Opening / closing device for a hinged door

Abstract

To provide an opening / closing device of a hinged door having a simple configuration, capable of self-opening / closing with a simple operation.SOLUTION: A hinged door opening / closing device H comprises: a pedal 21; a pedal support 31; a sliding body 40 that reciprocates freely in linkage with a motion of the pedal 21; an end face cam body 53; lower member rotation means 60; and a rolling roller 81 mounted on a door panel D and driven along an inclined cam surface 53a of the end face cam body 53. The lower member rotation means 60 is linked with a reciprocating motion of the sliding body 40, enabling the end face cam body 53 to rotate.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an opening / closing device for a hinged door that can be opened and closed by a foot operation.

Background Art

[0002] Generally, hinged doors of toilets and the like are assumed to be opened and closed by hand. However, in recent years, in order to prevent the attachment of viruses, bacteria, etc., or as a countermeasure in situations where hands cannot be used, the development of a device that can be operated by foot has been desired.

[0003] In relation to such a device, a locking device for a toilet door that can be operated by foot is known (Patent Document 1). Also, there is a mechanism (for example, a gravity hinge) for returning the opened hinged door to its original state (Citation Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, due to various circumstances such as cost and installation space in toilet booths, etc., there are almost no practical devices that can open and close a hinged door in a stationary state by a foot operation, and the development thereof has been desired.

[0006] The present invention has been made to solve the above problems, and an object thereof is to provide an opening / closing device for a hinged door that has a simple structure and can be self-closed and self-opened by a simple operation.

Means for Solving the Problems

[0007] In order to achieve the above object, the present invention provides an opening / closing device for an opening door, comprising a foot operating body, a foot operating body support member that supports the foot operating body so that the foot operating body is movable, a slide body that is reciprocally movable in conjunction with the operation of the foot operating body, a lower member provided with an end face cam body having an inclined cam surface formed at a peripheral portion (it may be in the vicinity, the same applies hereinafter), a rotating means for the lower member, and a driven member that is attached to the opening door and follows along the inclined cam surface of the end face cam body. The end face cam body in the lower member is pivotally supported so as to be rotatable with the inclined cam surface facing upward, and the rotating means for the lower member is configured to rotate the lower member by a predetermined angle in conjunction with the reciprocating movement of the slide body, so that an upper driven member can be positioned at an upper inclined portion of the inclined surface in the end face cam body. (Hereinafter, the present invention may be referred to as "the opening / closing device for this opening door".).

[0008] Further, the opening / closing device for this opening door comprises an end face cam body attached to the opening door and having an inclined cam surface formed at a peripheral portion, a foot operating body, a foot operating body support member that supports the foot operating body so that the foot operating body is movable, a slide body that is reciprocally movable in conjunction with the operation of the foot operating body, a lower member provided with a driven member that follows along the inclined cam surface of the end face cam body, and a rotating means for the lower member. The end face cam body is pivotally supported so as to be rotatable with the inclined cam surface facing downward, and the rotating means for the lower member is configured to rotate the lower member by a predetermined angle in conjunction with the reciprocating movement of the slide body, so that the driven member can be positioned at an upper inclined portion of the inclined surface of the end face cam body (the lower portion of the inclined surface when the inclined cam surface in the end face cam body faces upward).

[0009] Further, in the opening / closing device for this opening door, the driven member can be a roller body that slides on the inclined cam surface of the end face cam body.

[0010] Further, in the opening / closing device of this opening door, the driven member is a second end face cam body having an inclined cam surface formed at the peripheral portion, the end face cam body and the second end face cam body are formed in the same shape, and the end face cam body and the second end face cam body can be pivotally supported in a state where the inclined cam surfaces face each other and are overlapped and rotatable.

[0011] Further, in the opening / closing device of this opening door, if the inclined cam surface of the end face cam body is formed such that the highest peak portion and the lowest valley portion are at point-symmetrical positions with respect to the rotation center and is formed with a continuous gradient from the highest peak portion to the lowest valley portion, it is possible to effectively exhibit its action, which is preferable.

[0012] Note that it is premised that the driven members (roller body and second end face cam body) are attached to the opening door via appropriate attachment members.

[0013] The end face cam body (the same applies to the second end face cam body. The same applies hereinafter) is a kind of solid cam, and it only needs to be formed in a shape that is rotatable with respect to the rotation axis that is the cross-sectional center of the cylindrical member or cylindrical member, and can be formed into a cylindrical shape (cylindrical shape) and a regular polygon of hexagon or more (in particular, a regular hexagon, a regular octagon, a regular dodecagon, etc. are preferable) cylindrical shape (regular polygonal column shape), etc. Further, when using the end face cam body, the inclined cam surface of the end face cam body only needs to have the highest peak portion and the lowest valley portion formed one by one, and various modes are possible.

[0014] Further, when the end face cam body (hereinafter, may be referred to as the "first end face cam body") and the second end face cam body are used in combination, by making them the same shape, when the inclined cam surfaces face each other and are arranged, it is possible to form an integral cylindrical shape (columnar shape), so it is possible to effectively exhibit the target operation and can be formed compactly, which is preferable. Also, when the first end face cam body and the second end face cam body are used in combination, a plurality of circumferential bands may be provided concentrically with respect to both end face cam bodies, and the highest top and the lowest valley may be formed in each circumferential band.

[0015] Also, when the first end face cam body and the second end face cam body are used in combination, with respect to the rotation axis, the upward highest top of the first end face cam body meshes with the downward highest top of the second end face cam body, so that the self-closing operation of the opening door on which the opening door opening / closing device is mounted starts. Therefore, it is necessary to appropriately determine the angle of the inclined surface, the positions of the highest top and the lowest valley, etc. of both end face cam bodies so as to achieve a desired effect.

[0016] Furthermore, in the opening / closing device of this opening door, a foot operating body, a foot operating body support member that supports the foot operating body so that the above foot operation can move freely, a slide body that can reciprocate in conjunction with the operation of the foot operating body, a lower member provided with a first roller body, a rotating means of the lower member, and a second roller body that slides and is attached to the opening door are provided. The first roller body and the second roller body are arranged so as to be slidable with their respective rotation axes intersecting at a predetermined angle, and the rotating means of the lower member is configured to be able to rotate the lower member in conjunction with the reciprocating operation of the slide body.

[0017] The rotation axis of the first roller body and the rotation angle of the second roller body need to be determined so that the rotational movement of the first roller body in the restoring (returning) direction that occurs after rotating the first roller body, and the driven movement of the second roller body attached to the opening door accompanying it are appropriately performed.

