JP2019150113A - Rack for infant - Google Patents

Abstract

To provide a rack for an infant, enabling swinging a chair part as if swinging in a state that a person holds an infant.SOLUTION: A rack for an infant includes: a chair part 10 in which a step part 33, a seat part 11 and a backrest part 23 are flatly expandable; and a support leg part 71 for supporting the chair part. The support leg part comprises left and right two upper side parts 72 for supporting the seat part swingably backward and forward, and a leg body part 84 for supporting the upper side parts. Two swing bars 77, 79 for supporting the seat part swingably with rotary motion to incline to an installation surface include: lower side connection parts 77a, 79a extending in the right and left directions and supporting the seat part rotatably; connection rod parts 77b, 79b extending upward from the lower side connection parts; and upper side connection parts 77c, 79c arranged at the upper end sides of the connection rod parts and rotatably connected to the left and right upper side parts. The connection rod parts 77b, 79b of the swing bars have angles from the vertical direction or linear dimensions SS, SL which are different from each other.SELECTED DRAWING: Figure 13

Description

  The present invention relates to an infant rack that can swing back and forth in a state where a chair portion on which an infant is seated is flatly deployed.

  Conventionally, as an infant rack, a chair portion having a seat portion, a backrest portion connected to the rear side of the seat portion, and a step portion connected to the front side of the seat portion, and a seat portion from the installation surface And a support leg portion that supports the chair portion so that the height can be adjusted (see, for example, Patent Document 1). The chair portion of the infant rack can be unfolded so that the backrest portion and the step portion are aligned with the seat portion in a substantially horizontal direction by a predetermined coupling mechanism. Also, the support legs are arranged on both the left and right sides of the seat, and the height of the left and right upper parts is adjusted by bringing the upper part supporting the seat so that it can swing back and forth, and the lower end abutting the installation surface. The leg main body part that supports the left and right upper parts can be adjusted. The support mechanism that supports the seat portion of the chair portion so as to be swingable back and forth is configured to include two swing bars that support the seat portion. Each of the two front and rear swing bars is formed in a substantially U shape by bending a metal rod such as steel, and is provided extending in the left-right direction on the lower end side and rotating in the front-rear direction. A lower connecting part that freely supports the seat part, a connecting hook part that extends upward from both left and right ends of the lower connecting part, and an upper end side of the left and right connecting hook parts, And an upper connecting portion that is rotatably connected in the front-rear direction. In this infant rack, the infant can be laid on a flatly deployed chair, and the chair can be swung back and forth to crawl and lie down.

JP-A-10-95346

  However, the conventional rack for infants has a structure in which the front and rear swing bars are arranged in parallel with each other along the vertical direction with mutual connecting collars having the same length when the seat portion stops swinging. Swing motion in the front-rear direction so that the swing motion of the seat (seat) is a parallelogram link mechanism, that is, the chair portion is parallel to the installation surface, and moves up and down However, this is different from the swinging motion in which a person swings while holding an infant, and there is room for improvement.

  This invention solves the above-mentioned subject, and it aims at providing the rack for infants which can rock a chair part so that a person may rock while holding an infant.

An infant rack according to the present invention includes a seat portion, a backrest portion connected to the rear side of the seat portion, and a step portion connected to the front side of the seat portion. A chair portion that allows a backrest portion and the step portion to be deployed with respect to the seat portion so as to extend along the substantially horizontal direction in connection with the seat portion;
A support leg portion that supports the chair portion, with the height of the seat portion from the installation surface as a predetermined height,
And configured with
The support legs are
An upper portion that is disposed on both left and right sides of the seat portion and supports the seat portion so as to be swingable back and forth;
A leg main body that supports the left and right upper parts by bringing a lower end into contact with the installation surface;
Configured with
The support mechanism that supports the seat portion so as to be swingable back and forth comprises a front and rear swing bar that supports the seat portion,
The two front and rear rocking bars are substantially U-shaped,
A lower connecting portion that is disposed on the lower end side so as to extend in the left-right direction, and that supports the seat portion so as to be rotatable in the front-rear direction;
A connecting collar extending upward from the left and right ends of the lower connecting portion;
An upper connecting portion that is disposed on the upper end side of the connecting hook portion on both the left and right sides, and is connected to the left and right upper portions so as to be rotatable in the front-rear direction,
An infant rack configured with:
In order to perform a swinging motion with a rotational motion that tilts the seat with respect to the installation surface,
The front and rear swing bars are arranged such that at the time of stopping the swing of the seat portion, at least one of the angle from the vertical direction of the connecting flange portion or the length dimension in the vertical direction is different. It is provided.

  In the infant rack according to the present invention, when the chair portion is swung in the front-rear direction in a state where the chair portion is flattened and the infant is laid down, the front and rear swing bars are in a state when the swing is stopped. Owing to at least one of the angle from the vertical direction and the length dimension in the vertical direction with respect to the mutual connecting collars, the rocking motion that translates up and down and back and forth like a parallelogram link mechanism And different. In other words, if the angle between the front and rear swing bars is different from each other in the vertical direction, when one lower connection portion of the front and rear swing bars is disposed at the lowest point, for example, In addition, if the lower connecting portion on the other side is located above the height position, or if the length dimensions of the mutual connecting flanges of the front and rear swing bars are different, For example, when the lower connecting portion on the side that shortens the length of the connecting collar is placed at the uppermost point, the lower side of the side that increases the length of the other connecting collar from its height position. As a result, the side connecting portion is disposed at the upper position, and as a result, the seat portion can be inclined to rotate with respect to the installation surface. Therefore, in the infant rack having such a configuration, when the seat is swung, the head is turned upward so that the head side and the foot side of the infant are raised sequentially while the person is holding the infant in a supine position. It can be a rocking motion combined with a motion.

  Therefore, in the infant rack according to the present invention, the chair portion can be swung so that the person swings while holding the infant.

And, in the infant rack according to the present invention, the front and rear swing bars are configured to vary the angle from the vertical direction of the mutual connecting hooks when the swing of the seat portion is stopped.
The swing bar on the front side has the lower connection part arranged in front of the upper connection part, and the swing bar on the rear side has the lower connection part arranged behind the upper connection part,
The front and rear rocking bars may be arranged as an arrangement position in which the mutual connecting collars are expanded in a downward-opening manner along the front-rear direction when the seat is stopped swinging.

