JP3262081B2 - Attitude control device for rotating board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a posture control device for a rotating board, and more particularly to a posture control device capable of easily holding a board body such as a blackboard or a bulletin board in a predetermined posture and rotating the board body.

[0002]

2. Description of the Related Art Conventionally, in a rotating blackboard, a lock device capable of fixing a writing surface of the blackboard body to a frame in a position substantially in a vertical plane, while permitting rotation of the blackboard body as necessary. Are known.
For example, Japanese Utility Model Publication No. 3-29192 discloses a structure in which lock devices are provided at two positions along the lower outer edge when the blackboard body is in a vertical posture. The locking device includes an arm having a groove for receiving and engaging the outer edge portion of the blackboard main body, a spring for urging the arm so that the groove is engaged with the outer edge portion, and an attachment of the spring. It comprises a link mechanism for lowering the free end side of the arm against the force, and an operation knob connected to the link mechanism and provided on a column supporting the blackboard body.

In the lock device, the free end of the arm can be lowered against the urging force of the spring by grasping the operation knob and rotating it in a predetermined direction, thereby allowing the blackboard body to rotate. .

[0004]

However, in the apparatus disclosed in Japanese Utility Model Publication No. 3-29192, when changing the top and bottom of the rotating board, the rotating board is moved in such a manner that the upper end of the rotating board is in a so-called backward rotation. It does not permit rotation in the forward rotation direction. Therefore, when the rotating board is turned forward by mistake, the outer edge portion of the rotating board hits the tip of the arm, which causes the locking device to be damaged. In addition, since the operation knob is provided on the column, the operation knob is spaced apart from the link mechanism for changing the posture of the arm, and the operating force for performing the predetermined operation of the link mechanism cannot be reduced.
Also, in general, when rotating the blackboard body, it is usually performed at a position where a person comes into contact with the support of the rotating blackboard, so that the clothing of the person performing the rotation is caught by the rotation of the operation knob. There is also a risk of being dropped.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of such inconveniences. The object of the present invention is to change the attitude of the rotating board, that is, the vertical position, by rotating the rotating board in any direction. An object of the present invention is to provide a rotating blackboard attitude control device that can be rotated and can reduce the operational burden.

[0006]

In order to achieve the above object, the present invention is directed to a frame mounted on a frame rotatably supporting a board body provided with a writing surface or a posting surface, and attached to an outer edge portion of the board body. In a posture control device for a rotating board provided with a lock device that engages to regulate the rotation of the board main body while releasing the engagement and permits rotation of the board main body, the lock device is fixed to the frame. A first position that is rotatably supported by the base and that engages the outer edge portion from front and rear, and a second position that releases the engagement from the first position A pair of front and rear displaceable holding members, and control means for controlling the positions of these holding members. The holding members are always held at the first position, and are held by the holding members. When the engagement is released and re-engaged, the other holding member is pressed by the outer edge portion and is displaced to the second position while one holding member is maintained at the first position. ing. In this configuration, the board body is held at a position where the board body is in a substantially vertical posture by engaging each holding member so as to sandwich the front and rear of the outer edge portion. When the board body is turned upside down, it is sufficient to operate the control means to displace each of the holding members to the second position, whereby the outer edge portion becomes free with respect to the holding members. Then, by releasing the operating force to the control means after the outer edge portion has escaped from the engagement position with the holding member, each of the holding members returns to the first position, and the inverted outer edge portion returns to the holding position. When guiding and re-engaging,
While one side acts as a stopper while maintaining the first position,
The other is displaced to the second position to receive the outer edge portion and allow re-engagement. Therefore, with such a configuration, it is possible to re-engage the board between the sandwiching members regardless of whether the board body is rotated in any of the front and rear directions, and to provide a rotary board posture control device excellent in operability. be able to.

[0007]

The control means comprises a spring for urging the holding member to a first position and a lever for displacing the holding member to a second position against the urging force of the spring. It is good to configure. As a result, the holding member is always maintained at the engagement position, and the board body is held in a fixed posture unless the lever is rotated.