[0018] In addition, the contact surfaces of the rollers in the first roller body and the second roller body are a flat surface, a tire-like shape having an inclined surface (which may be either a flat surface or a curved surface) whose height gradually increases from both ends toward the center in the width direction, an umbrella-like shape having an inclined surface whose height gradually decreases in the width direction from one end, and a shape combining the above shapes, etc. It is preferable to determine them so that the rolling of the first roller body and the second roller body is performed smoothly.

[0019] In addition, the foot-operated body is a member such as a pedal that can operate based on operations in the vertical, left-right, and front-back directions by the foot, and its form, position, etc. can be appropriately determined. Furthermore, the movement (operation) of the foot-operated body means an up-and-down movement in the vertical direction, a slide movement in the left-right direction, a slide movement in the front-back direction, etc., and it will vary depending on the mode of the foot-operated body. Note that the foot-operated body is configured to return to the state before the start of the operation once the operation is started.

[0020] The opening and closing device of this hinged door includes a slide body that can reciprocate in conjunction with the operation of the foot-operated body, and a rotation means for the lower member that is configured to be able to rotate the lower member in conjunction with the reciprocating movement of the slide body. Therefore, by operating the foot-operated body and using the rotation means of the lower member, the lower member can be rotated (rotated in a predetermined direction and in the opposite direction) through the reciprocating slide movement of the slide body, and the lower member can be moved to an appropriate position. Then, by moving the driven member attached to the hinged door along the lower member, the hinged door can be automatically opened and closed.

[0021] In addition, in the opening and closing device of this hinged door, the foot-operated body support member has an inclined surface, the base end portion of the foot-operated body is pivotally supported at the top of the inclined surface, and the rotation means of the lower member includes an interlocking mechanism for interlocking the operation of the foot-operated body and the reciprocating movement of the slide body, a rack provided on the slide body, and a pinion gear attached to the lower member and meshing with the rack. If it has these, it can be simply configured, so it is suitable.

[0022] Further, in the opening / closing device of the present opening door, the interlocking mechanism includes a first link member having one end attached to the foot operation body support member, a second link member having one end attached to the slide body, and biasing means for applying a biasing force to the slide body in a direction resisting the sliding operation of the slide body when the foot operation body descends. The first link member can be pressed by the foot operation body (either directly or indirectly via another member), and if the other end of the first link member and the other end of the second link member are rotatably connected, it is suitable because the slide body can be slid with a simple configuration.

[0023] Here, the first link member and the second link member only need to be able to form a link mechanism, and their forms can be determined as appropriate. For example, a crescent-shaped piece, a rectangular-shaped piece, a rod member, etc. can be used for the first link member and the second link member.

[0024] Further, in the opening / closing device of the present opening door, the interlocking mechanism has a cam member. The cam member is rotatably supported by the foot operation body support member at the shaft support portion, and a part of the cam member can press the slide body (either directly or indirectly via another member). Further, if the cam member can be pressed by the foot operation body, it is suitable because the slide body can be slid with a simple configuration.

[0025] Here, the cam member is preferably a plate cam. The plate cam is a cam body in a plate shape formed in a fan shape, an oval shape, an eccentric circular shape, etc. (however, there is no limitation on the shape as long as it can realize a desired motion). Also, it is necessary that at least a part of the cam member (in the case of a plate cam, the peripheral portion) can transmit a pressing force while contacting the slide body (it may be a member that presses the sliding portion while sliding with a part of the slide body).

[0026] Furthermore, in the opening / closing device of the opening door, an urging force adjusting means for adjusting the urging force of the urging means may be provided.

[0027] According to the opening / closing device of the opening door, without removing the entire device, by simply adjusting the urging force of the urging means, the opening / closing speed of the opening door can be adjusted. Also, since the urging force can be adjusted according to the weight of the opening door, the versatility can be enhanced.

[0028] Also, in the opening / closing device of the opening door, a rotational force assisting means for assisting the rotational force acting on the lower member at the start of the operation of the foot operating body may be provided. Note that, if a structure is adopted in which the opening door is supported by the rotation axis of the lower member, it is preferable because the load caused by the weight of the door panel or the like acting on the end face cam body, the driven member, the first roller body, and the second roller body can be reduced.

[0029] For example, as the rotational force assisting means, an urging means such as a spring that always applies an urging force in a direction approaching the opening door from above or below the end face cam body can be used. However, the rotational force assisting means is particularly useful when the weight of the opening door is heavy, and it is not necessarily required when the opening / closing device of the opening door is used for an opening door that is lightweight.

[0030] According to the opening / closing device of the opening door, since the lower member is provided with a rotational force assisting means for assisting the rotational force of the lower member at the start of the operation of the foot operating body, even when the weight of the opening door is heavy, it is possible to assist the rotational force of the lower member and rotate it smoothly.

[0031] Also, in the opening / closing device of this opening door, when performing a return operation to the state at the start of the operation of the foot operating body, braking means for applying a braking force (which may be both) to at least one of the slide body, the end face cam body, the driven member, or each roller body is provided. Then, when the foot operating body ascends, the sliding operation of the slide body and the rotation of the end face cam body can be braked, and when closing the door, the closing operation of the opening door can be performed gently. Therefore, it is possible to prevent the user from colliding with the opening door, which is preferable. Note that as the braking means, various dampers (regardless of whether they are linear dampers, rotary dampers, etc.) can be used.

Effect of the Invention

[0032] According to the present invention, it is possible to provide an opening / closing device for an opening door that has a simple structure and can be self-closed and self-opened by a simple operation.

Brief Description of the Drawings

[0033]

Figure 1

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Figure 21

Embodiments for Carrying Out the Invention

[0034] Hereinafter, with reference to the drawings, an embodiment of the present opening door opening / closing device will be described in detail. In the description of the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted. In the following description, when referring to the front-back, left-right directions, Fig. 1 is used as a reference. In that case, the front-back direction is such that the direction of the right panel R along the upper frame W is the front direction and the direction of the left panel L is the rear direction, and the left-right direction is such that the direction toward the front of the paper is the left direction and the direction toward the back of the paper is the right direction. Also, each component can be appropriately changed, and the description of the detailed structure that is not directly related to the present invention is omitted.

[0035] [Mounting Location of the Present Opening Door Opening / Closing Device] In this embodiment, it is assumed that the present opening door opening / closing device H is provided in a toilet booth (Fig. 1).

[0036] This toilet booth is partitioned into a rectangular space in plan view by two horizontal partition panels (not shown) installed vertically from the wall and left and right panels L, R (support members) installed in a direction orthogonal to the horizontal partition panels with a predetermined opening provided to form an entrance portion. Also, an upper frame W is horizontally installed on the upper surfaces of the left panel L and the right panel R. And at the entrance portion, a door panel D (opening / closing body), which is an opening door, is rotatably attached by being supported by the upper frame W using a known hinge C at the upper end portion on the hinge side.

