WO2015135451A1 - Gate for Infant - Google Patents

Gate for Infant Download PDF

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Publication number
WO2015135451A1
WO2015135451A1 PCT/CN2015/073858 CN2015073858W WO2015135451A1 WO 2015135451 A1 WO2015135451 A1 WO 2015135451A1 CN 2015073858 W CN2015073858 W CN 2015073858W WO 2015135451 A1 WO2015135451 A1 WO 2015135451A1
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WO
WIPO (PCT)
Prior art keywords
door member
locking
frame
tip end
projected
Prior art date
Application number
PCT/CN2015/073858
Other languages
French (fr)
Inventor
Shigeyuki Aoki
Masaaki TOTANI
Original Assignee
Jiangsu Best Baby Car Seat Mfg. Co.,Ltd
Jiangsu Lucky Baby Safty System Mfg. Co.,Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Best Baby Car Seat Mfg. Co.,Ltd, Jiangsu Lucky Baby Safty System Mfg. Co.,Ltd filed Critical Jiangsu Best Baby Car Seat Mfg. Co.,Ltd
Publication of WO2015135451A1 publication Critical patent/WO2015135451A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B2009/002—Safety guards or gates

Definitions

  • This device relates to a gate for infant installed at an entrance of a room or at the stairs etc. in buildings such as houses or facilities for blocking passage of infants, pets and so on.
  • the locking arrangement comprises two lock pins positioned at both the upper and lower ends of the door member, a handle for retreating the lock pins simultaneously to release the locking state and a stopper for regulating the operation of the handle and is capable of releasing the locking state of the lock pins by operating the handle while retracting the stopper.
  • Patent Document 1 Patent Publication No. 2002-283927
  • the present device has been made to provide a gate for infant with high safety which can securely prevent the door member from being opened due to operation by an infant.
  • the gate for infant of the present device is constituted to be mounted on a floor surface in a building to close an opening between two attaching surfaces which are opposed to each other, comprising an approximately U-shaped frame attached to the attaching surfaces, a door member rotatably connected to the frame and a locking arrangement capable of regulating the opening of the door member from the frame, said frame comprising two side frames located at the sides of the attaching surfaces and a lower frame located at the side of the floor surface to connect the lower ends of the side frames to each other, said door member having an end rotatably connected to one of said side frames by a rotating axis part, and said locking apparatus is constituted to be capable of locking the tip end side part of the door member, which is the distal end of the rotating of the door member, to another of said side frames, wherein said locking apparatus comprises a first projected piece and a second projected piece projecting from the tip end side part of the door member to the side of side frame of the frame, a first locking hole and a second locking hole formed on the side frame to be capable
  • the locking apparatus for locking the door member to the frame comprises two projected pieces, among which the first projected piece is constituted to be capable of releasing the locking state to the first locking hole by operating the operating part located at the door member, and the second projected piece is constituted to be capable of releasing the locking state to the second locking hole only when the tip end side part of the door member is lifted while operating the operating part.
  • the locking of both of the first projected piece and the second projected piece cannot be released simultaneously, and thus cannot open the door member. Since such lifting operation of the door member is difficult for an infant who tends to focus only on the rotating operation, the door member can securely be prevented from being opened due to mistaken operation by an infant.
  • the door member can securely be prevented from being opened due to operation by an infant.
  • the second locking hole has an upper surface inclined upward toward an opening so as to guide said second projected piece moving upward as said door member moves upward. Therefore, the second projected piece is guided by the upper surface of the second locking hole to be released from the locking state to the second locking hole when the tip end side part of the door member is lifted. Since the locking state of the second projected piece to the second locking hole is thus released simply by lifting the tip end side part of the door member, the door member can be opened by an easy operation.
  • a locking pin which locks the lower end of the closed door member to the lower frame and can be released from the locking state when the tip end side part moves upward may preferably be positioned at the lower end of the tip end side part of the door member while being urged to be capable of maintaining the projected state from the door member.
  • the lower end of the closed door member can stably be locked to the frame by the locking pin. Furthermore, since the locking pin is urged to be capable of maintaining the projected state from the door member, the lower end of the door member can be locked to the lower frame by the urging force when the once-opened door member again becomes a closed state, thus providing superior operability.
  • Fig. 1 is a front view of the gate for infant of the present device installed at an entrance of a room.
  • Fig. 2 is a partial enlarged vertical sectional view of the gate for infant of an embodiment showing a locking pin for locking the tip end of the door member to the lower frame.
  • Fig. 3 is a partial enlarged vertical sectional view of a gate for infant of an embodiment showing a locking pin for locking the tip end of the door member to the lower frame, corresponding to the portion III-III of Fig. 2.
  • Fig. 4 is a partial enlarged plan view showing a stopper for locking the locking pin of Fig. 2.
  • Fig. 5 is a partial enlarged vertical sectional view of a gate for infant of an embodiment showing an upper axis part of a rotating axis part.
  • Fig. 6 is a front view of a fixed side member constituting the upper axis part of Fig. 5.
  • Fig. 7 is a side view of the fixed side member of Fig. 6.
  • Fig. 8 is a front view of a movable side member constituting the upper axis part of Fig. 5.
  • Fig. 9 is a side view of the movable side member of Fig. 8.
  • Fig. 10 is a partial sectional view of the portion X-X of Fig. 9.
  • Fig. 11 is a partial enlarged sectional view showing the movable side member rotated relative to the fixed side member at the upper axis part of Fig. 5.
  • Fig. 12 is a partial enlarged vertical sectional view of a lower axis part at a rotating axis part of a gate for infant of an embodiment.
  • Fig. 13 is a partial enlarged vertical sectional view showing a part of a locking arrangement of a gate for infant of an embodiment.
  • Fig. 14 is a partial enlarged vertical sectional view showing the state where both the first projecting piece and the second projecting piece of the locking arrangement of Fig. 13 are unlocked.
  • the gate for infant hereafter referred to as “gate” ) G is, as shown in Fig. 1, installed at an entrance of a room or at the bottom of the stairs etc. in buildings.
  • the gate G is installed at an entrance D of a room.
  • the gate G is installed on the floor surface F to close the opening O between the attaching surfaces WL and WR which are opposed to each other.
  • the lateral direction is set such that the locking arrangement 58 is located at the left side of the door member 18 and the direction along the vertical direction of the door member 18 is explained as the vertical direction unless otherwise specified.
  • the gate G comprises an approximately U-shaped frame 1 attached to the attaching surfaces WL and WR, a door member 18 rotatably connected to the frame 1 and a locking arrangement 58 capable of regulating the opening of the door member from the frame 1.
  • the frame 1 as shown in Fig. 1, comprises an approximately U-shaped frame body 2, extension members 12 removably arranged outside the both ends of the frame body 2 to fit to the dimension of the opening of the entrance D and adjusters 13 for placing the frame 1 in close contact with the left and right attaching surfaces WL and WR.
  • the frame body 2 comprises two left and right side frames 8L and 8R facing the attaching surfaces WL and WR as well as a lower frame 3 facing the floor surface F to connect the lower ends of the side frames 8L and 8R to each other.
  • FIG. 3 includes a central portion 3a positioned at a center in the lateral direction under the door member 18 and in contact with the floor surface F as well as left and right end portions 3b and 3b which constitute the side frames 8L and 8R at the left and right ends and are bent so as to be spaced upward from the floor surface F and positioned above the central portion 3a for providing a gap between the floor surface F as shown in Fig. 1.
  • an axis body 4 which constitutes a lower axis part 52 of a rotating axis part 28 for rotatably connecting a right end 18b of the door member 18 to the right side frame 8R is projected in a right side inclined portion 3c which is arranged inclined to connect the central portion 3a and the right end portion 3b (see Figs. 1 and 12) .
  • a stopper 5 capable of locking a locking pin 24 located at the lower end 19b of the tip end side part 19 of the door member 18 is arranged at the left end of the central portion 3a of the lower frame 3.
  • the stopper 5 has a locking hole 6 capable of locking the locking pin 24 at its peripheral edge.
  • the locking hole 6 has, as shown in Fig. 2 and 4, a hole body 6a in which a tip 24a of the locking pin 24 projecting downward when the door member 18 is closed can be inserted and guide planes 6b at the both sides of the hole body 6a inclined down to the hole body 6a along the lateral direction.
  • the locking hole 6 is formed on the upper side of the stopper 5 in an approximately center in the front and rear direction, with its upper side being open to be capable of being inserted the locking pin 24 from above.
  • the guide plane 6b formed on the locking hole 6 is constituted such that the locking pin 24 projecting from the lower end 19b can be removed from the hole body 6a when the tip end side part 19 of the door member 18 moves upward to tilt the door member 18 so as to orient the lower end 19b of the tip end side part 19 to the left.
  • the stopper 5 has, at its upper surface, planes 5a inclined in the front and rear directions at both the front and rear sides of the locking hole 6 upward towards the position of the locking hole 6 (see Fig. 3) .
  • the inclined plane 5a is constituted to be capable of pushing up the locking pin 24 to guide it toward to the locking hole 6 when the open door member 18 moves to the closing direction to abut the tip 24a of the locking pin 24 on the inclined plane 5a and urges the locking pin 24 to project downward.
  • attaching holes not shown are formed for inserting an attaching member 12d formed on an extension member 12 and a bolt member 14 of the adjuster 13.
  • each of the left and right side frames 8L and 8R comprises two support members 9 extending upward from the end portions 3b of the lower frame 3 and an upper connecting rod part 10 connecting the upper ends of the support members 9.
  • a support member 9A located at the side of the door member 18, is formed of a pipe material having an approximately oval cross-section
  • a support member 9B located at a laterally outer position remote from the door member 18, is formed from a pipe material having an approximately round cross-section.
  • the upper connecting rod part 10 constituted of a square cylindrical pipe material, is arranged to be continuous from the upper end 18c of the door member 18 so as to make the vertical position approximately coincide with that of the upper end 18c (upper horizontal bar part 21U) of the door member 18. Also at the laterally outer ends of the upper connecting rod part 10, not-shown attaching holes are formed for inserting the attaching member 12d formed on the extension member 12 and the bolt member 14 of the adjuster 13.
  • the extension member 12 having a vertical width dimension approximately equal to that of the side frames 8L and 8R as shown in Fig. 1, comprises a support member 12a located approximately along the vertical direction, an upper bar part 12b projecting laterally inward from the upper end of the support member 12a and a lower bar part 12c projecting laterally inward from the lower end of the support member 12a.
  • the upper bar part 12b and the lower bar part 12c is arranged to be continuous to the lower frame 3 and the upper connecting rod 10 when being attached to the frame body 2.
  • attaching members 12d capable of being inserted into not-shown attaching holes formed on the lower frame 3 and the upper connecting rod 10.
  • not-shown attaching holes in which the attaching member 12d of the other extension member 12 or the bolt member 14 of the adjuster 13 can be inserted, are formed.
  • the number of the extension members 12 is increased or decreased according to the width dimension of the entrance etc. where the gate is installed. In the embodiment, only one extension member 12 is used at the right side of the frame body 2.
  • the adjuster 13 comprises a bolt member 14 and a nut member 15 having a pressing plate (operation part) 14a and 15a respectively.
  • the distance between the pressing plates 14a and 15a can be changed by fastening the bolt member 14 to the nut member 15.
  • the adjuster 13 is interposed between the frame body 2 or the extension member 12 and the attaching surface WL, WR to press the pressing plate 14a, 15a onto the attaching surface WL, WR and the frame body 2 or the extension member 12 while inserting the bolt part of the bolt member 14 into a not-shown attaching hole of the frame body 2 or the extension member 12 to thereby bring the frame 1 into close contact with the left and right attaching surfaces WL, WR to attach the frame 1 to the left and right attaching surfaces WL, WR.
  • the door member 18 comprises an upper horizontal bar part 21U and a lower horizontal bar part 21D laterally arranged at the upper and lower ends as well as vertical bar parts 22 vertically arranged to connect the upper horizontal bar part 21U and the lower horizontal bar part 21D, with its left side 18a being the distal end when the door member opens, whereas its right side 18b being rotatably connected to the right side frame 8R of the frame body 8 by the rotating axis part 28.
  • the upper horizontal bar part 21U and the lower horizontal bar part 21D similarly to the upper connecting rod part 10, are constituted of a square cylindrical pipe material.
  • the vertical bar parts 22 are formed of pipe materials with round cross-sections.
  • a vertical bar part 22A arranged at the tip end side (the side of the left end 18a) of the door member 18 to constitute the tip end side part 19, is formed of a pipe material having an approximately square cross-section and is constituted to make the lower end 22a project below the lower horizontal bar part 21D.
  • a locking pin 24 for locking the lower end 19b of the tip end side part 19 of the door member 18 to the stopper 5 provided on the lower frame 3 is arranged to project downward (see Figs. 2 and 3) .
  • the locking pin 24 is attached so as to be vertically slidable relative to a guide 25 located at the lower end 22a of the vertical bar part 22A such that it is urged due to its own weight to be kept projected from the door member 18 (vertical bar part 22A) .
  • the locking pin 24 can move upward to be pushed into the guide 25 when it is pressed from below.
  • a stopper 25a for preventing excessive upward movement of the locking pin 24 is provided at the upper end of the guide 25, a stopper 25a for preventing excessive upward movement of the locking pin 24 is provided.
  • the locking pin 24, when released from the pressure from below, moves downward due to its own weight to project from the guide 25 (door member 18) .
  • the rotating axis part 28 for rotatably connecting the right end 18b of the door member 18 to the right side frame 8R comprises an upper axis part 29 located at the upper end 18c of the door member 18 and a lower axis part 52 located at the lower end 18d of the door member 18.
  • the upper axis part 29 comprises a movable side member 37 formed to project rightward from the upper right end of the door member 18, a fixed side member 30 located at the upper left side of the side frame 8R, a cap member 45 to be inserted in an inner cylindrical part 34 formed at the fixed side member 30 and a coil spring 49 as an urging means interposed between the cap member 45 and an outer cylindrical part 38 formed on the movable side member 37.
  • the fixed side member 30 comprises an attaching part 31, a base part 32 extending upward from the left side of the attaching part 31 and an inner cylindrical part 34 which is formed to project upward from the base part 32 and is constituted to be capable of being inserted inside an outer cylindrical part 38 formed at the movable side member 37.
  • the inner cylindrical part 34 is constituted to have an approximately cylindrical shape with its upper end being open to allow insertion of an axis part 47 extending from the cap member 45 for bayonet connection.
  • the base part 32 protrudes over the outer periphery of the inner cylindrical part 34 to form a step-like shape with the inner cylindrical part 34, having an approximately cylindrical outer shape with its center approximately coinciding with that of the inner cylindrical part 34 and having on its upper surface an inclined plane part 33 capable of guiding the outer cylindrical part 38 of the rotating movable side member 37.
  • the inclined plane part 33 is formed at the left-half region of the base part 32 (the side of the door member 18) and is laterally inclined to locate the center in the front and rear direction of the left end at a lower position.
  • the inclined part 33 is formed to guide a projected part 42 extending downward from a bottom wall 40 of the outer cylindrical part 38 of the rotating movable side member 37 when the door member 18 opens.
  • a recessed part 33a is formed by recessing the upper surface (see Figs. 6 and 7) .
  • the recessed part 33a is constituted to be capable of receiving and locking the tip end of the projected part 42 extending downward from the bottom wall part 40 of the outer cylindrical part 38 of the movable side member 37 when the door member 18 is closed.
  • the depth of the recessed part 33a is set such that the projected part 42 can pass over the recessed part 33a when the door member 18 opens to move the tip end side part 19 of the left end 18a upward.
  • the inclined part 33 guides the projected part 42 that passed over the recessed part 33a to be pushed upward as the movable side member 37 rotates.
  • a recessed part 32a for receiving the tip end of the projected part 42 is formed by recessing the upper surface as shown in Fig. 6.
  • the base part 32 is constituted to have a gap H between the attaching part 31 and the base part 32 capable of being inserted an extension part 41 of the outer cylindrical part 38 of the movable side member 37 (see Fig. 6) .
  • the size of the gap H is set so as to allow the inclination of the movable side member 37 caused by the inclination of the door member 18 which raises the tip end side part 19 when the door member 18 opens.
  • a guide plane 31a capable of guiding the outer cylindrical part 38 of the rotating movable side member 37 is formed in correspondence with the inclined plane part 33 which is formed on the base part 32.
  • the guide plane 31a declines from the center toward both the front and rear sides in correspondence with the inclination of the inclined plane part 33 so as to incline in left and right directions in both the front and rear sides of the lower end of the base part 32.
  • the guide plane 31a is formed for guiding the extension part 41 at the outer cylindrical part 38 of the rotating movable side member 37 when the door 18 opens.
  • the movable side member 37 is attached to the right end of the upper horizontal bar part 21U of the door member 18 and comprises the outer cylindrical part 38 formed at the right end 18b of the door member 18 to cover the outer periphery of the inner cylindrical part 34 of the fixed side member 30.
  • the outer cylindrical part 38 constituted to have an approximately cylindrical shape with an open upper end, comprises a cylindrical side wall part 39 and a bottom wall part 40 closing the lower end of the side wall part 39.
  • An insertion hole 41a for inserting the inner cylindrical part 34 is provided at the bottom wall part 40.
  • the inner diameter dimension of the side wall part 39 is set such that the coil spring 49 can be placed between the side wall part 39 and the inner cylindrical part 34.
  • the outer cylindrical part 38 has the cylindrical extension part 41 extending downward the bottom wall part 40 from the side wall part 39.
  • the extension part 41 is constituted to have an open lower end and is formed to be capable of being inserted the base part 32 of the fixed side member 30.
  • an inclined part 41a inclined in the lateral direction to locate the right end at a higher position in correspondence to the inclination of the guide plane 31a formed at the attaching part 31 of the fixed side member 30 is provided.
  • a projected part 42 projected downward from the lower surface of the bottom wall part 40 is formed (see Figs. 8-10 .
  • the projected part 42 is received in the recessed part 33a formed on the inclined plane part 33 of the base part 32 of the fixed side member 30 when the door member 18 is closed.
  • the projected part 42 rotates together with the door member 18 guided by the inclined plane part 33 formed at the base part 32 of the fixed side member 30 while keeping the tip end plane 42a abut on the inclined plane part 33.
  • the tip end plane 42a is shaped approximately circular in cross section so as to be capable of moving on the inclined plane part 33 smoothly (see Fig. 10) .
  • the cap member 45 comprises a head part 46 having an approximately disc-like shape and capable of closing the opening at the upper end of the outer cylindrical part 38 of the movable side member 37 and an axis part 47 capable of being bayonet-connected to the inner cylindrical part 34 of the fixed side member 30.
  • the cap member 45 is connected to the fixed side member 30 and rotatably connects the movable side member 37 to the fixed side member 30 by bayonet-connecting the axis part 47 inserted in the inner cylindrical part 34 of the fixed side member 30 to the inner cylindrical part 34 through the coil spring 49 interposed between the head part 46 and the bottom wall part 40 of the movable side member 37.
  • the coil spring 49 is compressed to be inserted in the gap between the outer cylindrical part 38 of the movable side member 37 and the inner cylindrical part 34 of the fixed side member 30 to be interposed between the head part 46 of the cap member 45 and the bottom wall part 40 of the movable side member 37.
  • the movable side member 37 rotates while moving upward, guided by the guide plane 33a and the inclined plane part 33 formed on the fixed side member 30 when the door member 18 opens.
  • the cap member 45 does not move due to the connection to the fixed side member 30, and only the movable side member 37 rotates and moves upward, as shown in Fig. 11. Since the bottom wall part 40 abutting the lower end of the coil spring 49 moves together with the movable side member 37, the coil spring 49 located between the head part 46 of the cap member 45 and the bottom wall part 40 is further compressed as the bottom wall part 40 moves.
  • the coil spring 49 is restored to push the bottom wall part 40 downwards.
  • the movable side member 37 rotates in a reverse direction while moving downward to rotate the door member in a closing direction.
  • the restoring force of the coil spring 49 automatically closes the door member 18 until the tip end side part 19 is positioned close to the side frame 8L.
  • the lower axis part 52 comprises a round rod-like axis body 4 projecting from the lower frame 3 and a bearing part 53 located at the side of the right end 18b of the door member 18.
  • the axis body 4 is positioned at the right side inclined part 3c of the lower frame 3 to extend upward.
  • the bearing part 53 comprises an insertion hole 54 having an open lower side so as to be capable of being inserted the axis body 4.
  • the insertion hole 54 has an oval cross section with its longitudinal direction being approximately along the lateral direction so that when the door member 18 is opened and inclined to raise the tip end side part 19 (the side of the left side 18a) of the door member 18, the inserted axis body 4 allows the inclination of the door member 18 to move inside the insertion hole 54.
  • the axis body 4 is positioned close to the left side surface 54a of the insertion hole 54.
  • the locking arrangement 58 capable of regulating the opening of the door member 18 from the frame 1 (frame body 2) , is located at the upper end on the side of the left side 18a (the side of the upper end 19a of the tip end side part 19) , which is the distal end of the opening.
  • the locking arrangement 58 comprises a locking member 62 held by a holding member 59 at the upper left end of the door member 18 (the side of the upper end 19a of the tip end side part 19) and a locked member 70 which is located at the upper right end of the left side frame 8L to be locked by the locking member 62.
  • the holding member 59 made of synthetic resin is attached to the upper end 19a of the tip end side part 19 of the door member 18 while holding the locking member 62. It covers the outer periphery region of the locking member 62 excepting the tip end portions 63a and 64a of the first projected piece 63 and second projected piece 64 described below as well as the upper surface of the operation part 65 to constitute the portion which is held by a user when opening the door member 18 .
  • a locking part 60 for locking a locking piece 68 extending from the proximal ends of the spring pieces 66 and 67 as the urging means extending from the first projecting piece 63 and the second projecting piece 64 is provided inside the holding member 59.
  • the locking member 62 is constituted as an integrally formed material made of synthetic resin, and comprises, as shown in Fig. 13, the first projected piece 63 and the second projected piece 64 projecting from the left end surface 59a of the holding member 59 located at the tip end side part 19 of the door member 18 to the side of the side frame 8L (leftward) , an operation part 65 which can draw the first projected piece 63 inside, spring pieces 66 and 67 for urging the first projected piece 63 and the second projected piece 64 to the direction of the projection (leftward) respectively, and a locking piece 68 for locking the proximal end of each of the spring pieces 66 and 67 to the locking part 60 formed on the holding member 59.
  • the first projected piece 63 has an elongated shape with its longitudinal direction being approximately along the lateral direction and is located so as to make its tip end portion 63a project leftward from the left end surface 59a of the holding member 59.
  • the second projected piece 64 has an elongated shape with its longitudinal direction being inclined in the lateral direction so as to direct its tip end facing the side frame 8L downward immediately below the first projected piece 63 and is located so as to make its tip end portion 64a project leftward from the left end surface 59a of the holding member 59.
  • the amount of the projection of the tip end portions 63a and 64a of the first and second projected pieces 63 and 64 in the lateral direction are set to be approximately identical to each other.
  • the thin plate-like spring piece 66 which urges the first projected piece 63 to project from the holding member 59 is formed integrally with the first projected piece 63 to extend from the proximal portion of the first projected piece 63 while being curved so as to project leftward, its proximal end distant from the first projected piece 63 being locked to the locking part 60 of the holding member 59 by a locking piece 68.
  • the thin plate-like spring piece 67 which urges the second projected piece 64 to project from the holding member 59 is formed integrally with the second projected piece 64 to extend from the proximal portion of the second projected piece 64 below the spring piece 66 extending from the first projected piece 63, while being curved so as to project leftward, its proximal end distant from the second projected piece 64 being connected to the locking piece 68 together with the proximal end of the spring piece 66 to be locked to the locking part 60 of the holding member 59 by the locking piece 68.
  • each of the spring pieces 66 and 67 is constituted to separate from the locking piece 68 in two branches.
  • the approximately sheet-like locking piece 68 extending upward is locked to the locking part 60 formed on the holding member 59.
  • the operation part 65 is connected to the first projected piece 63 and projects upward from the first projected piece 63 to expose its upper surface from the holding member 59.
  • the first projected piece 63 connected to the operation part 65 is drawn in the holding member 59 while bending the spring piece 66 (see Fig. 14) .
  • the spring piece 66 is restored to return the operation part 65 to the state before sliding, and the first projected piece 63 again makes the tip end portion 63a project from the left end surface 59a of the holding member 59.
  • the locked member 70 located at the side of the side frame 8L comprises, on its right end surface 70a which is opposed to the left end surface 59a of the holding member 59, a first locking hole 71 and a second locking hole 72 capable of locking the first projected piece 63 and the second projected piece 64 at the respective peripheral edge.
  • the first locking hole 71 formed on the right end surface 70a of the locked member 70 as a recess having an approximately rectangular cross-section so as to be capable of being inserted the tip end portion 63a of the first projected piece 63 projecting from the holding member 59, regulates the movement of the tip end portion 63a of the first projected piece 63 with its peripheral upper, lower, front and rear side surfaces.
  • the second locking hole 72 located immediately below the first locking hole 71, is formed on the right end surface 70a as a recess having an approximately trapezoidal cross-section with an inclined upper surface 72a.
  • the upper surface 72a of the second locking hole 72 is laterally inclined so as to locate the bottom of the recess at a lower position and to locate the opening of the recess at an upper position.
  • the upper surface 72a of the second locking hole 72 has the inclination angle to the lateral (horizontal) direction larger than that of the second projected piece 64 to the lateral (horizontal) direction, thus being capable of guiding the upwardly moving tip end portion 64a of the second projected piece 4 when lifting the tip end side part 19 of the door member 18 while sliding the operation part 65.
  • the upwardly moving tip end portion 64a of the second projected piece 64 is guided by the upper surface 72a of the second locking hole 72 to be pushed into the holding member 59 by the upper surface 72a, thus releasing the locking state of the second projected piece 64 to the periphery of the second locking hole 72 of the second projected piece 64 (see Fig. 14) .
  • the door member 18 can be opened. Thereafter, even when the open door member 18 is unhanded, the door member 18 automatically returns to the state where the tip end side part 19 is positioned close to the side frame 8L due to the restoration of the coil spring 49 located inside the upper axis part 29.
  • the second projected piece 64 can be inserted into the second locking hole 72 to be locked to the periphery of the second locking hole 72.
  • the operation part 65 returns to the state before sliding due to the restoration of the spring piece 66 and the first projected piece 63 again makes the tip end portion 63a project from the left end surface 59a of the holding member 59 to be inserted into the first locking hole 71, thereby locking the first projected piece 63 to the periphery of the first locking hole 71 to lock the opening of the door member 18 from the frame 1 (side frame 8L) by the locking arrangement 58.
  • the locking apparatus 58 for locking the door member 18 to the frame 1 comprises the first projected piece 63 and the second projected piece 64, among which the first projected piece 63 is constituted to be capable of releasing the locking state to the first locking hole 71 by sliding the operating part 65 located at the door member 18, and the second projected piece 64 is constituted to be capable of releasing the locking state to the second locking hole 72 only when the tip end side part 19 of the door member 18 is lifted while operating the operating part 65.
  • the locking arrangement 58 can be unlocked to open the door member 18 without lifting the entire door member 18. The door member 18 thus can be opened with light operation force, without need to lift the entire heavy door member 18.
  • the door member 18 can securely be prevented from being opened due to operation by an infant.
  • the second locking hole 72 has an upper surface 72a inclined upward toward an opening so as to guide said second projected piece 64 moving upward as said door member 18 moves upward. Therefore, in the gate G of the embodiment, the tip end portion 64a the second projected piece 64 is guided by the upper surface 72a of the second locking hole 72 to be released from the locking state to the second locking hole 72 when the tip end side part of the door member is lifted. Since the locking state of the second projected piece 64 to the second locking hole 72 is thus released simply by lifting the tip end side part 19 of the door member 18, the door member 18 can be opened by an easy operation. Without taking such point in consideration, another operation part capable of drawing the second projected piece, for instance, can be provided.
  • a locking pin 24 which locks the lower end 19b of the closed door member 18 to the lower frame 3 and can be released from the locking state when the tip end side part 19 moves upward is positioned at the lower end 19b of the tip end side part 19 of the door member 18 while being urged to be capable of maintaining the projected state from the door member 18. Therefore, the lower end 19b of the closed door member 18 can stably be locked to the frame 1 (lower frame 3) by the locking pin 24. Furthermore, since the locking pin 24 is urged to be capable of maintaining the projecting state from the door member 18, the lower end 19b of the door member 18 can be locked to the lower frame 3 by the urging force when the once-opened door member 18 again becomes a closed state, thus providing superior operability.
  • the locking pin may not be positioned at the lower end of the tip end side of the door member.
  • the locking pin 24 in the embodiment is urged to be capable of maintaining the projected state from the door member 18 due to its own weight, a spring for example can be used as the urging means.

Abstract

A gate for infant (G) is provided, which comprises an approximately U-shaped frame (1) attached to attaching surfaces (WL, WR), a door member (18) connected to the frame (1), a locking arrangement (58) capable of regulating the opening of the door member (18) from the frame (1) and adjusters (13) for pressing both sides of the frame (1) at least at its lower end into the attaching surfaces (WL, WR). The frame (1) comprises two side frames (8L, 8R) and a lower frame (3). The locking arrangement (58) comprises a first projected piece (63) and a second projected piece (64). A first locking hole (71) and a second locking hole (72) are formed on the side frame to receive the first and second projected piece (63, 64). The gate for infant (G) can prevent the door member (18) from being opened due to an operation by an infant mistakenly.

Description

Gate for Infant [Technical Field]
This device relates to a gate for infant installed at an entrance of a room or at the stairs etc. in buildings such as houses or facilities for blocking passage of infants, pets and so on.
[Background Art]
Conventionally, there have been gates for infants comprising a frame to be attached to attaching surfaced opposed to each other, a door member rotatably connected to the frame and a locking arrangement capable of regulating the opening of the door member from the frame, the locking arrangement being capable of releasing the locking state through two-step operation. (For example, see Patent Document 1. ) In this conventional gate for infants, the locking arrangement comprises two lock pins positioned at both the upper and lower ends of the door member, a handle for retreating the lock pins simultaneously to release the locking state and a stopper for regulating the operation of the handle and is capable of releasing the locking state of the lock pins by operating the handle while retracting the stopper.
[Prior Art Document]
[Patent Documents]
[Patent Document 1] Patent Publication No. 2002-283927
[Summary of the Device]
[Problems to be solved by the Device]
However, in such conventional gates for infant, since the sliding member for retracting the stopper is located near the handle and the locking state of both the upper and lower lock pins simultaneously by lifting the handle while sliding the sliding member to retract the stopper, an infant may mistakenly open the door member by lifting the handle while sliding the sliding member. Therefore, there has been room for improvement in securely preventing the door member from being opened due to operation by an infant.
For solving the aforementioned problem, the present device has been made to provide a gate for infant with high safety which can securely prevent the door member from being opened due to operation by an infant.
[Means of Solving the Problem]
The gate for infant of the present device is constituted to be mounted on a floor surface in a building to close an opening between two attaching surfaces which are opposed to each other, comprising an approximately U-shaped frame attached to the attaching surfaces, a door member rotatably connected to the frame and a locking arrangement capable of regulating the opening of the door member from the frame, said frame comprising two side frames located at the sides of the attaching surfaces and a lower frame located at the side of the floor surface to connect the lower ends of the side frames to each other, said door member having an end rotatably connected to one of said side frames by a rotating axis part, and said locking apparatus is constituted to be capable of locking the tip end side part of the door member, which is the distal end of the rotating of the door member, to another of said side frames, wherein said locking apparatus comprises a first projected piece and a second projected piece projecting from the tip end side part of the door member to the side of side frame of the frame, a first locking hole and a second locking hole formed on the side frame to be capable of locking the first projected piece and the second projected piece at its periphery and an operation part located at the side of the door member to be capable of releasing the locking state of the first projected piece to the first locking hole, and said second locking hole for locking the second projected piece has an upper surface inclined upward toward an opening so as to guide said second projected piece moving upward as said door member moves upward, and can be released from the locking state to the second projected piece only when the side of the tip end side part of the door member is lifted while operating the operation part.
In the gate for infant of the present device, the locking apparatus for locking the door member to the frame comprises two projected pieces, among which the first projected piece is constituted to be capable of releasing the locking state to the first locking hole by operating the operating part located at the door member, and the second projected piece is constituted to be capable of releasing the locking state to the second locking hole only when the tip end side part of the door member is lifted while operating the operating part. In other words, in the gate for infant of the present device, unless lifting the tip end side part of the door member to move the door member upward in the direction orthogonal to the rotating direction of the door member for opening while operating the operating part, the locking of both of the first projected piece and the second projected piece cannot be released simultaneously, and thus cannot open the door member. Since such lifting operation of the door member is difficult for an infant who tends to focus only on the rotating operation, the door member can securely be prevented from being opened due to  mistaken operation by an infant.
Therefore, in the gate for infant of the present device, the door member can securely be prevented from being opened due to operation by an infant.
In addition, in the gate for infant of the present device, the second locking hole has an upper surface inclined upward toward an opening so as to guide said second projected piece moving upward as said door member moves upward. Therefore, the second projected piece is guided by the upper surface of the second locking hole to be released from the locking state to the second locking hole when the tip end side part of the door member is lifted. Since the locking state of the second projected piece to the second locking hole is thus released simply by lifting the tip end side part of the door member, the door member can be opened by an easy operation.
Furthermore, in the gate for infant having the aforementioned constitution, a locking pin which locks the lower end of the closed door member to the lower frame and can be released from the locking state when the tip end side part moves upward may preferably be positioned at the lower end of the tip end side part of the door member while being urged to be capable of maintaining the projected state from the door member.
In the gate for infant having the aforementioned constitution, the lower end of the closed door member can stably be locked to the frame by the locking pin. Furthermore, since the locking pin is urged to be capable of maintaining the projected state from the door member, the lower end of the door member can be locked to the lower frame by the urging force when the once-opened door member again becomes a closed state, thus providing superior operability.
[Brief Explanation of the Drawings]
Fig. 1 is a front view of the gate for infant of the present device installed at an entrance of a room.
Fig. 2 is a partial enlarged vertical sectional view of the gate for infant of an embodiment showing a locking pin for locking the tip end of the door member to the lower frame.
Fig. 3 is a partial enlarged vertical sectional view of a gate for infant of an embodiment showing a locking pin for locking the tip end of the door member to the lower frame, corresponding to the portion III-III of Fig. 2.
Fig. 4 is a partial enlarged plan view showing a stopper for locking the locking pin of Fig. 2.
Fig. 5 is a partial enlarged vertical sectional view of a gate for infant of an  embodiment showing an upper axis part of a rotating axis part.
Fig. 6 is a front view of a fixed side member constituting the upper axis part of Fig. 5.
Fig. 7 is a side view of the fixed side member of Fig. 6.
Fig. 8 is a front view of a movable side member constituting the upper axis part of Fig. 5.
Fig. 9 is a side view of the movable side member of Fig. 8.
Fig. 10 is a partial sectional view of the portion X-X of Fig. 9.
Fig. 11 is a partial enlarged sectional view showing the movable side member rotated relative to the fixed side member at the upper axis part of Fig. 5.
Fig. 12 is a partial enlarged vertical sectional view of a lower axis part at a rotating axis part of a gate for infant of an embodiment.
Fig. 13 is a partial enlarged vertical sectional view showing a part of a locking arrangement of a gate for infant of an embodiment.
Fig. 14 is a partial enlarged vertical sectional view showing the state where both the first projecting piece and the second projecting piece of the locking arrangement of Fig. 13 are unlocked.
[Mode for Carrying Out the Device]
One embodiment of the present device is explained hereinafter with reference to the drawings. The gate for infant (hereafter referred to as “gate” ) G is, as shown in Fig. 1, installed at an entrance of a room or at the bottom of the stairs etc. in buildings. In the embodiment, the gate G is installed at an entrance D of a room. The gate G is installed on the floor surface F to close the opening O between the attaching surfaces WL and WR which are opposed to each other. In the embodiment, the lateral direction is set such that the locking arrangement 58 is located at the left side of the door member 18 and the direction along the vertical direction of the door member 18 is explained as the vertical direction unless otherwise specified.
As shown in Fig. 1, the gate G comprises an approximately U-shaped frame 1 attached to the attaching surfaces WL and WR, a door member 18 rotatably connected to the frame 1 and a locking arrangement 58 capable of regulating the opening of the door member from the frame 1.
The frame 1, as shown in Fig. 1, comprises an approximately U-shaped frame body 2, extension members 12 removably arranged outside the both ends of the frame body 2 to fit to the dimension of the opening of the entrance D and adjusters 13 for placing  the frame 1 in close contact with the left and right attaching surfaces WL and WR.
The frame body 2 comprises two left and  right side frames  8L and 8R facing the attaching surfaces WL and WR as well as a lower frame 3 facing the floor surface F to connect the lower ends of the  side frames  8L and 8R to each other. The lower frame 3, formed of a pipe material having an approximately oval cross-section whose longitudinal direction being approximately along the floor surface F (horizontal surface) as shown in Fig. 3, includes a central portion 3a positioned at a center in the lateral direction under the door member 18 and in contact with the floor surface F as well as left and  right end portions  3b and 3b which constitute the  side frames  8L and 8R at the left and right ends and are bent so as to be spaced upward from the floor surface F and positioned above the central portion 3a for providing a gap between the floor surface F as shown in Fig. 1. In addition, at the lower frame 3 of the embodiment, an axis body 4 which constitutes a lower axis part 52 of a rotating axis part 28 for rotatably connecting a right end 18b of the door member 18 to the right side frame 8R is projected in a right side inclined portion 3c which is arranged inclined to connect the central portion 3a and the right end portion 3b (see Figs. 1 and 12) .
Also as shown in Figs. 1-4, a stopper 5 capable of locking a locking pin 24 located at the lower end 19b of the tip end side part 19 of the door member 18 is arranged at the left end of the central portion 3a of the lower frame 3. The stopper 5 has a locking hole 6 capable of locking the locking pin 24 at its peripheral edge. In the embodiment, the locking hole 6 has, as shown in Fig. 2 and 4, a hole body 6a in which a tip 24a of the locking pin 24 projecting downward when the door member 18 is closed can be inserted and guide planes 6b at the both sides of the hole body 6a inclined down to the hole body 6a along the lateral direction. The locking hole 6 is formed on the upper side of the stopper 5 in an approximately center in the front and rear direction, with its upper side being open to be capable of being inserted the locking pin 24 from above. The guide plane 6b formed on the locking hole 6 is constituted such that the locking pin 24 projecting from the lower end 19b can be removed from the hole body 6a when the tip end side part 19 of the door member 18 moves upward to tilt the door member 18 so as to orient the lower end 19b of the tip end side part 19 to the left. The stopper 5 has, at its upper surface, planes 5a inclined in the front and rear directions at both the front and rear sides of the locking hole 6 upward towards the position of the locking hole 6 (see Fig. 3) . The inclined plane 5a is constituted to be capable of pushing up the locking pin 24 to guide it toward to the locking hole 6 when the open door member 18 moves to the closing direction to abut the  tip 24a of the locking pin 24 on the inclined plane 5a and urges the locking pin 24 to project downward. At both the left and right ends of the lower frame 3 (the outer ends of the left and right end portions 3b) , attaching holes not shown are formed for inserting an attaching member 12d formed on an extension member 12 and a bolt member 14 of the adjuster 13.
As shown in Fig. 1, each of the left and  right side frames  8L and 8R comprises two support members 9 extending upward from the end portions 3b of the lower frame 3 and an upper connecting rod part 10 connecting the upper ends of the support members 9. In each of the  side frames  8L and 8R, a support member 9A, located at the side of the door member 18, is formed of a pipe material having an approximately oval cross-section, and a support member 9B, located at a laterally outer position remote from the door member 18, is formed from a pipe material having an approximately round cross-section. The upper connecting rod part 10, constituted of a square cylindrical pipe material, is arranged to be continuous from the upper end 18c of the door member 18 so as to make the vertical position approximately coincide with that of the upper end 18c (upper horizontal bar part 21U) of the door member 18. Also at the laterally outer ends of the upper connecting rod part 10, not-shown attaching holes are formed for inserting the attaching member 12d formed on the extension member 12 and the bolt member 14 of the adjuster 13.
The extension member 12, having a vertical width dimension approximately equal to that of the  side frames  8L and 8R as shown in Fig. 1, comprises a support member 12a located approximately along the vertical direction, an upper bar part 12b projecting laterally inward from the upper end of the support member 12a and a lower bar part 12c projecting laterally inward from the lower end of the support member 12a. The upper bar part 12b and the lower bar part 12c is arranged to be continuous to the lower frame 3 and the upper connecting rod 10 when being attached to the frame body 2. At the tip sides (lateral inner ends) of the upper bar part 12b and the lower bar part 12c, attaching members 12d capable of being inserted into not-shown attaching holes formed on the lower frame 3 and the upper connecting rod 10. At the proximal ends (lateral outer ends) of the upper bar part 12b and the lower bar part 12c, not-shown attaching holes, in which the attaching member 12d of the other extension member 12 or the bolt member 14 of the adjuster 13 can be inserted, are formed. The number of the extension members 12 is increased or decreased according to the width dimension of the entrance etc. where the gate is installed. In the embodiment, only one extension member 12 is used at the right side of the frame body 2.
As shown in Figs. 1, the adjuster 13 comprises a bolt member 14 and a nut member 15 having a pressing plate (operation part) 14a and 15a respectively. The distance between the  pressing plates  14a and 15a can be changed by fastening the bolt member 14 to the nut member 15. At each of the four corners of the gate G, the adjuster 13 is interposed between the frame body 2 or the extension member 12 and the attaching surface WL, WR to press the  pressing plate  14a, 15a onto the attaching surface WL, WR and the frame body 2 or the extension member 12 while inserting the bolt part of the bolt member 14 into a not-shown attaching hole of the frame body 2 or the extension member 12 to thereby bring the frame 1 into close contact with the left and right attaching surfaces WL, WR to attach the frame 1 to the left and right attaching surfaces WL, WR.
As shown in Fig. 1, the door member 18 comprises an upper horizontal bar part 21U and a lower horizontal bar part 21D laterally arranged at the upper and lower ends as well as vertical bar parts 22 vertically arranged to connect the upper horizontal bar part 21U and the lower horizontal bar part 21D, with its left side 18a being the distal end when the door member opens, whereas its right side 18b being rotatably connected to the right side frame 8R of the frame body 8 by the rotating axis part 28. The upper horizontal bar part 21U and the lower horizontal bar part 21D, similarly to the upper connecting rod part 10, are constituted of a square cylindrical pipe material. The vertical bar parts 22 are formed of pipe materials with round cross-sections. A vertical bar part 22A, arranged at the tip end side (the side of the left end 18a) of the door member 18 to constitute the tip end side part 19, is formed of a pipe material having an approximately square cross-section and is constituted to make the lower end 22a project below the lower horizontal bar part 21D. At the lower end 22a of the vertical bar part 22A, a locking pin 24 for locking the lower end 19b of the tip end side part 19 of the door member 18 to the stopper 5 provided on the lower frame 3 is arranged to project downward (see Figs. 2 and 3) . In the embodiment, the locking pin 24 is attached so as to be vertically slidable relative to a guide 25 located at the lower end 22a of the vertical bar part 22A such that it is urged due to its own weight to be kept projected from the door member 18 (vertical bar part 22A) . The locking pin 24 can move upward to be pushed into the guide 25 when it is pressed from below. At the upper end of the guide 25, a stopper 25a for preventing excessive upward movement of the locking pin 24 is provided. The locking pin 24, when released from the pressure from below, moves downward due to its own weight to project from the guide 25 (door member 18) .
As shown in Figs. 1, 5 and 12, the rotating axis part 28 for rotatably connecting  the right end 18b of the door member 18 to the right side frame 8R, comprises an upper axis part 29 located at the upper end 18c of the door member 18 and a lower axis part 52 located at the lower end 18d of the door member 18.
As shown in Fig. 5, the upper axis part 29 comprises a movable side member 37 formed to project rightward from the upper right end of the door member 18, a fixed side member 30 located at the upper left side of the side frame 8R, a cap member 45 to be inserted in an inner cylindrical part 34 formed at the fixed side member 30 and a coil spring 49 as an urging means interposed between the cap member 45 and an outer cylindrical part 38 formed on the movable side member 37.
As shown in Figs. 5-7, the fixed side member 30 comprises an attaching part 31, a base part 32 extending upward from the left side of the attaching part 31 and an inner cylindrical part 34 which is formed to project upward from the base part 32 and is constituted to be capable of being inserted inside an outer cylindrical part 38 formed at the movable side member 37. The inner cylindrical part 34 is constituted to have an approximately cylindrical shape with its upper end being open to allow insertion of an axis part 47 extending from the cap member 45 for bayonet connection. The base part 32 protrudes over the outer periphery of the inner cylindrical part 34 to form a step-like shape with the inner cylindrical part 34, having an approximately cylindrical outer shape with its center approximately coinciding with that of the inner cylindrical part 34 and having on its upper surface an inclined plane part 33 capable of guiding the outer cylindrical part 38 of the rotating movable side member 37. The inclined plane part 33 is formed at the left-half region of the base part 32 (the side of the door member 18) and is laterally inclined to locate the center in the front and rear direction of the left end at a lower position. The inclined part 33 is formed to guide a projected part 42 extending downward from a bottom wall 40 of the outer cylindrical part 38 of the rotating movable side member 37 when the door member 18 opens.