[0008] Further, the holding member is formed of a block body that is rotatably combined without interfering with each other, and via a shaft that penetrates a hole provided on the inner free end side of each block body. A configuration that is provided so as to be rotatable at the same time is adopted. This makes it possible to achieve a simple configuration in which one holding member is shared and each holding member is simultaneously rotated. At this time, it is preferable that the shape of the hole is an elliptical hole larger than the diameter of the shaft. As a result, while only the holding member that has received the pressing force at the outer edge portion is displaced to the second position, the holding member that does not receive the pressing force is maintained at the first position. When rotating to engage, it is possible to prevent passing through the engagement position.

The lever has a structure in which an intermediate portion is rotatably supported by a base, and one end of the lever engages with the shaft, while the other end projects forward of the base. With this configuration, the operating force of the lever is directly applied to the holding member, and the operation can be performed without requiring a large operating force.

[0010] The lock devices may be provided at a plurality of locations on the same line along the outer edge of the board body, and each of these lock devices may be provided so as to be simultaneously controllable via a common shaft passing through the lock device. According to this structure, the operation of one lock device is extended to the other lock device, so that the operation of each lock device can be omitted. It is effective for At this time, the common shaft may extend through a powder receiving tray mounted on the frame. As a result, the presence of the common shaft is hidden by the powder receiving tray, so that the appearance can be satisfactorily secured.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the terms “front” and “front end” are used for the near side with reference to FIG. 1, while the terms “rear” and “rear end” are used for the depth side in FIG. Also, the term “left and right” is used with reference to the state of FIG. 1 viewed from the front.

FIG. 1 is a front view showing an embodiment in which the present invention is applied to a rotating blackboard, and FIG. 2 is a right side view thereof. In these figures, the rotating blackboard 10 includes a board body 11, a frame 12 supporting the board body 11, and a pair of left and right locking devices 13 disposed between the frame 12 and the lower outer edge of the board body 11. It is comprised including.

The board body 11 is constituted by a white board in which each of the front and back surfaces is a writing surface.
On its outer peripheral side, a decorative frame 15 which is
The upper and lower edges of the decorative frame 15 form two outer left and right edges which engage and disengage with the lock device 13. It has become.

The frame 12 includes a pair of right and left columns 1.
9, 19, a prism-shaped connecting bar 20 spanned between the columns 19, 19, and a leg 2 provided at the lower end of the column 19.
The board main body 11 is rotatably provided at the upper position of the support column 19 by pivotally supporting the left and right sides of the board main body 11.

As shown in FIGS. 3 to 5, the lock device 13 includes a base 2 mounted on the connecting bar 20.
3, a pair of front and rear holding members 24 rotatably supported by the base 23, control means 25 for displacing the holding members 24 in attitude, and a cover 26 attached around the base 23. Have been.

As shown in FIGS. 5 and 6, the base 23 has a pair of left and right support plates 28 each having a lower shape that straddles the connecting bar 20 in the front-rear direction, and is located between the front ends of the support plates 28. And a front wall portion 29 in which the lower region bulges inward and is divided into two, and a support plate 28.
5 and a downward U-shaped fixing member 31 which is connected to the support plate 28 on the right side in FIG. The base 23 is fixed to the connecting bar 20 by the front and rear pieces of the fixing member 31 and bolts 33 inserted into the connecting bar 20.

At the top of both front and rear ends of the support plate 28, wings 34 projecting in a semi-arc shape are provided, and these wings 34 have holes 35 located on the same axis along the left-right direction.
Are formed respectively. A vertically extending slot hole 36 is formed in the center of the support plate 28, and small holes 37 are formed in front and rear positions of the slot hole 36. Is formed with a shaft insertion hole 39 penetrating in the left-right direction.

The holding member 24 comprises a front holding member 24A and a rear holding member 24B which can be combined without interfering with each other.
4A and 24B are constituted by hollow blocks that open downward as shown in FIG. The front holding member 24A is divided into two recesses at the rear side when viewed from above.
The rear holding member 24 </ b> B is provided in an external shape including a convex portion 41 received in the concave portion 40.