[0037] Note that the door panel D is of a type that opens to the inside (toilet side) of the toilet booth, and is configured not to open outward more than when the entrance is closed, that is, the door panel D is configured to rotate within a range of about 90 degrees.

[0038] Also, on the door tip side of the right panel R, a known foot-operated lock J is attached to the lower corner portion on the inner surface of the toilet booth. By stepping on the pedal portion J1 of the foot-operated lock J and switching the protrusion and retraction (movement to the right panel R side) of the locking body J2 to the door panel D side, the door panel D can be locked and unlocked.

[0039] [Configuration of the double-opening door opening / closing device] (First Embodiment) The double-opening door opening / closing device H of the first embodiment mainly includes a cover 10, a foot operation portion 20, a slide body 40, a rotating portion 50, and a lower member rotating means 60 (FIGS. 2 and 3).

[0040] (Cover) The cover 10 is formed from an upper plate 11, a bottom plate 12, and a side plate 13 provided only on one side surface. The upper plate 11 has an L shape, and a mounting hole 11a for the end face cam body 53 is formed in the protruding portion on the opening side. Further, the bottom plate 12 has a shape in which a trapezoidal portion is provided in a portion having the same shape as the upper plate 11, and a rectangular side plate 13 is attached so that a part of the upper plate 11 and the bottom plate 12 overlap in a top view. Note that a mounting hole 12a for the rotating shaft 55 is also formed in the bottom plate 12 at a position corresponding to the mounting hole 11a of the upper plate 11.

[0041] (Foot operation portion) The foot operation portion 20 mainly includes a pedal 21 (foot operation body) and a pedal support 31 (foot operation body support member) that supports the pedal 21 so that the tip portion is movable up and down (movable).

[0042] The pedal support 31 is formed by an inclined portion 32 that slopes forward, a rectangular parallelepiped portion 36 provided at the rear of the inclined portion 32, and a lower member attachment portion 37 provided on the side surface of the inclined portion 32 (Figs. 4(a) and (b)).

[0043] The inclined portion 32 includes a tip portion 33 formed in a substantially semicircular shape and an elongated portion 34, and a triangular portion 35 that is provided laterally of the tip portion 33 and is substantially triangular is integrally formed. The tip portion 33 and the elongated portion 34 are formed in a shape approximating that of the pedal 21. Further, a link member mounting groove 34a for mounting the first link member 62 and the second link member 63 is formed throughout the longitudinal direction of the elongated portion 34. The link member mounting groove 34a is formed in a crank shape with a wide central portion. On both sides in the vicinity of the tip portion 33, locking long grooves 34b for locking the first link member 62 are provided. On both sides in the vicinity of the rectangular parallelepiped portion 36, attachment long grooves 34d for attaching the second link member 63 are provided in the vertical direction. Further, the portion from the attachment long groove 34d to the end on the rectangular parallelepiped portion 36 side in the side surface of the link member mounting groove 34a is open (not shown). Note that openings 36b are formed at two locations on the upper surface of the rectangular parallelepiped portion 36.

[0044] A cylindrical hole 37a is provided throughout the height direction at a location near the center of the lower member attachment portion 37. Note that there is no hole wall on the inner side of the cylindrical hole 37a, and when the following pinion gear 72 is attached, the pinion gear 72 is exposed. Further, an attachment hole 37b for the upper plate 11 of the cover 10 is formed near the side edge portion of the lower member attachment portion 37, and an attachment hole 37c for the vertical plate 89 is formed at the rear end portion.

[0045] Furthermore, the inclined portion 32 and the rectangular parallelepiped portion 36 have a width dimension corresponding to the shape of the following slide body 40, and a hollow portion 38 having a shape corresponding to the length of the slide range is formed. The slide body 40 can be inserted into the hollow portion 38. On the longitudinal rear wall surface inside the hollow portion 38, two circular holes 36a for attaching the following biasing force adjusting means 65 are arranged side by side.

[0046] The pedal 21 has a substantially mountain-shaped bread shape, and protruding portions 21b at both ends of the end side facing the front arc portion 21a are pivotally supported by locking portions 32a formed at the upper parts of the left and right rear ends of the elongated portion 34 in the inclined portion 32 of the pedal support 31. By stepping on the arc portion 21a, the pedal 21 can pivot up and down with the left and right locking portions 32a as fulcrums and can perform a lifting operation.

[0047] (Slide body) The slide body 40 includes a base portion 41 and a rack attachment portion 42 ((FIGS. 5(a) and (b)). The base portion 41 is symmetric about a vertical axis in a top view, and an inclined surface 41a is provided on the front surface. And in the longitudinal direction on the rear surface of the inclined surface 41a, two spring attachment portions 41b are arranged side by side. The spring attachment portion 41b has a curved surface portion corresponding to the cylindrical shape of the biasing spring 64 (biasing means).

[0048] A slit 41c for providing the first link member 62 and the second link member 63 is formed at the central portion in the longitudinal direction of the base portion 41, and locking long grooves 41d for locking the second link member 63 are formed on both sides of the rearward side at the center of the slit 41c. Also, at the tip of the right side portion of the base portion 41, a rectangular parallelepiped-shaped rack attachment portion 42 is provided continuously with the inclined surface 41a.

[0049] A rack 71 is provided on the outer surface portion of the rack attachment portion 42 over the entire longitudinal direction. In addition, a first damper mounting groove 43 is continuously formed in the longitudinal direction on the lower surfaces of the base portion 41 and the rack mounting portion 42, and a second damper mounting groove 44 is formed in the longitudinal direction of the other base portion 41.

[0050] The slide body 40 is slidably mounted in the hollow portion 38 of the pedal support body 31 with the link member mounting groove 34a of the pedal support body 31 and the position of the slit 41c aligned and the biasing spring 64 interposed therebetween. An urging force adjusting means 65 is provided at the base end portion of the biasing spring 64.

[0051] The urging force adjusting means 65 is provided at the rear end portion of the biasing spring 64 and includes a cross-shaped portion 66 and a screw portion 67 provided at the rear portion of the cross-shaped portion 66 (FIGS. 6(a), (b), FIGS. 8(a), (b)). The cross-shaped portion 66 of the urging force adjusting means 65 is inserted into the circular hole 36a of the rectangular parallelepiped portion 36 of the pedal support body 31 and is attached by the screw portion 67. The base end portions of the two biasing springs 64 have the hollow portions inserted into the cross-shaped portion 66. By operating the screw portion 67, the position of the pressing body 66 is changed, the length of the biasing spring 64 is adjusted, and the magnitude of the urging force of the biasing spring 64 can be appropriately set.

[0052] (Rotating portion) The rotating portion 50 mainly includes a lower member 51 having an end face cam body 53 and a cylindrical portion 52, a rotation shaft 55 of the end face cam body 53, and a rolling roller 81 (a driven member, a roller body) that is attached to the door panel D and follows along the inclined cam surface 53a of the end face cam body 53.

