portion 456 of the second lock cam 450.

The locking portion 442 is a long hole that opens on the outer side in the width direction of the first locking cam 440 in the locked state, and locks the locking lever 101 in the locked state.

As shown in fig. 35 and 36, the second lock cam 450 has a second hooking portion 459 and a convex portion 456. The second lock cam 450 is axially supported on the shaft 451 so as to be rotatable inward in the width direction with respect to the first lock cam 440.

As shown in fig. 35, the second hooking portion 459 is located inward and downward in the width direction of the shaft 451 in the locked state. For example, the second hooking portion 459 is a columnar member extending in a direction perpendicular to the width direction, i.e., in the front-rear direction, and is inserted into the second guide portion 485 formed in the lock cam support member 480. The second hooking portion 459 may be formed integrally with the second lock cam 450 or may be formed separately.

As shown in fig. 36, the second lock cam 450 is connected to the connecting portion 436 of the operating portion 430 below the shaft 451. That is, when the inner cable 434 of the working part 430 is pulled, the second locking cam 450 rotates counterclockwise in the figure.

As shown in fig. 36, the first hooking portion 449 and the second hooking portion 459 are biased in a direction to approach each other by a tension spring 460 which is an example of a biasing member. Specifically, one end side of the extension spring 460 is hooked on the first hooking portion 449 of the first lock cam 440, and the other end side of the extension spring 460 is hooked on the second hooking portion 459 of the second lock cam 450.

In the state shown in fig. 36, the tension spring 460 biases the first hooking portion 449 and the second hooking portion 459 in the approaching direction in a state of being located below the shaft 451. That is, the second lock cam 450 is biased in the clockwise direction, and the rotation is suppressed.

The operation of the lock mechanism 400 of the present embodiment and the change between the locked state and the unlocked state will be described below.

As shown in fig. 36, when the lock mechanism 400 of the present embodiment is in the locked state, the lock lever 101 is locked to the first lock cam 440. Therefore, as long as the first locking cam 440 is not rotated, the opening of the upper cover 110 is restricted.

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

Here, as shown in fig. 37, when the front wheel 16b of the wheelchair 16 steps on both of the pedals 330, the inner cable 434 of the operating portion 430 is pulled inward in the width direction, and the second lock cam 450 rotates counterclockwise in the drawing. In this state, the first lock cam 440 can rotate without being restrained by the second lock cam 450. That is, the lock mechanism 400 is unlocked.

In the state of fig. 37, when the second lock cam 450 is rotated, the second hooking portion 459 moves upward in the width direction with respect to the shaft 451, and the rotation is permitted by the second lock cam 450. That is, in the present embodiment, this state corresponds to the "permission state" in which the rotation of the first locking cam 440 is permitted.

In the lock mechanism 400 of the present embodiment, the extension spring 460 is moved to the opposite side of the position of the extension spring 460 in the blocked state with respect to the position in the blocked state via the shaft 451, and the extension spring 460 continues to bias the first hooking portion 449 and the second hooking portion 459 in the approaching direction. Thereby, the second lock cam 450 is restrained from rotating clockwise in the reverse direction, and is kept in a state of being rotated clockwise from the initial state.

Therefore, even when both of the depressed pedals 330 return to the original state, the second lock cam 450 once changed to the unlocked state is restrained from returning to the blocked state of fig. 36 by the tension spring 460, and remains in the allowed state of fig. 37.

Next, when the front wheels 16b of the wheelchair 16 are removed from the pedals 330 and the upper cover 110 has no load, the upper cover 110 is rotated in the opening direction by the biasing mechanism 140 as shown in fig. 38, similarly to the opening device 8 of the first embodiment.

In this case, the first locking cam 440 moves upward while being rotated counterclockwise in the figure by the locking lever 101 fixed to the frame 100. Thereby, the lock lever 101 is disengaged from the latching portion 442 of the first lock cam 440.

In addition, in a state where the first locking cam 440 rotates counterclockwise in the drawing, the first hooking part 449 also moves downward. Thus, the extension spring 460 connecting the first hooking portion 449 and the second hooking portion 459 is positioned below the locking shaft of the second lock cam 450, and the second hooking portion 459 rotates the second lock cam 450 clockwise in the drawing due to the biasing force of the extension spring 460.

In a state where the lock lever 101 is disengaged from the first lock mechanism 400, the convex portion 456 of the second lock cam 450 is engaged with the second concave portion 447 of the first lock cam 440. The postures of the first and

second locking cams

440 and 450 are maintained by the biasing force of the tension spring 460.

Next, as shown in fig. 39, when the upper cover 110 is rotated in the closing direction, first, the lock lever 101 abuts against the locking portion 442 of the first lock cam 440. When the upper cover 110 is further rotated in the closing direction from this state, the first locking cam 440 is rotated clockwise in the figure by the locking lever 101.

