JP3268724B2 - Armrest storage memo table device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memo table device for an armchair.

[0002]

2. Description of the Related Art A memo table device for pulling out or storing a memo table from a front opening accommodating chamber provided in an armrest of a chair generally employs a rotating system as disclosed in Japanese Patent Application No. 7-251885. In the above device, a support frame for supporting the memo table so as to be able to fall down is rotatably pivotally attached to a tip of a base plate which protrudes and retracts in the storage chamber, and the memo table and the support frame are vertically rotated while being pulled out forward by armrests. Is set, and in the case of storage, the reverse operation is performed. Since the memo table is generally rectangular, the rotation trajectory of the tip of the memo table largely protrudes on the front passage.

[0003]

SUMMARY OF THE INVENTION According to the present invention, the trajectory of the tip of the memo table is prevented from protruding forward without reducing the area of the memo table, and the memo table is automatically moved without using an external biasing force such as a spring. It is intended to provide a device that can be stored. It is another object of the present invention to provide a memo table device in which the memo table rotation axis when the memo table is used is positioned above the armrest portion to reduce the step between the memo table surface and the armrest surface to improve the usability.

[0004]

SUMMARY OF THE INVENTION A memo table apparatus according to the present invention has a pair of leg pieces at an upper portion of an opening side of a memo table accommodating chamber provided in an armrest of a chair and having a front opening. A bifurcated holding body having a circular through groove and a squeezing portion is fixedly provided, has a base having an oval cross section that passes through the squeezing portion and engages with the circular groove, and rotates integrally with the memo table. A rotating shaft, a support plate that supports the rotating shaft along the upper side, and one end pivotally attached to both sides of substantially the center of the support plate, and the other end pivotally attached to the inner wall machine frame of the storage chamber. A pair of first links, a second link having a distal end pivotally mounted on the base end side of the support plate, a relief groove formed on the base end side, and a guide roller protruding from the base end. A fixing pin that fits into the escape groove is implanted, and a horseshoe-shaped guide groove into which the guide roller is fitted is provided. Constructed and a vertical up plate was. In addition, a leaf spring is bent upright in a recess provided in an upper side portion of the support plate, and an upper end of the leaf spring is engaged with an engagement recess provided on a side surface of the memo table rotation shaft. It is provided with.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, 1 is an armrest chair, 2 is a backrest, 3 is an armrest, 4 is a seat, and 5 is a front opening memo table storage room provided in the armrest portion. As shown in FIG. 2 and subsequent figures, the memo table storage chamber 5 stores the entire memo table and the support mechanism, and is provided with a two-piece aluminum die-casting holding member 7 above the front opening 6 in the room. The bifurcated body 7 includes a pair of leg pieces 11 and 1.
2 is a block body having a cross-sectional bifurcated shape in which a keyhole-shaped circular through groove 13 is formed in the fork part. 14 is a pinching part, 1
Reference numeral 5 denotes a guide taper portion of the inner wall of the leg, and the outer surface 16 of the block body is fixed to the upper portion of the storage room entrance side in close contact with the storage room wall machine frames 5a and 5b. Reference numeral 17 denotes a connecting portion. 2
Reference numeral 0 denotes a memo table support plate which supports the rotating shaft 31 of the memo table mounting plate 30 a along the upper side 21 via a bearing member 32. 31a is an insertion pin shaft. The memo stand 30 is integral with the mounting plate 30a. In the figure, the support plate 20 is made of a thick plate, but may have a T-shaped or I-shaped cross section for weight reduction. The base end portion 33 of the rotation shaft is formed in an oval cross section, and the flat portion 34 facing it can pass through the squeezing portion 14 of the holding body 7 together with the upper side portion 21 of the support plate. 35 is an arc part. The exposed portion on the distal end side of the support plate 20 is covered by a boat bottom-shaped plastic cover 29 formed by blow molding or the like. Reference numeral 23 denotes a pair of first links, each of which has one end pivotally attached to the fixing pins 8a, 8b of the inner wall machine frames 5a, 5b, and the other end pivotally attached to substantially the center of the support plate 20.
Reference numeral 25 denotes a second link, which is disposed substantially parallel to the first link 23, has a distal end pivotally mounted 25a on the base side of the support plate 20, has an escape groove 26 on the proximal end side, and has a guide roller on the proximal end. 27 are protruded. Numeral 40 denotes a hanging plate which is hung from the upper part of the accommodation chamber. A fixing pin 41 is implanted into the hanging plate and fitted into the escape groove 26 of the link.
2, and the guide roller 27 is fitted therein. The shape of the guide groove 42 is formed along the rotation locus of the guide roller 27, and both ends 42a and 42b function as stoppers when the memo table is stopped. FIGS. 10 to 12 are partial cross-sectional views showing the operation of a positioning lock mechanism for ensuring the operation of lifting the memo table. The leaf spring 37 stands upright in the recess 36 on the upper side of the support plate and the tip thereof. And an engaging recess 39 in which the pressing element is provided on the rotation shaft side surface.
To keep the memo table in a horizontal state and a vertical state. The portions of the recess 36 and the recess 39 can be set arbitrarily.

