JPH08280479A - Memo base supporting device - Google Patents

Abstract

PURPOSE: To directly spring up a memo base from a horizontal using position to an oblique front side part by controlling rotation force in back and forth directions to be converted to the advancing and retreating operations of art operation shaft and setting a control range. CONSTITUTION: The operation shaft 12 is elastically pressed to a rear side by the repulsive force of a spring 25, the pin 24 of an operation range control means 15 is stably held at the crossing part of the peripheral direction part 23b and the inclined part 23c of a transparent window 22 and the memo base 17 maintains the horizontal using position. When a seated person pressurizes the memo base 17 to a front si.de, a rotating body 13 advances the operation shaft 12 and rotates it to the front side while opposing to the pressing force of the spring 25. At the time, since the pin 24 is guided to the inclined part 23c of the transparent window 22 accompanying the advance of the operation shaft 12, the rotation force is applied to the operation shaft 12. Thus, even when lifting force is not sufficiently applied to the memo base 17, the memo base 17 is spring up almost to a spring-up position. The memo base 17 can be directly sprung up from the horizontal using position to the oblique front side part and the seated person can immediately stand up and leave from a chair.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a memo pad support device suitable for use in chairs in theaters and conference halls.

[0002]

2. Description of the Related Art Conventionally, as a memo pad supporting device of this type,
A support fixed to one side of the chair, a front-rear rotating body pivotally attached to the support so as to be rotatable back and forth, and a left and right pivotally attached to the front-rear rotating body so as to be rotatable left and right. It is known that the rotating table is provided, and the memo table mounted on the left and right rotating body can be operated between a horizontal use position and a storage position that hangs down to one side of the chair. . That is, this one rotates the memo pad vertically from the horizontal use position to the upright position together with the left and right rotating body, and thereafter rotates the memo base together with the left and right rotating body and the front and rear rotating body in the front-rear direction. It is designed to be stored in the storage position.

[0003]

However, in the conventional device, the front-rear rotating body is supported with respect to the support body only after the left-right rotating body is rotated in the left-right direction to once rotate the memo pad to the standing position. It is generally designed so that it cannot be rotated. Therefore, when an emergency such as an earthquake is encountered and an emergency evacuation is attempted, it may not be possible to take the two-step operation described above. Therefore, a problem arises that the memo pad interferes and delays evacuation.

Further, in such a structure, after the seated person leaves, the memo pad may remain as it is in the upright position, which unnecessarily narrows the passage formed in front of the chair. Is also likely to occur. The present invention aims to solve such a problem.

[0005]

In order to achieve such an object, the present invention converts the forward / backward rotational movement of the rotating body into the forward / backward movement of the operating shaft by the movement converting means, and supports it by the operating range regulating means. By restricting the rotation and forward / backward movement of the operating shaft with respect to the body, the operating range of the memo pad is limited, and the turning force in the front-rear direction acting on the turning body is controlled by the turning force control means. , It is possible to directly flip up a memo pad in a substantially horizontal use position diagonally to the front and side.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION A memo pad supporting device according to the present invention is
A support disposed on one side of the chair, an operating shaft that is supported by the support so as to be able to advance and retreat in a substantially front-back direction and rotatably around an axis, and a substantially front-back direction at a front end portion of the operating shaft. A rotary body that is pivotally mounted on the rotary shaft and that also rotates substantially in the left-right direction in accordance with the rotation of the operating shaft; and a motion conversion that converts the forward and backward rotary motion of the rotary body into the forward / backward motion of the operating shaft. Means, and operating range restricting means for restricting the operating range of the memo pad by restricting the rotation and forward / backward movement of the operating shaft with respect to the support,
And a turning force control means for controlling a turning force in the front-rear direction acting on the rotating body, wherein the memo pad mounted on the rotating body is directly slanted forward from at least a substantially horizontal use position. It is characterized in that the regulation range by the operating range regulation means is set so as to be able to jump up.

As a preferable mode of the motion converting means, a cam surface is formed on the outer edge of the base end portion of the rotating body, and the cam surface is brought into sliding contact with the front end surface of the support body.
The support may be, for example, a member having an inner peripheral surface that encloses the actuation shaft. In that case, the operating range restricting means includes a transparent window formed on the inner peripheral surface of the support, and a pin radially protruding from the outer periphery of the operating shaft so as to be in sliding contact with the opening edge of the transparent window. It can be

The turning force control means may be constituted by, for example, a spring which is provided to bias the actuating shaft in the axial direction and which controls the turning force in the front-rear direction acting on the rotating body in cooperation with the motion converting means. Good. In order to reliably prevent the memo pad that has bounced up to the side from remaining at the standing position with a simple configuration, for example, the front end surface of the support may be brought into contact with the cam surface when the memo pad stands. A guide for tilting the memo pad forward by providing a projection for tilting the memo pad forward or guiding the pin of the operating shaft at the opening edge of the window of the support immediately before the memo pad stands up. It is good to have a section.

In order to give a certain sense of stability to the operation,
It is desirable that the shape of the window is groove-shaped, or that the front end surface of the support body is constituted by a sliding member for smoothing the rotation of the sliding cam surface. When a flat surface for pivotally attaching the rotating body is formed at the front end of the actuating shaft, the flat surface and the peripheral surface of the support body rotate in conjunction with the actuating shaft and the forward / backward movement of the actuating shaft. Regardless of this, it is effective to always provide a supplementary member that is arranged so as not to be able to move back and forth and that forms a front end face of the support together with the sliding member at a position substantially continuous with the sliding member.

In order to stabilize the state of use, it is preferable to provide a stopper at a position where the operating shaft tends to rotate due to the weight of the memo pad in the used position and the rotation is prohibited. With the structure described above, the rotating body equipped with the memo pad can be rotated back and forth with respect to the operating shaft, and can also be rotated in the left-right direction along with the rotation of the operating shaft. Therefore, the memo pad can be operated three-dimensionally. That is,
The memo pad is swung to the left and right from a substantially horizontal use position located in front of the seated position and flipped up to one side, and swung forward and backward to be stored in a space below the armrest in a suspended state. It also becomes possible. Moreover, since the left and right rotations and the front and rear rotations of the rotating body are simultaneously performed so that the memo pad can be directly flipped up from the position of use to the diagonally front side, the seated person can hold his / her hands or legs. As a result, it is possible to jump up the memo pad diagonally forward and immediately stand up.

