JP2002325659A - Baby chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a locking device of a baby chair which holds the table board with an upper arm moving in concert not to wear down or not to damage the bottom side of the table board by rubbing. SOLUTION: This baby chair 1 is equipped with an upper arm 4 and a lower arm 17. Each arm 4, 17 can be caught on a table board 19 by making the end of the arm abut on the top and the bottom of the table board 19. A bolt 25 for fixation is joined to a cylinder 21 for engaging a bolt provided in the middle of the lower arm 17 in a manner that the bolt 25 for fixation can make vertical movements and no rotary movements. A pad 27 at the upper end of the bolt 25 for fixation is made to abut on the bottom side of the table board 19 without making rotations by screwing a nut with a tag 24 manually, and is tighten up further.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a baby chair which is used by being attached to various indoor or outdoor tables.

[0002]

2. Description of the Related Art As shown in FIG. 4, a baby chair 50 of this type has an upper arm 51 abutting on a portion near an upper edge of a table plate 56 and a portion deeper than an edge of a lower surface of the table plate 56. The lower arm 54 is brought into contact with the table plate 56 so as to be locked. 52 is a cap and 53 is a connection pipe. However, since the baby chair 50 is not fixed only by the locking, there is a possibility that the baby chair 50 may be displaced or come off when the infant on the seat moves. So baby chair 50
Is fixed to the base plate of the lower arm 54 in cooperation with the upper arm 51 so as to clamp the table plate 56.

More specifically, as shown in FIG. 4, a branch portion 57 extending horizontally from the base end of the lower arm 54 is provided, and a fixing hole is formed in the threaded hole vertically threaded in the branch portion 57. The bolt 58 is screwed in, and a knob 59 integrally formed at the lower end of the fixing bolt 58 is turned by hand so that the pad 60 at the upper end of the fixing bolt 58 is brought into contact with the lower surface of the table plate 56. Devices are known.

[0004]

However, since the pad 60 of the fixing bolt 58 comes into contact with the lower surface of the table plate 56 while rotating, the pad 60 is worn or the tape 60 is worn.
There is a problem that the lower surface of the bull plate 56 is rubbed and damaged. In addition, since the reaction of the force of the pad 60 pressing the lower surface of the table plate 56 is applied to the branch portion 57 as a force in the bending direction, a distortion occurs at the joint between the branch portion 57 and the lower arm 54.

Accordingly, an object of the present invention is to provide a fixing device for holding a table plate in cooperation with an upper arm, because the fixing device is worn,
An object of the present invention is to provide a baby chair that does not scratch or scratch the lower surface of the table board.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides an upper arm extending forward from a chair body having a seat portion, and a side surface substantially U-shaped from a middle portion of the upper arm. With a lower arm that extends in the shape of a letter, with the tip of the upper arm contacting the upper surface of the table board,
In a baby chair to be locked to the table board by contacting the distal end of the lower arm to the lower surface of the table board, a bolt engaging section is provided in the middle of the lower arm, and The fixing bolt whose length direction is the vertical direction is inserted so as to be vertically movable and is engaged so as not to rotate by the rotation stopping mechanism, and a nut with a knob that can be manually turned at a fixed position is screwed into the fixing bolt, By manually turning the nut with the knob, the fixing bolt moves up and down, and when the fixing bolt moves upward, the upper end contact portion of the fixing bolt does not rotate on the lower surface of the table plate. The table plate is held in contact with the upper arm and cooperates with the upper arm.

The bolt engaging portion is not particularly limited, but may be a bolt engaging cylindrical portion branched from a middle portion of the lower arm and standing upright.

The rotation stopping mechanism is not particularly limited, but may be an engagement mechanism between a non-circular portion provided on the fixing bolt and a non-circular hole provided on the bolt engaging portion. As a specific example of the engagement between the non-circular portion and the non-circular hole, an embodiment described later (FIG. 2)
Of a rectangular engaging piece and a rectangular cross-sectional hole of a bolt engaging cylindrical portion as shown in FIG. 3, and an irregular shape in which a part of the circumference is cut out by a substantially straight line as in a modified example (FIG. 3A) described later. Engagement with a bolt engagement cylinder having a circular cross section as well as a circular engagement piece can be mentioned. Further, another modification example described later (FIG. 3)
The key groove may be engaged with the key as in (b)).

