JPH0339090Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a children's chair in which a chair body having a backrest portion and a seating portion can be adjusted up and down in multiple steps.

(Prior Art) For children's chairs, for example,
As shown in the figure, a chair body 6 has a backrest 1, a seat 2, an armrest 3, a legrest 4, and a pair of left and right side plates 5 connecting these;
Some devices include a pair of left and right leg members 7 that support the. However, this type of conventional children's chair is
As shown in the figure, a pair of upper and lower bolt holes 8 are provided in the leg member 7, and a plurality of nuts 9 are embedded at intervals in the side plate portion 5 of the chair body 6 so as to correspond to the bolt holes 8. A bolt hole 10 communicating with the nut 9 is provided, and a bolt 1 is inserted into the bolt hole 8 of the leg member 7.
By inserting the bolts 1 into each nut 9 and selecting the nut 9 into which the bolt 11 is screwed, the chair body 6 is attached to the leg member 7.
It was designed to be installed in multiple units so that they can be adjusted vertically.

(Problem to be solved by the invention) Therefore, in the conventional case, in order to adjust the chair body 6 up and down, it is necessary to support the weight of the chair body 6 with your hands.
The bolt 11 and the nut 9 must be attached and detached, and this attachment and detachment requires a tool such as a wrench, making it extremely troublesome to adjust the chair body 6 up and down.

In view of the above-mentioned problems, the present invention enables the chair body to be easily and reliably adjusted up and down without the need for tools.

(Means for solving the problem) The technical means of the present invention for solving this technical problem includes a chair body 15 having a backrest portion 18 and a seating portion 17, and supporting the chair body 15. In a children's chair including a pair of left and right leg members 49, each leg member 49 has a forward tilting leg 50 and a backward tilting leg 51.
The upper end of one of the forward tilting leg 50 and the backward tilting leg 51 of each leg member 49 is , is rotatably supported on both left and right sides of the lower part of the chair body 15, and at the other upper end, locking shafts 53 are provided inwardly protruding in a plurality of stages corresponding to the left and right sides, and the lower part of the chair body 15 is rotatably supported. On both the left and right sides, rotation of the chair body 15 is restricted in a position where the seating portion 17 thereof is in a substantially horizontal state, and the intersecting angle between the forward tilting leg 50 and the backward tilting leg 51 of each leg member 49 is changed and held in a plurality of stages. In this way, an engaging member 56 that selectively engages with the plurality of stages of locking shafts 53 is provided, and a locking mechanism that holds the engaging member 56 in a state in which it is engaged with the locking shaft 53 is provided. It is at the point where it is set up.

(Function) By engaging the engaging member 56 with the upper locking shaft 53a, the leg member 49 extends up and down as shown in FIG. 1, and the chair body 15 is in a high position. The chair body 15 is restricted from rotating at a position where the seating portion 17 is in a substantially horizontal state. Engagement member 56
By engaging with the middle locking shaft 53a, the leg members 49 are vertically reduced as shown in FIG. 2 compared to the case in FIG. 3, and the chair body 15 is lowered to a slightly lower position, and this state is The rotation of the chair body 15 is restricted at a position where the seating portion 17 is in a substantially horizontal state.
By engaging the engaging member 56 with the lower locking shaft 53c, the leg member 49 is contracted to the maximum in the vertical direction as shown in FIG. 3, and the chair body 15 is further lowered. 15 is the seating part 17
Rotation is restricted at a position where the is approximately horizontal.

The locking mechanism such as the locking member 61 can hold the engaging member 56 in the engaged state with the locking shaft 53 as shown in FIG. By operating it, the lock by the lock mechanism is released, and
It is possible to easily disengage the engagement member 56 from the locking shaft 53.

(Embodiment) Hereinafter, the present invention will be explained according to the illustrated embodiment. In FIGS. 6 and 7, 15 is a chair body, and a seating part 17 connected between left and right side plates 16 and the side plates 16 is shown. and a backrest portion 18.

A pair of left and right armrest members 21 are provided at the upper end of the side plate 16, and are made of synthetic resin or the like.
As shown in FIGS. 10 to 10, the upper wall 22 and the partition wall 23
, the bottom wall 24 , the rear wall 25 , and these walls 22 , 23 , 2
It is integrally formed with an outer wall 26 that connects the outer ends in the left and right direction of 4 and 25, and is formed in a box shape with the inner end in the left and right direction open. This armrest member 21 is a side plate 16
They are attached to the outer surface of the upper end portion with screws 30, and the opening on the inner end side in the left-right direction of the armrest member 21 is closed by the side plate 16, and inside the armrest member 21 there are an outer wall 26, a partition wall 23, A holding hole 27 in the front-back direction is formed surrounded by the bottom wall 24, the rear wall 25, and the side plate 16, and a front end opening 28 is provided at the front end of the holding hole 27. A pair of locking recesses 29 are formed in the front part of the partition wall 23 and are recessed upward in a U-shape.