[0053] The lower member 51 includes a cylindrical portion 52 and an end face cam body 53 at the upper end face of the cylindrical portion 52. The end face cam body 53 is flat and has an inclined cam surface 53a formed in a deformed cylindrical shape obtained by cutting a cylinder with a smaller diameter than the cylindrical portion 52 in an oblique direction on its upper surface. The inclined cam surface 53a has its highest peak 53b and lowest valley 53c at positions that are point-symmetrical with respect to the rotation center, and is formed so as to have a continuous gradient until reaching the highest peak 53b and the lowest valley 53c (Figs. 8(a) and (b)).

[0054] Also, at the lower end portion of the end face cam body 53, a pinion gear 72 that meshes with the rack 71 of the slide body 40 is provided (Figs. 6(a) and (b)). The pinion gear 72 is formed on the circumferential surface of the lower edge of a cylindrical body 73, and the cylindrical body 73 is integrated by being inserted into the cylindrical portion 52 of the end face cam body 53.

[0055] Note that the inclination angle of the inclined cam surface 53a is determined by the magnitude of the biasing force of the following biasing spring 64 and the magnitude of the damping force of the first damper 68. During the door closing operation, when the following rolling roller 81 rolls on the inclined cam surface 53a, the rotational position of the highest peak 53b of the end face cam body 53 needs to be appropriately set so as not to exceed the position of the rolling roller 81 and reach the front. Also, the rotation angle of the end face cam body 53 varies depending on the specifications of the rack 71 and the pinion gear 72. In this embodiment, the end face cam body 53 rotates approximately 120 degrees by the sliding operation of the slide body 40 in one direction.

[0056] The end face cam body 53 is arranged such that the inclined cam surface 53a faces upward and is inserted into the cylindrical hole 37a of the lower member mounting portion 37 in the pedal support body 31. Then, at the position of the mounting hole 12a on the bottom plate 12 of the cover 10, the rotation shaft 55 is vertically provided on the bottom plate 12 so that the center of the cylindrical hole 37a of the lower member mounting portion 37 coincides. The end face cam body 53 is pivotally supported with respect to the rotation shaft 55 via a thrust bearing 54 so as to be rotatable. The rotation shaft 55 is attached from below the bottom plate 12 using bolts 91 by means of a mounting fitting 56 provided at the end.

[0057] Further, on the lower surface of the end face cam body 53, a biasing spring 57 (biasing means) for adding the rotational force of the end face cam body 53 when the pedal 21 descends is provided. The biasing spring 57 is provided such that the rotation shaft 55 is inserted through the hollow portion and the upper end portion abuts against the lower surface of the end face cam body 53, and can constantly apply an upward biasing force to the end face cam body 53.

[0058] The door panel mounting portion 80 includes a rolling roller 81, a mounting fitting 82, a thrust bearing 87, and a bearing mounting frame 88 (FIG. 7). The mounting fitting 82 is formed in a hat shape with a high peak in side view, and includes a convex portion 83, door panel mounting portions 84 and 85 on both sides, and side plates 86 attached to two opposing sides of the convex portion 83. A bearing mounting frame 88 is provided on each side plate 86 of the mounting fitting 82.

[0059] The bearing mounting frame 88 is a hollow rectangular parallelepiped box body, and a spherical crown hole 88a is formed on the bottom surface. Inside the bearing mounting frame 88, a thrust bearing 87 is rotatably provided such that the center thereof coincides with the position of the spherical crown hole 88a. Further, on the inner surface of the convex portion 83 of the mounting fitting 82 on the door edge side, the rolling roller 81 is pivotally supported so as to have a rotation axis in the horizontal direction. The tip end portion of the rotation shaft 55 through which the end face cam body 53 is inserted is inserted into the spherical crown hole 88a of the bearing mounting frame 88 and contacts the lower surface of the thrust bearing 87, and the door panel D can be supported by the rotation shaft 55.

[0060] An elliptical columnar hole portion D1 is formed at the lower surface edge portion of the door panel D, and the convex portion 83 of the mounting fitting 82 in the door panel mounting portion 80 is inserted into the hole portion D1 and screwed to the door panel mounting portions 84 and 85, so that it can be attached to the lower surface of the door panel D.

[0061] Further, the rolling roller 81 is capable of rolling along the inclination of the inclined cam surface 53a of the end face cam body 53. Along with the operation of the rolling roller 81, the door panel D to which the rolling roller 81 is attached can operate together with the rolling roller 81.

[0062] (Lower member rotation means) The lower member rotation means 60 is means for rotating the lower member 51 (particularly, the end face cam body 53) in conjunction with the reciprocating motion of the slide body 40, and includes an interlocking mechanism 61 for interlocking the lifting and lowering motion of the pedal 21 with the reciprocating motion of the slide body 40, the rack 71 described above, and a pinion gear 72 that meshes with the rack 71.

[0063] The interlocking mechanism 61 includes a first link member 62, a second link member 63, a biasing spring 64, a first damper 68, and a second damper 69 (braking means). The first link member 62 and the second link member 63 are formed in the same substantially crescent shape, with mounting holes 62a, 63a formed at one end and thin annular protrusions 62b, 63b provided at the other end.

[0064] The first link member 62 and the second link member 63, which have the same shape, are connected with their front and back sides reversed and their back sides facing each other, by inserting a connecting pin 58 through the holes formed in the protrusions 62b, 63b of both. Further, the first link member 62 has a mounting pin 59 inserted through the mounting hole 62a, and the mounting pin 59 is slidably suspended in the locking long grooves 34b on both sides of the pedal support 31. Also, the second link member 63 has a mounting pin 59 inserted through the mounting hole 63b, and the mounting pin 59 is slidably suspended in the locking long grooves 41d on both sides of the slide body 40. And the upper edge portion of the first link member 62 is provided so as to be slidable within a predetermined range while abutting on the lower surface of the pedal 21.

[0065] The biasing spring 64 is a member for applying a biasing force to the slide body 40 in a direction resistant to the sliding movement of the slide body 40 when the pedal 21 descends. As described above, one end of the biasing spring 64 is attached to the tip of the spring attachment portion 41b, and the other end is attached to the circular hole 36a of the rectangular parallelepiped portion 36 in the pedal support 31. Due to this biasing spring 64, a biasing force is constantly applied to the slide body 40 in the direction of the inclined surface 41a side of the slide body 40 (the direction resistant to the sliding movement of the slide body 40 when the pedal 21 descends).

[0066] With the above configuration, the first link member 62 and the second link member 63 are pivotally connected (shaft-supported) rotatably with the positions of the protrusions 62b, 63b as fulcrums and the connecting pin 58 as a pivot shaft. Regarding the mutual operations of the pedal 21 and the slide body 40, one operation can be made to follow the other operation, and the operations of both members can be interlocked.