The front holding member 24A has a front inclined surface 4 as a guide portion in which the upper front half region becomes lower toward the front end.
2 and a pair of left and right rear inclined surfaces 44 which are continuously provided to the rear end of the front inclined surface 42 via a stepped portion 43 and are provided gradually lower toward the rear end. . In the left and right side wall portions 45 of the front holding member 24A,
A hole 46 is formed in the upper front position thereof, and this hole 46 is formed.
And the rotation support shaft 47 is inserted therethrough. The rotation support shaft 47 is connected to the support plate 2.
By being supported by the hole 35 formed in the front side wing part 34 of the front part 8, the rear part, ie, the inward side, of the front holding member 24A is rotatable in the vertical direction as a free end. An elliptical hole 48 is formed on the free end side of the side wall portion 45, and a shaft 49 is provided in the elliptical hole 48 so as to be freely inserted. The step 43 is provided on an arc surface centered on the hole 46, and when the free end side of the front holding member 24A moves downward, the step 43 can be moved without being caught on the lower part of the board body 11. ing.

The rear holding member 24B has a front inclined surface 50 provided with the upper surface of the convex portion 41 provided lower toward the front end.
The rear end of the front inclined surface 50 is connected to the rear end of the front inclined surface 50 via the stepped portion 51, and is provided gradually lower toward the rear end to take a substantially symmetrical position with the front inclined surface 41 of the front holding member 24A. It is provided in a shape having a rear inclined surface 52 as a guide portion. Left and right side wall portions 55 of the rear holding member 24B
, A hole 56 is formed at a rear upper position thereof, and a rotation support shaft 57 is inserted through the hole 56. And
Since the rotation support shaft 57 is supported by the hole 35 formed in the rear side wing portion 34 of the support plate 28, the inside of the rear holding member 24, that is, the protrusion 41 side can be vertically rotated as a free end. ing. The free end side of the side wall portion 55 has an elliptical hole 4 provided in the front holding member 24A.
An oval hole 59 is formed inside the shaft 8, and the shaft 49 is provided in the oval hole 59 so as to be freely inserted. In addition,
The step portion 51 is provided on an arc surface centered on the hole 56, and when the free end side of the rear holding member 24B moves downward, the step portion 51 can move without being caught on the lower portion of the board body 11. .

Front holding member 24A and rear holding member 24
In B, around the rotation support shafts 47 and 57, a spring 60 constituting a control device together with a lever described later is wound and supported, respectively. One end of the spring 60 contacts the upper inner surface of each of the holding members 24A and 24B, while the other end is arranged to engage with a small hole 37 formed in the support plate 28, whereby the front holding member 24A
And a position where the free end side of the rear holding member 24B is urged upward, and as shown in FIG. 6, the outer edge portion of the board main body 11 is sandwiched from the front and rear to be a first position to be engaged therewith. It has become.

The control device 25 includes the spring 60 and the lever 65. This lever 65 is shown in FIG.
As shown in FIG.
And a pair of left and right bent arm portions 67 connected to both ends of the grip portion 66. The lever 65 has a substantially crank shape in a side view and a substantially U-shaped appearance in a plan view. Here, a hole 68 that opens in a semicircular arc shape is formed on the same axis at the base of each bent arm portion 67, while each end of the shaft 49 is received on the lower surface on the distal end side to receive the shaft 49. The upper bearing recess 70 is formed. The common shaft 72 is inserted into the hole 68 in a state where the hole 68 is coaxially combined with the shaft insertion hole 39 of the support plate 28 constituting the base 23. At this time, the fixed area at the end of the common shaft 72 is
When the grip 66 of the lever 65 is pulled upward, the distal end side of the bent arm 67 can be rotated clockwise in FIG. 49 is lowered to the second position where the free end side of each of the holding members 24A and 24B is lowered, whereby the rotation of the board body 11 is allowed and at the same time, the common shaft 72 moves in the circumferential direction. It is designed to rotate.