Moreover, since the movement of the memo pad in the front-back direction is converted into the forward / backward movement of the working shaft by the motion converting means, the three-dimensional movement of the memo pad is moved forward / backward with respect to the support of the working shaft. It can be converted into only movement and rotation movement. Therefore, the three-dimensional operation range of the memo pad can be definitely determined only by providing one kind of operation range control means between the operation shaft and the support. Therefore, for example, after the memo pad is flipped up diagonally to the front side and then the memo pad is rotated by its own weight while keeping its posture and guiding the memo pad so that the memo pad fits in the storage position. It is possible to easily perform the setting.

Further, since the turning force in the front-rear direction acting on the rotating body can be controlled by the turning force control means, the speed of falling of the memo pad mounted on the rotating body can be controlled and the memo pad can be controlled. It is also possible to positively pull in to the storage position so that they do not remain protruding in the passage.
Particularly, in this device, since the forward / backward rotation of the rotating body is converted into the forward / backward movement of the operating shaft by the motion converting means, the conversion mode by the motion converting means and the axial direction by the spring or the like acting on the operating shaft are attached. By appropriately setting the force, it becomes possible to easily and variously control the movement of the rotating body in the front-rear direction.

Further, if a cam surface is formed on the outer edge of the base end portion of the rotating body and the cam surface is slidably contacted with the front end surface of the support body to form a motion converting means, the rotational movement is advanced or retracted by the slidable contact of the cam surface. Converting to motion can be realized without adding special parts. Further, the support is a member having an inner peripheral surface that encloses the operation shaft, and the operation range restricting means is slidably contacted with the transparent window opened on the inner peripheral surface of the support and the opening edge of the transparent window. In order to do so, if it is provided with a pin protruding radially from the outer periphery of the operating shaft, the three-dimensional movement of the memo pad can be integrated only by the pin provided on the operating shaft and the transparent window provided on the support. Controllable.

The turning force control means is constituted by a spring which is provided to bias the actuating shaft in the axial direction and which controls the turning force in the front-rear direction acting on the rotating body in cooperation with the motion converting means, and If a protrusion is provided on the front end surface of the support body to tilt the memo pad forward by contacting the cam surface when the memo pad stands up, the memo pad that has jumped up sideways can be tilted forward by a desired angle. Therefore, it becomes easy to set so that the memo pad can be smoothly rotated to the storage position by its own weight.

If a guide portion for guiding the pin of the operating shaft to tilt the memo pad forward is provided at the opening edge of the transparent window of the support body, just before the memo pad stands up, the memo pad is flipped up to the side. It is possible to reliably prevent the memo pad from remaining at the standing position. Furthermore, if the shape of the window is grooved, the operation of the pin can be uniquely determined, so that a certain sense of stability can be imparted to the operation of the operating shaft during storage, and thus to the operation of the memo pad.

If the front end surface of the support is composed of the sliding member, the rotation of the sliding cam surface can be made smooth, and the wear of the support due to friction can be prevented. Also,
If a flat surface is formed on the actuating shaft to facilitate pivotal attachment of the rotating body and a supplementary member is provided between the flat surface and the inner peripheral surface of the supporting body, a gap between the flat surface and the inner peripheral surface of the supporting body is formed. It is possible to prevent a problem in which the cam surface gradually falls and the operating shaft, and thus the memo pad, rattles. That is,
This makes it possible to smooth the sliding rotation of the cam surface and prevent wear of the support body due to wear. It is also possible to prevent the axial center position from being displaced in the radial direction when the operating shaft rotates.

Further, if a stopper is provided at a position where the movement of the operating shaft is prevented from rotating due to the weight of the memo pad in the use position, the memo pad can be securely held in the use position for stable use. If the condition is good, it can be done. Even with such a configuration, the operating shaft can be easily retracted from the stopper, so that the memo pad can be easily and quickly jumped up from the use position.

[0018]

【Example】

<First Embodiment> Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
0, and a modified example will be described with reference to FIGS. In this embodiment, a memo pad supporting device 2 according to the present invention is applied to a theater chair 1.

Each chair 1 is, as shown in FIGS. 1 to 3,
The backrest 5 is arranged between the rear edges of the left and right side plates 3 and 4, and the seat 6 is erected between the lower end vicinity portions so as to be capable of rising, and the upper ends of the side plates 4 and 4 of the adjacent chair 1 are arranged. An armrest 7 is provided between them. The memo pad support device 2 is disposed in the space 8 formed between the adjacent side plates 4 and 4 below the armrest 7.

As shown in FIGS. 4 and 5, the memo pad supporting device 2 includes a supporting member 11 arranged on one side of the chair 1, an operating shaft 12 held by the supporting member 11, and Working axis 1
A rotating body 13 pivotally attached to the front end portion 12a of the second rotating body 12 so as to be rotatable in a substantially front-rear direction;
An operating range restricting means 15 for restricting the rotation and forward / backward movement of the operating shaft 12 with respect to the support body 11, and a turning force control means 16 for controlling the turning force in the front-rear direction acting on the turning body 13 are provided. A memo pad 17 is attached to the rotating body 13.

The support 11 is a pipe-like member arranged substantially horizontally with its axis in the front-rear direction, and is attached to the side plate 4 of the chair 1 via a bracket 18 rigidly connected to the outer periphery. . The operating shaft 12 is inserted into the support body 11 so as to be able to advance and retreat in the front-rear direction and to be rotatable in the axial direction, and has a front end portion 12a extending forward of the front end surface 11a of the support body 11. ing. The front end 12a of the operating shaft 12 has a shape in which one half is cut off to form a flat surface 12b, and the base end 13a of the rotating body 13 is pivotally attached to the flat surface 12b via the shaft. There is.

