JPH06277132A - Jotting table supporting device - Google Patents

Abstract

PURPOSE:To use a jotting table which is arranged at the side of a seat by adjusting it to the body structure of a user, and retract the jotting table which is not used to a position which is out of the way. CONSTITUTION:A turnable arm 5 is arranged at the side part of a seat in such a manner that the turnable arm 5 can be turned from a using position P at which the upper edge part 53 of the turnable arm 5 becomes approx. horizontal to a storage position Q at which the upper edge part 53 becomes approx. vertical. A jotting table 7 is hinged by a hinge mechanism to the upper edge part 53 of the turnable arm 5, and the jotting table is made usable at the using position P by turning the jotting table to be approx. horizontal. Then, the hinge mechanism is constituted of a shaft 62 which is approx. parallel with the upper edge part 53 of the turnable arm 5, and a slidable pivotally connecting member 63b which is slidably fitted on the outer periphery of the shaft 62 in the shaft center direction, and the shaft 62 is held by the turnable arm 5, and the slidable pivotally connecting member 63b is fixed to the jotting table 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memo table supporting device mainly applied to a retractable (storable) theater chair or the like.

[0002]

2. Description of the Related Art Conventionally, as a memo pad supporting device of this type,
A rotating arm is pivotally attached to a side portion of the seat so as to be rotatable between a use position where the upper edge portion is substantially horizontal and a storage position where the upper edge portion is substantially vertical. It is known that a memo pad is hinged to the upper edge of the same in a state where it can only be rotated through a normal hinge or the like. Then, this one can be used by tilting the memo pad on an armrest or the like in the use position. Then, when not in use, the memo pad is once erected, and then the pivot arm is pivoted to the storage position so that the memo pad can be put away.

[0003]

However, if this is the case, the position of the memo pad in use is always constant. Therefore, a person with a large physique cannot avoid feeling cramped because the memo pad is too close to the body, while a person with a small physique is apt to cause a trouble that the memo pad is too far and difficult to use.

The first object of the present invention is to solve such a problem.

Further, in a retractable theater chair or the like in which the seat rises when not in use, a spring is provided in the hinge portion or the like so that the memo pad does not remain protruding forward in the storage position. There are not a few things that allow the memo table to automatically turn inward when retracted.
However, if the spring is provided, the number of parts is increased and the assembly is troublesome. Moreover, when the memo pad is once raised from the horizontal use position and put away, the memo pad must be lifted against the spring force, which requires a comparatively large operating force and is also rotated to the storage position. It is indispensable to hold the memo pad so that it will not rotate while moving it. Further, if it is used for a long period of time, the biasing force of the spring may decrease due to aging, and the memo pad may not perform the desired retracting operation.

A second object of the present invention is to allow a memo pad to perform a desired retracting operation without using a spring.

[0007]

The present invention takes the following means in order to achieve such an object.

That is, in the memo pad supporting apparatus according to the present invention, the rotating arm is provided on the side portion of the seat from the use position where the upper edge portion is substantially horizontal to the storage position where the upper edge portion is substantially vertical. The memo pad is hinged to the upper edge of the pivot arm via the hinge mechanism, and is used by tilting the memo pad substantially horizontally at the use position. It's something I got to get. The hinge mechanism includes a shaft that is substantially parallel to the upper edge of the rotating arm, and a sliding pivot member that is fitted on the outer periphery of the shaft so as to be rotatable and slidable in the axial direction. In addition to holding the shaft on one of the rotating arm and the memo pad,
Another feature is that a sliding pivot member is fixedly provided.

The memo pad is provided with a cam mechanism for converting the operation of lowering the memo pad due to gravity at the storage position into the rotational operation of the memo pad in order to cause the pivotal retracting operation without depending on the spring force. It is effective to configure so that the memo pad can be swung inward and retracted at the storage position.

In order to give a smooth initial turning motion to the cam mechanism, the shaft center of the shaft is tilted from the vertical direction to the seat side at the storage position, and the memo pad is placed by its own weight at the storage position. It is desirable to induce an inward turning motion.

[0011]

With such a structure, the shaft and the sliding pivot member, which are the components of the butterfly holding mechanism, can be relatively rotated, so that the rotating arm can be held in the use position. , The memo table with one attached can be rotated with respect to the rotating arm with the other attached, and as a result, the memo table can be tilted to a horizontal position and used by supporting it on an armrest or the like. become. In addition, when not in use, the memo base is once erected, and after that, the pivot arm is pivoted to the storage position, and then the memo base is pivoted again with respect to the pivot arm, so that the memo pad is moved inward. It is possible to retract it and fold it in front of the rising seat to store it. Furthermore, since the shaft and the sliding pivot member, which are the constituent elements of the butterfly holding mechanism, are relatively slidable in the axial direction of the shaft as well, the memo pad with one of them attached is
It is possible to slide the other side of the rotating arm in the axial direction of the shaft, and as a result, adjust the position of the memo pad in the use position in the front-back direction.

