JP3515929B2 - Elevating blackboard device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifting / lowering device for a lifting / lowering blackboard which is lifted / lowered by a motor.

[0002]

2. Description of the Related Art Conventionally, there have been lifting and lowering devices for lifting and lowering blackboards that are lifted and lowered by a motor. However, conventional lifting and lowering blackboards are relatively small due to chain and rope tension. The reality is that the lifting black-and-white board device has not been adopted yet.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to propose an elevating blackboard device capable of smoothly elevating even a large elevating blackboard.

[0004]

In order to solve the above-mentioned problems, in the invention according to claim 1, reference numerals are given to the supporting frame 2 attached to the installation wall surface 1, and the lifting frame 3 is attached. In an elevating and lowering blackboard device in which an elevating and lowering blackboard 4 is attached so as to be vertically movable via an elongate blackboard 4, a long hollow rotary shaft 5 extending in a lateral direction is rotatably supported by a support frame 2 and The motor M is housed in the hollow portion 6 on the one end side, and among the motor main body 7 and the motor shaft 8 constituting the motor M, the motor main body 7 is integrally fixed to the long hollow rotary shaft 5, and the motor shaft 8 Are integrally fixed to the support frame 2, and the long hollow rotary shaft 5 fixed to the motor body 7 is rotationally driven with the motor shaft 8 fixed to the support frame 2 as a fixed shaft. Winding drum at appropriate intervals in the longitudinal direction of the hollow shaft 5 9 is provided between these winding drum 9 and the elevating frame 3, one end portion 10a is the winding drum 9
Ri Na other end portion 10b is respectively fixed winding belt 10 is interposed under bar 11 of the lifting frame 3, the elevator board 4 is integrally
The upper and lower bars 3 are attached to the elevating frame 3 mounted on the
A pair of left and right guide rods 13, 13
And a pair of left and right linear bearings 1 in parallel
4 and 14, one of the bearing members 14a is attached.
The pair of left and right guide rods 13,
The guide hole 15 through which 13 is inserted and the left and right linear bearings
The other engaging with one bearing member 14a of the ring 14
And a bearing member 14b of
13 and 13 and guide holes 15 and 15 through which this is inserted
And the bearing members 14a and 14b are engaged with each other.
The elevating frame 3 with the linear bearings 14 and 14
Is constructed so that it can be lifted and lowered by the support frame 2 .

According to the second aspect of the present invention, for adjusting the axial support position in the vertical direction of the elongated hollow rotary shaft 5 rotatably supported by the support frame 2 so as to extend in the lateral direction. adjustment means 16 is made of a structure according to claim 1 comprising providing a (FIG. 7).

[0007] In the invention according to claim 3, claim 1 or 2 formed by arranging the obstacle sensing tape switch 18 on the lower surface side of the Kona受17 of the lower end of the lifting board 4 It is composed of.

[0008] In the invention according to claim 4, the motor M as a drive source for raising and lowering the elevator board 4 according to any one of claims 1 to 3, is adapted to be remotely controlled by radio system It is composed of.

[0009]

1 to 3 are a perspective view showing the whole of an elevating blackboard device according to the present invention, a front view and a plan view showing the inside of the elevating blackboard device.

A support frame 2 is attached to an installation wall surface 1 which is an installation position of the elevating blackboard 4, and the elevating blackboard 4 is attached to the supporting frame 2 via an elevating frame 3 which is integrally fixed thereto by a mounting bar 19. It is mounted so that it can be raised and lowered.

The support frame 2 is formed in a frame shape by an upper bar 20 and a lower bar 21 which are long in the horizontal direction, and vertical bars 22 which are relatively short on the left and right sides. A long hollow rotary shaft 5 is rotatably supported in the hollow rotary shaft 5, and a motor M is housed in a hollow portion 6 at one end of the hollow rotary shaft 5. A take-up drum 9 is integrally attached to the long hollow rotary shaft 5 at appropriate intervals in the longitudinal direction, and a tough and thin take-up belt 10 containing a steel wire or the like is wound around the take-up drum 9. As shown in FIGS. 1 and 2, and further as shown in FIG. 5, an obstacle detection tape switch 18 is attached to the lower surface of the powder receiver 17 at the lower end of the lifting blackboard 4, and the back surface of the lifting blackboard 4 is attached. A remote control receiver 23 is built in the side.