[0006]

In the stored state, the memo table 30 hangs down together with the support plate 20 by its own weight as shown in FIG. In this state, since the guide pin 27 at the base end of the second link is in contact with the end 42b of the guide groove 42, it is stable. When the memo stand 30 is picked up and pulled out, the first link 23 is opened.
Only rotates, but the second link 25 lifts up the memo table while performing complicated movements as shown in FIGS. 3 and 4 by the escape groove 26 and the guide groove 42. In this case, in the device of the present invention, the supporting plate itself is not provided with
Since the memo table support plate is lifted up by the action of the link, the corner portion on the tip side of the memo table does not protrude significantly on the road ahead. Support plate 20 and memo table rotating shaft 31
As the horizontal direction becomes as shown in FIG. 5, the rotating shaft base 33 rises from the position of FIG. 7 to the position of FIG. 8 through the squeezing portion 14 inside the holding body 7 and is fitted into the circular groove 13. When the memo table 30 is folded down in this state, as shown in FIG. 9, the circular arc portion 35 of the rotation shaft base comes into contact with the left and right arc surfaces of the circular groove 13 and is prevented from dropping out of the pinching portion 14 and the memo table is used. Supported as possible. When the memo table is in a horizontal state, it may be supported by an auxiliary receiving member (not shown) or the like. When the user leaves the seat or lifts the memo table up during an emergency evacuation, the memo table 30 is brought into the vertical state in FIG. 5 and at the same time, the base 33 of the rotating shaft is in the state shown in FIG. It is lowered as well as the plate 20 and stored as shown in FIG. 2 through the state of FIGS.

[0007]

According to the memo table apparatus of the present invention, the memo table support plate is moved up and down together with the rotation by the pseudo parallel link mechanism provided in the accommodation room instead of rotating the memo table by a simple pivot. There is an advantage that the trajectory does not protrude outward as in the related art, and this makes it possible to increase the number of installed chairs. In addition, the above-described motion allows the end of the memo table rotating shaft to be inserted into the holding body circular groove substantially in parallel with the groove from below, so that the rotation shaft stops at the top of the storage chamber. Since it is easy to position the memo table, the memo table surface can be made substantially the same as the armrest surface, and a convenient memo table can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a chair provided with an armrest storage memo stand.

FIG. 2 is a side view showing the inside of the storage chamber in a memo table storage state.

FIG. 3 is a side view of the memo table at the start of rotation.

FIG. 4 is a side view showing a state where the memo table is further rotated.

FIG. 5 is a partially longitudinal side view of the memo stand in an upright state.

FIG. 6 is a cross-sectional plan view showing a support mechanism of the memo table support plate.

FIG. 7 is a longitudinal sectional front view of the memo table holding mechanism in a stored state.

8 is a vertical sectional front view of the memo table holding mechanism in the state of FIG. 5;

9 is a vertical sectional front view of the memo table holding mechanism when the memo table is laid down in the state of FIG. 5;

FIG. 10 is a vertical cross-sectional view of a tumbling lock mechanism of the memo table;

FIG. 11 is a vertical cross-sectional view of a memo table falling / rotating lock mechanism.

FIG. 12 is a vertical cross-sectional view of a memo table falling / rotating lock mechanism.

[Explanation of symbols]

 5 Storage Room 5a, 5b Machine Frame Inner Wall 6 Front Opening 7 2 Holder 8a, 8b Fixing Pin 11, 12 Leg Piece 13 Circular Groove 14 Clamping Part 15 Tapered Part 20 Support Plate 21 Upper Side 23 First Link 24 Pivot Part 25 Second link 26 Escape groove 27 Guide pin 29 Cover 30 Note table 31 Rotating shaft 32 Bearing member 33 Oval cross section base 34 Flat part 35 Arc part 37 Plate spring 38 Presser 40 Hanging plate 41 Fixing pin 42 Guide groove

Claims (2)

(57) [Claims] 1. A keyhole-shaped circular through groove and a squeezing portion are formed in an armrest of a chair. A bifurcated body fixedly provided, having a base portion having an oval cross section that passes through the clamping portion and engages with the circular groove, and a pivot shaft that pivots integrally with the memo table; A pair of first links, one end of each of which is pivotally attached to both sides of substantially the central portion of the support plate and the other end of which is pivotally attached to the inner wall machine frame of the storage chamber,
A second link having a distal end pivotally attached to the base end side of the support plate, an escape groove formed in the base end side, and a guide roller protruding from the base end; and a fixing pin fitted into the escape groove. And a hanging plate provided with a horseshoe-shaped guide groove into which the guide roller is fitted, and a hanging plate hanging down from the upper part of the housing room. 2. A memo stand in which a leaf spring is bent upright in a recess provided in an upper side portion of the support plate, and an upper end of the leaf spring is engaged with an engaging recess provided on a side surface of the memo table rotation shaft. The memo table device according to claim 1, further comprising a lodging lock mechanism.