In addition, when a cam mechanism for converting the own weight of the memo pad into a rotational force is provided, the memo pad can be retracted inward by simply rotating the pivot arm to the storage position. Is triggered. Therefore, it is not necessary to incorporate a separate spring mechanism or the like into the butterfly holding mechanism.

Further, if the cam mechanism alone has a large resistance at the time of initial operation, if the shaft center of the shaft in the storage position is tilted to the seat side, the memo pad will be located directly below the tilted shaft shaft center. An attempt can be made to move the center of gravity to cause an initial rotation operation due to its own weight, and the operation can be smoothly linked to the operation of the cam mechanism.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

This memo pad support device is applied to a perch type chair A shown in FIG. 1, for example. In this chair A, a beam 1 is laterally laid on a floor F via legs (not shown), standing members 2 are fixed on the beam 1 at predetermined intervals, and a chair body is provided between the standing members 2. 3 is arranged. The chair body 3 includes a seat 31 whose rear end is rotatably supported by the beam 1 directly or via the standing member 2, and a backrest 32 arranged on the back surface of the seat 31. A lower end portion and an intermediate portion of the backrest 32 are respectively illustrated in a rear end portion of the seat 31 and a rear end portion of an armrest 4 (see FIG. 2) pivotally attached to an upper end of the upright member 2 about a horizontal axis m. Not connected via a connecting mechanism. When the seat 31 is rotated in the arrow X direction in FIG. 1 with the rear end as a fulcrum when not in use, the backrest 32 descends in the Y direction in the figure and the armrest 4 in the figure. The rearward tilting motion in the direction of arrow Z is caused in conjunction with this, and as a result, the armrest 4 can be retracted to the storage position when the seat is rising.

On the other hand, in the memo pad supporting device B, a pivot arm 5 pivotally mounted near the upper end of the upright member 2 and a hinge mechanism 6 for hingedly attaching the memo pad 7 to the pivot arm 5. It consists of

As shown in FIGS. 2 to 5, the pivot arm 5 has a face plate as a main part. A protrusion 51 is provided at the lower end edge of the face plate in the horizontal axis n direction, and the protrusion 51 is provided. A hole 52 is formed around the horizontal axis n. Then, a stepped bolt 54 is inserted into each of the hole 52 and the hole 21 provided in the vicinity of the upper end of the upright member 2, and a nut 55 is screwed to the tip of the stepped bolt 54 to erect the rotating arm 5. The member 2 is rotatably pivoted around a horizontal axis n near the upper end of the member 2. Then, this rotating arm 5
2 from the use position P where the upper edge 53 of the face plate is substantially horizontal to the storage position Q where the upper edge 53 is substantially vertical.
It is configured such that it can be rotated about the horizontal axis n during the period.

As shown in FIGS. 2 and 6, the butterfly holding mechanism 6 is composed of an intermediate bracket 61 for holding the shaft 62 and a rotating bracket 63 attached to the intermediate bracket 61. As shown in FIGS. 2 and 6 to 10, the intermediate bracket 61 is composed of a strip-shaped face plate as a whole, and a pair of shaft holding members 61a are provided at both ends of the upper edge so as to match the axis o. is doing. And
The face plate portion of the intermediate bracket 61 is arranged on the face plate portion of the rotating arm 5 in a superposed state, and the appropriate portion thereof is fastened to the fastener 61.
It is fastened to the rotating arm 5 via b. Shaft 62
6 has a collar portion 62a formed at the base end as shown in FIG. 6, and a tip 62b is inserted into both the shaft holding members 61a, and a C ring 62c is externally fitted to the tip 62b, so that the shaft 62 We are trying to prevent it from coming off. Rotating bracket 6
As shown in FIG. 2, FIG. 6, FIG. 7 and FIG. 11 to FIG. 3, 3 is a face plate as a whole, and a part of the face plate is bent in two steps via a step part 63a. A tubular sliding pivot member 63b is fixedly provided at the center of the longitudinal direction of 63a.
Then, the sliding connecting member 63b is disposed between the shaft holding members 61a of the intermediate bracket 61 with the axes o aligned with each other, and in this state, the shaft 62 is inserted between the shaft holding members 61a, Sliding pivot member 6
3b is fixed to the rotation bracket 63 and the shaft 62
Is rotatable about the axis o with respect to the intermediate bracket 61 (see imaginary line in FIG. 7), and the rotating bracket 63 is slidable relative to the intermediate bracket 61 in the axis o direction ( (Refer to the imaginary line in FIG. 6).