The locking devices 13 are connected to each other via the common shaft 72. Therefore, by operating the lever 65 of any one of the locking devices 13, the other locking device 13 can be synchronously operated. Becomes Here, as shown in FIG. 1, the common shaft 72 extends through the hollow portion 73A of the powder receiving tray 73 supported by the connecting bar 20.

The cover 26 has a pair of left and right lateral cover walls 75, which are substantially trapezoidal in a side view and is located on both left and right sides of the holding member 24. A front cover wall 76 located above the portion,
Hanging from the lower rear part of the horizontal cover wall 75,
And a hook wall 77 located on the back side of the main body.

Next, the operation of the lock device 13 according to this embodiment will be described with reference to FIG.

Now, it is assumed that the inner side of each of the holding members 24A, 25A, that is, the free end side is at the first position,
It is assumed that the outer edge portion of the board body 11 is sandwiched between the front and rear portions 51 and the board body 11 is kept in a substantially vertical posture and cannot be rotated. Here, when the board body 11 is rotated, first, the grip portion 66 of the lever 65 may be slightly lifted upward.

Then, the lever 65 rotates about the position of the common shaft 72 as a fulcrum, and at the same time, lowers the distal end position of the bending arm 67. Thereby, the bearing recess 7 formed on the lower surface side of the bending arm portion 67
The shaft 49 that is engaged with the shaft 0 descends along the slot hole 36 of the support plate 28 against the urging force of the spring 60, and the free end sides of the holding members 24A and 25A move toward the second position. As shown in FIG. 7, when each of the holding members 24A and 24B is displaced to a position where the position for holding the outer edge of the board body 11 is released, rotation of the board body 11 is permitted. Becomes

After the rotation of the board body 11 has started, the lifting force on the lever 65 can be released.
Then, the front holding member 24A and the rear holding member 24B are
It returns to the first position by receiving the urging force of the spring 60. In this state, when the outer edge portion of the board main body 11 comes into a position where the outer edge portion is engaged again, the outer edge portion comes into contact with the front inclined surface 42 or the rear inclined surface 52, and thus the push-down force accompanying this contact is received. The free end side of one of the holding members is lowered. At this time, the shaft 49 is fitted with the above-described elliptical hole 48,
Since the holding member is loosely inserted into the holding member 59, the holding member that does not receive the pushing force keeps the first position, and prevents the outer edge portion from entering the re-engaging position. At the mating position, the holding member that has temporarily dropped due to the pressing force returns to the first position and holds the outer edge portion.

Thereafter, by the same operation, the rotation of the board main body 11 and the rotation control can be performed as necessary.

In the above embodiment, the board main body 11 is constituted by a white board. However, the present invention is not limited to this, and may be used for posting various documents such as public information and advertisement. The same applies to a board having a bulletin board.

Although the lock devices 13 are arranged at two positions, at least one lock device may be arranged, and three or more lock devices may be arranged as necessary. Further, the position of the lock device 13 is not limited to the case along the lower outer edge of the board body 11 but also includes the case along the left or right side edge.

Further, in the above-described embodiment, the configuration in which the holding member 24 can be displaced to the second position by pulling up the lever 65 has been illustrated and described, but the present invention is not necessarily limited to this. For example, by changing the shape of the elliptical holes 48 and 59 in the above-described holding members 24A and 24B and the position of the rotation fulcrum of the lever 65 and pushing down the lever 65, the holding member 24 can be displaced to the second position. It may be configured. According to this, the direction in which the holding member 24 is displaced and the operation direction of the lever 65 coincide.

[0033]

As described above, according to the present invention,
A guide portion for holding the holding member at the first position at all times and allowing the rotation toward the second position by being pressed by the outer edge portion when the engagement by the holding members is released and re-engaged; With this configuration, the board can be re-engaged between the sandwiching members even when the board body is rotated in any of the front and rear directions, and an effect of providing a rotating board posture control device excellent in operability can be provided. Get.

The control means comprises a spring for urging the holding member to the first position, and a lever for displacing the holding member to the second position against the urging force of the spring. Therefore, the holding member always receives a force for returning to the engagement position, and the board body can be held in a constant posture unless the lever is rotated.