Reference numeral 31 denotes a tray, and the tray 31 has a pair of left and right support arms 32 that protrude rearward, and the support arms 32 have front end openings 28 in the holding holes 27 of the armrest member 21.
It is designed to be inserted and held so that it can be slid forward and backward. As shown in FIG. 9, this support arm 32 is provided with a storage recess 33 extending upward from the lower surface in the front-rear direction and a through hole 34 opening upward from the front end of the storage recess 33. An engaging body 35 is housed in the recess 33 in a state where it is rotatably supported around a pivot shaft 36 in the left-right direction. Engagement body 35
As shown in FIGS. 11 to 13, it has an engaging piece 37 that protrudes upward at its front end, a spring holding hole 38 whose upper end is open at its rear end, and an operating portion 39 that protrudes downward. As illustrated in FIG. The engaging piece 37 projects upward from the through hole 34 and engages with the locking recess 29 of the tray 31 so as to restrict forward sliding of the support arm 32 relative to the holding hole 27. The tray 31 can be removably engaged, and by selecting the locking recess 29 with which the engaging piece 37 engages, the tray 31 can be adjusted to move in two stages in the front and back direction. In addition,
In the illustrated example, a pair of locking recesses 29 are provided at the front and rear, but
Instead of this, three or more locking recesses 29 may be arranged in a row in the front-rear direction, so that the tray 3
1 can be moved and adjusted by three or more steps in the front-rear direction.

Reference numeral 43 denotes a footrest, which has a pair of left and right arms 44 that protrude rearward, and the rear end of each arm 44 is attached to a left and right shaft 45.
The front end side of the arm part 44 is supported by a support frame 46 connected between the front lower part of the side plate 16 of the chair body 15, so that the footrest 43 is in a substantially horizontal position. Retained.

Reference numeral 49 denotes a pair of left and right leg members that support the chair body 15, and as shown in FIGS. 1 to 3, the forward tilting legs 5
0 and the rearwardly tilted leg 51 are pivoted at the center in the longitudinal direction so as to be relatively rotatable about the left and right shaft 45 so as to intersect in an X shape. The pair of leg members 49 are connected to each other by the left and right shafts 45, the forward tilting legs 50 are connected to each other by a connecting rod 52, and the backward tilting legs 51 are connected to each other by connecting rods 53 and 54. ing.

The upper end of the forward tilting leg 50 of each leg member 49 is connected to the main body 1
By inserting the lower rear end of the side plate 16 of No. 5 and the upper end of the forward tilting leg 50 through both left and right ends of the support rod 46, the lower rear end of each side plate 16 of the chair body 15 can be freely rotated around the left and right axis. is supported by. Furthermore, three locking shafts 53a, 53b, and 53c are provided at the upper end of the backward tilting leg 51 of each leg member 49 to project inward at intervals in the vertical direction, and correspond to the left and right sides of the left and right leg members 49. The respective locking shafts 53a, 53b, 53c are integral with each other (each is composed of one shaft rod), and therefore the left and right leg members 49 are connected to each other by these locking shafts 53a, 53b, 53c. They are also connected to each other.

Reference numeral 56 denotes a pair of left and right engaging members provided at the lower rear end of each side plate 16 of the chair body 15, which are made of synthetic resin or the like, and are attached to the side plate 16 by screws 57 as shown in FIGS. 4 and 14. It is installed. As shown in FIGS. 5 and 15 to 19, this engaging member 57 has an engaging groove 58 whose lower end is open and a holding recess 5.
9, and the locking shafts 53a, 5 are provided in the engagement groove 58.
3b, 53c from the lower end, the engaging member 56 can be selectively and detachably engaged with each of the locking shafts 53a, 53b, 53c.
As shown in FIGS. 3 to 3, the rotation of the chair body 15 is restricted at a position where the seating portion 17 is in a substantially horizontal state, and the forward tilting leg 50 and the backward tilting leg 51 of each leg member 49 are
The intersection angle can be changed.