The rotating body 13 has a flat plate shape, and a memo pad 17 is fixed to one surface of the rotating body 13 by using a bolt (not shown). 13b is a bolt insertion hole. Motion conversion means 14
The cam surface 21 is formed on the outer edge of the base end portion of the rotating body 13, and the cam surface 21 is brought into sliding contact with the front end surface 11 a of the support body 11. The cam surface 21 includes a use-side linear portion 21a that comes into contact with the front end surface 11a of the support 11 at a use position A described later, an intermediate arc portion 21b, and a storage position D described later.
The storage side linear portion 21c that abuts on the front end surface 11a of the support body 11 in FIG. In this embodiment, the radius of the intermediate arc portion 21b is closer to the use side linear portion 21a (R
Although it is set so as to gradually increase from 1) toward the side (R2) close to the storage-side linear portion 21c, it may be formed so that each portion has the same radius.

The operating range regulating means 15 has a support 11
22 opened on the peripheral wall of and the opening edge 2 of this window 22
And a pin 24 radially projected from the outer periphery of the operating shaft 12 so as to be slidably contacted with the shaft 3. The transparent window 22 has a substantially right-angled triangular shape, and its opening edge 23 has an axial portion 23a parallel to the axial center of the support 11 and a circumferential direction extending from one end of the axial portion 23a in the circumferential direction. It comprises a portion 23b and an inclined portion 23c extending from the end of the circumferential portion 23b toward the other end of the axial portion 23b. In this embodiment, a pair of through windows 22 and 22 are provided with 180 degrees out of phase, and a pin 24 radially penetrated through the operating shaft 12.
Both ends of the are projected into the both transparent windows 22 and 22.

The turning force control means 16 is provided by a spring 25 which is provided for urging the actuating shaft 12 in the axial direction and which controls the turning force in the front-rear direction acting on the rotating body 13 in cooperation with the motion converting means 14. It is configured. Specifically, the turning force control means 16 extends the rear end portion 12c of the operating shaft 12 rearward of the rear end of the support body 11, and attaches the flange member 12e to the rear end surface 12d of the operating shaft 12. Bolt 12f
A compression coil type spring 25 is wound around the operating shaft 12 between the flange member 12e and the support 11 and is interposed by the repulsive force of the spring 25. 12 is elastically biased rearward.

With such a structure, the memo pad 1
7 is held in the horizontal use position (A), as shown in FIG. 4, FIG. 5 and FIG.
The pin 24 of 5 corresponds to the circumferential portion 23b and the inclined portion 23 of the transparent window 22.
Since it is stably held at the intersection with c (see position a in FIG. 10), the rotating body 13 and the memo pad 17 maintain a substantially horizontal posture. In this state, the use side linear portion 21a of the cam surface 21 provided on the rotating body 13 is pressed against the front end surface 11a of the support body 11 by the urging force of the spring 25, so that the rotating body 13 and the memo pad 17 are fixed. It will not rotate forward unless the above force is applied. Therefore, the memo pad 17 can be used in a stable state.

From this state, when the seated person pushes the memo pad 17 forward, as shown in FIG. 6, the rotating body 13 moves the operating shaft 12 forward while resisting the urging force of the spring 25. It will rotate. At that time, as the operating shaft 12 moves forward, the pin 24 is guided by the inclined portion 23c of the transparent window 22, so that a rotational force acts on the operating shaft 12. Therefore, even if the lifting force is not sufficiently applied to the memo pad 17, the memo pad 17 jumps up to the vicinity of the jumping position (B) as shown by the solid line in FIG. Needless to say, when a jumping force is applied to the memo pad 17, the jumping position (B) is reached more smoothly. In any case, according to this device, the memo pad 17 can be directly flipped up from the horizontal use position (A) to the front side diagonally, and the seated person can immediately stand up and leave the chair. .

At the jumping position (B), the center of gravity of the memo pad 17 and the rotating body 13 is located in front of the pivot position of the shaft 19. As a result, the memo pad 17 and the rotating body 13 are caused to move by the spring 2 by the gravity acting on themselves.
It will rotate further forward while resisting the biasing force of 5, and via the intermediate rotation position (C) as shown in FIG.
Towards the storage position (D) shown by the solid line in FIG. At the jumping position (B), the pin 24 of the actuating shaft 12 is moved through the window 2
Since it exists in the middle of the inclined portion 23c of No. 2 (see position b in FIG. 10), when the rotating body 13 is rotated forward and the operating shaft 12 is further advanced, the pin 24 of the pin 24 is inclined.
You will be guided to 3c. Therefore, when the memo pad 17 reaches the intermediate rotation position (C), the pin 2
4 is guided to a position (see position c in FIG. 10) in which it comes into contact with the axial portion 23a, and the working shaft 12 has finished rotating by approximately 90 degrees. It is corrected to a posture parallel to 4 and heads to the storage position (D). Then, before the memo table 17 reaches the storage position (D), the storage-side linear portion 21 of the cam surface 21 provided on the rotating body 13 is provided.
c starts to contact the front end surface 11a of the support 11. As a result, the retracting force of the actuating shaft 12 due to the biasing force of the spring 25 is effectively converted into a force for rotating the rotating body 13 in the storage position (D) direction, and the memo pad 17 is positively operated. Will be pulled into the storage position (D) and held.

Therefore, in such a case, the memo pad 17 in the use position (A) can be quickly jumped up diagonally to the front side to be quickly separated from the chair, and the popped up memo pad is Even if it is left unattended, it automatically rotates while correcting its posture due to the balance between gravity and spring force, and is correctly stored in the storage position (D) set in the lower space 8 of the armrest 7.

As described in detail above, the present invention allows the memo pad to be directly flipped up diagonally from the position of use to the front side, so that not only the usual usability is improved but also in the event of an earthquake or the like. , It is possible to quickly retract the memo pad and leave the chair. Therefore, safety can be improved. Moreover, since the three-dimensional movement of the memo pad is converted into the forward / backward movement and the rotational movement of the operating shaft, the movement range restricting means provided for the movement of the memo pad between the support and the operating shaft. Can be comprehensively controlled by. In addition, the rotation speed control means can control the rotation speed and moderation movement of the memo pad. Therefore, it is relatively easy to automatically store the flipped up memo pad while applying appropriate posture control and speed control.