The upper end contact portion is not particularly limited and may be the upper end surface of the fixing bolt itself, but a pad having a larger diameter than the fixing bolt attached to the upper end of the fixing bolt is preferable. Further, in order to increase the friction between the pad and the lower surface of the table plate to ensure the above-mentioned holding, it is preferable to form irregularities on the upper surface of the pad. The material of the pad is not particularly limited, but is preferably a material having a large friction with the lower surface of the table plate, for example, a soft resin or rubber.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a baby chair embodying the present invention will be described with reference to the drawings. As shown in FIG. 1, the baby chair 1 of the present embodiment is configured around a main frame 2 made of a metal pipe, and a rear half of the main frame 2 has a curved portion 3 that forms a part of a chair body.
The front half of the main frame 2 is a pair of upper arms 4 continuously extending forward from the curved portion 3.

A receiving member 8 made of cloth is attached to the curved portion 3. The receiving member 8 includes a bag portion 9 externally inserted into the curved portion 3, a back surface portion 10 and a side surface portion 11 extending downward from the bag portion 9, a seat surface portion 12, and a front edge center portion of the seat surface portion 12. And a crotch receiving portion 13 extending upward from the upper end of the bag portion 9. Have been. Accordingly, the chair main body 5 is constituted by the bending portion 3 and the receiving member 8, and the bending portion 3 and the back portion 10 particularly function as a backrest.

A cap 6 made of resin is fitted to the tip of the upper arm 4. A metal connection pipe 16 is rotatably inserted in the middle of the upper arm 4. Both ends of each connection pipe 16 are connected to a rear end face of the cap 6 and a regulating screw 7 screwed to the upper arm 4. The arm is restricted so as not to move in the arm axis direction. A lower arm 1 extending forward in a substantially laterally long U-shape at an intermediate portion of the connection pipe 16.
7 is welded, and a cap 18 made of resin is fitted to the tip of the lower arm 17. Therefore, the lower arm 1
7 can rotate with respect to the middle of the upper arm 4 together with the connecting pipe 16, and when not in use or when carried, both lower arms 1
7 can be turned and folded so as to fit between the upper arms 4 so that it does not become bulky in the height direction.

A fixing device 20 for holding the table plate 19 in cooperation with the upper arm 4 is provided at an intermediate portion of the lower arm. FIG. 2A shows the fixing device 20 before assembly, and FIG. 2B shows the fixing device 20 after assembly. The fixing device 20 is configured as follows. First, a bolt engaging cylinder portion 21 having a rectangular hole in cross section as a bolt engaging portion is vertically mounted at an intermediate portion of the lower arm 17. A fixing bolt 25 whose length is in the vertical direction is inserted through a rectangular hole in the cross section of the bolt engaging cylindrical portion 21 so as to be vertically movable, and as a non-circular portion provided at the lower end of the fixing bolt 25. The fixing bolt 25 is engaged so as not to rotate by the rotation stopping mechanism by the engagement of the square engaging piece 22 with the square hole of the bolt engaging cylinder 21. As a support for the fixing bolt 25, a cap 23 having a hole large enough to allow the fixing bolt 25 to be inserted smoothly and without looseness is attached to the upper end of the bolt engaging cylinder 21. A nut 26 with a knob 24 that can be manually turned at a fixed position on the cap 23 is screwed into a portion of the fixing bolt 25 that protrudes above the cap 23, and the nut 26 with the knob 24 is manually turned to fix the bolt for fixing. 25 moves up and down. A resin pad 27 is attached to the upper end of the fixing bolt 25 as an upper end contact portion having a larger diameter than the fixing bolt 25, and the upper surface of the pad 27 (the contact surface with the lower surface of the table plate 19) is attached to the pad 27. Unevenness for increasing friction is formed. As described above, when the fixing bolt 25 moves upward, the pad 27 of the fixing bolt 25 comes into contact with the lower surface of the table plate 19 without rotating, and cooperates with the upper arm 4 to clamp the table plate 19. It has become.