Then, as shown in FIG. 2, the memo pad 7 is attached to the upper surface 63c of the rotating bracket 63 in a state where the used end S side is projected, and the lower surface 6 of the rotating bracket 63 is attached.
The tip of the countersunk screw 63e inserted from the 3d side is fixed to the lower surface 7a of the memo pad 7.

[0020] Incidentally, as shown in FIG. 6, wherein the note bed suitable terminal S side of the sliding pivot connection member 63b slope 63b ₁ is formed, also, one end of the cylindrical portion 61a of opposing the slope 63b ₁ Is formed with a slope 61a ₁ at the same angle but with a phase shifted in the circumferential direction by 90 °, and both slopes form the cam mechanism 8 of the present invention. Then, after the pivot arm pivots to the storage position Q shown in FIGS. 2 and 15, the operation of lowering the memo pad 7 by gravity is converted into the rotational movement of the memo pad 7 by the cam mechanism 8. There is. That is, the inclined surface 63b ₁ of the sliding pivot member 63b is initially in contact with the shaft holding member 61a in a state of being 90 ° out of phase in the circumferential direction as shown in FIG. When the load of the memo pad 7 acts on the sliding pivot member 63b in this state, the contact portion tries to move in a more stable direction, and FIG. 16 → FIG. 17 → FIG.
As shown in FIG. 8, the lower end of the slope 63b ₁ slides down in the slope 61a _{1 along an} arc. At this time, the sliding pivotal member 63b is caused to perform the operation shown by an arrow D in the figure, which is both rotating and descending. Then, at the position shown in FIG.
a _1, 63 b ₁ each other is the most stable state by abutment, stops the operation of the Suridokururuyui member 63 b. Then, at this position, the memo pad 7 held by the rotating bracket 63 is held in a state of being retracted inward as shown by an imaginary line in FIG.

In this case, the cam mechanism 8 alone has a large resistance at the time of initial operation, and there is a possibility that the inward turning operation may not be started promptly. Therefore, in the present embodiment, as shown in FIGS. 2, 6, 15, and 19, when the intermediate bracket 61 is connected to the rotating arm 5 by using the fastener 61b, the memo pad use end S is used. Fastener 61 on the side far from the
A spacer 9 having an appropriate thickness is interposed between the intermediate bracket 61 corresponding to b and the face plate portion of the rotating arm 5. Then, when the rotating arm 5 reaches the storage position Q shown in FIG. 15, the axis o of the shaft 62 is moved toward the seat 3 side by about 1.5 ° with respect to the vertical axis Z as shown in FIG. I try to keep it leaning. Generally, a mass body that is attached to the tilt axis and has a center of gravity that is offset from the tilt axis always moves the center of gravity to a position directly below the tilt axis and hangs on the tilt axis at that position to try to stabilize. . In the case of this embodiment, when the rotating arm 5 is moved to the storage position Q shown in FIG. 15, the center of gravity of the memo pad 7 is rotated by 90 ° from the position M ₀ just below the axis o of the tilted shaft 62. Therefore, the memo pad 7 has the center of gravity after that, and the memo pad 7 is shown in FIGS.
An attempt is made to move to the stable point M ₀ when the position shown by the imaginary line in FIG. 9 is reached, and an inward turning motion is promptly induced.

With the above-described structure, the memo pad 7 can be rotated relative to the rotary arm 5 via the hinge mechanism 6. Therefore, the rotating arm 5 is lifted to the use position P shown in FIG. 2, and then the memo pad 7 is tilted to the horizontal position in the direction of arrow E in FIG.
It becomes possible to use it by supporting it on the armrest 4.
Further, when not in use, the memo pad 7 is erected in the direction opposite to the arrow E, and after that, the pivot arm 5 is pivoted to the storage position Q shown in FIG. On the other hand, by rotating in the direction of arrow G in FIG. 1, the memo pad 7 can be retracted inward, and can be folded and stored on the front surface of the raised seat 31. Further, the memo pad 7 is attached to the rotating arm 5 via the butterfly holding mechanism 6.
Since it is also slidable in the direction of the axis o, the memo pad 7 is slid in the direction of the axis o of the shaft 62 as shown in FIG. It becomes possible to adjust in the direction. Furthermore, by merely moving the rotating arm 5 to the storage position Q, the cam mechanism 8
Also, due to the cooperative action of the tilted shaft axis o, the inward rotation / withdrawal operation of the memo pad 7 is automatically and smoothly caused. Therefore, it is not necessary to incorporate another spring mechanism or the like into the butterfly holding mechanism 6.