[0067] The slide body 40 is provided with a first damper 68 for applying a braking force resistant to the sliding force and the biasing force acting when the pedal 21 of the foot operation portion 20 ascends, and a second damper 69 acting when the pedal 21 of the foot operation portion 20 is depressed.

[0068] That is, in the above case, when the end face cam body 53 rotates counterclockwise with respect to the rotation shaft 55, a slide force changed from the rotational force acts on the slide body 40 by the pinion gear 72 and the rack 71. The first damper 68 is an element provided to apply a braking force resistant to the rotational force acting on the end face cam body 53 and the slide force of the slide body 40 to the slide body 40. The rod is arranged in a direction in contact with the rear surface of the slide body 40 and is inserted into the first damper attachment groove 43.

[0069] The second damper 69 is provided so that the pedal 21 can be depressed gently when depressed. Therefore, the rod is arranged in a direction in contact with the rear surface of the inclined surface 41a of the slide body 40 so that a resistance force resistant to the downward force of the pedal 21 is applied, and is inserted into the second damper attachment groove 44.

[0070] (Mounting mode, etc.) Each of the above components is disposed at a predetermined position and is clamped by bolts 94 and nuts 95 (Figs. 7, 9(a), (b), 10) provided at a predetermined location between the upper plate 11 and the bottom plate 12 of the cover 10. And the present opening door opening / closing device H is attached to the lower corner portion of the left panel L by a vertical plate 89 attached to the rear surface of the pedal support 31 of the foot operation portion 20.

[0071] In the present opening door opening / closing device H having the above configuration, due to the actions of the first link member 62, the second link member 63, and the biasing spring 64, the slide body 40 is slidable in the front-rear direction (reciprocating operation is possible) in conjunction with the lifting operation of the pedal 21.

[0072] That is, the first link member 62 abuts against the lower surface of the pedal 21 and can be pressed by the pedal 21. When the pedal 21 is stepped on, a downward pressing force acts, causing the biasing spring 64 to contract. As the first link member 62 moves downward while sliding on the lower surface of the pedal 21, the second link member 63 can also move downward with the positions of the protrusions 62b and 63b as fulcrums (Figs. 8(a), 9(b)). Also, when the foot is released from the pedal 21, the biasing spring 64 extends, the second link member 63 moves upward, and with the positions of the protrusions 62b and 63b as fulcrums, the first link member 62 also moves upward and returns forward so that the pedal 21 can rise (Figs. 8(b), 10).

[0073] Further, due to the operation of the pinion gear 72 that meshes with the rack 71 of the slide body 40, when the rack 71 slides rearward, the end face cam body 53 rotates clockwise, and when the rack 71 slides forward, the end face cam body 53 rotates counterclockwise. Then, along the inclined cam surface 53a of the end face cam body 53, the rolling roller 81 rolls, and since the door panel D integrated with the rolling roller 81 also rotates simultaneously, the door panel D to which the present open door opening / closing device H is attached is opened and closed in conjunction with the operation of the end face cam body 53.

[0074] [Operation of the present open door opening / closing device] Subsequently, the operation of the present open door opening / closing device H will be described. Note that the present open door opening / closing device H is attached to the lower corner portion on the right panel R side in the left panel L.

[0075] In the following description, it is assumed that in the open door state (maximum open door angle), the door panel D is at a position rotated 90 degrees inward of the toilet booth with respect to the entrance (FIG. 11). In this case, the highest peak 53b of the end face cam body 53 is on the side of the right panel R, taking into account the margin angle during operation in order to ensure the reliable operation of the door panel D, and is in a direction slightly separated outward from the direction parallel to the right panel R (in a plan view, the direction in which the angle formed by the contact portion with the rolling roller 81 and the highest peak 53b of the end face cam body 53 is an obtuse angle).

[0076] Also, the rolling roller 81 is in a direction perpendicular to the left panel L and in the inner direction of the toilet booth, and is in contact with the inclined cam surface 53a of the end face cam body 53. In the above open door state, since the rolling roller 81 is located near the lowest valley portion 53c of the inclined cam surface 53a, the rolling roller 81 is in a state where it does not rotate.

[0077] (When closing the door) The case of closing the door panel D will be described. When the pedal 21 of the foot operation part 20 of the opening / closing device H of the opening door is depressed to cause it to descend, the connecting part of the first link member 62 and the second link member 63 is pressed by the pedal 21 and moves downward. In conjunction with this, the rear end of the second link member 63 moves to the rear surface, and the slide body 40 slides rearward. At this time, since the rack 71 provided on the slide body 40 moves rearward, the pinion gear 72 meshing with the rack 71 also rotates (FIGS. 6(b), 8(b), FIG. 10). Then, the end face cam body 53 rotates about 120 degrees clockwise around the rotation shaft 55, and the position of the highest peak part 53b of the inclined cam surface 53a of the end face cam body 53 passes through the position of the open door state of the rolling roller 81 (FIG. 12).

[0078] At this time, since a biasing spring 57 provided below the end face cam body 53 applies an upward biasing force to the end face cam body 53, the end face cam body 53 rotates smoothly against the self-weight of the door panel D.

[0079] In this state, when the foot is released from the pedal 21 and the depression is stopped, the slide body 40 is pressed against the front surface by the biasing force of the biasing spring 64, and the rack 71 of the slide body 40 moves forward. Along with this, the pinion gear 72 rotates in the reverse direction to the above case, and the end face cam body 53 starts to rotate counterclockwise around the rotation shaft 55. And as the slide body 40 is pressed against the front surface, the connecting part of the second link member 63 and the first link member 62 moves forward and upward, and pushes up the pedal 21 from the lower surface.

[0080] At the same time, due to the action of the self-weight of the door panel D, the rolling roller 81 moves along the inclined cam surface 53a of the end face cam body 53 that is inclined downward, and rotates in the same direction as the end face cam body 53. Along with this, the door panel D that operates integrally with the rolling roller 81 rotates in the closing direction (FIG. 13). After that, in a state where the door panel D completely closes the entrance part (FIG. 14), the pedal part J1 of the foot-operated lock J is operated, and the locking body J2 is projected toward the door panel D side to perform locking.

[0081] In the above operation, when the end face cam body 53 rotates counterclockwise, due to the action of the first damper 68, a braking force acts on the rotational force of the end face cam body 53 and the sliding force of the slide body 40. Therefore, compared with when the pedal 21 is depressed (lowered), the rotational speed becomes gentle. Accordingly, the rotational speed of the end face cam body 53 becomes slower compared with the rotational speed of the door panel D that depends on the speed of the rolling roller 81.