  In such a configuration, the angle between the front and rear swing bars connected to each other is different from each other in the vertical direction, and when one lower connection portion of the front and rear swing bars is arranged at the lowest point, In addition, the other lower connecting portion is disposed at an upper position of the disposed position beyond the lowest point, and when returning, the reverse height position relationship is established. Therefore, in the infant rack having such a configuration, when the seat is swung, the head side and the foot side of the infant are sequentially raised in a state where a person is holding his / her infant on his back. It can be a swinging motion combined with a rotational motion. Further, in the configuration as described above, the front and rear rocking bars can be arranged such that the lower connection portion on the lower end side which is expanded is separated from the front and rear end sides of the seat portion of the chair portion. Thus, the seat can be stably supported, and a stable swinging motion can be secured. In addition, the upper connecting portion of the front and rear swing bars connected to the left and right upper portions is disposed between the front and rear lower connecting portions, that is, during the swinging motion of the chair portion, Since it approximates a pivoting motion with the upper connecting portion side as the center of rotation, the chair portion can be swung as a swinging motion with a smooth pivoting motion.

  In this case, if the front and rear swing bars have the same length in the vertical direction of the connecting collar, the swing of the seat can be swung between the front side and the rear side when swinging the seat. Can be made equivalent by movement.

  Of course, in the infant rack according to the present invention, the connecting hook portion of the rear swing bar may be made longer than the connecting hook portion of the front swing bar.

  In such a configuration, the rear part side of the seat part in the flatly deployed chair part, that is, the part on which the infant's head is placed on the rear part side of the backrest part, the step part from the front part side of the seat part. From the front side, the height can be displaced as a large turning radius. Therefore, when using an infant rack with an infant laid down on a flatly deployed chair, the infant's head side can be swung from the foot side with a slight displacement in height, as if In a state where the person is holding the infant, the head side of the infant is gently swung, which is suitable for easing the infant.

  Furthermore, in the infant rack according to the present invention, the front and rear swing bars are arranged with the same height from the installation surface of the lower connecting portion when the seat portion stops swinging. desirable.

  In such a configuration, the lower connecting portions of the front and rear swing bars can stably support the seat portion of the chair portion before swinging at a predetermined height from the installation surface. Therefore, not only the chair part in the flat deployed state, but also the chair part in the non-flat deployed state, that is, the step part is bent downward on the front side of the seat part, and the backrest part is raised upward on the rear side of the seat part. In addition, the chair part that can seat an infant on the seat part is also easily, well balanced and easily supported stably.

1 is a schematic perspective view of an infant rack according to an embodiment of the present invention. It is the schematic perspective view which removed the table in the rack for infants of an embodiment. It is a schematic side view in the infant rack of the embodiment. It is a schematic front view in the infant rack of the embodiment. It is a schematic perspective view of the state in which the chair part and the support leg part in the infant rack of the embodiment are separated. It is the schematic perspective view seen from the bottom face side of the chair part of the infant rack of the embodiment. It is a perspective view of the upper connection arm in the connection mechanism used for the infant rack of the embodiment. It is a schematic longitudinal cross-sectional view explaining the latching nail | claw of the upper connection arm at the time of falling down the backrest part of the infant rack of embodiment, and the latching hole part which inserts a latching claw. It is a schematic longitudinal cross-sectional view explaining the state which the headrest part at the time of falling down the backrest part of the infant rack of embodiment rises. It is a schematic perspective view of the state which developed the chair part of the infant rack of an embodiment flat. It is a schematic side view of the state which unfolded flat the chair part of the infant rack of an embodiment. It is a figure explaining the height adjustment mechanism of the support leg part in the rack for infants of an embodiment. It is a schematic side view explaining the state which rock | fluctuates the chair part of the infant rack of embodiment. It is the schematic side view which showed the movement locus | trajectory of the infant's foot | leg part and head when rock | fluctuating the chair part of the infant rack of embodiment. It is a schematic side view in the infant rack of other embodiment. It is a schematic side view explaining the state which rock | fluctuates the chair part of the infant rack shown in FIG. It is the schematic side view which showed the movement locus | trajectory of the infant's foot | leg part and head when rock | fluctuating the chair part of the infant rack shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 5, an infant rack 1 according to the embodiment supports a chair portion 10 on which an infant can sit and a chair portion 10. And a support leg 71.

  The chair portion 10 includes a seat portion 11, a backrest portion 23 connected to the rear side of the seat portion 11, and a step portion 33 connected to the front side of the seat portion 11. As shown in FIGS. 10 and 11, the chair portion 10 is connected to the seat portion 11 along the substantially horizontal direction with respect to the seat portion 11 by the coupling mechanism 41 as shown in FIGS. It can be deployed. Although not shown, a cushion material is disposed on the front side of the chair portion 10.

  The seat portion 11 includes a seat body portion 13 disposed at the center in the left-right direction, and armrest portions 15 (L, R) that protrude upward on the left and right sides of the seat body portion 13. On the lower surface side of the seat main body 13, a bearing portion 19 that rotatably supports the lower coupling portions 77 a and 79 a of the swing bars 77 and 79 in the support mechanism 76 on both the left and right sides of the front end side and the rear end side. (L, R) and 21 (L, R) project downward. Each bearing portion 19 (L, R), 21 (L, R) is a recess that opens downward so as to pivotally support the lower coupling portions 77a, 79a of the swing bars 77, 79 extending in the left-right direction. Grooves 19a and 21a are provided.

  The left and right armrests 15L and 15R are provided with locking holes 17. These locking holes 17 allow the stopper pin 74a of the stopper 74 disposed on the support leg portion 71 side to be inserted when the chair portion 10 is placed in a stationary state without swinging back and forth. Regulates forward and backward swinging.

  Furthermore, the left and right armrest portions 15L and 15R are respectively provided with assembly portions 15a for assembling the table 69.

  The backrest portion 23 includes a back main body portion 25 connected to the seat portion 11 and a headrest portion 31 disposed on the distal end side (upper end side) of the back main body portion 25. The back main body portion 25 includes a back plate portion 27 and overhang portions 29 (L, R) protruding from both left and right edges of the back plate portion 27. The spine main body 25 is connected to the seat 11 so as to be rotatable. As shown in FIGS. 6, 8, and 9, the spine body 25 is connected to the lower ends of the overhangs 29 </ b> L and 29 </ b> R. A shaft portion 43a that protrudes outward in the left-right direction is disposed, and each shaft portion 43a is inserted into a bearing portion 43b that opens to the armrest portions 15L and 15R, and the back body portion 25 of the backrest portion 23 is provided. The seat portion 11 is connected to the seat portion 11 so as to be pivotable up and down around a shaft portion 43a extending in the left-right direction.