[0012] Figure 4 is IV over IV line sectional view of FIG. 2, FIG. 5 2
6 is a sectional view taken along line VV of FIG. 5 and FIG. 6 is a sectional view taken along line VI-VI of FIG. In these drawings, the support frame 2 is attached to the installation wall surface 1 by a support bracket 24 (FIG. 3), and one end of the long hollow rotary shaft 5 axially supported by the support frame 2 in a long direction in the lateral direction. The motor M housed in the side hollow portion 6 is composed of a motor main body 7 and a motor shaft 8, of which the motor main body 7 is integrally fixed to the long hollow rotary shaft 5, and the motor shaft 8 is a vertical shaft of the support frame 2. Fixed bearing 25 provided on the crosspiece 22
Is integrally fixed to. Therefore, the rotation of the motor M causes the long hollow rotary shaft 5 to move to the motor shaft 8 at one end.
And a rotary bearing 26 (pillow block) on the other end side to be rotatably driven. The rotary bearing 26 is of course fixed to the vertical rail 22 of the support frame 2.

A winding drum 9 is integrally fixed to the elongated hollow rotary shaft 5 at appropriate intervals in the longitudinal direction thereof, and one end portion of a winding belt 10 is fixed to the winding drum 9, as shown in FIGS. 5 and 6. 10 a is integrally connected to the take-up drum 9 by a mounting member 27, and the other end 10 b is connected to the lower rail 11 of the elevating frame 3 by a mounting bracket 28.

Therefore, as shown in FIG. 5, the winding belt 1
When 0 is wound up by the winding drum 9 in the direction of arrow a, the elevating blackboard 4 moves up in the direction of arrow A through the support frame 2, and the winding belt 10 extends from the winding drum 9 in the direction of arrow b. Then, the elevating blackboard 4 will descend in the direction of arrow B.

As shown in FIGS. 4, 5 and 2, guide rods 13 are attached to the left and right side portions of the elevating frame 3 so as to extend from the upper bar 12 and the lower bar 11 of the elevating frame 3 to the left and right pair. The guide rods 13, 13 are inserted into the guide holes 15, 15 provided in the upper and lower horizontal rails 20, 21 of the support frame 2. Further, in parallel with the guide rod 13, the lifting frame 3
One bearing member 14a of the linear bearing 14 is attached to both left and right ends of the vertical rail 29 along the left and right vertical rails 29, 29 of the elevating frame 3, and the guide hole 15 is also provided in the support frame 2.
In parallel with this, the other bearing member 14b of the linear bearing 14 is attached along the vertical bar 22 of the support frame 2, whereby the elevating blackboard 4 integrated with the elevating frame 3 includes the guide rod 13 and the guide hole 15. Linear bearing 14 in which both bearing members 14a, 14b engage with each other
It is possible to smoothly move up and down by both of the guide means.

In this case, the guide rod 13 and the guide hole 1 to be inserted into the guide rod 13 are only required for raising and lowering the raising and lowering blackboard 4.
Although the guide means consisting of 5 and 5 is sufficient, as a result of various experiments, when the writing work is performed at the predetermined raising / lowering position of the raising / lowering blackboard 4, the guide rod 13 and the guide hole 15 alone cause vibration and sway. It turned out to be unusable. In addition to the guide rod 13 and the guide hole 15, the linear bearing 14 in which both bearing members 14a and 14b engage with each other
By providing the guide means consisting of, it is possible to prevent vibration and shaking during the writing operation of the elevating blackboard 4 and to use it stably.