In the vicinity of the center of the inclined plane part 33 (at the lowermost left end) , a recessed part 33a is formed by recessing the upper surface (see Figs. 6 and 7) . The recessed part 33a is constituted to be capable of receiving and locking the tip end of the projected part 42 extending downward from the bottom wall part 40 of the outer cylindrical part 38 of the movable side member 37 when the door member 18 is closed. The depth of the recessed part 33a is set such that the projected part 42 can pass over the recessed part 33a when the door member 18 opens to move the tip end side part 19 of the left end 18a upward. When the door member 18 opens, the inclined part 33 guides the  projected part 42 that passed over the recessed part 33a to be pushed upward as the movable side member 37 rotates. In the embodiment, also in the vicinity of the inclined plane part 33 on the upper surface of the base part 32, a recessed part 32a for receiving the tip end of the projected part 42 is formed by recessing the upper surface as shown in Fig. 6. The base part 32 is constituted to have a gap H between the attaching part 31 and the base part 32 capable of being inserted an extension part 41 of the outer cylindrical part 38 of the movable side member 37 (see Fig. 6) . The size of the gap H is set so as to allow the inclination of the movable side member 37 caused by the inclination of the door member 18 which raises the tip end side part 19 when the door member 18 opens. Moreover, at a region of the attaching part 31 which is right to the lower end of the base part 32 and near the border between the base part 32, a guide plane 31a capable of guiding the outer cylindrical part 38 of the rotating movable side member 37 is formed in correspondence with the inclined plane part 33 which is formed on the base part 32. At the lower right end of the base part 32, the guide plane 31a declines from the center toward both the front and rear sides in correspondence with the inclination of the inclined plane part 33 so as to incline in left and right directions in both the front and rear sides of the lower end of the base part 32. The guide plane 31a is formed for guiding the extension part 41 at the outer cylindrical part 38 of the rotating movable side member 37 when the door 18 opens.
As shown in Figs. 5 and 8-10, the movable side member 37 is attached to the right end of the upper horizontal bar part 21U of the door member 18 and comprises the outer cylindrical part 38 formed at the right end 18b of the door member 18 to cover the outer periphery of the inner cylindrical part 34 of the fixed side member 30. As shown in Figs. 5 and 10, the outer cylindrical part 38, constituted to have an approximately cylindrical shape with an open upper end, comprises a cylindrical side wall part 39 and a bottom wall part 40 closing the lower end of the side wall part 39. An insertion hole 41a for inserting the inner cylindrical part 34 is provided at the bottom wall part 40. The inner diameter dimension of the side wall part 39 is set such that the coil spring 49 can be placed between the side wall part 39 and the inner cylindrical part 34. The outer cylindrical part 38 has the cylindrical extension part 41 extending downward the bottom wall part 40 from the side wall part 39. The extension part 41 is constituted to have an open lower end and is formed to be capable of being inserted the base part 32 of the fixed side member 30. At the lower right end region of the extension part 41, an inclined part 41a inclined in the lateral direction to locate the right end at a higher position in correspondence to the inclination of the guide plane 31a formed at the attaching part 31 of the fixed side member  30 is provided. At the left end of the inner circumferential surface of the extension part 41, a projected part 42 projected downward from the lower surface of the bottom wall part 40 is formed (see Figs. 8-10) . As aforementioned, the projected part 42 is received in the recessed part 33a formed on the inclined plane part 33 of the base part 32 of the fixed side member 30 when the door member 18 is closed. When the door member 18 opens, the projected part 42 rotates together with the door member 18 guided by the inclined plane part 33 formed at the base part 32 of the fixed side member 30 while keeping the tip end plane 42a abut on the inclined plane part 33. The tip end plane 42a is shaped approximately circular in cross section so as to be capable of moving on the inclined plane part 33 smoothly (see Fig. 10) .
As shown in Fig. 5, the cap member 45 comprises a head part 46 having an approximately disc-like shape and capable of closing the opening at the upper end of the outer cylindrical part 38 of the movable side member 37 and an axis part 47 capable of being bayonet-connected to the inner cylindrical part 34 of the fixed side member 30. The cap member 45 is connected to the fixed side member 30 and rotatably connects the movable side member 37 to the fixed side member 30 by bayonet-connecting the axis part 47 inserted in the inner cylindrical part 34 of the fixed side member 30 to the inner cylindrical part 34 through the coil spring 49 interposed between the head part 46 and the bottom wall part 40 of the movable side member 37. The coil spring 49 is compressed to be inserted in the gap between the outer cylindrical part 38 of the movable side member 37 and the inner cylindrical part 34 of the fixed side member 30 to be interposed between the head part 46 of the cap member 45 and the bottom wall part 40 of the movable side member 37.
In the gate G of the embodiment, the movable side member 37 rotates while moving upward, guided by the guide plane 33a and the inclined plane part 33 formed on the fixed side member 30 when the door member 18 opens. At this time, the cap member 45 does not move due to the connection to the fixed side member 30, and only the movable side member 37 rotates and moves upward, as shown in Fig. 11. Since the bottom wall part 40 abutting the lower end of the coil spring 49 moves together with the movable side member 37, the coil spring 49 located between the head part 46 of the cap member 45 and the bottom wall part 40 is further compressed as the bottom wall part 40 moves. As a result, when the door member 18 is unhanded after the door member 18 opens, the coil spring 49 is restored to push the bottom wall part 40 downwards. By this pressing force, the movable side member 37 rotates in a reverse direction while moving downward to  rotate the door member in a closing direction. In other words, in the gate G of the embodiment, when the door member 18 is unhanded after the door member 18 opens, the restoring force of the coil spring 49 automatically closes the door member 18 until the tip end side part 19 is positioned close to the side frame 8L.
As shown in Fig. 12, the lower axis part 52 comprises a round rod-like axis body 4 projecting from the lower frame 3 and a bearing part 53 located at the side of the right end 18b of the door member 18. As aforementioned, the axis body 4 is positioned at the right side inclined part 3c of the lower frame 3 to extend upward. The bearing part 53 comprises an insertion hole 54 having an open lower side so as to be capable of being inserted the axis body 4. The insertion hole 54 has an oval cross section with its longitudinal direction being approximately along the lateral direction so that when the door member 18 is opened and inclined to raise the tip end side part 19 (the side of the left side 18a) of the door member 18, the inserted axis body 4 allows the inclination of the door member 18 to move inside the insertion hole 54. When the door member 18 is closed, the axis body 4 is positioned close to the left side surface 54a of the insertion hole 54.
As shown in Figs. 1 and 13, the locking arrangement 58, capable of regulating the opening of the door member 18 from the frame 1 (frame body 2) , is located at the upper end on the side of the left side 18a (the side of the upper end 19a of the tip end side part 19) , which is the distal end of the opening. As shown in Fig. 13, the locking arrangement 58 comprises a locking member 62 held by a holding member 59 at the upper left end of the door member 18 (the side of the upper end 19a of the tip end side part 19) and a locked member 70 which is located at the upper right end of the left side frame 8L to be locked by the locking member 62.
The holding member 59 made of synthetic resin is attached to the upper end 19a of the tip end side part 19 of the door member 18 while holding the locking member 62. It covers the outer periphery region of the locking member 62 excepting the  tip end portions  63a and 64a of the first projected piece 63 and second projected piece 64 described below as well as the upper surface of the operation part 65 to constitute the portion which is held by a user when opening the door member 18 . Inside the holding member 59, a locking part 60 for locking a locking piece 68 extending from the proximal ends of the  spring pieces  66 and 67 as the urging means extending from the first projecting piece 63 and the second projecting piece 64 is provided.
The locking member 62 is constituted as an integrally formed material made of synthetic resin, and comprises, as shown in Fig. 13, the first projected piece 63 and the  second projected piece 64 projecting from the left end surface 59a of the holding member 59 located at the tip end side part 19 of the door member 18 to the side of the side frame 8L (leftward) , an operation part 65 which can draw the first projected piece 63 inside,  spring pieces  66 and 67 for urging the first projected piece 63 and the second projected piece 64 to the direction of the projection (leftward) respectively, and a locking piece 68 for locking the proximal end of each of the  spring pieces  66 and 67 to the locking part 60 formed on the holding member 59. The first projected piece 63 has an elongated shape with its longitudinal direction being approximately along the lateral direction and is located so as to make its tip end portion 63a project leftward from the left end surface 59a of the holding member 59. The second projected piece 64 has an elongated shape with its longitudinal direction being inclined in the lateral direction so as to direct its tip end facing the side frame 8L downward immediately below the first projected piece 63 and is located so as to make its tip end portion 64a project leftward from the left end surface 59a of the holding member 59. The amount of the projection of the  tip end portions  63a and 64a of the first and second projected  pieces  63 and 64 in the lateral direction are set to be approximately identical to each other.
The thin plate-like spring piece 66 which urges the first projected piece 63 to project from the holding member 59 is formed integrally with the first projected piece 63 to extend from the proximal portion of the first projected piece 63 while being curved so as to project leftward, its proximal end distant from the first projected piece 63 being locked to the locking part 60 of the holding member 59 by a locking piece 68. The thin plate-like spring piece 67 which urges the second projected piece 64 to project from the holding member 59 is formed integrally with the second projected piece 64 to extend from the proximal portion of the second projected piece 64 below the spring piece 66 extending from the first projected piece 63, while being curved so as to project leftward, its proximal end distant from the second projected piece 64 being connected to the locking piece 68 together with the proximal end of the spring piece 66 to be locked to the locking part 60 of the holding member 59 by the locking piece 68. In other words, each of the  spring pieces  66 and 67 is constituted to separate from the locking piece 68 in two branches. The approximately sheet-like locking piece 68 extending upward is locked to the locking part 60 formed on the holding member 59. The operation part 65 is connected to the first projected piece 63 and projects upward from the first projected piece 63 to expose its upper surface from the holding member 59. When the operation part 65 held by the holding member 59 to be capable of sliding to the right direction slides rightward, the first  projected piece 63 connected to the operation part 65 is drawn in the holding member 59 while bending the spring piece 66 (see Fig. 14) . When the operation member 65 is released from the holding state, the spring piece 66 is restored to return the operation part 65 to the state before sliding, and the first projected piece 63 again makes the tip end portion 63a project from the left end surface 59a of the holding member 59.
As shown in Fig. 13, the locked member 70 located at the side of the side frame 8L comprises, on its right end surface 70a which is opposed to the left end surface 59a of the holding member 59, a first locking hole 71 and a second locking hole 72 capable of locking the first projected piece 63 and the second projected piece 64 at the respective peripheral edge. The first locking hole 71, formed on the right end surface 70a of the locked member 70 as a recess having an approximately rectangular cross-section so as to be capable of being inserted the tip end portion 63a of the first projected piece 63 projecting from the holding member 59, regulates the movement of the tip end portion 63a of the first projected piece 63 with its peripheral upper, lower, front and rear side surfaces. The second locking hole 72, located immediately below the first locking hole 71, is formed on the right end surface 70a as a recess having an approximately trapezoidal cross-section with an inclined upper surface 72a. The upper surface 72a of the second locking hole 72 is laterally inclined so as to locate the bottom of the recess at a lower position and to locate the opening of the recess at an upper position. As shown in Fig. 13, the upper surface 72a of the second locking hole 72 has the inclination angle to the lateral (horizontal) direction larger than that of the second projected piece 64 to the lateral (horizontal) direction, thus being capable of guiding the upwardly moving tip end portion 64a of the second projected piece 4 when lifting the tip end side part 19 of the door member 18 while sliding the operation part 65. Namely, in the embodiment, by lifting the holding member 59 while sliding the operation part 65 rightward and drawing the first projected piece 63 to move the tip end side part 19 of the door member 18 upward, the upwardly moving tip end portion 64a of the second projected piece 64 is guided by the upper surface 72a of the second locking hole 72 to be pushed into the holding member 59 by the upper surface 72a, thus releasing the locking state of the second projected piece 64 to the periphery of the second locking hole 72 of the second projected piece 64 (see Fig. 14) .
When opening the door member 18 of the gate G of the embodiment, by sliding the operating part 65 rightward while holding the holding member 59 to draw the first projected piece 63 to release the locking state to the periphery of the first locking hole 71 and by lifting the holding member 59 to move the tip end side part 19 of the door member  18 upward, the upwardly moving tip end portion 64a of the second projected piece 64 is guided by the upper surface 72a of the second locking hole 72 to be pushed into the holding member 59 by the upper surface 72a as shown in Fig. 14, thus releasing the locking state of the second projected piece 64 to the periphery of the second locking hole 72 to thereby release the locking state by the locking arrangement 58. Then, by rotating the door member 18 around the rotating axis part 28 to direct the tip end side part 19 forward or backward, the door member 18 can be opened. Thereafter, even when the open door member 18 is unhanded, the door member 18 automatically returns to the state where the tip end side part 19 is positioned close to the side frame 8L due to the restoration of the coil spring 49 located inside the upper axis part 29. Then, by moving the tip end side part 19 downward while inserting the second projected piece 64 into the second locking hole 72 from above along the upper surface 72a from the state where the operation part 65 has been slided rightward to draw the first projected piece 63 and the holding member 59 has been lifted to move the tip end side part 19 upward, the second projected piece 64 can be inserted into the second locking hole 72 to be locked to the periphery of the second locking hole 72. Subsequently, by unhanding the operation part 65, the operation part 65 returns to the state before sliding due to the restoration of the spring piece 66 and the first projected piece 63 again makes the tip end portion 63a project from the left end surface 59a of the holding member 59 to be inserted into the first locking hole 71, thereby locking the first projected piece 63 to the periphery of the first locking hole 71 to lock the opening of the door member 18 from the frame 1 (side frame 8L) by the locking arrangement 58.
In the gate G of the embodiment, the locking apparatus 58 for locking the door member 18 to the frame 1 (side frame 8L) comprises the first projected piece 63 and the second projected piece 64, among which the first projected piece 63 is constituted to be capable of releasing the locking state to the first locking hole 71 by sliding the operating part 65 located at the door member 18, and the second projected piece 64 is constituted to be capable of releasing the locking state to the second locking hole 72 only when the tip end side part 19 of the door member 18 is lifted while operating the operating part 65. In other words, in the gate G for infant of the embodiment, unless lifting the tip end side part 19 of the door member 18 to move the door member 18 upward in the direction orthogonal to the rotating direction of the door member 18 for opening while operating the operating part 65, the locking of both of the first projected piece and the second projected piece cannot be released simultaneously, and thus cannot open the door member 18. Since such  lifting operation of the door member 18 is difficult for an infant who tends to focus only on the rotating operation, the door member 18 can securely be prevented from being opened due to mistaken operation by an infant. In addition, in the gate G of the embodiment, only by lifting the tip end side part 19 of the door member 18, the locking arrangement 58 can be unlocked to open the door member 18 without lifting the entire door member 18. The door member 18 thus can be opened with light operation force, without need to lift the entire heavy door member 18.
Therefore, in the gate G of the embodiment, the door member 18 can securely be prevented from being opened due to operation by an infant.
In addition, in the gate G of the embodiment, the second locking hole 72 has an upper surface 72a inclined upward toward an opening so as to guide said second projected piece 64 moving upward as said door member 18 moves upward. Therefore, in the gate G of the embodiment, the tip end portion 64a the second projected piece 64 is guided by the upper surface 72a of the second locking hole 72 to be released from the locking state to the second locking hole 72 when the tip end side part of the door member is lifted. Since the locking state of the second projected piece 64 to the second locking hole 72 is thus released simply by lifting the tip end side part 19 of the door member 18, the door member 18 can be opened by an easy operation. Without taking such point in consideration, another operation part capable of drawing the second projected piece, for instance, can be provided.
Furthermore, in the gate G of the embodiment, a locking pin 24 which locks the lower end 19b of the closed door member 18 to the lower frame 3 and can be released from the locking state when the tip end side part 19 moves upward is positioned at the lower end 19b of the tip end side part 19 of the door member 18 while being urged to be capable of maintaining the projected state from the door member 18. Therefore, the lower end 19b of the closed door member 18 can stably be locked to the frame 1 (lower frame 3) by the locking pin 24. Furthermore, since the locking pin 24 is urged to be capable of maintaining the projecting state from the door member 18, the lower end 19b of the door member 18 can be locked to the lower frame 3 by the urging force when the once-opened door member 18 again becomes a closed state, thus providing superior operability. Without taking such point in consideration, the locking pin may not be positioned at the lower end of the tip end side of the door member. Although the locking pin 24 in the embodiment is urged to be capable of maintaining the projected state from the door member 18 due to its own weight, a spring for example can be used as the urging means.
[Explanation of References]
1. Frame
3. Lower Frame
4. Axis Body
5. Stopper
6. Locking Hole
8L, 8R. Side Frames
18. Door Member
19a. Upper End
19b. Lower End
24. Locking Pin
28. Rotating Axis Part
58. Locking Arrangement
63. First Projected Piece
64. Second Projected Piece
65. Operation Part
71. First Locking Hole
72. Second Locking Hole
72a. Upper Surface
D. Entrance
F. Floor Surface
WL, WR. Attaching Surface
G. Gate for Infant (Gate)