[0082] Note that the movement of the door panel D stops at a position parallel to the right panel R which is the rotation limit. However, after closing the door, the end face cam body 53 returns to the position before the pedal 21 was depressed by the biasing force of the biasing spring 64. Therefore, the position of the highest peak 53b of the inclined cam surface 53a passes through the position of the rolling roller 81 and returns to the position before the above operation.

[0083] (When opening the door) With the door panel D closing the entrance, the pedal part J1 of the foot-operated lock J is operated to retract the locking body J2 to the right panel R side to unlock (Fig. 15).

[0084] At this time, the rolling roller 81 is located in the inner direction of the toilet booth compared with the highest peak 53b of the end face cam body 53 and cannot cross over the highest peak 53b of the end face cam body 53. Therefore, the rolling roller 81 moves along the inclined cam surface 53a in the inner direction of the toilet booth of the end face cam body 53 which is inclined downward and rotates clockwise. Accordingly, without performing any special operation, the rolling roller 81 returns to the position in the open door state, and the door panel D integrated with the rolling roller 81 is opened and returns onto the present opening door opening / closing device H.

[0085] [Function and effect of the present opening door opening / closing device] The opening and closing device H of this opening door is configured to be able to rotate an end face cam body 53 in conjunction with the reciprocating motion of a slide body 40 that can reciprocate, in conjunction with the lifting motion of a pedal 21, and includes a lower member rotating means 60. This lower member rotating means 60 has a linkage mechanism 61 for linking the lifting motion of the pedal 21 and the reciprocating motion of the slide body 40. Further, this linkage mechanism 61 includes a first link member 62, a second link member 63, and a biasing spring 64. The lower member rotating means 60 includes a rack 71 provided on the slide body 40 and a pinion gear 72 attached to the end face cam body 53 and meshing with the rack 71.

[0086] Therefore, by lowering the pedal 21, the slide body 40 can be slid by the action of the first link member 62 and the second link member 63. Then, by meshing the rack 71 provided on the slide body 40 with the pinion gear 72, the end face cam body 53 can be rotated to a predetermined position, and its inclined cam surface 53a can be moved to an appropriate position. Also, by releasing the pressing of the pedal 21, the slide body 40 can be slid in the opposite direction by the action of the biasing spring 64, and the end face cam body 53 can be rotated in the opposite direction by the operation of the rack 71 and the pinion gear 72.

[0087] At this time, since the rolling roller 81 is located near the highest peak 53b of the inclined cam surface 53a, due to the self-weight of the door panel D, the rolling roller 81 attached to the door panel D can be moved along the inclined cam surface 53a of the end face cam body 53, so that the door panel D can be automatically opened or closed. Thus, according to the present invention, it is possible to provide an opening and closing device H for this opening door that has a simple structure and can be automatically closed and opened by a simple operation of the pedal 21.

[0088] In addition, according to the opening / closing device H of this opening door, a biasing spring 57 is provided at the upper end thereof which abuts against the lower surface of the end face cam body 53 and constantly applies an upward biasing force to the end face cam body 53. Therefore, since the end face cam body 53 can be rotated by the combined force of the rotational force of the pinion gear 72 acting on the end face cam body 53 and the upward biasing force of the biasing spring 57, even when the weight of the door panel D is heavy, it is possible to smoothly rotate the end face cam body 53.

[0089] In addition, in the opening / closing device H of this opening door, when the pedal 21 is raised (when the slide body 40 moves forward), a first damper 68 for applying a braking force to the slide body 40 is provided. Therefore, when the pedal 21 is raised, the rotational operation of the end face cam body 53 and the sliding operation of the slide body 40 can be suppressed, and the closing operation of the door panel D can be gently performed, thereby preventing the user from colliding with the door panel D or the like.

[0090] In addition, the opening / closing device H of this opening door includes an urging force adjusting means 65, so that the opening / closing speed of the door panel D can be adjusted by simply adjusting the urging force of the urging spring 64 without removing the entire device. Further, since the urging force can be adjusted according to the weight of the door panel D, the versatility can be enhanced.

[0091] In addition, according to the opening / closing device H of this opening door, the door panel D (opening door) is locked and unlocked using a separately attached foot-operated lock J (locking device). Therefore, even if someone deliberately operates the opening / closing device H of this opening door and exits from the outside of the toilet booth, the door panel D will not open automatically, and unintentional operations of the door panel D can be prevented.

[0092] [Other Embodiments of the Opening Door Opening / Closing Device] (Second Embodiment) Subsequently, the opening / closing device H' of the second embodiment of this opening door will be described. The double - leaf door opening and closing device H' of the second embodiment and the double - leaf door opening and closing device H of the first embodiment differ only in the rotational force assisting means that constitutes the lower - side member rotating means 60' (in the following description, when explaining the double - leaf door opening and closing device H and its components of the first embodiment A, the name "of the first embodiment A" may be attached to each component and the like).

[0093] That is, the rotational force assisting means of the first embodiment is configured as a biasing spring 57 provided on the lower surface of the end - face cam body 53. On the other hand, the rotational force assisting means of the double - leaf door opening and closing device H' is provided on the door panel mounting portion 80'. Regarding other components, since they are the same as those of the opening and closing device H of the double - leaf door of the first embodiment, only the door panel mounting portion 80' which is the difference will be described (the reference numeral 50' in FIG. 16 indicates the rotating portion).

[0094] The door panel mounting portion 80' includes a mounting bracket 82', a rolling roller 81' (rolling member), a thrust bearing 87', a biasing spring 57', and a biasing - spring mounting member 88' (FIG. 16). The mounting bracket 82' is formed in a mountain - shaped hat shape in side view, and includes a convex portion 83', door panel mounting portions 84', 85' on both sides, and a cylindrical portion 86' for winding the biasing spring 57'.

[0095] The convex portion 83' of the mounting bracket 82' is formed with a longer vertical length compared to the case of the first embodiment, and a cylindrical portion 86' is provided below the inner top surface. Also, a mounting hole 83a' for attaching the rolling roller 81' is formed on the inner surface of the convex portion 83' on the door - edge side. The biasing - spring mounting member 88' has a groove shape, a circular hole 88a' is formed in the web portion when the opening is horizontal, and a mounting hole 88b' for the rolling roller 81' is formed in one flange portion.

[0096] The horizontal rotation axis 81a' of the rolling roller 81' is attached to both holes with screws 93 in a state where the mounting hole 83a' of the convex portion 83' and the mounting hole 88b' of the booster spring mounting member 88' are aligned. The rolling roller 81' is pivotally supported on the rotation axis 81a'.