To use the baby chair 1 of the present invention,
The cap 6 at the distal end of the upper arm 4 is brought into contact with a portion near the upper edge of the table plate 19, and the cap 18 at the distal end of the lower arm 17 is brought into contact with a portion deeper than the lower edge of the table plate 19. By doing so, the table board 19 is locked. And, as described above, the knob 24
The nut 26 is manually turned to move the fixing bolt 25 upward, the pad 27 is brought into contact with the lower surface of the table plate 19 without rotation, and the nut 26 is further tightened. Thereby, even when the infant 28 moves violently, there is no possibility that the fixing device 20 is displaced.

Since the contact is made without rotation, there is no problem that the pad 27 of the fixing bolt 25 is worn or the lower surface of the table plate 19 is scratched and scratched. Further, if the nut 26 with the knob 24 is tightened, the fixing bolt 25 stops so as not to be loosened, so that it can be securely tightened. Further, the fixing device 20 includes the fixing bolt 2
Since the adjustment can be made in the vertical movement range of 5, the table board 19 having various thicknesses can be accommodated. Furthermore, in this fixing device 20, the reaction of the force of the pad 27 pressing the lower surface of the table plate 19 is applied to the bolt engaging cylinder 21 as a force in the compression direction,
Since the lower arm 17 is on the extension line, no distortion occurs at the joint between the lower arm 17 and the bolt engaging cylinder 21.

Note that the present invention is not limited to the configuration of the above-described embodiment, and may be embodied with appropriate modifications without departing from the spirit of the invention, for example, as follows. (1) Changing the shape and material of the fixing device. (2) As a rotation stopping mechanism of the fixing bolt 25, FIG.
As shown in (a), the engagement of the irregularly shaped engaging piece 22 having a part of the circumference cut out by one or a plurality of substantially straight lines and the bolt engaging cylindrical portion 21 having a similarly irregularly shaped circular hole. As shown in FIG. 3B, a key groove 29 provided on the engaging piece 22 (may be provided on the side surface of the fixing bolt 25).
And a key 30 provided inside the bolt engaging cylinder 21. Further, a key may be provided on the engagement piece and a key groove may be provided on the inner side of the bolt engagement cylinder to engage with the key.

[0017]

Since the baby chair of the present invention is constructed as described above, the fixing device for clamping the table plate in cooperation with the upper arm may be worn or scratched by the lower surface of the table plate. There is an excellent effect that there is no.

[Brief description of the drawings]

FIG. 1 is a side view of a baby chair according to an embodiment of the present invention.

2A and 2B show a fixing device of the baby chair, wherein FIG. 2A is a perspective view before assembling, and FIG. 2B is a perspective view after assembling.

FIGS. 3 (a) and 3 (b) are perspective views each showing a modification of a rotation stopping mechanism of a fixing bolt.

FIG. 4 is a side view of a conventional baby chair.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Baby chair 4 Upper arm 17 Lower arm 19 Table board 20 Fixing device 21 Bolt engaging cylinder part 22 Engaging piece 24 Knob 25 Fixing bolt 26 Nut 27 Pad 28 Infant

Claims (4)

[Claims] 1. An upper arm extending forward from a chair body having a seat surface portion, and a lower arm extending forward in a substantially U-shape from a middle portion of the upper arm, the distal end portion of the upper arm. To the top of the table board,
In a baby chair to be locked to a table board by contacting a distal end portion of a lower arm to a lower surface of a table board, a bolt engaging portion is provided at an intermediate portion of the lower arm, and a length is set with respect to the bolt engaging portion. A fixing bolt having a vertical direction is inserted so as to be vertically movable and is engaged so as not to rotate by a rotation stopping mechanism, and a screw nut which can be manually turned at a fixed position is screwed to the fixing bolt, and the knob is provided. By manually turning the nut, the fixing bolt is moved up and down, and when the fixing bolt is moved upward, the upper end contact portion of the fixing bolt comes into contact with the lower surface of the table plate without rotation. A baby chair characterized in that it cooperates with an upper arm to hold a table board. 2. The bolt engaging portion is a bolt engaging tubular portion that branches off from a middle portion of the lower arm and stands upright.
The described baby chair. 3. The baby chair according to claim 1, wherein the rotation stopping mechanism is an engagement mechanism between a non-circular portion provided on the fixing bolt and a non-circular hole provided on the bolt engaging portion. 4. The baby chair according to claim 1, wherein the upper end contact portion is a pad having a larger diameter than the fixing bolt attached to the upper end of the fixing bolt.