JP4924965B2 - Child chair structure - Google Patents

Description

  The present invention relates to a chair, particularly a chair used in a child facility such as a kindergarten or a nursery school.

Those shown in FIG. 6, 7 are known as height adjustable child chair conventionally.

  This is a channel 2 'made of a thin plate having a U-shaped cross section on the upper surface of the floor contact bar 1', and a lifting leg 3 'made of a thin plate having a funnel shape in side view is attached to the outside of the frame 7' for the seat plate. A protruding strip 3 "is formed by protruding the central longitudinal direction of the elevating leg 3 'in a U-shaped cross section, and a plurality of height adjustment holes 4', 4 ', 4' ... are stepped on the protruding strip 3". The protrusion 3 "is externally fitted to the channel 2 'so that it can be moved up and down, the two height adjustment holes and the screws 4a' screwed in the channel 2 'are appropriately matched, and the bolt 5' is tightened.

  In this conventional example, since the channel 2 'is erected on the upper surface of the flooring bar 1', a plurality of chairs of the same type cannot be stacked. For this reason, a large area is required for storage in a children's facility, and both the channel 2 'and the lifting leg 3' are thin steel plates that are not very robust, so that the protrusions 3 "are projected or the whole is funnel-shaped, etc. The structure becomes complicated, and there is a problem in terms of robustness.

The present invention eliminates the waste of providing various types of chairs of different sizes for children ranging from 2 to 6 years old, and allows the chair legs to be freely adjusted so that only one type is sufficient. Despite being adjustable in height, multiple chairs can be stacked, which saves space, saves space, and provides more robust children's chairs. The task is to do. It is another object of the present invention to quickly fix a chair leg to a predetermined height position by a simple operation of simply screwing one screw.

In the present invention, a hollow support leg is erected on each inner side of a pair of floor contact bars spaced in parallel with each other in parallel, and a lifting support leg is inserted into the hollow support leg so as to be movable up and down, and a plurality of height adjustment holes are provided in the lifting support leg. The lifting support legs are fixed to the hollow support legs via fixing screws in desired holes of the height adjustment holes, the seat plate frame is fixed inside each of the lifting support legs , and the floor contact bar, The hollow support legs and the elevating support legs are steel pipes having an oval cross section, the lower end portion of the outward flat surface of the hollow support legs is welded to the inward plane of each floor contact bar, the hollow support legs are erected vertically, A height adjustment hole is drilled on the rear side of the lifting support leg, a fixing screw insertion hole is drilled on the upper rear side of the hollow support leg, and a nut communicating with the insertion hole is fixed to the hollow support leg, and the rear part of the stepped pin The remaining small diameter of the fixing screw with a screw installed in the large diameter part Said nut, screwed to the external thread on the nut as well as through the insertion hole and the desired hole, and is characterized in that presses and fixes the lifting support legs to the hollow support leg in the fixing screw .

The present invention eliminates the waste of providing various types of chairs of different sizes for children ranging from 2 to 6 years old, and allows the chair legs to be freely adjusted so that only one type is sufficient. In addition, since a hollow support leg is erected on the inner side of the floor contact bar and a seat frame is fixed on the inner side of the lifting support leg, a plurality of chairs can be stacked. As a result, a large storage space is not required. It can save space, and can provide a rugged children's chair. Furthermore , the chair leg can be quickly fixed at a predetermined height position by a simple operation of simply screwing one screw.

The Figures 1-5 illustrating the shape condition of the present invention.

  A pair of flooring bars 1 and 1 made of steel pipe and having an oval cross section are provided with a pair of projecting surfaces 10 and 10 'on the upper and lower sides and spaced apart in parallel in the left and right direction. Made of a steel pipe, and with the arcuate surfaces 20 and 20 'of the hollow support legs 2 having an oval cross section, the lower end of the outward face 21 of the hollow support legs 2 is welded to the inward face 11 of each floor contact bar 1, The hollow support leg 2 is erected vertically.

  A boss 90 is welded to the upper part of the rear projecting surface 20 ′ of each hollow support leg 2, and as shown in FIG. 3, a female screw hole 91 is screwed into the boss 90 to form a nut 9. The insertion hole 8 of the fixing screw 5 corresponding to the screw hole 91 is drilled.

  The elevating support legs 3 are formed of steel pipes having a cross-sectional oval shape with a diameter smaller than that of the hollow support legs 2, and the elevating support legs 3 are inserted into the hollow support legs 2 so as to be movable up and down.

  A plurality of (six in this example) height adjustment holes 4, 4, 4... Through which the fixing screws 5 are inserted are formed in stages on the rear projecting arc surface 30 of each lifting support leg 3.