The rotating body is not limited to the one fixed to the lower surface of the memo pad with screws. For example, when the memo pad is made of synthetic resin, it is inserted into the memo pad. It may be molded. Further, the configuration of the motion converting means is not limited to that of the illustrated embodiment, and various modifications can be made. However, like the above embodiment, the use side linear portion, the intermediate arc portion, and the storage side are provided. If it is composed of a cam surface composed of a straight portion and the actuating shaft is elastically biased rearward, the memo pad can be stably held at both the use position and the storage position. Further, if the radius of the intermediate arc is gradually changed as described above, it is possible to apply a proper braking force to the memo pad which is rotated by its own weight by the spring force, so that the memo pad is rotated. It is possible to prevent excessive acceleration. It is possible to freely control the rotation speed of the memo pad by combining the shape setting of the cam surface and the turning power control means.

Further, the construction of the working range restricting means is not limited to that of the illustrated embodiment, but a pin protruding from the working shaft is simply inserted into the transparent window formed in the support as described above. With such a structure, the number of parts is small, the structure is simple, and a failure or the like is less likely to occur. Further, as in the illustrated embodiment, the opening edge 23 of the transparent window 22 is provided with an axial portion 23a,
If it is composed of the circumferential portion 23b and the inclined portion 23c, not only the direct jumping operation to the diagonal front side as described above but also the conventional operation can be performed. That is, according to the configuration of the illustrated embodiment, as shown in FIG.
The memo pad 17 is lifted sideways from the use position (A) to the standing position (E) as usual (for the pin 24, refer to the position e of FIG. 10), and the middle position is rotated from the standing position (E). It is also possible to lead to the storage position (D) via the position (C).

When the memo pad can be rotated from the use position to the standing position, as shown in FIG. 11 or FIG. 12, in order to facilitate the pivot of the memo pad toward the storage position by its own weight. You can also take appropriate measures. That is, in the structure shown in FIG. 11, the pin 24 of the operating shaft 12 is guided in the middle of the circumferential portion 23b at the opening edge 23 of the transparent window 22 just before the memo pad 17 is erected to tilt the memo pad 17 forward. The guide portion 23d is provided for the purpose. That is, according to this configuration, when the memo pad 17 is erected, the pin 24 moves from the position a to the position f due to the presence of the guide portion 23d.
Since the rotating body 13 is guided to the position, the rotating body 13 rotates sideward while rotating forward, and tilts forward in the standing position. Of course, the shape of the guide portion may be other. In FIG. 12, the front end surface 11a of the support body 11 abuts against the cam surface 21 of the rotating body 13 when the memo pad 17 is erected to project the memo pad 17 forward by a predetermined angle k. The part 11b is provided. With this configuration, the memo pad that has flipped up to the side can be tilted forward by a desired angle, and therefore, it becomes easy to set the memo pad so that it can be smoothly rotated to the storage position by its own weight.

Besides, various modifications can be made without departing from the spirit of the present invention. <Second Embodiment> A second embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. In this embodiment, the memo pad support device 102 according to the present invention is applied to a chair 101 for theater.

As shown in FIGS. 13 to 15, each chair 101 includes a backrest 1 between the rear edges of the left and right side plates 103 and 104.
No. 05 is arranged, and a seat 106 is erected so as to be able to rise between lower end vicinity portions.
An armrest 107 is fixedly installed on the upper ends of 4, 104. A gap is partially formed between the armrest 107 and the upper end of the side plate 104, and the memo pad support device 102 is arranged in this gap.

More specifically, as shown in FIGS. 16 to 18, the memo pad supporting device 102 includes a support member 111 arranged on one side of the chair 101 and an operating shaft held by the support member 111. 112, a rotating body 113 pivotally attached to a front end portion 112a of the operating shaft 112 so as to be rotatable in a substantially front-back direction, and a front-back direction rotating operation of the rotating body 113 is converted into an advancing and retracting operation of the operating shaft 112. Motion conversion means 114 and support 11
1, an operating range restricting means 115 for restricting the rotation and forward / backward movement of the actuating shaft 112 with respect to 1, and a turning force control means 1 for controlling the turning force in the front-back direction acting on the turning body 113.
16 and the memo base 117 is attached to the rotating body 113.

The support 111 is made of, for example, a hard resin made of the same material and is hinged so as to be openable and closable around the axis m, and a support lid 111b.
The support lid portion 111b is connected to the support base portion 11
They are attached to the side plate 104 with the lid 1a attached. A through hole is provided inside the support body 111. The through hole is a support hole 118a that forms an inner peripheral surface that encloses the actuating shaft 112 on the front half side and a rear half side that will be described later. Spring chamber 11 for housing the spring 125
It is a series with 8b. Then, at the opening end of the support hole 118a, an opening hole 130 having a slightly larger diameter than that is formed.
The sliding member 131 having the flange 131a on the front end side is attached to the opening hole 130, and the front end surface 11 of the support body 11 on which the cam surface 121 described later is slid by the flange 131a is mounted.
1e. It should be noted that the circular arc groove 130 is provided at a position adjacent to the inner side of the opening hole 130 over a region of approximately 180 °.
A is provided as a recess, and a stopper 107a is provided at the inner peripheral position of the arc groove 130a. This stopper 107a
Is screwed to a screw 107b inserted from the support cover 111b, and the depth of penetration into the arc groove 130a can be adjusted by operating the screw 107b by engaging a hexagon wrench or the like. .

The operating shaft 112 is a metal rod having a diameter substantially the same as that of the support hole 118a, and is inserted into the support hole 118a so as to be able to move forward and backward and to be rotatable about its axis.
That is, the actuating shaft 112 is arranged such that its rear end is located in the spring chamber 118b, its middle part is located in the support hole 118a, and its front end 112a is located in a position extending forward of the support front end face 111e. Operating shaft front end 1
A flat surface 112b is formed on a portion of the semi-circular cross section which is left by partially cutting off one half of 12a, and the base end 113a of the rotating body 113 is attached to the flat surface 112b via a shaft 119. It is pivotally attached.

When the actuating shaft 112 is accommodated in the support hole 118a, a gap having a semicircular cross section is formed between the flat surface 112b and the support hole 118a. In this embodiment, this gap is filled. A top 132, which is a supplementary member, is arranged at the position. The top 132 has a semicircular cross section corresponding to the cut portion of the operating shaft 112, and the diameter thereof is the support hole 11.
A main body 132a substantially equal to the inner circumference of 8a, and the main body 132a
A projecting piece 132b that is integrally projected and has a tip inserted into the arc groove 130a so as to be freely movable. The top 132 is slidable relative to the flat surface 112b of the actuating shaft 112 and rotates integrally with the actuating shaft 112 in the support hole 118a, but the protruding piece 132b is housed in the arc groove 130a. Therefore, the top 132 itself cannot move in the axial direction of the support body 111. When the top 132 is thus positioned in the axial direction, the front end surface 132c thereof is set to be substantially in the same position as the front surface of the flange 131a of the sliding member 131. That is, the top 132 is formed by the sliding member 131.
Together with the cam surface 121, the supporting member front end surface 111e
Is composed. Further, in the direction in which the operating shaft 112 tries to rotate due to the weight of the memo pad 117 in the use position (A) shown in FIG. 18, the stopper 1 shown in FIGS.
Since 07a is provided, the protruding piece 132b abuts against the stopper 107a to prohibit further rotation of the operating shaft 112.

The rotating body 113 has a flat plate shape, and has a memo pad mounting portion 113c to which the memo pad 117 is fixed by a bolt insertion hole and a bolt (not shown), and a flat surface 112b of the working shaft front end 112a at a pivot point 113d. And a base end portion 113a pivotally attached to the base end portion 1a.
A cam surface 121, which is a component of the motion converting means 114, is formed on the outer edge of 13a together with the support front end surface 111e.

That is, the motion converting means 114 changes the distance from the pivotal support point 113d by rotating the rotating body 113 in the front-rear direction while the cam surface 121 is in sliding contact with the support body front end surface 111e. The surface 111e is used as a scaffold to urge the operating shaft 112 in the axial direction. More specifically, the cam surface 121 is
A use-side straight portion 121a that abuts the support body front end surface 111e in the use position (A) shown in FIGS. 16 and 18, and a support body front end surface 111 in the storage position (D) shown in FIG.
The storage-side linear portion 121c that abuts on e and the use-side linear portion 1
21a and the storage-side linear portion 121c, a first intermediate portion 121d and a second intermediate portion 121e. That is, as shown in FIG. 16, the first intermediate portion 121d has a partial arc shape continuous with the use-side linear portion 121a, and the second intermediate portion 121e has an L-shape continuous with the storage-side linear portion 121c. The distance between the cam surface 121 and the pivot point 113d is set by setting the length of the perpendicular line drawn from the pivot point 113d to the use side straight portion 121a to L1, the boundary 121g between the first intermediate portion 121d and the second intermediate portion 121e, and the first 2 The distance from the pivot point 113d at the boundary 121h between the intermediate portion 121e and the storage-side linear portion 121c is L2, and the boundary 121g and the boundary 121
The pivot point 11 in the convex portion 121i located in the middle of h
When the distance from 3d is L3, L1 <L2 <L3 is set.

As shown in FIGS. 16 and 17, the operating range restricting means 115 engages with the groove 122, which is a transparent window provided in the support hole 118a of the support member 111, and the groove 122 so as to be free to move. Therefore, the pin 1 is projected from the outer periphery of the operating shaft 112 in the radial direction of the operating shaft 112 with a diameter substantially the same as the width of the groove 122.
24 and. The pin 124 is constructed by axially mounting a bearing 124a by a shaft 124b in order to reduce friction with the groove 122. The groove 122 is the support hole 1
A stationary point P, which is substantially positioned in a horizontal plane passing through the axis of 18a, is used as a starting point, and the stationary point is moved from the stationary point P on a spiral that advances when traveling clockwise from the rear side by a distance (L2-L1). Bounce point Q at a position 90 degrees from P
The guide groove 122a extends up to the upper end, and the free moving groove 122b is provided straight in the axial direction forward from the flip-up point Q over a length of (L3−L2) or more and ends at the extension point R. The position of the pin 124 on the actuating shaft 112 is the memo pad 1
When 17 is in the use position (A) shown in FIG. 18, it is set so as to come to the stationary point P.

The turning force control means 116 is provided so as to urge the actuating shaft 112 in the axial direction, and the operation converting means 1 described above is provided.
It is configured by a spring 125 that controls the turning force in the front-rear direction acting on the rotating body 113 in cooperation with 14. Specifically, as shown in FIG. 16, the bolt 112f is provided on the rear end surface 112d of the operating shaft 112 extending to the rear of the support body 111.
The spring retainer 112e is screwed by using, and a compression coil type spring 125 is wound around the operating shaft 112 and interposed between the spring retainer 112e and the inner end surface of the spring chamber 118b. The repulsive force of the spring 125 elastically biases the operating shaft 112 rearward. The spring force can be adjusted by engaging a hexagon wrench or the like with the bolt 112f to change the screwing position of the spring retainer 112e with respect to the actuating shaft 112.

The operation of using and storing the memo pad 117 using the memo pad supporting device 102 having such a structure will be described with reference to FIGS. The memo stand 117 is shown in FIG.
When held in the horizontal use position (A) shown in 8,
Since the spring 125 pulls the actuating shaft 112 rearward via the spring retainer 112e, the use-side linear portion 121a of the cam surface 121 formed on the rotating body 113 is formed.
Is pressed against the front end surface 111e of the support, and at this time, the pin 124 of the operating range restricting means 115 causes the stationary point P of the groove 122 to move.
Is kept stable. To rotate the rotating body 113 together with the memo pad 117 from the use position (A) to the front, the cam surface 121
The rotating body 113 needs to rotate while the first intermediate portion 121d is in sliding contact with the support body front end surface 111e. For that purpose, the spring 125 needs to be further compressed from that position due to the relationship of L1 <L2. Therefore, the rotating body 113 and the memo pad 117 are prevented from being easily displaced from the use position (A). At this time, the frame 132
Since the protruding piece 132b protruding from the abutment contacts the stopper 107a, the posture of the memo pad 117 is stable, and its stability increases with an increase in the top load.

Next, consider the case where the seated person applies an operation force to the memo pad 117 from this state toward the front, upward or obliquely upward. When the operation direction is from the front side, the first intermediate portion 12 of the cam surface 121 of the rotating body 113.
1d continuously slides on the front end surface 111e of the support body 111, and in the meantime, the operating shaft 112 is moved by an amount corresponding to L2-L1.
Is advanced. Then, as a result, the pin 124 of the actuating shaft 112 moves spirally along the inside of the guide groove 122a from the stationary point P located at the rear of the lateral position of the groove 122, and the actuating shaft 11
Rotate 2 to the right when viewed from the rear. As a result, in the memo pad 117, the boundary 121g of the cam surface 121 passes through the jumping position (B) shown in FIG.
The first intermediate position C1 facing 11e is reached. On the other hand, when the above-described operation direction is close to the direction perpendicular to the axis of the operating shaft 112 (that is, the ascending direction), the pin 124 guides the guide groove 122a before the cam surface 121 abuts the support body front end surface 111e. Since the cam surface 121 of the rotating body 113 is not always in sliding contact with the front end surface 111e of the support body since it starts to move in the spiral direction along the axis of movement, in this case also, the operating shaft 112
Is still rotating clockwise while advancing forward. Then, in this case, the memo pad 117 goes to the first intermediate position (C1) via the higher jumping position (B).

However, the weight of the memo pad 117 acts on the rotating body 113 from the use position (A) to the first intermediate position (C1) regardless of such an operation path, and this causes A rotating moment about the pivot point 113d acts on the rotating body 113. However, in this embodiment, the spring 125 moves to L as the operating shaft 112 moves forward.
2-L1 is compressed, and the restoring force causes the operating shaft 11
Since the rapid forward movement of No. 2 is suppressed, the memo pad 117 is rapidly rotated during the transition from the use position (A) to the jumping position (B) or the vicinity thereof to the first intermediate position (C1). The motion is slowed down and the safety of operation is ensured. With such an operation, the front of the seat 106 is opened, and the seated person can immediately stand up and leave the chair 101. During this period, the axial center position of the actuating shaft 112 is prevented from rattling during rotation because the cutout portion of the actuating shaft front end 112a is compensated by the top 132.

Thereafter, the rotating body 113 moves further downward from the first intermediate position (C1) shown in FIG. 20 due to the weight of the memo pad 117, but the boundary 121 in the motion converting means 114.
The distance L2 from the cam surface 121 to the pivot point 113d at g is the cam surface 121 to the pivot point 1 at the convex portion 121i.
Since the distance L3 up to 13d is smaller than the distance L3, the cam surface 121 remains in contact with the front end surface 111e of the support 111, and the boundary 1
The rotating body 113 rotates while further compressing the spring 125 between the first intermediate position where 21g faces the support front end surface 111e and the second intermediate position (C2) where the convex portion 121i faces the support front end surface 111e. Move. Then, the repulsive force of the spring 125 at this time acts as a deterrent force for the rotating operation of the rotating body 113, and the rotating body 113 is fixed to the memo pad 117.
2nd intermediate position (C2) while slowly rotating with
Reach

At this time, in the operating range restricting means 115, the pin 124 jumps up along the floating groove 122b at the point Q.
Since it can move to the extension point R which is a distance (L3-L2) or more before, the forward movement of the operating shaft 112 is not hindered. Further, since the floating groove 122b extends straight in the front-rear direction, there is no action of rotating the rotating body 113 in the left-right direction, and the memo pad 117 descends while its top plate surface is held vertically.

The rotary body 113 and the memo pad 117 are shown in FIG.
When the second intermediate position (C2) shown in FIG. 2 is exceeded, due to the relationship of L2 <L3, the motion converting means 114 retracts the operating shaft 112 and the rotating body 113 by the urging force of the spring 125, and at the same time moves the rotating body 113 further downward. Rotate,
The memo pad 117 is pulled in and guided to the storage position (D) shown in FIG. In this embodiment, at this storage position (D), the memo pad 117 has one side plate 10 as shown in FIG.
4 is housed in a gap 133a formed between the inner surface of the seat 4 and the seat 106. Then, at this time, the pin 124 of the operating range regulating means 115 is guided to a position close to the extension point R shown in FIG. At the storage position D, the storage-side linear portion 121 of the cam surface 121 is formed on the support front end surface 111e.
However, in this state, the distance L2 between the cam surface 121 and the pivot point 113d is shorter than the distance L3 between the cam surface 121 and the pivot point 113d in the convex portion 121i. The memo pad 117 is located at the second position from the storage position (D) unless the force to counteract
It does not reversely rotate in the direction of the intermediate position (C2), and serves to stably hold the memo pad 117 at the storage position (D).

That is, the memo pad supporting device 10 of this embodiment.
If 2 is applied to the chair, the memo pad 1 in the use position (A)
The seated person can be swiftly retracted from the chair 101 by jumping up 17 diagonally to the front and side, and the memo table 117 can be safely rotated from the jumped up position to the storage position (D). can do. In this embodiment, the memo pad 117 is moved to the side plate 1 in the process from the use position (A) to the jumping position (B) to the first intermediate position (C1).
04 to a standing posture parallel to the first intermediate position (C
The pin 124 is provided between 1) and the storage position (D).
Since the floating groove 122b that guides the table is extended straight in the front-rear direction, only the pivotal movement around the pivot point 113d is performed while the surface of the memo pad 117 is kept vertical. Even if the memo pad 117 is accommodated in the gap 133a between the side plate 104 and the seat 106 as shown in FIG. 7, a sufficient space for seating can be secured, and at the same time, the memo pad 117 becomes an obstacle when sitting. Can be effectively prevented.

As described above in detail, this embodiment is the memo pad 1
Since 17 can be directly flipped up diagonally from the use position (A) to the front side, not only is the convenience of daily use improved, but also in the event of an earthquake, etc. It is possible to move away from.
Therefore, safety can be improved. Moreover, since the three-dimensional movement of the memo pad 117 is converted into the forward / backward movement and the rotational movement of the actuation shaft 112, the movement of the memo pad 117 is provided between the support 111 and the actuation shaft 112. It can be comprehensively controlled by the operating range regulating means 115. In addition, the turning speed control means 116 can control the rotation speed and moderation movement of the memo pad 117. Therefore, the flipped-up memo pad 117 is automatically operated while appropriate posture control and speed control are added. It can be relatively easily carried out. Particularly, in this embodiment, since the spring force is adjusted through the bolt 112f, the stability of the memo pad 117 in the use position (A) and the smooth operability when the memo pad 117 is flipped up are shown. It is possible to easily perform the adjustment for achieving both.

Further, the cam surface 121 is connected to the use side linear portion 121.
a, the storage side linear portion 121c, the first intermediate portion 121d, and the second
The intermediate shaft 121e and the working shaft 11
Since 2 is elastically biased rearward by the spring 125, the memo pad 117 can be stably held in both the use position (A) and the storage position (D), and the shape of the cam surface 121 can be set. It is necessary to apply a force that opposes the urging force of the rotation force control means 116 in order to rotate the memo pad 117 from the use position (A) or the storage position (D) by the combination of the rotation force control means 116 and the rotation force control means 116. With such a structure, the memo pad 117 can be prevented from wobbling, and the memo pad 117 can be appropriately braked by a spring force to freely control the rotation speed and moderation movement of the memo pad 117. .

Further, in the operating range restricting means 115, the groove 122 is provided with a recess having substantially the same width as that of the pin 124 so as to uniquely determine the movement of the guided pin 124. Therefore, the operation of the memo pad 117 is performed. It is possible to give a good operation feeling. Further, since the front end surface 111e of the support body is mainly composed of the sliding member 131 and the like, the rotation of the cam surface 121 that is in sliding contact is smooth, and the wear of the support body 111 due to friction can be prevented. At the same time,
Since the sliding member 131 also serves as a lid for the top 132, it is possible to prevent a problem that dust and the like enter the gap between the top 132 and the support hole 118a and cause malfunction.

In particular, the front end portion 111e of the operating shaft and the support hole 11
8a and the top 13 which rotates in conjunction with the operating shaft 112
2 is provided, and the front end surface 132c of the top 132 is a part of the front end surface 111e of the support, the operating shaft 11
When 2 moves forward and backward, the cam surface 121 gradually falls into the opening of the sliding member 131 and the operating shaft 112, and by extension, the memo pad 1.
There is no rattling in the operation of 17, and the operability for the memo pad 117 can be further improved, and at the same time, the wear of the support 111 due to friction can be prevented more effectively. It is also effective in preventing the axial center position from shifting when the operating shaft 112 rotates.

Further, the protruding piece 132b is integrally formed with the top 132.
And the stopper 1 provided with the protruding piece 132b in the support hole 118a when the memo pad 117 is in the use position (A).
Since it is made to abut against 07a, the memo table 117
Does not rattle in the vertical direction during use, and when the memo pad 117 is flipped up, the protruding piece 132b can be easily separated from the stopper 107a, and the memo pad 117 can be flipped up without difficulty. Especially, the position of the stopper 107 should be set to the screw 107.
Since the adjustment can be made through b, the top surface of the memo pad 117 in the use position (A) can be easily adjusted horizontally.

Further, the gap 1 between the side plate 104 and the seat 106
Even if the memo pad 117 is housed in 33a, the memo pad supporting device of the present embodiment causes the memo pad 117 to guide the floating groove 122b and the pin 124 to the first intermediate position (C1).
Since it is rotated in the vertical posture from the storage position (D) to the storage position (D), it is not necessary to secure a very large space in the gap 133a, and even if the memo pad 117 is stored, it is necessary for sitting. It is possible to secure a sufficient space and effectively prevent the memo pad 117 from getting in the way when sitting.

The specific construction of each part is not limited to the above-mentioned embodiment. For example, as shown in FIG. 22, a stopper 207a may be arranged on the lower surface of the armrest 107 on one side of the chair 101. That is, the stopper 207a is a pivot point 113d of the rotating body 113 when the memo pad 117 is in the use position (A).
It is provided so as to be located on the end opposite to the memo pad mounting portion 113c with respect to each other, that is, directly above the end edge of the base end portion 113a. The same effect as that of the above-described embodiment can be obtained in that the can be fixed.

Other various modifications are possible without departing from the spirit of the present invention.

[0058]

As described above in detail, according to the present invention, the memo pad can be directly flipped up from the position of use to the front side in a diagonal direction. In this case, it is possible to quickly retract the memo pad and leave the chair. Therefore, safety can be improved. Moreover, since the three-dimensional movement of the memo pad is converted into the forward / backward movement and the rotational movement of the operating shaft, the movement range restricting means provided for the movement of the memo pad between the support and the operating shaft. Can be comprehensively controlled by. In addition, since the turning speed control means can control the rotation speed and moderation of the memo pad, the flipped memo pad is automatically stored while adding appropriate posture control and speed control. Things to do can also be done relatively easily.

Furthermore, if a cam surface is formed on the outer edge of the base end portion of the rotating body, and this cam surface is brought into sliding contact with the front end surface of the support body to form a motion converting means, no special part is added to the motion converting means. Can be realized and the structure can be simplified. Further, the support is a member having an inner peripheral surface that encloses the operation shaft, and the operation range restricting means is slidably contacted with the transparent window opened on the inner peripheral surface of the support and the opening edge of the transparent window. In order to do so, if it is provided with a pin protruding radially from the outer periphery of the operating shaft, the three-dimensional movement of the memo pad can be integrated only by the pin provided on the operating shaft and the transparent window provided on the support. Control can be performed, and in particular, reliable operation and simplified structure can be achieved.

The turning force control means is constituted by a spring which is provided to urge the actuating shaft in the axial direction and which controls the turning force in the front-rear direction acting on the rotating body in cooperation with the motion converting means. If a protrusion is provided on the front end surface of the support body to tilt the memo pad forward by contacting the cam surface when the memo pad stands up, the memo pad that has jumped up sideways can be tilted forward by a desired angle. Therefore, it becomes easy to set so that the memo pad can be smoothly rotated to the storage position by its own weight.