Therefore, according to the memo pad supporting apparatus of the present embodiment, it is possible to realize the usage pattern according to the physique while adjusting the position of the memo pad 7 back and forth during use, and do not project to the front of the seat during storage. It can be stored compactly. Therefore, it is possible to significantly improve the usability of the memo pad 7 as compared with the conventional one. In addition, since the spring mechanism is not required, the number of parts and the number of assembling steps can be reduced, and the memo table 7 can be lifted with a relatively small operating force when standing up from the horizontal position and put away, and the arm 5 is stored. It is possible to eliminate the inconvenience of performing the storing operation while holding the memo pad 7 so as not to rotate even during the rotation to the position Q. Further, the problem of malfunction due to the aged deterioration of the spring will be solved.

The specific structure of each part is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the shaft 62 is held on the rotating arm 5 side and the sliding pivoting member 63b is fixed on the memo pad 7 side, but the sliding pivoting member is fixed on the turning arm side, The shaft may be held on the memo pad side.

[0025]

Since the memo pad supporting device of the present invention has the above-described structure, the memo pad can be used according to the physique at the time of use, and is compact on the front surface of the seat that has been raised by the retracting operation at the time of storage. Can be stored in. Therefore, the usability of the memo pad is effectively improved as compared with the conventional one. In addition, when a cam mechanism is provided, the memo pad can be retracted by its own weight without relying on springs, which improves the operability when the memo pad is taken in and out, and makes it easier to use. The effect of further improving is obtained. Further, when the shaft center of the shaft in the storage position is tilted to the seat side, an effect of smoothly causing the initial rotation operation of the cam mechanism is exhibited.

[Brief description of drawings]

FIG. 1 is a perspective view of a chair to which an embodiment of the present invention is applied.

FIG. 2 is an exploded perspective view of the same embodiment.

FIG. 3 is a plan view showing a rotating arm of the embodiment.

FIG. 4 is a front view of the same.

FIG. 5 is a right side view of the same.

FIG. 6 is a plan view showing a hinge mechanism of the embodiment.

7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is a plan view showing an intermediate bracket of the same embodiment.

FIG. 9 is a front view of the same.

FIG. 10 is a right side view of the same.

FIG. 11 is a plan view showing a rotating bracket of the embodiment.

FIG. 12 is a front view of the same.

FIG. 13 is a right side view of the same.

FIG. 14 is a perspective view showing a state in which the memo pad slides in a use position in the embodiment.

FIG. 15 is a perspective view showing a state in which the memo pad rotates in the storage position in the embodiment.

FIG. 16 is an operation explanatory view showing the manner in which the memo pad rotates by the cam mechanism in the embodiment.

FIG. 17 is an operation explanatory view showing the manner in which the memo pad rotates by the cam mechanism in the embodiment.

FIG. 18 is an operation explanatory view showing the manner in which the memo pad rotates by the cam mechanism in the embodiment.

FIG. 19 is a partially omitted XIX direction arrow view in FIG. 15;

[Explanation of symbols]

 o ... Shaft axis P ... Use position Q ... Storage position 5 ... Rotating arm 6 ... Butterfly holding mechanism 7 ... Memo stand 8 ... Cam mechanism 31 ... Seat 53 ... Upper edge 62 ... Shaft 63b ... Sliding pivot member

Claims (3)

[Claims] 1. A rotating arm is provided on a side portion of a seat so as to be rotatable between a use position where the upper edge portion is substantially horizontal and a storage position where the upper edge portion is substantially vertical. A memo pad supporting device in which a memo pad is hinged to an upper edge portion of the rotating arm via a hinge mechanism so that the memo pad can be tilted substantially horizontally in the use position. The hinge mechanism includes a shaft that is substantially parallel to the upper edge of the rotating arm, and a sliding pivot member that is fitted on the outer periphery of the shaft so as to be rotatable and slidable in the axial direction. The memo pad supporting device, wherein the shaft is held by one of the rotating arm and the memo pad, and a sliding pivot member is fixedly provided on the other. 2. A cam mechanism for converting an operation of lowering the memo pad due to gravity at a storage position into a rotating operation of the memo pad, so that the memo pad can be rotated and retracted inward at the storage position. The memo pad supporting device according to claim 1, wherein the memo pad supporting device is provided. 3. In the storage position, the shaft center of the shaft is tilted from the vertical direction to the seat side, and the memo pad is caused to rotate inward by its own weight in the storage position. The memo pad support device according to claim 2, wherein: