KR0161210B1 - Ascent/descent and opening/shutting blackboard - Google Patents

Abstract

The present invention relates to an elevating opening and closing blackboard that can adjust the writing position in the up and down direction, and the elevating balancing means 50 converts a predetermined elevating purpose into one basic pulley roller and another one in the storage space 32 on both sides. A series of elevating conversion units formed by connecting the pulley rollers to the exercise transmission member is repeatedly formed N times, and the last transforming rollers 53 forming the final elevating conversion unit among the elevating conversion units are gas. (1/2) ^N of the actual moving distance of the lifting object when the gas spring 51 makes an available stroke when the gas spring 51 reacts with the vertical stretching action of the gas spring 51 by being installed at one end of the rod of the spring 51. It has the function of adjusting to double the ship, so that only a small part of the entire stroke of the gas spring can be used to lift and lift the board without effort. All.

In addition, the lifting balance means can be simply installed into the storage space formed on the back of the auxiliary member to produce and distribute a packaged and compact product, and in particular, the installation becomes simple.

Description

Elevation opening and closing blackboard

1 to 8 show an embodiment of the present invention,

1 is a partially cutaway front view showing a state where the lifting balance means and the positioning means are installed.

2 is an exploded view showing a state in which the auxiliary member of the present invention is disassembled.

3 is a main diagram showing the elevation of the lifting object.

4 is a main diagram showing a state where the elevation object is lowered.

5 is a main part diagram showing a conceptual configuration of the lifting balance means.

6 is a partial front view showing the positioning means of the lifting object.

7 is a bottom view showing the operating state of the positioning means by the lever.

8 is a cross-sectional view of the main portion of FIG.

* Explanation of symbols for the main parts of the drawings

10: main blackboard 20: frame body

30: auxiliary member 40: lifting guide means

50: lifting balance means 51: gas spring

53, 55: 1st, 2nd conversion roller 56, 57: basic pulley roller

54, 58: first and second motion transfer member 150: positioning means

The present invention relates to an elevating blackboard having a variety of opening and closing blackboards that can be moved left and right by a rail or rotate about one pivotal axis, and which can adjust the writing position in the vertical direction. According to the user's needs, the center frame body attached to the main board (hereinafter referred to as "elevation object"), which can be actually lifted up and down by a predetermined distance, is required by the user using a cylinder-type gas spring with a short stroke. It relates to a lift opening and closing blackboard to be adjusted to the position to the lifting height. The opening and closing blackboard is a kind of auxiliary education member, and is divided into a sliding type pivoting about one point by a sliding type, a hinge, etc., which is linearly moved left and right like a rail type based on its operation state. Point and open the blackboard.

Conventionally, the main object board used for writing is divided into auxiliary members (or bulletin boards) positioned at the borders on both sides thereof, and the weight of the lifting object obtained by combining the main board and the center frame supporting the main board. It has been proposed to equip the balance weights to achieve the same weight balance as the lifting balance means.

The prior art of the elevating blackboard is a tall or short user who directly elevates the elevating object located in the center in the up and down direction as needed, compared to a stationary blackboard where the writing position is immutable. Even if the writing position can be freely adjusted or used as an auxiliary backdrop for using the OHP mechanism, the position of the lifting object can be adjusted up and down according to the necessity of adjusting the irradiation angle and the irradiation distance. In other words, it is intended to enjoy a commercial effect.

However, this prior art has been composed of the moment of the force by the ascending of the moving distance of the balance weight and the wire rope, the basic lifting means are heavy.

Therefore, the total weight of the lifting object is borne by 1/2 each of two opposing counterweights located in the storage space behind the auxiliary member (bulletin board), so as to be balanced with the lifting object, so that the total weight becomes more than necessary. It has caused a lot of inconvenience during manufacturing, moving, and installation work.

Moreover, when converting a lifting object to a predetermined position, there is a concern that the life of the mechanism itself can be shortened by reacting the stop energy generated at the stop point to each component of the lifting means.

The present invention is provided to solve the drawbacks of the prior art of the elevating board, the gas spring having a compressive load of several times the range of the lifting object is reduced to the inherent stroke of the gas spring By linking the elevating conversion means to configure the elevating balance means to move the elevating object as much as desired movement distance while using only a small part of the unique stroke of the gas spring, the installation is made in a small storage space In addition, it is to provide an elevating opening and closing blackboard that can move the lifting object easily without flow even by applying a very small external force.

As is well known, the gas spring generates a force by the gas [given nitrogen (N) gas] compressed to a predetermined pressure in the cylinder, and the rod of the gas spring is moved outside by the pressure of the compressed nitrogen gas. It is a constant velocity linear body that applies the phenomenon of being pushed in the direction.

Therefore, when adopting only such a gas spring as the lifting balance means, as a result, the specifications of the gas spring must be in the equilibrium condition of 1: 1 with the lifting conditions (for example, weight and moving distance) of the lifting object. In order to move the target object by a predetermined distance, the lifting balance means (or gas spring) was also required to perform the equivalent stroke. Therefore, from the embodiment of the present invention, the maximum extension deviation of the elders and the single person is set to 600m / m, the stroke of the gas spring should also be 600m / m in this case the maximum travel distance of the lifting object, and in this case Only when the entire stroke has been consumed is it possible to make the transition by the maximum travel distance of the lifting object.

Therefore, when the rod is compressed, it is inconvenient to require more force in proportion to the contraction length of the rod in order to move the lifting object due to the characteristic of the gas spring having the compression ratio gradually increasing from the start point to the end point of the stroke. Was followed.

In other words, the compression ratio coefficient generated from the start point of the stroke (completely loaded) to the end point of the stroke (completely retracted) is 1.3 and there is a 30% difference in load between the starting and ending points. As the board users must bear the increase of these loads in the movement, the necessity to reduce the burden of the loads becomes practical.

In addition, assuming that the lifting object having a large moving distance as in the embodiment of the present invention is elevated by using a gas spring having an equilibrium condition of 1: 1, the length of the gas spring fully extended is 2 of the total stroke. It becomes a length exceeding a ship (for example, 1300 m / m), which is beyond the height of a conventional blackboard (1200 m / m), making it impossible to install the elevating balancing means in the inner space of the elevating blackboard.

Needless to say, exposing the lift balancing means to the outside will expose the vulnerabilities to the surrounding environmental conditions, and since it occupies a separate installation space, it will interfere with the installations around the blackboard. It may occur, and it is not beautiful in appearance, resulting in defects such as deterioration of commerciality.

It is an object of the present invention to provide an elevating opening and closing blackboard which can move an elevating object in an up and down direction with a uniform and small force regardless of the pressure ratio (K = 1.3) of the gas spring.

Another object of the present invention is to provide an elevating opening and closing blackboard to achieve an elevating balancing means using a gas spring having a stroke smaller than the maximum moving distance of the elevating object.

Still another object of the present invention is to provide a lift opening / closing blackboard that can be manufactured and distributed in a compact state by mounting a lift balance means made of a gas spring in a storage space of a blackboard.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a main blackboard 10 installed toward the front of the lecture room and the like, an auxiliary member 30 for shielding the storage space 32 provided on both sides of the main blackboard 10, and a predetermined one of the components Elevation guide means 40 for moving the elevating object up and down of the lifting object, and elevating balance means 50 for elevating the elevating object to the predetermined position by the elevating guide means 40 to maintain its position In the elevating opening / closing blackboard, the elevating balancing means 50 is an elevating device formed by connecting one basic pulley roller and another conversion pulley roller with an exercise transmission member in the storage spaces 32 on both sides of the lifting object. The final conversion pulley roller 53, which constitutes the last lifting lift conversion unit among the lifting conversion units, is repeatedly formed in series and repeated N times, and the gas spring 51 is loaded. (5 2) installed at one end so that the available stroke of the gas spring 51 can be reduced by (1/2) ^N times the actual travel distance of the lifting object when the gas spring 51 reacts with the vertical axis action of the gas spring 51; It is characterized by being configured.

Where N is a natural number (1, 2, ...) representing the number of times of the lifting conversion unit, that is, the number of strokes of the movement conversion.

In the configuration of the present invention, the lifting object is made to include the main frame 10, or the center frame 21 to which the main board 10 is attached.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In addition, in the exemplary embodiment of the present invention, even when the main blackboard 10 is moved to a predetermined lifting height, the gas spring 51 may be configured by a configuration (a pulley configuration) of two steps (or two). An operation example in which only a stroke corresponding to a quarter of the length is operated is described. As a result, the lifting balance means 50 using the pulley roller in the storage space 32 formed in a size limited to the rear side of the auxiliary member 30 is described. It is possible to produce and distribute packaged products by storing them.

1 shows a state in which the lifting balance means 50 are installed in the storage space 32 behind the auxiliary member 30 located at both sides of the main blackboard 10 including the frame part 20.

In order to elevate the lifting balance means 50 integrally with the lifting object in the present invention, as shown in FIG. 1, the body of the gas spring 51 is fixed to an inner end of the side frame body 22, The rod 52 is installed so that the tip end can be freely moved up and down.

The elevating balancing means 50 may be provided only at any one of the storage spaces 32, but a plurality of elevating balancing means 50 are provided on each side so that the weight of the elevating object can be divided by half, so as to balance on both sides. It is preferable to install symmetrically.

In the former case, since the weight of the lifting object is concentrated in one place, the internal compression load of the gas spring 51 should be about 2N times the weight of the lifting object. In this case, the internal compression load of the gas spring 51 is required to use a size corresponding to N times the weight of the lifting object.

In the storage space 32 of the elevating balancing means 50, the slide member 42 is guided to the post 41 at the boundary adjacent to the center frame 21 and the side frame 22 to move up and down. By installing the elevating guide means 40 made so that the lifting object moves smoothly and linearly, in this case, it is necessary to install a predetermined lubrication member inside the slide member 42 to minimize the friction coefficient during the lifting. desirable.

As the lubricating member, a slide bearing, a linear bearing, or the like provided inside the slide member 42 is suitable.

In the elevating balance means 50, the first and second basic pull rollers 57 and 56 are installed on the side frame body 22 in a fixed state, and the first and second conversion pulley rollers 55 and ( 53 is installed in the shank east state in the storage space (32). The lifting conversion unit of the first turn (or the first step) is composed of a first basic pulley roller 57, a first transformed pulley roller 55, and a first motion transmitting member 58. Step 2) the lifting conversion unit is composed of a second basic pulley roller 56, the second end of the pulley roller 53 and the second motion transfer member (54).

One end of the second movement transmitting member 54 is fixed on the side frame body 22, and the other end of the second movement transmitting member 54 passes through the second conversion pulley roller 53 and the lower side basic pulley roller 56. The roller 55 is integrally connected to the lower portion of the shaft support member 59.

The second conversion pulley roller 53 is rotatably installed at the end of the rod 52 of the gas spring 51 so that the first conversion pulley roller 55 doubles as the gas spring 51 moves up and down. It is to be installed to move with distance.

The first movement transmitting member 58 is a slide member of the elevating guide means 40 via the first conversion pulley roller 55 and the first basic pulley roller 57 in a state of being fixed to the upper end of the side frame body 22. It is fixed at 42.

In addition, the slide member 42 may be moved up and down at a stroke distance corresponding to twice the moving distance of the first conversion pulley roller 55, and the slide member 42 is moved to the main blackboard 10. Since the main blackboard 10 is fixedly installed is to be moved up and down by a double stroke of the first conversion pulley roller 55. Assuming that the diameters of the pulley rollers are the same, comparing the rotational ratios, when the rotational ratio of the first basic pulley roller 57 is 1, the rotation ratio of the first conversion pulley roller and the second basic pulley roller 56 is The rotation ratio of 1/2 and the 2nd conversion pulley roller 53 becomes 1/4.

Therefore, when the moving distance of the gas spring 51 is 1, the main board 10, which is the lifting object, is moved at a distance of four times.

Considering these values, when the lifting height of the main blackboard 10 is set to 600 m / m, since the actual stroke of the gas spring 51 is 600/4 = 150 m / m, the gas having a stroke of at least 150 m / m or more in theory. Although the spring 51 may be selected and used, it is better to select a gas spring having a larger stroke in practice.

The reason for this is that, as described above, one of the most important objects of the present invention is to use only a small part of the stroke of the entire stroke of the gas spring.

This will be described again with respect to the expansion and contraction action of the gas spring, in general, as the rod of the gas spring is gradually contracted by the external force, the reaction force is gradually increased due to the increase in the pressure ratio.

Therefore, in the technical configuration that consumes the entire stroke of the gas spring, the user has to bear the total weight of the external force according to the total pressure ratio (K = 1.3) of the gas spring. There is no choice but to lift it. Therefore, the use of gas springs with larger strokes to increase the stroke length of the lifting conversion units to increase the stroke length, so that the stroke of the gas springs can be further reduced. There will be.

On the other hand, the elevating opening and closing blackboard according to the present invention includes a positioning means 150 for fixing the lifting position of the main blackboard 10 to match the position of the auxiliary member (30).

The positioning means 150 includes a support plate 151 attached to the center frame 21, a lever 152 hingedly coupled to the support plate 151, and a lever 153. And a pair of rod members 155 coupled to the coupling element 154 so that the lever 152 extends to the boundary position of the side frame body 22 and rotates symmetrically in accordance with the rotational operation, both ends of the rod members 155. A link member 156 having one end hinged to link the center pin 158 of the support 157 to an axis, a lock pin 160 hinged to the other end of the link member 156, and the lock pin. Spring 159 for elastically supporting the 160 and the height of the auxiliary member 30 and the main blackboard 10 so that the lock pin 160 is caught, or a predetermined interval at the top and bottom of this position It consists of a vertical frame 170 formed in multiple stages of the engaging holes 171, 172, 173, respectively.

The frame part 20 is located in front of the school and classroom, etc. to fix the main blackboard 10 and the auxiliary member 30 therein, or to support the movement to guide the frame body, the frame part 20 The main frame 10 is fixed to the main board 10 in the center of the center frame body 21 to support the upper and lower sides, and the side frame body for supporting various auxiliary members 30 for auxiliary education on both sides of the center frame body 21 ( 22), and separated from the boundary, the center frame 21 is installed so as to be able to move up and down.

On both sides of the main blackboard 10, as shown in FIG. 8, various auxiliary members fixed to or supported by the side frame body 22 are located.

The position changeable auxiliary member, also called an open / close blackboard, refers to a slide auxiliary member 30b that slides from side to side.

As shown in FIG. 8, the rails 13 are provided in the center frame 21 and the side frame body 22 so that the slide assisting member 30b can be moved in parallel while being positioned at both sides of the main blackboard 10. Will be installed.

Accordingly, the slide auxiliary members 30b can be moved horizontally from the side frame body 22 fixed to both front sides of the lecture room toward the main blackboard 10, and the center frame body positioned between the side frame bodies 22. 21 is installed to be able to move up and down by the elevating guide means 40 when necessary.

Then, the positioning means 150 is installed as a means for matching the height of the center frame body 21 and the side frame body 22 when the slide auxiliary member (30b) is sliding to the front surface of the main blackboard (10). .

Therefore, the slide auxiliary member 30b is operated to slide along the ray so that the slide assisting member 30b can be trained at the optimum training position.

That is, the main blackboard 10 can be used by elevating it to a desired height according to the user's physical condition (key height), and the slide auxiliary member 30b provided at both sides of the main blackboard 10 as necessary in the course of lectures is centered. When moving to use, the position of the center frame body 21 and the side frame body 22 is to be fixed by the positioning means 150 in the state of matching the rail level.

As a result, the slide assisting member 30b can move toward the center while orbitally moving along the rail surface. A fixed auxiliary member 30a is disposed in front of the slide auxiliary member 30b. The auxiliary member 30a may be used as a memo bulletin board or the like, or may be simply used as a shielding means that covers the storage space 32.

The configuration of this positioning means 150 is shown in detail in FIGS. 6 to 7.

According to FIG. 6, the lever 152 is installed in a state where the user's hand is easily accessible to the lower side of the center frame 21 in a state where the lever 152 is exposed to the outside, and the lever 152 is rotated to both sides. Lock pin 160 has been shown to be caught in the engaging holes 171, 172 (173) to be fixed by changing the position of the main blackboard 10 over multiple stages.

At this time, the lever 152 is coupled to the support plate 151 on the approximately center side of the center frame 21, the center frame 21 is a hollow cross-section of the channel-shaped synthetic resin and aluminum extrusions into the shaft pin ( 153 is positioned in connection with the lever 152, the rod member 155 is extended in the longitudinal direction of the center frame body to be installed to the approximately boundary position of the side frame body 112.

Then, the shaft pin 153 and the rod member 155 by the coupling element 154 for the stretching operation that the rod member 155 is symmetrically spread outwardly or contracts inwardly by the rotation of the lever 152. Hinged.

3 illustrates, as an embodiment of this coupling element 154, hinge coupling the rod member 155 and the shaft pin 153 with the pin 154a.

Therefore, according to this configuration, when the lever 152 is rotated, the pin 153 connected to the lever 152 is rotated together, and the pins 154a for coupling the rod members 155 on both sides are moved. The pair of rod members 155 are symmetrically operated at a tangential distance corresponding to the position movement distance.

Both ends of the rod member 155 are hinged to the link member 156 which links the center pin 158 of the support 157 to the axis.

In addition, the lock pin 160 is hinged to the other end of the link member 156 while being elastically supported by the spring 159.

Therefore, when the rod member 155 linearly symmetrically rotates by the rotation of the lever 152, the link member 156 hinged to the distal end of the rod member 155 performs a link movement such as a seesaw. As a result, the lock pin 160 is engaged with the locking holes 171, 172, 173 formed in the vertical frame 170, or is operated to release the locking.

The vertical frame 170 is installed to the rear of the auxiliary member 30 is configured so that the appearance of the link member 156 and the lock pin 160 is not observed from the outside.

In addition, the locking hole 172 formed at an intermediate position among the locking holes 171, 172 and 173 formed in multiple stages in the vertical frame 170 has the height of the main blackboard 10 and the auxiliary member again. In other words, the rail frame of the center frame body 21 and the side frame body 22 is designed to be the same, and the auxiliary member 30b to be slid is horizontally moved to the front surface position of the main board 10 so as to be used.

In addition to the locking hole 172 at the point where the height of the main blackboard 10 and the auxiliary member 30 coincide with each other, the other locking holes 171 and 173 are formed at a predetermined distance from the upper side and the lower side. By locking the locking pins 160 to the locking holes 171 and 173, the slide auxiliary member 30b is first horizontally moved to the front surface of the main board 10 to be horizontally overlapped, and the vertical direction is increased. The secondary member can be moved back to the desired position and used in the desired position.

According to the experiment, it was found that the interval between the engaging holes 171, 172, 173 is about 30 cm.

On the other hand, when the lock pin 160 is released from the locking holes 171, 172, 173 by the rotation of the lever 152, the lifting and lowering of the main blackboard 10 is free, and the locking pin 160 is locked. The guide frame 170a is moved to the vertical frame 170 in a state where the end of the lock pin 160 is fitted in the vertical frame 170 to prevent the elevator from being lifted from the locking position of the (171), 172, and 173. It is formed to extend in the vertical direction over the engaging holes (171, 172, 173).

As such, when the lock pin 160 is fitted to the positions of the engaging holes 171, 172, 173, the main board 10 is not lifted or moved up and down, thereby fixing the position.

On the other hand, the main blackboard 10 is divided into a planar shape and a curved shape that is formed to be concave in the center, the shape of the elevating positioning device according to the present invention may be selected in any form. However, the curved surface type is preferred in terms of the reduction effect of the visual fatigue of the trainees.

As described above, the present invention is configured to mount the single or plural gas springs to the elevating object as an alternative, and to integrally rotate the same, so that the number of components can be greatly reduced, and the constant velocity movement The operation can be made quietly.

In addition, even a gas spring having a small size and a small stroke can maintain a large load and balance, and since the stop energy is not recoiled to the main body at the time of stopping after the lifting operation, the lifting device can not be damaged.

In addition, the elevating balance means can be simply installed into the storage space formed inside the auxiliary member, so that a packaged and compact product can be produced and distributed, and in particular, the installation becomes simple.

In addition, according to the present invention, the operation of matching the height of the slide assisting member 30b installed on both sides of the central blackboard and the two sides can be done quickly and accurately in one operation.

Therefore, when the video education using O.H.P, etc., it is necessary to adjust the position of the slide auxiliary member (ie sliding sliding door) up, down, left and right corresponding to the position of O.H.P. The slide auxiliary member is temporarily raised and lowered in the range of the lifting object only by positioning the slide auxiliary member for image education in front of the main board while keeping the level of the rail surface smooth by raising and lowering the lifting object. It is included to be able to adjust the position in the vertical or horizontal direction.

In addition, including the positions where the heights of the main blackboard 10 and the slide auxiliary member 30b coincide with each other, the main blackboard 10 may be fixed in a multi-stage detachable position in an elevated height or a lowered state, respectively. It is such a very useful invention.

Claims (2)

An auxiliary member 30 for shielding the main blackboard 10 installed toward the front of the lecture room or the like, the storage space 32 provided on both sides of the main blackboard 10, and a predetermined lifting object among the components. The elevating board 40 having elevating guide means 40 for elevating and moving up and down, and elevating balancing means 50 for elevating and elevating the elevating object to a predetermined position by the elevating guide means 40. In the above, the elevating balancing means 50 is repeatedly connected to the elevating conversion unit formed by connecting the basic pulley roller and the conversion pulley roller to the motion transfer member in the storage space 32 on both sides of the lifting object repeatedly over N times. And a final conversion pulley roller 53 constituting the last conversion lifting unit among the lifting conversion units is provided at one end of the rod 52 of the gas spring 51 to Who act shaft and elevating opening and closing the board, characterized by being configured to adjust the available stroke is (1/2) ^N-fold reduction of the desired product a lifting of the actual movement distance of the gas spring 51 when the responsive. (N is elevated The number of components of the conversion unit, that is, the natural number representing the number of motion conversions) The elevating opening and closing blackboard according to claim 1, wherein the gas spring (51) uses nitrogen gas as a compressible fluid.