Reference numeral 61 denotes a pair of left and right locking members, which are made of synthetic resin or the like, and are rotatable about the screws 62 attached to the respective engaging members 56, as shown in FIGS. 4, 5, and 14. is attached to. This locking member 61 includes a through hole 63, a locking piece 64, an opening groove 65, and an operating piece 66 for rotating the locking member 61, as shown in FIGS. 4, 5, and 20 to 22. When the through hole 63 is rotated to correspond to the holding recess 59 of the engagement member 56, the lock piece 64 closes the lower end opening of the engagement groove 58, and the lock piece 64 closes the lower end opening of the engagement groove 58. The stop shaft 53 is locked into the engagement groove 58 so that it cannot be removed. Further, a stopper 67 is provided on the locking member 61 and protrudes outward in the left-right direction, and when this stopper 67 comes into contact with the edge of the engagement groove 58 of the engagement member 56, the locking member is locked as shown in FIG. The rotation of the locking member 61 in the direction of arrow b is restricted at the position where the opening groove 65 of the locking member 61 matches the engaging groove 58 of the engaging member 56 and the lower end opening of the engaging groove 58 is opened. ing.

As shown in FIG. 5, a bottomed cylindrical lock body 69 is housed in the holding recess 59 so as to be slidable in the left and right direction, and the lock body 69 is held in place by a spring 70.
9 so that the lock body 69 protrudes into the through hole 63 of the lock member 61. As shown in FIG. It is designed to be locked in a rotational position that prevents the lower end of the opening. A pressing piece 71 is held in the through hole 63 so as to be able to move inward and retract in the left-right direction, and by pressing the pressing piece 71 outward in the left-right direction, the lock body 69 resists the bias of the spring 70. and retreat into the holding recess 59,
The locking member 61 can be unlocked. Thus, the lock member 61, the spring 70, the pressing piece 71, the lock body 69, etc., lock the engaging member 56.
A locking mechanism is configured to hold the locking shaft 53 in a state where it is engaged with the locking shaft 53.

23 and 24 show a comparative example with the present invention, in which reference numeral 75 indicates a locking groove formed recessed in the rearward tilting leg 51, and 76 indicates a locking groove 75 formed in the rearward tilting leg 51.
A guide recess 77 recessed so as to communicate with the rear tilt leg 51 is connected to the rear tilt leg 51 so as to be continuous with the guide recess 76 .
A plurality of locking recesses are formed in the liquid in the longitudinal direction of the liquid. 78 is a locking shaft, 79 is a pair of left and right mounting members fixed to both ends of the locking shaft 78, 80 is a pair of support members fixed to the rear lower ends of both left and right sides of the chair body 15, and the locking shaft 78 is It is attached to the main body 15 via the attachment member 79 and the support member 80 so as to be rotatable around the axis. 81 is the mounting member 7 of the locking shaft 78
9. It is an oval-shaped locking member fixed outwardly,
Rotate the locking shaft 78 around the axis to lock the locking member 81.
By aligning the long axis of the lock member 81 with the width direction of the lock groove 75 and fitting the lock member 81 into the lock groove 75 in this state, the outer end 78a of the lock shaft 78 can be inserted into the lock recess 77 and cannot be pulled out. While engaging, the locking shaft 78
The outer end 78a of the locking shaft 78 can be removed from the locking recess 77 into the guide recess 76 by rotating the lock member 81 around its axis to align the short axis of the lock member 81 with the width direction of the lock groove 75. become. And the locking shaft 78
By moving the locking recess 77 along the guide recess 76 and selecting the locking recess 77 in which the locking shaft 78 engages, the intersecting angle between the forward tilting leg 50 and the backward tilting leg 51 of each leg member 49 can be set in multiple stages. The chair body 15 has been modified so that it can be adjusted up and down in multiple steps. 83 is a lock body housed in the holding recess 84 of the support member 80;
is a pressing piece that is held in the through hole 86 of the mounting member 79 so as to be freely retractable, and the locking shaft 78 is rotated so that the long axis of the locking member 81 coincides with the width direction of the locking groove 75, and the locking member 79 is locked. The outer end 78a of the shaft 78 is in the locking recess 7
7, the holding recess 84 aligns with the through hole 86, and the lock body 83 protrudes from the holding recess 84 into the through hole 86 under the bias of the spring 87, thereby making the locking shaft 78 unrotatable. At the same time, the pressing piece 85 is pressed to hold the lock body 83 in the recess 84.
It is configured so that the lock can be released by returning it to the inside. Note that 88 is a split pin externally fitted onto the locking shaft 78. . Although not shown in the drawings, similarly to the embodiment described above, the leg member 49 rotates relative to the left and right axes at the center in the longitudinal direction so that the forward tilting leg 50 and the backward tilting leg 51 intersect in an X shape. The upper end portions of the forward tilting legs 50 are rotatably supported around the left and right axes at the lower portions of the rear ends of the chair body 15 on both the left and right sides.