Further, since the holding members are provided so as to be rotatable at the same time via shafts penetrating the free ends thereof, a simple structure in which one holding member is shared and each holding member is rotated simultaneously is provided. Can be achieved.

Further, since the lever is rotatably supported by the base and one end of the lever is engaged with the shaft, the position for operating the lever and the position for the holding member are very close to each other. Thus, the position of the holding member can be displaced without requiring a large operation force, and the operation force can be reduced.

Further, in the configuration in which a plurality of the lock devices are provided and connected to each other by a common shaft, the operation of one lock device extends to the other lock device, and the operation of each lock device is not required. can do. Therefore,
While a stable posture can be maintained in the case where the board body is of a large size, the operation when the board is turned upside down can be easily performed.

When the common shaft is arranged so as to penetrate the powder receiving tray mounted on the frame, the presence of the common shaft is hidden by the powder receiving tray, so that the appearance of the common shaft can be ensured. can do.

[Brief description of the drawings]

FIG. 1 is a front view of a rotating blackboard to which the present invention has been applied.

FIG. 2 is a right side view of FIG.

FIG. 3 is a schematic perspective view of a lock device according to the embodiment.

FIG. 4 is a schematic perspective view in which a part of the lock device except for a cover is cut away.

FIG. 5 is an exploded perspective view of FIG. 3;

FIG. 6 is a partial sectional view showing an engagement state between the lock device and the rotating board.

FIG. 7 is a partial cross-sectional view showing a state in which engagement between the lock device and the rotating board is released.

[Explanation of symbols]

 Reference Signs List 10 rotating blackboard 11 board main body 12 frame 13 locking device 23 base 24 holding member 24A front holding member 24B rear holding member 25 control means 42 front inclined surface (guide portion) 49 axis 52 rear inclined surface (guide portion) 59 oval hole 60 Spring (control means) 65 Lever (control means) 72 Common axis

Claims (7)

(57) [Claims] 1. A board mounted on a frame rotatably supporting a board body provided with a writing surface or a posting surface, and engaged with an outer edge portion of the board body to restrict the rotation of the board body, and In a posture control device for a rotating board provided with a locking device that allows the rotation of the board body by releasing the combination, the locking device is a base fixed to the frame, and rotatably supported by the base, A first position for sandwiching the outer edge portion from front and rear and engaging with the same, and a pair of front and rear holding members movably provided from the first position to a second position for releasing the engagement; Control means for controlling the position of the holding member. The holding member is always held at the first position, and when the engagement by the holding members is released and re-engaged, Clamping member of the attitude control device of the rotary board, characterized in that the other clamping member while maintaining the first position displaced to the second position by being pressed by the outer edge portion. 2. The control means comprises a spring for urging the holding member to a first position, and a lever for displacing the holding member to a second position against the urging force of the spring. The attitude control device for a rotating board according to claim 1, wherein 3. The holding member is made of a block body that is rotatably combined without interfering with each other,
The attitude control device for a rotary board according to claim 1 or 2, wherein the rotary board is provided so as to be rotatable at the same time via a shaft passing through a hole provided on an inner free end side of each block body. 4. The hole is an elliptical hole larger than the diameter of the shaft, and when the holding member is pressed by the outer edge portion, only the holding member receiving the pressing force is displaced to the second position. The attitude control device for a rotating board according to claim 2 or 3, wherein the attitude control apparatus is provided so as to be capable of being provided. 5. The lever according to claim 2, wherein an intermediate portion is rotatably supported by the base, and one end of the lever is engaged with the shaft, and the other end protrudes forward of the base. The attitude control device for a rotating board according to claim 3 or 4. 6. The lock device is provided at a plurality of locations on the same line along the outer edge of the board body, and each of these lock devices is provided so as to be simultaneously controllable via a common shaft passing through the lock device. The attitude control device for a rotating board according to any one of claims 1 to 5, characterized in that: 7. The apparatus according to claim 6, wherein the common shaft extends through a powder receiving tray mounted on the frame.