  As shown in FIG. 1, a back plate frame 70 having a U-shape in front view that tilts backward as one steel pipe having a circular cross section goes upward is bent, and both lower portions of the back plate frame 70 are bent forward. Then, a pair of left and right seat plate frames 7 and 7 are projected horizontally.

  The ends of the reinforcing beams 24 formed by welding the outward side of the frame 7 for each seat plate to the upper inward surface 31 of each lifting support leg 3 and the steel pipes having an oval cross section on the lower inward face of the pair of hollow support legs 2 and 2 Weld.

  The fixing screw 5 in which a screw 52 is screwed to the rear end large-diameter portion 51 of the stepped pin 50 shown in FIG. 3, specifically, the remaining small-diameter portion 53 of the blade tip screw, the female screw hole 91, the insertion hole 8, and the height Of the adjusting holes 4, 4, 4,..., Penetrates through the desired hole 4a at a desired height, and the external thread 52 is screwed into the female threaded hole 91 with a well-known L-shaped tool C, and the tip of the blade tip screw is used. The elevating support leg 3 is strongly pressed and fixed to the hollow inner surface 25 of the hollow support leg 2.

  In order to adjust the height of the chair leg according to the present invention, it goes without saying that the lifting support leg 3 may be lifted up and down as desired and the pressing operation with the fixing screw 5 is performed. Reference numerals 71, 31, 26, 12, and 12 ′ in the figure are plastic caps that close the respective opening ends of the respective seat frame 7, the lifting support legs 3, the hollow support legs 2, and the floor contact bar 1. 12 'is protruded slightly below the flooring bar 1.

  A plastic ring 27 is fitted into the upper end opening of the hollow support leg 2. Furthermore, reference numeral 13 in the figure is a small piece made of plastic that enables the flooring bar 1 to be placed horizontally when the chairs of the present invention to be described later are stacked. It is a visual observation that they could be stacked.

The seat plate 6, 6 to the seat plate frame 7, 7 And, also the chair to fix the backrest plate 73, 73 on the back frame 70, 70.

  Since the height adjustment of the chair legs is as described above, the stacked state of the chairs made according to the present invention will be described next. As shown in FIGS. Rather than projecting upward, each hollow support leg 2 is erected on the inner side of each floor contact bar 1, and the seat plate frame is fixed on the inner side of the lifting support leg. The second floor floor bar 1 is placed on the floor floor bar 1 at the position, and the third floor floor bar 1 is placed thereon (specifically, in this embodiment, the cap 12 'and the small piece 13 are the lower floor). Can be placed on the floor contact bar 1).

It is a perspective view of the state which made the 1st form of this invention into the lowest position. It is a perspective view of the state made into the uppermost position in the same as the above. It is an AA expanded end elevation. It is a perspective view in the state where a plurality of the same chairs were stacked. It is a side view same as the above. It is a perspective view of a prior art example. It is a BB expanded sectional view.

DESCRIPTION OF SYMBOLS 1 Floor-contacting bar 2 Hollow support leg 3 Elevating support leg 4 Height adjustment hole 4a Desired hole 5 Fixing screw 6 Seat plate 7 Seat plate frame 8 Insertion hole 9 Nut 50 Stepped pin 51 Rear large diameter portion 52 Male screw 53 Remaining small diameter portion 70 Backboard frame

Claims (1)

A hollow support leg is erected on each inner side of a pair of floor contact bars spaced in parallel to the left and right, and a lifting support leg is inserted into the hollow support leg so as to be movable up and down, and a plurality of height adjustment holes are provided in the lifting support leg in stages. The elevating support legs are fixed to the hollow support legs through fixing screws in desired holes of the height adjustment holes, and the seat plate frames are fixed to the inner sides of the elevating support legs , and the floor contact bar and the hollow support legs The elevating support legs are steel pipes having an oval cross section, the lower end portions of the outer flat surfaces of the hollow support legs are welded to the inward planes of the floor contact bars, the hollow support legs are vertically erected, and the height adjustment holes On the rear side of the lifting support leg, an insertion hole for a fixing screw is formed on the upper rear side of the hollow support leg, a nut communicating with the insertion hole is fixed to the hollow support leg, and the rear large diameter part of the stepped pin The remaining small-diameter portion of the fixing screw to which the male screw is screwed is Tsu DOO, the insertion hole and the desired bore with penetrating screwing the external thread on the nut, a children's chair said elevating support legs in the fixing screw, characterized in that presses and fixes the hollow support legs structure body.

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