In the case of this comparative example, as in the case of the present invention,
Although the chair body 15 can be easily adjusted up and down without the need for tools, since the locking grooves 75, guide recesses 76, and locking recesses 77 are formed in the rear tilting legs 51, the rigidity of the rear tilting legs 51 is weakened and easily damaged. Moreover, there is a risk that the distance between the pair of left and right leg members 49 will increase due to the load, and the locking shaft 78 may come off from the locking recess 77, resulting in a lack of safety.

In the above embodiment, the locking shafts 53 are provided in three stages at the upper end of the backward tilting leg 51, but the locking shafts 53 are provided in two stages.
It is also possible to provide tiers or four or more tiers so that the chair body 15 can be adjusted up and down in two or 4 or more tiers.
Further, in the embodiment, each of the backward tilting legs 51 corresponding to the left and right
Although each of the locking shafts 53a, 53b, and 53c are integrally formed, the locking shaft 53 may be formed short and separately provided inwardly protruding from each of the backward tilting legs 51. Further, in the embodiment, the upper end of the forward tilting leg 50 is rotatably supported on the main body 15, and the rearward tilting leg 51 is rotatably supported on the main body 15.
A locking shaft 53 is provided at the upper end of the main body 15.
Although an engaging member 56 is provided on the rear end side, instead of this, the upper end of the backward tilting leg 51 is rotatably supported on the main body 15, and a locking shaft 53 is provided on the upper end of the forward tilting leg 50. In addition, an engaging member 56 may be provided on the front end side of the main body 15.

(Effect of the invention) According to the invention, the leg member 49 is
By changing the intersecting angle of the forward-tilting legs 50 and the backward-tilting legs 51, the chair body 15 can be adjusted up and down very easily without the need for tools or the like. Moreover, since the locking mechanism allows the engaging member 56 to be locked in the engaged state with the locking shaft 53, the chair body 15 can be reliably adjusted up and down without any fear of the engaging member 56 becoming disengaged unexpectedly. Moreover, it is excellent in safety, and its practical effects are significant.

[Brief explanation of drawings]

1 to 22 show an embodiment of the present invention, and FIGS. 1 to 3 are side sectional views of the leg member portion,
Fig. 4 is a side view of the engaging member portion, Fig. 5 is a sectional view taken along line A-A in Fig. 4, Fig. 6 is an overall side view, Fig. 7 is an overall perspective view, and Fig. 8 is an armrest member portion. 9 is a sectional view taken along the line B-B in FIG. 8, FIG. 10 is a side view of the armrest member portion, FIG. 11 is a side view of the engaging body, FIG. 12 is the same plan view, and FIG. The figure is a rear view of the same, FIG. 14 is a side view of the engaging member in an unlocked state, and FIG. 15 is a front view of the engaging member.
Fig. 16 is the same plan view, Fig. 17 is the same side view, and Fig. 17 is the same side view.
8 is a bottom view of the same, FIG. 19 is a sectional view taken along the line C-C of FIG. 15, FIG. 20 is a front view of the lock member, and FIG.
The figure is a side view of the same, and FIG. 22 is a sectional view taken along the line DD in FIG. 20. FIG. 23 is a perspective view showing a comparative example with the present invention, and FIG. 24 is a sectional view taken along the line E--E in FIG. 23. FIG. 25 is a side view showing a conventional example, and FIG. 26 is a sectional view taken along the line FF in FIG. 25. 15...Chair body, 17...Seating portion, 18...
Backrest portion, 49... Leg member, 50... Forward tilting leg, 5
1... Backward tilting leg, 53a, 53b, 53c... Locking shaft, 56... Engagement member, 61... Lock member, 6
9...Lock body, 70...Spring, 71...Press body.

Claims (1)

[Claims for Utility Model Registration] A children's chair comprising a chair body 15 having a backrest portion 18 and a seat portion 17, and a pair of left and right leg members 49 supporting the chair body 15, each of the leg members 49 are the forward tilting leg 50 and the backward tilting leg 51
The upper end of one of the forward tilting leg 50 and the backward tilting leg 51 of each leg member 49 is , is rotatably supported on both left and right sides of the lower part of the chair body 15, and at the other upper end, locking shafts 53 are provided inwardly protruding in a plurality of stages corresponding to the left and right sides, and the lower part of the chair body 15 is rotatably supported. On both the left and right sides, rotation of the chair body 15 is restricted in a position where the seating portion 17 thereof is in a substantially horizontal state, and the intersecting angle between the forward tilting leg 50 and the backward tilting leg 51 of each leg member 49 is changed and held in a plurality of stages. In this way, an engaging member 56 that selectively engages with the plurality of stages of locking shafts 53 is provided, and a locking mechanism that holds the engaging member 56 in a state in which it is engaged with the locking shaft 53 is provided. A children's chair characterized by the fact that it is provided with a child's chair.