[0017] FIG. 7 is a VII chromatography VII line sectional view of FIG.
8 is a sectional view taken along the line VIII-VIII of FIG. 7, in which the installation wall surface 1 is provided by the support bracket 24.
The vertical rails 22 of the support frame 2 attached to the shaft also bear the role of the rotary shaft support frame 30 for rotatably supporting the long hollow rotary shaft 5. That is, as shown in FIG. 2, the rotary shaft support frame 30 is provided at a plurality of positions in the longitudinal direction of the support frame 2, and inside the rotary shaft support frame 30, the idle roller 31 is provided.
And a roller bearing 32 that supports the roller 31, an adjusting bolt 33 and an adjusting nut 34 that adjust the height of the roller bearing 32.
The adjusting means 16 is provided, and the long hollow rotary shaft 5 is mounted on the idler roller 31 and rotatably supported through the rotary shaft support frame 30. In order for the long hollow rotary shaft 5 to rotate smoothly and to be wound up well on the winding drum 9, it is important to adjust the vertical mounting position of the long hollow rotary shaft 5 on the support frame 2. With this adjusting means 16, the upper and lower mounting positions of the long hollow rotary shaft 5 can be easily adjusted.

In use, as shown in FIG. 1, one transmitter 35, which is a remote control means, is operated to receive a signal at the receiver 23 on the lifting blackboard 4 side. 1 rises, for example, by 20 cm from the solid line position shown in FIG. 1 to the upper chain line position, and lowers, for example, 20 cm to the lower chain line position.

When there is an obstacle on the way of lowering the elevating blackboard 4 at the time of lowering, and the lower end face is hit by the obstacle, the obstacle detecting tape switch 18 installed on the lower end face of the powder pan 17 is provided. Is detected to stop the ascending / descending of the ascending / descending blackboard 4, thereby preventing an unexpected accident.

The winding drum 9 and the winding belt 10 provided on the long hollow rotary shaft 5 have a height H of 1.2 m and a horizontal length L shown in FIG. 1, depending on the size of the elevating blackboard 4. If the horizontal length L is 7.2 m, it is attached to two places, and if the horizontal length L is 7.2 m, it is attached to three places. It came to be able to move up and down smoothly.

[0021]

According to the first aspect of the present invention, in an elevator blackboard device in which an elevator blackboard is attached to a support frame attached to an installation wall surface so that the elevator blackboard can be moved up and down through the elevator frame, the support frame is long in the lateral direction. An elongated hollow rotary shaft is rotatably supported, and a motor is housed in the hollow portion on one end side of the elongated hollow rotary shaft. The shaft is integrally fixed to the hollow hollow rotary shaft, the motor shaft is integrally fixed to the support frame, and the motor shaft fixed to the support frame is a fixed shaft,
The long hollow rotary shaft fixed to the motor body is driven to rotate, and a winding drum is provided at an appropriate interval in the longitudinal direction of the long hollow rotary shaft, and between the winding drum and the elevating frame, Since one end is attached to the take-up drum and the other end is attached to the lower rail of the elevating frame, the take-up belt is interposed, so even if the horizontal length of the elevating blackboard becomes long, a long hollow rotating shaft and The elevating blackboard can be smoothly moved up and down by a plurality of take-up drums and take-up belts provided at appropriate intervals in the longitudinal direction, and it is possible to smoothly move up and down even on a horizontally long and long elevating blackboard which has been difficult in the past. It can be easily lifted and used.

Further, since the take-up belt wound on the take-up drum is thin and strong, the total thickness of the lifting blackboard can be made as thin as possible, and the lifting blackboard can be dropped or loosened. It can be used stably over a long period of time.

Further, according to the present invention, a pair of left and right guide rods and one of a pair of left and right linear bearings parallel to the guide rods are provided on the elevating frame to which the elevating blackboard is integrally attached. A bearing member is attached to the support frame, a guide hole through which the pair of left and right guide rods are inserted, and the other bearing member that engages with one of the left and right linear bearings are provided. Since the elevating frame is supported by the support frame so as to be able to ascend and descend by the guide hole through which the elevating frame and the bearings are engaged with each other, the elevating blackboard can be smoothly moved up and down, and also the elevating blackboard can be raised and lowered. Can be used stably without any vibration or shaking on the lifting blackboard when writing on

According to the second aspect of the present invention, there is provided the adjusting means for adjusting the vertical axial support position of the elongated hollow rotary shaft which is rotatably supported by the support frame so as to extend in the horizontal direction. Since it is provided, the upper and lower mounting positions of the long hollow rotary shaft can be easily adjusted, whereby the long hollow rotary shaft can smoothly rotate, and the winding drum and the winding wound around the winding drum can be easily adjusted. The driving state of the take belt can be maintained in a good condition.