If a guide portion for guiding the pin of the operating shaft to incline the memo pad forward is provided at the opening edge of the window of the support body, immediately before the memo pad stands up, the memo pad is flipped up to the side. It is possible to reliably prevent the memo pad from remaining in the standing position. further,
If the shape of the window is a groove whose opening edge width is almost the same as that of the pin, the operation of the memo pad can be uniquely determined by uniquely determining the operation of the pin, and the operation during storage is stable. It is possible to give a good operation feeling.

If the front end surface of the support is composed of a sliding member, it is possible to smoothly rotate the cam surface in sliding contact, and thus the behavior of the memo pad, and effectively prevent wear of the support due to friction. can do. When a flat surface for pivotally attaching the rotating body is formed at the front end of the actuating shaft, a supplementary member that constitutes the front end surface of the support together with the sliding member is provided between the flat surface and the inner peripheral surface of the support. If it is provided, it is possible to effectively prevent the cam surface from gradually falling into the gap between the flat surface and the peripheral surface of the support body and rattling the operating shaft, which ensures a smooth behavior of the memo pad. can do. Further, since the thickness deficient portion of the operating shaft is filled up, it is possible to prevent the axial center position of the operating shaft from being displaced in the radial direction during rotation.

Further, when the stopper is arranged at a position where the actuating shaft or a part of the rotating body abuts when the memo pad is in the use position, it does not hinder the flip-up operation of the memo pad.
It becomes possible to effectively improve the stability during use.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention.

FIG. 2 is a plan view showing the same embodiment.

FIG. 3 is a side view showing the same embodiment.

FIG. 4 is a plan sectional view showing a main part of the embodiment.

FIG. 5 is a perspective view showing the main part.

FIG. 6 is an explanatory view of the operation of the same embodiment.

FIG. 7 is an operation explanatory view of the same embodiment.

FIG. 8 is an explanatory view of the operation of the same embodiment.

FIG. 9 is an operation explanatory view of the same embodiment.

FIG. 10 is an operation explanatory view showing an operation range restricting means of the embodiment.

FIG. 11 is an explanatory diagram corresponding to FIG. 10 showing a modified example of the same embodiment.

FIG. 12 is a perspective view showing still another modified example of the same embodiment.

FIG. 13 is a front view showing a second embodiment of the present invention.

FIG. 14 is a plan view showing the same embodiment.

FIG. 15 is a side view showing the same embodiment.

FIG. 16 is a plan sectional view showing a main part of the embodiment.

FIG. 17 is an exploded perspective view showing the main part.

FIG. 18 is a perspective view showing the same main part.

FIG. 19 is an explanatory view of the operation of the embodiment.

FIG. 20 is an operation explanatory view of the same embodiment.

FIG. 21 is a front view showing a seat support portion of a chair to which the embodiment is applied.

FIG. 22 is a view showing a modified example of the stopper.

[Explanation of symbols]

 1, 101 ... Chair 2, 102 ... Memo base support device 11, 111 ... Support 11a, 111e ... Front end face 11b ... Projection 12, 112 ... Actuating shafts 12a, 112a ... Front end 13, 113 ... Rotating body 14, 114 ... operation conversion means 15, 115 ... operating range regulation means 16, 116 ... turning power control means 17, 117 ... memo pad 21, 121 ... cam surface 22, 122 ... window (window, groove) 23 ... opening edge 23d ... Guide parts 24, 124 ... Pins 25, 125 ... Spring 107a, 207a ... Stopper 112b ... Flat surface 131 ... Sliding member 132 ... Complementary member (frame)

Claims (10)

[Claims] 1. A support body disposed on one side of a chair, an operating shaft which is supported by the support body so as to be capable of advancing and retracting in a substantially front-back direction and rotatable about an axis, and a front end of the operating shaft. And a rotating body which is pivotally attached to the portion so as to be rotatable in substantially the front-rear direction and is also rotated substantially in the left-right direction as the operating shaft rotates. A motion converting means for converting into a motion range, an operating range restricting means for restricting the operating range of the memo pad by restricting the rotation and forward / backward movement of the operating shaft with respect to the support, and the forward / backward rotational force acting on the rotating body And a turning force control means for controlling the operating range so that the memo pad mounted on the rotating body can be directly flipped up from an at least substantially horizontal use position to an oblique front side. Characterized by setting a regulation range by regulation means Note platform support device. 2. The memo base support according to claim 1, wherein the motion converting means has a cam surface formed on the outer edge of the base end portion of the rotating body, and the cam surface is brought into sliding contact with the front end surface of the support body. apparatus. 3. A support body is a member having an inner peripheral surface for enclosing an operating shaft, and the operating range restricting means has a transparent window opened on the inner peripheral surface of the support body, and an opening edge of the transparent window. The memo pad support device according to claim 1 or 2, further comprising: a pin projecting radially from an outer periphery of the actuating shaft so as to be slidably contacted with the memo pad. 4. The turning force control means is constituted by a spring which is provided to bias the actuating shaft in the axial direction and controls the turning force in the front-rear direction acting on the rotating body in cooperation with the motion converting means. The memo pad support device according to claim 1, 2 or 3. 5. A memo according to claim 2, 3 or 4, wherein the front end surface of the support is provided with a protrusion for abutting against the cam surface when the memo pad stands up and tilting the memo pad forward. Platform support device. 6. A guide part for guiding a pin of an operating shaft to tilt the memo pad forward just before the memo pad stands up, at the opening edge of the window of the support. Or the memo pad supporting device described in 4. 7. The memo pad supporting device according to claim 3, wherein the shape of the window is a groove whose opening edge width is substantially equal to the diameter of the pin. 8. The memo pad supporting device according to claim 2, wherein the front end surface of the support member is constituted by a sliding member for smoothing the rotation of the sliding cam surface. 9. A flat surface for pivotally holding a rotating body is formed at a front end portion of an actuating shaft, and the flat surface and the peripheral surface of the supporting body rotate and operate in conjunction with the actuating shaft. 9. The memo pad support device according to claim 8, further comprising a supplementary member that is held at a position that is substantially continuous with the sliding member and that forms a front end face of the support together with the sliding member regardless of the movement of the shaft. 10. A stopper is provided at a position where the operating shaft is in a direction in which it is about to rotate due to the weight of the memo pad in the use position and the rotation is prohibited. The memo pad support device according to 4, 5, 6, 7, 8 or 9.