  The headrest part 31 is connected to the back body part 25 so as to be rotatable, and the turning part 45 has a left-right direction on the distal end side of the back body part 25 as shown in FIGS. The shaft portion 45 a is intermittently disposed along the shaft portion 45, and the shaft portion 45 a is fitted and inserted into the sleeve-like bearing portion 45 b of the headrest portion 31. The shaft portion 45a extending in the direction is pivotally connected up and down with the rotation center as a rotation center.

  The step portion 33 includes a step body portion 35 extending downward from the front end side of the seat body portion 13 of the seat portion 11, and a leg bent at a tip (lower end) of the step body portion 35 so as to be orthogonal to the step body portion 35. A cover part 39 (L, R) for connecting the left and right edges of the mounting part 37, the step main body part 35 and the foot mounting part 37 to each other and closing the space between the step main body part 35 and the foot mounting part 37; It is configured with. The step portion 33 is connected to the seat portion 11 so as to be rotatable. As shown in FIGS. 3 and 5, the step portion 33 is connected to the front end of the seat main body portion 13 in the left-right direction. The shaft portion 47a is intermittently disposed, and each shaft portion 47a is fitted and inserted into the sleeve-shaped bearing portion 47b of the step portion 33 so that the step portion 33 extends in the left-right direction with respect to the seat main body portion 13. The extending shaft portion 47a is pivotably connected in the vertical direction with the shaft portion 47a as a rotation center.

  The connecting mechanism 41 for flatly deploying the chair portion 10 includes an upper connecting arm 49, a lower connecting arm 60, a push-up piece 66, and a bending piece 67 in addition to the above-described rotating parts 43, 45, 47. Configured.

  As shown in FIGS. 3 and 7 to 9, the upper connecting arm 49 includes a back side portion 50 disposed above the rotation shaft support portion 55 and a seat side portion 57 disposed below the rotation shaft support portion 55. And is configured. The pivot shaft support portion 55 protrudes along the left-right direction on the inner peripheral side of the insertion holes 13 a, 13 a (see FIG. 6) penetrating in the up-down direction disposed in the vicinity of the left and right sides on the rear side of the seat body portion 13. The shaft portion 56 (see FIGS. 8 and 9) is fitted and the upper connection arm 49 is connected to the seat body portion 13 so as to be rotatable in the front-rear direction. The back side portion 50 is disposed so as to extend upward from the rotating shaft support portion 55 to the rear surface side of the back plate portion 27 of the back main body portion 25, and the seat side portion 57 is opposite to the back side portion 50. The rotating shaft support portion 55 is disposed so as to extend to the lower side of the seat body portion 13.

  The dorsal side portion 50 has an inverted U-shape including left and right arm portions 50a and a substantially rectangular plate-like handle 53 that connects the upper ends of the arm portions 50a and 50a, and the lower ends of the arm portions 50a and 50a are The shaft portions 56 that extend into the left and right insertion holes 13 a and 13 a and project from the seat portion 11 (seat body portion 13) are inserted as the rotation shaft support portions 55. Further, the back side portion 50 is provided with locking claws 51 protruding upward on the left and right edges on the upper edge side of the handle 53, and these locking claws 51 are connected to the back plate portion of the back body portion 25. 27, the rising angle from the seat portion 11 of the backrest portion 23 can be adjusted by inserting it into the locking hole portion 64 arranged side by side in the vertical direction on the rear surface side of the rear surface 27 and locking it (see FIG. 8). ). If the locking claw 51 is inserted and locked in the lowermost locking hole 64, the backrest portion 23 has the largest rising angle, and the locking claw 51 is inserted and locked in the uppermost locking hole 64. Then, the backrest portion 23 has the smallest rising angle so that the back plate portion 27 of the backrest portion 23 is continuous with the seat main body portion 13 of the seat portion 11 along the substantially horizontal direction.

  Further, the back side portion 50 has two push-up pieces 52, 52 extending upward on the inner side in the left-right direction of the locking claws 51, 51 on the upper edge side of the handle 53. The upper end of each push-up piece 52 is a fitting portion 52a that extends along the vertical direction of the back plate portion 27 and is fitted into engagement grooves 63, 63 arranged side by side (see FIGS. 1 and 2). . Each fitting portion 52a can be brought into contact with the fitting portions 66a at the tips of the two left and right push-up pieces 66 extending from the headrest portion 31 of the backrest portion 23 so as to face each other vertically.

  The push-up pieces 66 and 66 of the headrest portion 31 are also configured to include a fitting portion 66a fitted into the engagement grooves 63 and 63 at the tip, and the left and right push-up pieces 66 are formed of the bearing portion 45b of the headrest portion 31. The shaft support portion 66b on the upper end side is fitted to the shaft portion 45d of the extending arm portion 45c projecting from (see FIGS. 8 and 9). These push-up pieces 66 have a fitting portion on the fitting portion 52a of the push-up piece 52 when the backrest portion 23 reduces the rising angle from the seat portion 11 and tries to spread flat along the seat portion 11. 66a is pushed, and the shaft portion 45d of the extended arm portion 45c is also pushed to rotate the bearing portion 45b, so that the headrest portion 31 is connected to the seat portion 11 and the back main body of the backrest portion 23 that is flattened. The part 25 (back plate part 27) is rotated so as to stand up and is disposed so as to surround the head of the infant. If the headrest portion 31 stands up in this way, the infant's head side is surrounded by the overhanging portions 29 (L, R) and the headrest portion 31 so as to prevent the infant from falling off the infant rack 1. be able to.

  The headrest portion 31 is provided with bending pieces 67 and 67 that extend from the vicinity of the bearing portion 45b and have their tips applied to the front side of the back plate portion 27 (see FIGS. 1, 2, and 10). The bending pieces 67, 67 have their tips applied to the front side of the back plate portion 27 and urge the headrest portion 31 to rotate rearward around the shaft portion 45a. Therefore, when the backrest portion 23 is raised after being flattened, the push-up piece 52 returns so as to move away from the shaft portion 45a side, and the fitting portion 66a of the push-up piece 66 moves away from the bearing portion 45b side. In this case, since the bending pieces 67 and 67 have their tips extending from the vicinity of the bearing portion 45b applied to the front surface side of the back plate portion 27, the headrest portion 31 is rearward with the shaft portion 45a as the rotation center. To return to be flat with the back plate portion 27. Further, when the headrest portion 31 is flattened so as to be continuous with the back plate portion 27, the position of the headrest portion 31 is restricted so that the vicinity of the extended arm portion 45c of the headrest portion 31 abuts on the back plate portion 27 and does not rotate any more. The

  The handle 53 of the back side portion 50 of the upper connecting arm 49 inserts and locks the locking claws 51 and 51 into the locking hole portion 64 at another position so as to adjust the rising angle from the seat portion of the backrest portion 23. When gripping. On the upper edge of the handle 53, a bending piece 54 that is bent and contacts the back surface of the back plate portion 27 is disposed. The bending piece 54 inserts and locks the locking claws 51 and 51 into predetermined locking holes 64 so as to adjust the rising angle of the back plate portion 27 (backrest portion 23) with respect to the seat body portion 13 (seat portion). In order to facilitate the angle adjustment operation, the back plate portion 27 that falls to the rear side is supported so that the locking claws 51 and 51 themselves can be easily detached from the back plate portion 27.

  Further, the left and right arm portions 50a of the back side portion 50 engage the locking claws 51 and 51 on the most distal end (uppermost end) side when the back main body portion 25 is flatly deployed with respect to the seat main body portion 13. Inserted and locked into the stop holes 64, 64 and stored in the storage grooves 13b, 13b provided on the left and right sides on the upper surface side of the seat body 13, and in contact with the bottom surface 13c of each storage groove 13b, The position is restricted, and the back main body 25 is configured not to rotate any more with respect to the seat main body 13 (see FIGS. 6 and 8).

  The seat side portion 57 of the upper connecting arm 49 is configured to include two left and right arm portions 57a extending downward from the rotation shaft support portion 55 on the lower surface side of the seat body portion 13, and the distal end (lower end) of each arm portion 57a. ) Are rotatably connected to the rear end of the lower connecting arm 60. The rotating portion 58 includes a shaft portion 58a protruding from the tip of each arm portion 57a along the left-right direction, and a bearing portion 58b into which each shaft portion 58a provided on the lower connecting arm 60 side is fitted. Thus, the arm portions 57a, 57a and the lower connecting arm 60 are disposed so as to be rotatable with respect to each other about a shaft portion 58a extending in the left-right direction (FIGS. 3 and 6). reference).

  As shown in FIGS. 3, 6, and 11, the lower connecting arm 60 reinforces the left and right arm portions 60 a extending forward from the bearing portion 58 b connected to each arm portion 57 a and the arm portions 60 a and 60 a. As described above, the reinforcing hook portions 60b and 60b are connected to the arm portions 60a and 60a in a cross shape, and the reinforcing hook portions 60c are connected to the arm portions 60a and 60a as a straight line along the left-right direction. Yes. The front end of each arm portion 60 a is rotatably connected to the step body portion 35 of the step portion 33. The rotating portion 61 includes a shaft portion 61a extending in the left-right direction at the front end of each arm portion 60a. The shaft portion 61a is fitted into the bearing portions 61b disposed on the left and right sides on the back side of the step body portion 35, so that the arm portion 60a The parts 60a, 60a and the step body part 35 of the step part 33 are disposed so as to be rotatable with respect to each other about a shaft part 61a extending in the left-right direction.

  As shown in FIGS. 1 to 5, the support leg portion 71 is disposed on both the left and right sides of the seat portion 11, and supports an upper portion 72 (L, R) that supports the seat portion 11 so as to swing back and forth, and a lower end. A leg body 84 that supports the left and right upper portions 72L and 72R so that the height of the left and right upper portions 72L and 72R can be adjusted by being brought into contact with the installation surface GL; The support mechanism 76 that supports the seat 11 so as to be swingable back and forth includes two swing bars 77 and 79 that support the seat portion 11.

  The two front and rear rocking bars 77 and 79 each have a substantially U-shape formed by bending a metal rod such as steel, and have a lower connecting portion 77a and a lower connecting portion 77a disposed on the lower end side so as to extend in the left-right direction. 79a, the connecting flanges 77b (L, R), 79b (L, R) extending upward from the left and right ends of the lower connecting parts 77a, 79a, and the upper ends of the connecting hook parts 77b, 79b on the left and right sides. The upper connecting portions 77c (L, R) and 79c (L, R) extending outward in the left-right direction are configured. The lower connecting portions 77a and 79a are fitted and inserted into the recessed grooves 19a and 21a of the front and rear bearing portions 19 (L, R) and 21 (L, R) provided on the lower surface side of the seat portion 11. 11 is rotatably supported in the front-rear direction. The upper connecting portions 77c (L, R) and 79c (L, R) are fitted into the bearing portions 72a disposed on the upper surface side of the left and right upper portions 72 (L, R), and the left and right upper portions 72 are inserted. With respect to (L, R), it is arranged to be rotatable in the front-rear direction.

  And the rocking | fluctuation bars 77 and 79 of the front and back of embodiment are mutually the length dimension SL and SS (refer FIG. 13) of the up-down direction of connection collar part 77b (L, R), 79b (L, R) mutually. It is different. In the case of the embodiment, the length dimension SL of the rear side connecting collar part 77b (L, R) is configured to be longer than the length dimension SS of the front side connecting collar part 79b (L, R). Yes. In the embodiment, the length dimension SL of the rear side connecting collar portion 77b (L, R) is approximately 1.1 to 1.2 of the length dimension SS of the front side connecting collar portion 79b (L, R). It is set to 1,12 times within the range of about twice. Specifically, the length dimension SL in the up-down direction of the connecting hook part 77b (L, R) on the rear side is about 185 mm, and the length dimension in the up-down direction of the connecting hook part 79b (L, R) on the front side. SS is about 165 mm.

  The left and right connecting collars 77b (L, R), 79c (L, R) in the front and rear swing bars 77, 79 are arranged so as to open in the left-right direction from the lower end side to the upper end side. The length dimension in the vertical direction is slightly smaller than the actual length dimension.

  In addition, the front and rear swing bars 77 and 79 differ in the angles θa and θb from the vertical direction of the connecting flange portions 77b and 79b when the seat portion 11 stops swinging. Specifically, the front swing bar 77 has the lower connecting portion 77a disposed in front of the upper connecting portion 77c, and the rear swing bar 79 has the lower connecting portion 79a connected to the upper connecting portion 79c. Arranged at the rear, the connecting rod portion 77b of the front swing bar 77 is provided with an angle θa to the front side from the vertical direction, and the connecting flange portion 79b of the rear swing bar 79 is provided from the vertical direction. An angle θb toward the rear side is provided.

  That is, in the embodiment, the front and rear swing bars 77 and 79 are configured such that the stopper pin 74a of the stopper 74 disposed on the support leg portion 71 side is inserted into the locking hole 17 of the armrest portion 15 to When the swinging is restricted, the mutual connecting collars 77b and 79b are arranged as positions where the connecting flanges 77b and 79b are expanded in the downward direction along the front-rear direction. In the case of the embodiment, the downward opening angle θ (see FIG. 3) of the mutual connecting collars 77b and 79b is about 20 °, the angle θa is 10 °, the angle θb is 10 ° (clockwise from the vertical direction + Then, the angle θa and the angle θb are different angles as the inclination angle from the vertical direction.

  Furthermore, when the stopper pin 74a of the stopper 74 disposed on the support leg portion 71 side is inserted into the locking hole 17 of the armrest portion 15 to restrict the swing of the chair portion 10, the front and rear swing bars 77, In 79, the upper side connection part 79c is made higher than the front side upper connection part 77c as the height position from the installation surface GL in which the upper side connection parts 77c and 79c are inserted into the bearing part 72a of the upper part 72. However, the lower connecting portions 77a and 79a are arranged corresponding to the bearing portions 19 and 21 of the seat portion 11 with the same height dimension HL (see FIG. 3) from the installation surface GL.

  Each stopper 74 is disposed on the front side of the upper portions 72L and 72R. Each stopper 74 has a lower end side as an operation portion 74b, an upper end side provided with a stopper pin 74a protruding outward in the left-right direction, and a vertical intermediate portion as a bearing portion 74c in front of the upper portions 72L and 72R. A shaft portion 72b extending forward from the portion side is fitted. Each stopper 74 pushes the operation portion 74b side to the center side in the left-right direction of the seat main body portion 13 so that the stopper pin 74a is projected outward, and the stopper pin 74a is placed on the armrest 15L, 15R is inserted into each of the locking holes 17 to obtain a locking position FP (see FIG. 4) where the swing of the chair portion 10 is stopped, and the operation portion 74b side is pulled out and the stopper pin 74a is moved inward. The retracted position is set as an unlocking position RP that allows the chair portion 10 to swing by detaching the stopper pin 74a from each locking hole 17. Each stopper 74 is inserted into the shaft portion 72b so as to stop at the locking position FP and the locking release position RP.

  The leg main body 84 is provided with four leg members 85 so as to intersect each other on the left and right sides. The pair of leg members 85 on both the left and right sides are pivotally supported by a pivotal support 87 so that the crossing angle can be changed at the intersection of the intermediate part in the vertical direction, and the upper end is also rotated in the front-rear direction by the pivotal support 88. It is pivotally supported on the upper portions 72L and 72R. A wheel 86 made of caster wheels is disposed at the lower end of each leg member 85.

  As shown in FIG. 12, height adjustment mechanisms 90 that adjust the heights of the upper portions 72L and 72R are disposed in the left and right upper portions 72L and 72R, respectively, and include a slide bar 91, a tension spring 92, and A stopper 93 is provided. The slide bar 91 is disposed so as to be movable in the front-rear direction in the left and right upper portions 72L, 72R, and is urged forward by a tension spring 92 connected thereto. The leg member 85 disposed so as to cross front and rear on both the left and right sides connects the shaft support portion 88 of the leg member 85B with the upper end disposed on the front side to the upper side portions 72L and 72R, and the upper end on the rear side. The shaft support portion 88 of the leg member 85F to be disposed on the rear end of the slide bar 91 is connected to the rear end side. Further, the slide bar 91 is formed with a plurality of adjustment holes 91a arranged in parallel in the front-rear direction on the upper side. The upper portion 72 (L, R) is provided with a stopper 93 that is operated so as to swing in the left-right direction. A fitting projection 93a provided on the stopper 93 is provided in the adjustment hole 91a at a predetermined position. It is provided so that it can be fitted.

  In the height adjustment mechanism 90 of the embodiment, when adjusting the heights of the upper portions 72L and 72R, first, the operation portions 93b of the stoppers 93 on both the left and right sides are pulled outward, and the fitting protrusions 93a are removed from the fitted adjustment holes 91a. For example, the upper portions 72L and 72R are lowered. At that time, the leg member 85F pivotally supported on the slide bar 91 falls together with the leg member 85B pivotally supported on the upper portion 72 itself so as to approach the installation surface GL (see FIG. 3). At that time, the slide bar 91 moves backward against the urging force of the tension spring 92, and the adjustment hole 91a fitted before the height adjustment moves backward, and is positioned forward of the adjustment hole 91a. The predetermined adjustment hole 91a that has been placed is arranged at a position that matches the fitting protrusion 93a of the stopper 93 (see FIGS. 12A and 12B), and then the stopper 93 is returned to match the fitting protrusion 93a. When fitted in the adjustment hole 91a, the forward / backward movement of the slide bar 91 is stopped, and the separation distance between the axial support portions 88, 88 on the upper end side of the front / rear leg members 85F, 85B is adjusted, and the upper portion 72L is adjusted. , 72R from the installation surface GL is adjusted, and the height of the seat 11 supported by the upper portions 72L, 72R from the installation surface GL is also adjusted.

  In the infant rack 1 according to the embodiment, when the chair portion 10 is unfolded flat, the handle 53 of the upper connecting arm 49 is pulled backward, and the locking claws 51 and 51 of the upper connecting arm 49 are inserted. The locking claw portion 64 is pulled out and the backrest portion 23 is tilted backward to insert and lock the locking claws 51, 51 into the locking hole portion 64 at the uppermost end, and the upper connecting arm 49. The arm part 50a of the back side part 50 is applied to the bottom surface 13c of the storage groove 13b of the seat body part 13 (see A and B in FIG. 8, A and B in FIG. 9). Then, the back plate portion 27 in the back main body portion 25 of the backrest portion 23 is developed so as to be flat with respect to the seat main body portion 13 of the seat portion 11.

  At that time, the headrest portion 31 of the backrest portion 23 is such that the fitting portion 66a of the push-up piece 66 is pushed by the fitting portion 52a of the push-up piece 52 of the upper connecting arm 49, and the extending arm portion 45c is combined with the bearing portion 45b. Since it rotates around the shaft portion 45a, it rises so as to be orthogonal to the back plate portion 27. Further, if the arm portion 50a of the upper connecting arm 49 is rotated backward around the rotation shaft support portion 55 so as to hit the bottom surface 13c of the storage groove 13b, the seat side portion 57 of the upper connecting arm 49 is moved to the arm portion 57a. The front end shaft portion 58a is moved forward, and the lower connecting arm 60 is also moved forward. Therefore, the step part 33 rotates around the shaft part 47a of the rotation part 47, and the step main body part 35 is deployed so as to be flat with respect to the seat main body part 13 of the seat part 11, and as a result, As shown in FIGS. 10 and 11, the chair portion 10 is configured such that the back plate portion 27 of the backrest portion 23 and the step main body portion 35 of the step portion 33 are placed with respect to the seat main body portion 13 of the seat portion 11. It will be unfolded so that it will run along the horizontal direction.

  In this state, if the operation portion 74b of the stopper 74 is pulled outward, the stopper pin 74a is pulled into the armrest portion 15 (L, R), removed from the locking hole 17, and placed at the locking release position RP. The chair part 10 can be swung back and forth.

  And as shown to A, B, and C of FIG. 13, when the chair part 10 is expand | deployed flat and the chair part 10 is rock | fluctuated in the front-back direction, the front-back rocking | swiveling bars 77 and 79 will mutually become, Since the vertical lengths SS and SL of the connecting collars 77b and 79b are different, unlike a swinging motion that translates up and down or back and forth like a parallelogram link mechanism, a person is facing upward. In the state where the infant is held, the swinging motion with the rotational motion can be made such that the head side and the foot side of the infant are sequentially raised.

  Therefore, in the infant rack 1 according to the embodiment, the chair portion 10 can be swung so that the person swings while holding the infant.

  In the embodiment, the connecting hook portion 79b of the rear swing bar 79 is longer in the vertical direction than the connecting hook portion 77b of the front swing bar 77 (SL> SS).

  Therefore, in the embodiment, the rear part side of the seat part 11 in the chair part 10 deployed flat, that is, the part on which the infant's head on the rear part side of the backrest part 23 is placed, from the front part side of the seat part 11, That is, the height can be displaced as a large turning radius from the front side of the step portion 33. Therefore, when using the infant rack 1 in a state where the infant is laid down on the chair portion 10 that is flatly spread, the infant's head side can be swung with a slight height displacement from the foot side. As if the person is holding the infant, the head side of the infant is gently rocked, which is suitable for raising the infant.

  By the way, as shown in FIG. 14, the initial placement position of the foot of the infant laid on the chair 10 is B0 (see A in FIG. 13), and the initial placement position of the head is H0 (see A in FIG. 13). When the chair part 10 is swung backward and then the front part is swung, the foot part moves as B0 → B1 → B2 → B3 → B4 → B5 → B6 → B7 as a movement locus BT1, , B7-> B8-> B9-> B10-> B11-> B12-> B13-> B14-> B15-> B0 and move as a movement locus BT2. The head moves as a movement locus HT1 as H0 → H1 → H2 → H3 → H4 → H5 → H6 → H7, and further as H7 → H8 → H9 → H10 → H11 → H12 → H13 → H14 → H15 → H0. , And moves as a movement locus HT2.

  Comparing the two, in the head movement trajectories HT1 and HT2, the longitudinal movement width XH and the vertical movement width YH are both larger than the forward and backward movement width XB and the vertical movement width YB of the foot movement trajectories BT1 and BT2. From this, it can be seen that the infant's head side is gently rocked.

  Furthermore, in the foot movement trajectories BT1 and BT2, the foot travels from the initial placement position B0 to the lower position B1, then rises to positions B2, B3, and B4, and then descends to positions B5, B6, and B7. Further, the trajectory rises to positions B8, B9, B10, B11, B12, then descends to positions B13, B14, B15, and rises twice from the lowest points B1, B7. On the other hand, the head movement trajectories HT1 and HT2 rise from the initial arrangement position H0 to positions H1, H2, H3, and H4, and descend to positions H5, H6, H7, H8, H9, and H10. The trajectory moves to positions H11 and H12 having the same height as H10, and sequentially rises to positions H13, H14, and H15. That is, in the front and rear swing bars 77 and 79, compared to the movement trajectory HT1 and HT2 of the infant's head supported by the swing bar 79 on the rear side of the long side of the connecting collars 77b and 79b, The movement trajectories BT1 and BT2 have two distinct ascending trajectories, and the infant's foot side moves up and down suddenly, while the head side moves slowly up and down. I understand that.

  Further, in the embodiment, when the stopper pin 74a of the stopper 74 is inserted into the locking hole 17 and the seat portion 11 stops swinging, the front and rear swing bars 77 and 79 are connected to each other by the mutual connecting flange portion. 77b and 79b are disposed as the disposition positions that are expanded in a downward-opening manner along the front-rear direction.

  Therefore, in the embodiment, the front and rear rocking bars 77 and 79 are separated from the front and rear end sides of the seat portion 11 of the chair portion 10 by separating the lower connection portions 77a and 79a of the lower end side expanded. The seat portion 11 can be stably supported, and a stable swinging motion can be ensured. Further, the upper connection portions 77c and 79c of the front and rear swing bars 77 and 79 connected to the left and right upper portions 72L and 72R are disposed between the front and rear lower connection portions 77a and 79a. That is, when the chair portion 10 swings, the chair portion 10 approximates a rotational motion with the front and rear upper coupling portions 77c and 79c as the center of rotation. The part 10 can be swung.

  Further, in the infant rack 1 of the embodiment, the front and rear swing bars 77 and 79 have the height dimension HL from the installation surface GL of the lower connecting portions 77a and 79a when the seat portion 11 stops swinging. It is arranged as equivalent.

  For this reason, in the embodiment, the lower connecting portions 77a and 79a of the front and rear swing bars 77 and 79 stabilize the seat portion 11 of the chair portion 10 before the swing with a predetermined height from the installation surface GL. Can support. As a result, not only the chair portion 10 in a flatly deployed state, but also the chair portion 10 in a non-flattened state, that is, on the front side of the seat portion 11, the step portion 33 is bent downward, and on the rear side of the seat portion 11. The chair portion 10 that can raise the backrest portion 23 upward and seat an infant on the seat portion 11 can be easily and well balanced and easily supported.

  In the infant rack 1 of the embodiment, the connecting hook 79b of the rear swing bar 79 is longer in the vertical direction than the vertical dimension SS of the connecting hook 77b of the front swing bar 77. The length SL was increased. However, the reverse configuration, that is, the connecting hook 79b of the rear swing bar 79 has a vertical length SL from the vertical dimension SS of the connecting hook 77b of the front swing bar 77. May be shortened. In such a configuration, when the chair portion 10 is flattened and swung back and forth, the rear portion side of the chair portion 10 having a short length of the connecting collar portion 79b is sharply compared with the front portion side of the chair portion 10. It can be a swing that displaces the height.

  In the infant rack 1 according to the embodiment, when the front and rear swing is stopped, the two front and rear swing bars 77 and 79 have the lower connecting portions 77a and 79a extended in a bar shape in the left and right direction, and the upper side. The connecting portions 77c and 79a are expanded from the side, but when the front and rear swinging is stopped, the connecting flange portions 77b and 79b having different lengths are parallel to each other, and directly below the upper connecting portions 77c and 9c. Further, the lower connecting portions 77a and 79a may be disposed. Furthermore, if the chair portion 10 can be stably supported, the two front and rear swing bars 77 and 79 are extended from the lower connecting portions 77a and 79a extending in the left and right directions when the front and rear swinging is stopped. You may arrange | position so that it may expand upward toward 77c, 79a side.

  Furthermore, in the infant rack 1 according to the embodiment, the lower side connecting portions 77a and 79a of the lower ends of the swing bars 77 and 79 having different vertical lengths when the front and rear swing is stopped, The case where the height dimension HL from the installation surface GL is mutually equivalent is shown. However, when the front and rear swings are stopped, the upper connecting portions 77c and 79c on the upper ends of the swing bars 77 and 79 having different vertical lengths have different heights from the installation surface GL. May be equivalent to

  In addition, as the rack for infants, the front and rear swing bars are arranged so that the swinging movement of the front and rear of the seat portion can be performed while the swinging motion of the seat portion is stopped. What is necessary is just to arrange | position so that at least one of the angle from the perpendicular direction in a connection collar part, or the length dimension of an up-down direction may differ, and it is comprised like the rack 1A for infants shown in FIGS. May be.

  This infant rack 1A is configured so that the connecting hooks 77b and 79b of the front and rear swing bars 77A and 79A have the same length dimension SM of about 165 mm, and the angle θa, θb is varied. That is, the connecting hook portion 77b of the front swing bar 77A is provided with an angle θa (about 5 °) forward from the vertical direction, and the connecting hook portion 79b of the rear swing bar 79A is the vertical direction. Angle θb from the rear to the rear side (about 5 °, -5 ° if the clockwise angle from the vertical direction is plus) is provided below the connecting flanges 77b and 79b of the swing bars 77A and 79A. The opening angle θA is 10 °. In this infant rack 1A, the front and rear swing bars 77A, 79A have the same length dimension SM of the connecting collars 77b, 79b, and the lower connecting parts 77a, 79b and the upper connecting parts 77c, 79c The height dimension HL from the installation surface GL is made equal, and the angles θa and θb of the connecting collar portions 77b and 79b are set to be +/- symmetrically arranged in the front-rear direction.

  In the infant rack 1A, the front and rear swing bars 77A and 79A are different from each other in the configuration of the connecting collar portions 77b and 79b and the configurations of the bearing portions 19, 21, and 72a corresponding thereto. The other configurations are the same as those of the infant rack 1 of the embodiment, and the same reference numerals are given to the respective parts as much as possible, and the description thereof is omitted.

  Also in this infant rack 1A, the operation portion 74b of the stopper 74 is pulled outward, the stopper pin 74a is pulled into the armrest portion 15 (L, R), is extracted from the locking hole 17, and the locking release position RP (FIG. 4), the chair portion 10A can be swung back and forth. Then, as shown in FIGS. 16A, 16B and 16C, when the chair portion 10A of the infant rack 1A is unfolded flat and the chair portion 10A is swung in the front-rear direction, the front and rear swing bars 77A, 79A The angles θa (+ 5 °) and θb (−5 °) from the installation surface GL of the mutual connecting collars 77b and 79b are different, and one lower connecting part 77a of the front and rear swing bars 77A is the When arranged at the lower point, the other lower connecting portion 79a is arranged at the upper position of the arrangement position beyond the lowest point, and when returning, the opposite height position relationship is established. . Therefore, in the infant rack 1A having such a configuration, when the seat 11A is swung, the head side and the foot side of the infant are sequentially raised in a state where the person is holding the infant in a supine position, It can be a swinging motion with a stable rotational motion.

  Of course, in this infant rack 1A, the front and rear swing bars 77A and 79A have the same vertical length SM of the connecting collar portions 77b and 79b, and when the seat portion 11A is swung, The inclination of the seat portion 11A can be made equal by swinging the front side and the rear side, and the seat portion 11A can be swung as a swing motion with a good balance between the front and rear.

  Also, in this infant rack 1A, the front and rear swing bars 77A and 79A expand the lower connection portions 77a and 79a of the lower end side to the front and rear end sides of the seat portion 11A of the chair portion 10A. The seat portion 11A can be stably supported, and a stable swinging motion can be ensured. Further, the upper connection portions 77c and 79c of the front and rear swing bars 77A and 79A connected to the left and right upper portions 72 (L and R) are disposed between the front and rear lower connection portions 77a and 79a. That is, when the chair portion 10A swings, it approximates a pivoting motion with the front and rear upper coupling portions 77c and 79c as the center of rotation. As described above, the chair portion 10A can be swung.