According to the third aspect of the present invention, since the obstacle detecting tape switch is provided on the lower surface of the powder receiver at the lower end of the elevating blackboard, obstacles are generated while the elevating blackboard is descending. If there is, the tape switch for detecting obstacles detects it, and stops the raising and lowering of the ascending / descending blackboard to prevent an unexpected accident from occurring.

According to the invention of claim 4 , the motor, which is a drive source for moving up and down the lifting blackboard, is remotely controlled by a wireless system.
It is extremely practical because it is possible to easily raise and lower the lifting blackboard while writing on the lifting blackboard.

[Brief description of drawings]

FIG. 1 is a perspective view showing an entire lifting blackboard device according to the present invention.

FIG. 2 is a front view showing the inside with the lifting blackboard removed.

FIG. 3 is a plan view of the same.

4 is a IV over IV line sectional view of FIG.

5 is a V over V line sectional view of FIG.

6 is a sectional view taken along line VI-VI of FIG.

7 is a VII chromatography VII line sectional view of FIG.

8 is a sectional view taken along line VIII-VIII of FIG.

[Explanation of symbols]

1 installation wall 2 Support frame 3 lifting frame 4 up and down blackboard 5 Long hollow rotating shaft 6 hollow part M motor 7 Motor body 8 motor axes 9 winding drum 10 winding belt 10a One end of winding belt 10b The other end of the winding belt 11 Lower rail of lifting frame 3 12 Upper frame of lifting frame 3 13 Guide rod 14 Linear bearing 14a One bearing member 14b The other bearing member 15 Guide hole 16 Adjustment means 17 Recipes 18 Obstacle Sensing Tape Switch

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B43L 1/04-1/10

Claims (4)

(57) [Claims] 1. An elevating blackboard device in which an elevating blackboard is movably attached to a support frame attached to an installation wall surface via an elevating frame so that a long hollow rotary shaft extending in a lateral direction is rotatable on the supporting frame. The motor is housed in the hollow part of the elongated hollow rotary shaft on the side of one end thereof, and the motor main body is fixed to the elongated hollow rotary shaft integrally with the motor main body constituting the motor. The motor shaft is integrally fixed to the support frame, and the long hollow rotary shaft fixed to the motor body is driven to rotate with the motor shaft fixed to the support frame as a fixed shaft. Winding drums are provided at appropriate intervals in the longitudinal direction of the rotating shaft, and one end is fixed to the winding drum and the other end is fixed to the lower rail of the elevating frame between the winding drums and the elevating frame. Lifting black with a take belt It is a board device , and an elevating blackboard is integrated
The upper and lower frames that are attached to the lifting frame
A pair of left and right guide rods and left and right in parallel with this
The bearing member of one of the pair of linear bearings
And a pair of left and right guide rods attached to the support frame.
Of the guide holes through which the
The other bearing member that engages with one bearing member
Is provided, and the guide rod and the gas through which the guide rod is inserted are provided.
Guide hole and the bearing members that engage with each other.
With the near bearing, the lifting frame can be moved up and down on the support frame.
A lifted blackboard device that is supported. Wherein adjusting means for adjusting the axial supporting position in the vertical direction of the long hollow rotary shaft which is rotatably supported extending to the support frame long in the transverse direction becomes is provided according to claim 1 Lifting blackboard equipment. 3. An obstacle detecting tape switch is provided on the lower surface of the powder receiver at the lower end of the elevating blackboard.
Or the lifting black-and-white board device described in 2 . 4. Motor is a drive source for elevating the elevating blackboard lifting blackboard apparatus according to any one of claims 1-3 adapted to be remotely controlled by the radio system.