When the upper cover 110 is further rotated in the closing direction, the lock lever 101 rotates the first lock cam 440 clockwise in the figure as shown in fig. 40. In this state, the first hooking portion 449 and the second hooking portion 459 urge the first lock cam 440 in the counterclockwise direction and the second lock cam 450 in the clockwise direction by the tension spring 460.

Here, the first lock cam 440 can rotate clockwise in the figure while the convex portion 456 of the second lock cam 450 abuts against the sliding portion 448 of the first lock cam 440. Whereby the first locking cam 440 is not restrained from rotating.

In a state where the upper cover 110 is completely closed, the first locking cam 440 rotates to the same angle as fig. 36. That is, the locking lever 101 is locked by the locking portion 442.

The convex portion 456 of the second lock cam 450 slides on the slide portion 448 of the first lock cam 440, and then engages with the first concave portion 446 again. Thereby, the second locking cam 450 rotates to the same angle as fig. 36. Therefore, the rotation of the first locking cam 440 is inhibited again by the second locking cam 450, changing to the "blocked state".

Further, in the case of the "blocked state" shown in fig. 36, in the case where only one of the pedals 330 is operated as described above, the second locking cam protrusions 456 do not disengage from the first recesses 446 of the first locking cams 440 as shown in fig. 41. That is, the second locking cam 450 does not change into the "permitted state", and thus the first locking cam 440 does not rotate.

When only one of the pedals 330 is operated to return to the original state (the front wheel 16b of the wheelchair 16 is moved away from the pedal 330) from the state shown in fig. 41, the second lock cam 450 is pulled by the tension spring 460. Thereby, the second locking cam 450 returns to the state of fig. 36.

(action and Effect)

The operation and effect of the link mechanism 410 and the lock mechanism 400 according to the present embodiment will be described below.

First, with the link mechanism 410 of the present embodiment, the moving distance of the guide disc 554 and the connecting portion 436 when only one of the pedals 330 is stepped on is half L/2 as compared with the moving distance when both of the pedals 330 are stepped on.

That is, the amount of movement of the guide disc 554 and the connecting portion 436 can be changed according to the case where one pedal 330 is depressed and the case where both pedals are depressed.

Thus, the amount of movement of the guide disc 554 and the connecting portion 436 when one pedal 330 is depressed is less than a predetermined amount, and the amount of movement of the guide disc 554 and the connecting portion 436 when both pedals 330 are depressed is equal to or greater than a predetermined amount.

As described above, in the link mechanism 410 and the lock mechanism 400 according to the present embodiment, the following configuration can be obtained in the same manner as in the link mechanism 410 and the lock mechanism 400 according to the first embodiment: when both pedals 330 are depressed, the lock of the upper cover 110 is released, and when one pedal 330 is depressed, the lock of the upper cover 110 is not released.

The lock mechanisms 400 of the present embodiment are provided on both sides in the width direction inside the upper cover 110. Therefore, the lock lever 101 is fixed to the adjacent edge 7 side adjacent to both outer sides of the riding-in edge 6 which becomes the riding-in port, not the riding-in edge 6 side.

By using the link mechanism 410 and the lock mechanism 400 of the present embodiment, the degree of freedom in design on the riding-in edge 6 side can be increased compared to the link mechanism 410 and the lock mechanism 400 of the first embodiment, and an effect of preventing the contact with the lock lever 101 when the evacuee rides on the elevating platform 5 can be obtained.

(modification example)

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

In the above description, the pedal 330 and the driven part 520 are indirectly connected via the connection part 424, but the link mechanism 410 of the present embodiment is not limited thereto. For example, the pedal 330 and the follower 520 may be directly connected without providing the connection portion 424.

Further, the operating portion 430 of the link mechanism 410 pulls the inner cable 434 to pull and rotate the lock member 440 of the lock mechanism 400, but the link mechanism 410 of the present embodiment is not limited thereto. For example, the operating portion 430 may be a rod-shaped member, and when the follower portion 520 has moved a predetermined amount, the rod-shaped member moves outward in the width direction and pushes and rotates the second lock cam 450.

In the above description, the pair of lock mechanisms 400 is provided on both sides in the width direction, but the lock mechanisms 400 of the present embodiment are not limited to this. One or more lock mechanisms 400 can be appropriately provided to the upper cover 110 in accordance with the specification of the opening device 8. For example, one lock mechanism 400 may be arranged in the front direction in total of three lock mechanisms in addition to both sides in the width direction.

In addition, three or more lock mechanisms 400 may be provided. For example, the opening device 8 may further include the lock mechanism 400 connecting the inner cable 434 and the second lock cam 450 in a portion other than the connection portion 524 so long as the length of the operating portion 430 is within a range, and may include three or more lock mechanisms 400.

In the above description, the middle portion 522 is the center in the width direction of the driven portion 520, but the middle portion 522 of the present embodiment is not limited to this. That is, the driven portion 520 may be provided at a position separated from the center in the width direction according to the specification of the opening device 8, as long as it is positioned between the pair of coupling portions 524.