  Incidentally, as shown in FIG. 17, the initial placement position of the foot of the infant laid on the chair portion 10A is F0 (see A in FIG. 16), and the initial placement position of the head is K0 (see A in FIG. 16). When the chair part 10A is swung backward and then the front part is swung, the foot part moves as a movement trajectory FT1 as F0 → F1 → F2 → F3 → F4 → F5 → F6 → F7. , F7-> F8-> F9-> F10-> F11-> F12-> F13-> F14-> F15-> F0 as the movement locus FT2. At the head, it moves as a movement locus KT1 as K0 → K1 → K2 → K3 → K4 → K5 → K6 → K7, and further as K7 → K8 → K9 → K10 → K11 → K12 → K13 → K14 → K15 → K0. And move as a movement locus KT2.

  Comparing the two, the front / rear movement width XAK and the vertical movement width YAK are both equal to the front / rear movement width XAF and the vertical movement width YAF, and the movement trajectory KT1 of the first half of the head and the foot The movement trajectory FT2 in the second half of the head part is symmetric in the front-rear direction, and the movement trajectory KT2 in the second half of the head part and the movement trajectory FT1 in the first half of the foot part are symmetric in the front-rear direction. It can be seen that the seat portion 11A is swung.

  Note that, as described above, the infant rack is provided with front and rear swing bars so that the seat swings with a rotational motion that tilts the seat with respect to the installation surface. At the time of stopping, it is only necessary to dispose at least one of the angle from the vertical direction in the connecting hook part or the length dimension in the vertical direction, as in the infant rack 1A. In the case where the lengths of the connecting hooks 77b and 79b are equal, the connecting hooks 77b and 77b may be opened upward from each other because the angles of the connecting hooks may be different from each other in the vertical direction. It may be arranged at an angle. Of course, when the mutual connecting hooks are arranged at different angles from the vertical direction, one of the connecting hooks extends along the vertical direction as the front and rear swing bars when the swing is stopped. It may be arrange | positioned and it may arrange | position as an angle which the other connection collar part cross | intersects with respect to the connection collar part. Such an angle configuration can also be applied when the connecting hooks of the front and rear swing bars have different lengths.

  When the chair portions 10 and 10A are swung back and forth by human power, the connecting collar portions 77b and 79b are opened downward along the front-rear direction in order to ensure the swinging motion of the chair portions 10 and 10A that is difficult to attenuate. The angles θa and θAa to be expanded in a shape are in the range of about 3 to 10 °, the angles θb and θAb are in the range of about −3 to −10 °, and the angles θa, θAa, θb, and θAb are symmetrical in the longitudinal direction. It is desirable to set it automatically. Of course, the angles θa and θAa are also in the range of about −3 to −10 °, and the angles θb and θAb are in the range of about 3 to 10 °. , Θb, θAb are preferably set symmetrically in the front-rear direction.

DESCRIPTION OF SYMBOLS 1,1A ... Rack for infants, 10, 10A ... Chair part, 11, 11A ... Seat part, 13 ... Seat main part, 23 ... Backrest part, 25 ... Back main part, 33 ... Step part, 35 ... Step main part, DESCRIPTION OF SYMBOLS 41 ... Connection mechanism, 43, 47 ... Rotation part, 49 ... Upper connection arm, 50 ... Back side part, 55 ... Rotation shaft support part, 57 ... Seat side part, 60 ... Lower connection arm, 71 ... Support leg part 72 (L, R) ... upper part, 76 ... support mechanism, 77, 77A, 79, 79A ... swing bar, 77a, 79a ... lower connection part, 77b (L, R), 79b (L, R) ... connection collar part, 77c (L, R), 79c (L, R) ... upper connection part, 84 ... leg main body part,
GL ... installation surface, θa, θAa, θb, θAb ... (angle with respect to the installation surface of the connecting hook), θ, θA ... (opening between the connecting hooks), HL ... (from the installation surface of the lower connecting part) ) Height dimensions, SS, SL, SM ... (length in the vertical direction of the connecting collar).

Claims (5)

A seat portion, a backrest portion connected to the rear side of the seat portion, and a step portion connected to the front side of the seat portion, and the backrest portion and the step portion by a connecting mechanism, With respect to the seat portion, a chair portion that can be deployed so as to be aligned with the seat portion in a substantially horizontal direction;
A support leg portion that supports the chair portion, with the height of the seat portion from the installation surface as a predetermined height,
And configured with
The support legs are
An upper portion that is disposed on both left and right sides of the seat portion and supports the seat portion so as to be swingable back and forth;
A leg main body that supports the left and right upper parts by bringing a lower end into contact with the installation surface;
Configured with
The support mechanism that supports the seat portion so as to be swingable back and forth comprises a front and rear swing bar that supports the seat portion,
The two front and rear rocking bars are substantially U-shaped,
A lower connecting portion that is disposed on the lower end side so as to extend in the left-right direction, and that supports the seat portion so as to be rotatable in the front-rear direction;
A connecting collar extending upward from the left and right ends of the lower connecting portion;
An upper connecting portion that is disposed on the upper end side of the connecting hook portion on both the left and right sides, and is connected to the left and right upper portions so as to be rotatable in the front-rear direction,
An infant rack configured with:
In order to perform a swinging motion with a rotational motion that tilts the seat with respect to the installation surface,
The front and rear swing bars are arranged such that at the time of stopping the swing of the seat portion, at least one of the angle from the vertical direction of the connecting flange portion or the length dimension in the vertical direction is different. An infant rack characterized by being installed. The front and rear swing bars are configured to vary the angle from the vertical direction of the connecting hooks when the seat is stopped swinging.
The front rocking bar has the lower connecting portion disposed in front of the upper connecting portion, and the rear rocking bar has the lower connecting portion disposed behind the upper connecting portion. ,
The front and rear rocking bars are disposed at positions where the mutual connecting flanges are expanded in a downward-opening manner along the front-rear direction when the swing of the seat is stopped. The infant rack according to claim 1.   The infant rack according to claim 2, wherein the front and rear swing bars have the same length in the vertical direction of the connecting hook part.   3. The length of the connecting flange portion of the swing bar on the rear side is longer than that of the connecting flange portion of the swing bar on the front side. Infant rack.   The front and rear rocking bars are disposed such that the heights of the lower connecting portions from the installation surface are equal when the seat portion is stopped rocking. The infant rack according to claim 4.

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