Claims (3)

  1. A gate for infant mounted on a floor surface in a building to close an opening between two attaching surfaces which are opposed to each other, comprising an approximately U-shaped frame attached to the attaching surfaces, a door member rotatably connected to the frame and a locking arrangement capable of regulating the opening of the door member from the frame, said frame comprising two side frames located at the sides of the attaching surfaces and a lower frame located at the side of the floor surface to connect the lower ends of the side frames to each other, said door member having an end rotatably connected to one of said side frames by a rotating axis part, and said locking apparatus is constituted to be capable of locking the tip end side part of the door member, which is the distal end of the rotating of the door member, to another of said side frames, wherein:
    said locking apparatus comprises a first projected piece and a second projected piece projecting from the tip end side part of the door member to the side of side frame of the frame, a first locking hole and a second locking hole formed on the side frame to be capable of locking the first projected piece and the second projected piece at its periphery and an operation part located at the side of the door member to be capable of releasing the locking state of the first projected piece to the first locking hole； and
    said second locking hole for locking the second projected piece has an upper surface inclined upward toward an opening so as to guide said second projected piece moving upward as said door member moves upward, and can be released from the locking state to the second projected piece only when the side of the tip end side part of the door member is lifted while operating the operation part.
  2. A gate for infant according to claim 1, wherein a locking pin capable of locking the lower end of the closed door member to the side of said lower frame and releasing the locking state to said lower frame when said tip end side part moves upward is provided at the lower end of said tip end side part of said door member, said locking pin being attached to said door member while being urged to be capable of maintain the projected state from the door member.
  3. A gate for infant according to claim 1 or 2, wherein a locking pin capable of locking the lower end of the closed door member to the side of said lower frame and releasing the locking state to said lower frame when said tip end side part moves upward is provided at the lower end of said tip end side part of said door member, said locking pin being attached to said door member while being urged to be capable of maintain the projected state from the door member.
PCT/CN2015/073858 2014-03-10 2015-03-09 Gate for Infant WO2015135451A1 (en)

Applications Claiming Priority (2)

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JP2014001219U JP3191949U (en) 2014-03-10 2014-03-10 Infant gate
JP2014-001219U 2014-03-10

Publications (1)

Publication Number Publication Date
WO2015135451A1 true WO2015135451A1 (en) 2015-09-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190145127A1 (en) * 2017-08-02 2019-05-16 Regalo International, Llc Push and Slide Gate Handle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114073384A (en) * 2020-08-17 2022-02-22 东莞康贝童车玩具有限公司 Chair

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Publication number Priority date Publication date Assignee Title
CN2340841Y (en) * 1998-07-30 1999-09-29 郑淑珍 Safety door grating
CN2630449Y (en) * 2003-07-22 2004-08-04 王艺军 Safety door rail for infants
GB2406612A (en) * 2002-07-31 2005-04-06 Tomy Co Ltd Safety fence for infant
US20050072086A1 (en) * 2003-09-23 2005-04-07 Lim Cheol Wang Child safety door having door locking device
JP2008142484A (en) * 2006-12-06 2008-06-26 Kazumi Honjo Safety gate for infant
US20110225890A1 (en) * 2010-03-17 2011-09-22 Mark Greenwood Gate with foot-operated latching mechanism
CN202300116U (en) * 2011-09-22 2012-07-04 上海意慧婴儿用品有限公司 Safety door guard rail
CN202520211U (en) * 2011-09-16 2012-11-07 好孩子儿童用品有限公司 Safety door

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2340841Y (en) * 1998-07-30 1999-09-29 郑淑珍 Safety door grating
GB2406612A (en) * 2002-07-31 2005-04-06 Tomy Co Ltd Safety fence for infant
CN2630449Y (en) * 2003-07-22 2004-08-04 王艺军 Safety door rail for infants
US20050072086A1 (en) * 2003-09-23 2005-04-07 Lim Cheol Wang Child safety door having door locking device
JP2008142484A (en) * 2006-12-06 2008-06-26 Kazumi Honjo Safety gate for infant
US20110225890A1 (en) * 2010-03-17 2011-09-22 Mark Greenwood Gate with foot-operated latching mechanism
CN202520211U (en) * 2011-09-16 2012-11-07 好孩子儿童用品有限公司 Safety door
CN202300116U (en) * 2011-09-22 2012-07-04 上海意慧婴儿用品有限公司 Safety door guard rail

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190145127A1 (en) * 2017-08-02 2019-05-16 Regalo International, Llc Push and Slide Gate Handle
US10774587B2 (en) * 2017-08-02 2020-09-15 Regalo International, Llc Push and slide gate handle

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