[0097] A booster spring 57' is wound around the cylindrical portion 86' of the mounting bracket 82'. The lower end portion of the booster spring 57' is attached to the auxiliary spring mounting member 88' in such a manner that it can always apply an upward biasing force, and can apply an upward biasing force to the end face cam body 53. Also, a thrust bearing 87' is attached to the lower end portion of the cylindrical portion 86'. The upper tip portion of the rotation axis 55 is in contact with the lower surface of the central portion of the thrust bearing 87', and the door panel D can be supported by the rotation axis 55.

[0098] Also, in the present opening door opening / closing device H', since the booster spring 57' can always apply an upward biasing force to the end face cam body 53, the same operational effects as those of the present opening door opening / closing device H of the first embodiment can be achieved.

[0099] (Third Embodiment) The present opening door opening / closing device H” of the third embodiment is configured such that a second rolling roller 81” (second roller body) is provided on the door panel D, and a first rolling roller 53” (first roller body) is used instead of the inclined cam body as a main component of the lower member 51”. The first rolling roller 53” and the second rolling roller 81” are arranged such that their respective rotation axes intersect at a predetermined angle in a top view, and the rolling surfaces of the first rolling roller 53” and the second rolling roller 81” are configured to slide. That is, the rotation axis of the first rolling roller 53” is arranged to be orthogonal in a top view with respect to the rotation axis of the second rolling roller 81” when the pedal 21 is at its highest position (hereinafter, this position is referred to as the “reference position”) (FIG. 17). Further, when the pedal 21 is at its lowest position, it is arranged to be at a position rotated 90 degrees to 120 degrees from the reference position with respect to the rotation axis of the second rolling roller 81” (in this embodiment, it is assumed to rotate clockwise) (FIG. 18).

[0100] Note that the first rolling roller 53” is configured to be rotatable by means similar to the lower member rotation means of the first embodiment (reference numeral 50” indicates the rotating part and 55” indicates the rotation axis, respectively).

[0101] In this opening door opening / closing device H”, after rotating the first rolling roller 53” by a predetermined angle, rotation in the restoring direction of the first rolling roller 53” is caused, and the first rolling roller 53” is rotated to change the direction of the contact surface with the second rolling roller 81” in an oblique direction, thereby enabling the driven operation of the second rolling roller 81” (the sliding operation of the rolling surface of the second rolling roller 81” with respect to the rolling surface of the first rolling roller 53”). Thus, according to this opening door opening / closing device H”, similar to the opening door opening / closing device H of the first embodiment using the end face cam body, the door panel D can be automatically opened and closed by the operations of the first rolling roller 53” and the second rolling roller 81”.

[0102] (Fourth Embodiment) The opening door opening / closing device H''' of the fourth embodiment and the opening door opening / closing device H of the first embodiment mainly differ in the interlocking mechanism 461 of the lower member rotation means 460, and accordingly, the forms of the pedal support 431 and the slide body 440 are different. Hereinafter, the description will focus on the differences.

[0103] On the pedal support 431, instead of the link member mounting groove 34a of the pedal support 31 in the first embodiment, a cam member mounting groove 434a for mounting a rear plate cam member 462 that forms an interlocking mechanism 461 is formed in the elongated portion 434 of the inclined portion 432. In the vicinity of the upper end portion in the cam member mounting groove 434a, a locking groove 434b for the shaft support portion 462b of the plate cam member 462 is formed, and in the substantially middle portion, a guide groove 434c for sliding the guide convex portion 462c of the plate cam member 462 is formed (FIG. 19).

[0104] Further, the cam body mounting groove 434a penetrates the pedal support 431, and the mounted plate cam member 462 can come into contact with the front surface on the left side where it is not close to the rack mounting portion 442 of the slide body 440 (FIGS. 21(a) and (b)).

[0105] The basic shape of the slide body 440 is substantially the same as that of the slide body 40 in the first embodiment (FIG. 20). However, in the double - leaf door opening / closing device H''', since the first link member 62 and the second link member 63 provided in the double - leaf door opening / closing device H in the first embodiment are not required, no slit is formed. Also, the second damper 69 is not provided.

[0106] The interlocking mechanism 461 has a sector - shaped plate cam member 462. The central angle of the plate cam member 462 is approximately 90 degrees. Shaft support portions 462b are formed so as to protrude on both surfaces of the main part (key part) of the plate cam member 462, and guide convex portions 462c are formed in an arc shape in the middle portion of the flat both surfaces so as to be parallel to the peripheral portion (arc) (FIG. 19).

[0107] The plate cam member 462 is rotatably supported in the cam member mounting groove 434a of the pedal support 431 such that the guide projection 462c is positioned in the guide groove 434c, and the shaft support portion 462b is attached to the locking groove 434b. The tip 462d of the peripheral edge of the plate cam member 462 can press the front surface of the slide body 440, and the other end 462e can contact and press against the lower surface of the pedal 21. With the above structure, the plate cam member 462 is rotatably supported by the pedal support 431 at the shaft support portion 462b, and the tip 462d of the peripheral edge of the plate cam member 462 can press the slide body 440 and can be pressed by the pedal 21.

[0108] In the initial state, the pedal 21 of the foot operation portion 20 in the double - opening door opening / closing device H''' is in contact with the other end 462e of the plate cam member 462. When the pedal 21 is depressed and lowered in this state, the other end 462e of the plate cam member 462 is pressed by the lower surface of the pedal 21 and moves downward. Then, the plate cam member 462 rotates about the shaft support portion 462b as a pivot, the tip 462d contacts the slide body 440 and applies a pressing force, and the slide body 440 moves backward in the direction of the acting pressing force. Thereafter, similar to the double - opening door opening / closing device H of the first embodiment, the lower member 51 (end face cam body 53) and the like are operated (Fig. 21(a)).

[0109] On the other hand, when the foot is released from the pedal 21 and the depression is stopped in this state, similar to the double - opening door opening / closing device H of the first embodiment, as the slide body 440 is pressed forward by the biasing spring 64, the plate cam member 462 rotates in the opposite direction to the above - mentioned case about the shaft support portion 462b as a pivot, pushes up the pedal 21 from the lower surface, and the plate cam member 462 and the pedal 21 return to the initial state (Fig. 21(b)). Thus, according to the double - opening door opening / closing device H''', with a reduced number of parts and a simple structure, the same operational effects as those of the double - opening door opening / closing device H of the first embodiment can be achieved.

[0110] As described above, an example of a preferred embodiment of the present invention has been explained. However, the present invention is not limited to the embodiment, and design changes can be made as appropriate without departing from the spirit of the present invention.

[0111] In particular, there is no limitation on the mounting location of the opening / closing device of the present opening door, and it can be appropriately determined in consideration of operability (including not being obstructive during operation, or the operator not colliding with the opening door, etc.) according to the location of mounting and the opening door or the like.