In the above description, the connecting portions 524 are both side end portions of the driven portion 520, but the connecting portions 524 of the present embodiment are not limited thereto. That is, the driven portion 520 may be provided at a position separated from both sides in the width direction of the driven portion 520 with the intermediate portion 522 interposed therebetween in a state separated from each other in the width direction, depending on the specification of the opening device 8.

In the above description, the operating portion 430 includes the pair of outer tubes 432 and the single inner cable 434 inserted through the pair of outer tubes 432, but the operating portion 430 of the present embodiment is not limited thereto. For example, the following mechanism may be adopted: a pair of inner cables 434 are provided, and the locking of the locking mechanisms 400 on the left and right sides is released by each inner cable 434.

The opening device 8 of the present embodiment is not limited to one operation portion 430. For example, the following mechanism may be employed: a plurality of working portions 430 are arranged in parallel with respect to one pair or three or more locking mechanisms 400, and the guide disc 554 pulls each working portion 430 by one operation.

As another example, the following mechanism may be adopted: a plurality of working parts 430 are arranged side by side with respect to one locking mechanism 400, and the guide disc 554 pulls each working part 430 by one operation.

The "simultaneous" does not need to be a completely identical timing as long as the timing is during pedal operation.

While the first and second embodiments of the present disclosure have been described in detail with reference to the drawings, it is needless to say that various modifications and application examples can be conceived by those having ordinary knowledge in the technical field to which the present disclosure pertains within the scope of the technical idea described in the claims, and it should be understood that they also fall within the technical scope of the present disclosure.

Industrial applicability

The present disclosure can be used as an opening device for an escape hatch, a lifting port, and the like provided in a corridor, a balcony, a roof, and the like of a building.

Claims

1. An opening device, comprising:

an outer frame having an opening through which a person can enter and exit;

an upper cover, one end of which is rotatably supported by the outer frame, and which can block the opening;

a locking mechanism for locking the upper cover to the outer frame in a state of closing the opening;

a pedal provided on the upper cover;

a link mechanism that connects the pedal and the lock mechanism and releases the lock of the lock mechanism by operating the pedal; and

and an urging mechanism that rotates the upper cover in an opening direction when the lock of the lock mechanism is released in accordance with an operation of the pedal.

2. The opening device of claim 1,

the link mechanism includes:

an interlocking part interlocked with the operation of the pedal; and

and an operating unit that does not unlock the lock mechanism when the amount of movement is less than a predetermined amount due to operation of the pedal, and unlocks the lock mechanism when the amount of movement is moved by the predetermined amount.

3. The opening device of claim 2,

the upper cover is provided with two pedals,

the operation portion may be configured such that a movement amount is less than the predetermined amount when one of the two pedals is operated, and the movement amount is equal to or greater than the predetermined amount when both of the two pedals are operated.

4. The opening device of claim 3,

the interlocking part comprises:

a driven part which is connected with the pedals directly or indirectly at the connection parts separated from each other and moves the corresponding connection parts to a preset direction according to the operation of the pedals; and

and a guide portion which is connected to a middle portion between the two coupling portions of the driven portion and guides the operating portion in a direction to release the lock of the lock mechanism when the middle portion moves in the predetermined direction.

5. The opening device of claim 4,

the working part is connected with a plurality of locking mechanisms,

the guide portion guides the working portion to simultaneously unlock the locking mechanisms.

6. The opening device according to claim 1, 2, 3, 4 or 5,

the lock mechanism includes:

a locking part which can be locked with the outer frame;

a lock member provided in the upper cover and capable of switching between a locked state in which the locking portion is held in the outer frame and an unlocked state in which the locking portion is released from locking the outer frame;

a first state maintaining mechanism capable of switching between a lock maintaining state in which the lock state of the lock member is maintained and an unlock maintaining state in which the unlock state of the lock member is maintained in association with the operation of the link mechanism; and

and a second state maintaining mechanism that maintains the unlock maintaining state regardless of an operation of the link mechanism when the first state maintaining mechanism is switched to the unlock maintaining state.

7. The opening device of claim 6,

the lock mechanism includes a first lock cam as the lock member,

the locking member has the locking portion and is capable of changing the locked state and the unlocked state of the locking portion by rotation,

the first state maintaining mechanism is a second lock cam that is rotatable between a blocking state in which rotation of the first lock cam is blocked in the locked state and a permitting state in which rotation of the first lock cam is permitted in association with operation of the link mechanism,

the second state maintaining mechanism suppresses the return of the second lock cam to the prevention state when the second lock cam is rotated from the prevention state to the permission state.

8. The opening device of claim 7,

the second state maintaining mechanism is a biasing member coupled to the first lock cam and the second lock cam.

9. The opening device of claim 1, 2, 3, 4, 5, 6, 7 or 8,

the refuge device is wholly or partially accommodated in the outer frame.