[0112] Also, there is no limitation on the form of the opening door for mounting, and it may be an opening door of a type that opens to the outside of the private room. In that case, the foot operating body of the opening / closing device of the present opening door needs to be mounted in a state of protruding to the outside of the private room.

[0113] In the opening / closing device of the present opening door of the above-described first embodiment and second embodiment, a roller body is used for the driven member. However, it is also possible to adopt a configuration in which a pair of second end face cam bodies having the same shape as the end face cam body are used for the driven member. In this case, it is preferably configured to have a cylindrical portion with an inclined cam surface formed on the end face, and the inclined cam surfaces are opposed to each other and arranged so as to be rotatably supported in a superposed state.

[0114] In the opening / closing device of the present opening door of the above-described first embodiment and second embodiment, a roller body is provided on the opening door and an end face cam body is provided on the lower member. However, it is also possible to adopt a configuration in which an end face cam body is provided on the opening door and a roller body is provided on the lower member.

[0115] Furthermore, for the foot operating body, foot operating body support member, slide body, end face cam body, and rotation means (link mechanism (first link member, second link member, biasing means and biasing force adjusting means, and cam member), braking means, and rotation force assisting means) described in the claims, various components can be used as long as they have a basic configuration and exhibit their operational effects.

Explanation of Reference Numerals

[0116] H, H’, H’’, H’’’ Open Door Opening and Closing Device D Door Panel J Foot-Operated Lock 10 Cover 20 Foot-Operated Part 21 Pedal (Foot-Operated Body) 31, 431 Pedal Support (Foot-Operated Body Support Member) 32, 432 Inclined Part 32a Locking Part 33 Tip 34a Link Member Mounting Groove 434a Cam Member Mounting Groove 37 Lower Member Mounting Part 40, 440 Slide Body 41 Base Part 42 Rack Mounting Part 50, 50’, 50” Rotating Part 51, 51” Lower Member 52 Cylindrical Part 53 End Face Cam Body 53” First Rolling Roller (First Roller Body) 53a Inclined Cam Surface 53b Highest Top 53c Lowest Valley 54 Thrust Bearing 55, 55” Rotating Shaft 57, 57’ Boosting Spring (Boosting Means) 60, 60’, 460 Lower Member Rotating Means 61, 461 Interlocking Mechanism 62 First Link Member 462 Plate Cam Member 63 Second Link Member 62a, 63a Mounting Holes 62b, 63b Protrusions 64 Biasing Spring (Biasing Means) 65 Biasing Force Adjusting Means 68 First Damper (Braking Means) 69 Second Damper (Braking Means) 71 Rack 72 Pinion Gear 80, 80’ Door Panel Mounting Part 81, 81' rolling roller (driven member, roller body) 81'' second rolling roller (second roller body) 82, 82' mounting bracket 88 bearing mounting frame

Claims

1. In a door opening / closing device for opening and closing a hinged door, a foot-operating body, a foot-operating body support member that supports the foot-operating body so that the foot-operating body is movable, a slide body that is reciprocally movable in conjunction with the operation of the foot-operating body, a lower member provided with an end face cam body having an inclined cam surface formed at a peripheral portion thereof, a rotating means for the lower member, and a driven member attached to the hinged door and driven along the inclined cam surface of the end face cam body, wherein the end face cam body in the lower member is rotatably supported such that the inclined cam surface faces upward, and the rotating means of the lower member is configured to be able to rotate the lower member in conjunction with the reciprocating motion of the slide body. A door opening / closing device for a hinged door, characterized by the above.

2. In a door opening / closing device for opening and closing a hinged door, an end face cam body attached to the hinged door and having an inclined cam surface formed at a peripheral portion thereof, a foot-operating body, a foot-operating body support member that supports the foot-operating body so that the foot-operating body is movable, a slide body that is reciprocally movable in conjunction with the operation of the foot-operating body, a lower member provided with a driven member that is driven along the inclined cam surface of the end face cam body, and a rotating means for the lower member, wherein the end face cam body is rotatably supported such that the inclined cam surface faces downward, and the rotating means of the lower member is configured to be able to rotate the lower member in conjunction with the reciprocating motion of the slide body. A door opening / closing device for a hinged door, characterized by the above.

3. The door opening / closing device according to claim 1 or claim 2, wherein the driven member is a roller body that slides on the inclined cam surface of the end face cam body.

4. The driven member is a second end face cam body having an inclined cam surface formed at a peripheral portion thereof, the end face cam body and the second end face cam body are formed in the same shape, and the end face cam body and the second end face cam body are rotatably supported in a state where their inclined cam surfaces face each other and are overlapped. The door opening / closing device for a hinged door according to claim 1.

5. The inclined cam surface in the end face cam body is The highest top and the lowest bottom are symmetric with respect to the rotation center, and are formed so as to have a continuous gradient from the highest top to the lowest bottom. The opening and closing device for a hinged door according to any one of claims 1 to 4, characterized by this.

6. In an opening and closing device for a hinged door for opening and closing a hinged door, a foot operating body, a foot operating body support member that supports the foot operating body so that the foot operating body can move freely, a slide body that can reciprocate in conjunction with the operation of the foot operating body, a lower member provided with a first roller body, a rotating means for the lower member, and a second roller body that slides and is attached to the hinged door. The first roller body and the second roller body are arranged so as to be slidable with their respective rotation axes intersecting at a predetermined angle, and the rotating means for the lower member is configured to be able to rotate the lower member in conjunction with the reciprocating operation of the slide body. The opening and closing device for a hinged door, characterized by this.

7. The rotating means for the lower member has an interlocking mechanism for interlocking the operation of the foot operating body and the reciprocating operation of the slide body, a rack provided on the slide body, and a pinion gear attached to the lower member and meshing with the rack. The opening and closing device for a hinged door according to any one of claims 1 to 6, characterized by this.

8. The interlocking mechanism has a first link member with one end attached to the foot operating body support member and a second link member with one end attached to the slide body, and biasing means for applying a biasing force to the slide body in a direction resistant to the sliding operation of the slide body at the start of the operation of the foot operating body with respect to the slide body. The first link member can be pressed by the foot operating body, and the other end of the first link member and the other end of the second link member are rotatably connected. The opening and closing device for a hinged door according to claim 7, characterized by this.

9. The opening and closing device for a hinged door according to claim 8, characterized by comprising biasing force adjusting means for adjusting the biasing force of the biasing means.

10. The interlocking mechanism has a cam member, the cam member is rotatably supported by the foot operating body support member at a shaft support portion, and at least a part of the cam member can press the slide body. ​ ​ ​ The opening / closing device for a hinged door according to claim 7, wherein the cam member can be pressed by the foot-operating body.

11. The opening / closing device for a hinged door according to any one of claims 1 to 10, further comprising a rotational force assisting means for assisting the rotational force acting on the lower member at the start of the operation of the foot-operating body.

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