KR200176247Y1 - A device for fixing height of blackboard which is shifting vertically - Google Patents

Abstract

The present invention relates to a lifting position fixing device of the elevating board, it is possible to reduce the manufacturing cost by the simple structure, it is convenient to install, and to maintain the original state of the lower plate of the abacus board by maintaining the original state as it is It aims to be able to fix it well.

Lifting position fixing device according to the present invention is connected to the front end of the upper rail 12 and the lower rail 11 of the abacus writing board 1 which can be elevated adjacent to both bulletin boards (2, 2), and is laterally stopped. Both support bars (71, 71) formed with through holes in a direction; A case (76) fixed to one side of each of the supporting rods, a fixed rod (77) having an annular groove (78) installed therethrough in a transverse direction to the case so that one end thereof is moved outwardly from left to right through the through hole of the supporting rod; The stopper 79 is installed to surround the annular groove and the rear end is elastically supported by the first spring 80, the second spring 81 inserted around one side of the fixing rod, and the outside through the front center of the case. Two fasteners (75, 75) having a pushbutton (82) exposed to the rear end and coupled to the front end of the stopper; And two fixing holes 22 and 22 which are sequentially formed in the front vertical members of both bulletin boards to correspond to the through-holes of the supporting rods. In addition, according to the present invention, the fixing holes 23 may be further formed in the bulletin board 2 up and down.

Description

Lifting position fixing device of the board

The present invention relates to a lifting position fixing device of the elevating blackboard, in particular, in the elevating blackboard that can arbitrarily adjust the height of the abacus board, the height of the abacus board can be easily fixed to the height of the subsidiary board It relates to a lifting position fixing device of the elevating blackboard made to be easily pulled out to the side.

Generally, some of the removable blackboards are used as writing tools for lectures, but most of the built-in blackboards have a larger area than the removable blackboards in consideration of the amount of writing. Most of these built-in blackboards are fixed to the wall so that they cannot be adjusted in height. For example, a blackboard with only a writing board attached to the wall, a blackboard with an abacus board and both bulletin boards installed on both sides, and a wall Representative examples include a blackboard having both abacus attached to the abacus attached to the abacus and the abacus attached to the bulletin board respectively installed on both sides of the abacus.

Conventional built-in blackboards made as described above are not made to adjust the height, so if the height of the blackboard does not fit the height of the speaker, the speaker has difficulty in writing as the speaker, and the participants take the written contents well in front of the participants. The effect of education is halved because it is sometimes not seen.

In order to solve these inconveniences, a board that can adjust the height of the writing board has been proposed.These boards include power transmission means such as coil springs, chains and sprockets, pulleys and wire ropes, and throttle plates that adjust the elastic force of the coil springs. Most of those using weights. Representative examples include a blackboard using an up / down moving device of Korean Patent Publication No. 91-9795 and a blackboard using a blackboard height adjusting device of No. 93-4313. However, the above-described conventional blackboards are complicated in structure, difficult to assemble, and expensive. In addition, since the operability for adjusting the height of the writing board is poor, it is not easy to precisely adjust the height of the writing board. Therefore, it is difficult to adjust the height of the writing board, so that the height of the writing board matches the height of the writing board. Sometimes it is difficult to remove the auxiliary board when it is difficult to remove it.

On the other hand, in view of the above problems, the applicant has been filed by the applicant of the Korean Utility Model Registration No. 97-2612 height adjustable built-in blackboard, and the height adjustable built-in blackboard of No. 98-2371. These boards are wound or unwinded by applying the load to the free end in winding state, and the length of the unwinding or unwinding is maintained by the load when the load is removed above the predetermined load. As it is made by using, the height of the writing board is adjusted simply by pulling the writing board up and down, so it has a very convenient structure has the advantage that the height of the abacus board can be adjusted relatively easily and precisely than the blackboards of the prior patent. However, these boards may also need to be repositioned when the board needs to be removed and used when the board is unintentionally pushed up or down. There is a need for a lifting position fixing device capable of fixing the board to the height of the board.

As such a lift position fixing device, a lift positioning device of a lift opening / closing blackboard such as Korean Patent Publication No. 97-10809 has been proposed.

However, such a device has a relatively complicated structure, which not only increases manufacturing costs, but also has a problem in that productivity is degraded due to poor assembly performance due to being installed inside the lower rail of the abacus plate. Furthermore, when the height of the abacus is adjusted, the lower rail of the abacus is deformed due to the fatigue caused by holding the lower rail of the abacus and pushing up or pulling down the abacus. As the distance increases, it is difficult for the abacus board to match the height of the sub board, and the rod member is not inserted into the auxiliary education member even when the lift positioning device is operated. Therefore, the lift positioning device itself becomes useless and even the board Even a phenomenon that cannot be taken out occurs.

The present invention has been made in view of the above problems, and it is possible to improve the productivity by not only lowering the manufacturing cost but also easy to install by the simple structure, and lower rail of the abacus even if the abacus is repeatedly elevated By maintaining the original state as it is, the main plate can be fixed well to the height of the subsidiary board, it is intended to make it easier to withdraw the auxiliary board.

1 is a perspective view showing a blackboard equipped with a lifting position fixing device of the present invention.

2 is a front view showing a part of the lifting structure of the blackboard cut out.

Figure 3 is a partial cross-sectional view showing an example of the lifting structure of the blackboard is installed lifting position fixing device of the present invention.

Figure 4 is a partial cross-sectional view showing a state of releasing from the fixed state the abacus board fixed in accordance with the height by the lifting position fixing device according to the present invention.

5 is a partial cross-sectional view showing a state of fixing the main plate to the height of the auxiliary plate by the lifting position fixing device according to the present invention.

6 is a partially cutaway perspective view illustrating a state in which the auxiliary plate is drawn out while the main plate is aligned with the height of the auxiliary plate by the lifting position fixing device according to the present invention.

7 is a sectional view showing the main parts of another example of the lifting position fixing device according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Abacus 2: Bulletin board

3: auxiliary board 4: guide rod

5: Lifting bushing 6: Static load spring unit

7: lifting position fixing device 22, 23: fixing hole

71: support rod 72: fixed bracket

75: fixture 76: case

77: fixed rod 78: annular groove

79: stopper 80: first spring

81: second spring 82: push button

In order to achieve the above object, the elevating position fixing device of the elevating blackboard according to the present invention, the abacus writing board which is installed to be elevated and has an upper rail and a lower rail, and both bulletin boards installed adjacent to both sides of the abacus writing board; Lifting position fixing device of the elevating blackboard, which is installed on the elevating blackboard comprising both auxiliary boards inserted to be pulled out in the transverse direction to the two bulletin boards to fix the height of the main board to the height of the auxiliary board. To

Two supporting rods adjacent to the two bulletin boards and connected to the front ends of the upper rail and the lower rail of the abacus plate, and through holes are formed in the transverse direction in the middle portion of the stop plate;

The case is fixed to one side of the support bar in which the through hole is located, one end portion is installed to penetrate horizontally to the case so as to move the penetrating hole of the support bar in a horizontal direction, and a fixed rod having an annular groove formed on one side of the outer circumferential surface thereof. A stopper installed while wrapping the annular groove to be detachably attached to the annular groove, and having a rear end resiliently supported by the first spring, a second spring inserted around one side of the fixing rod, and exposed to the outside through the front center of the case; Two fasteners having pushbuttons having a rear end coupled to the front end of the stopper; And,

It characterized in that it comprises two fixing holes which are sequentially formed in the front vertical member of both bulletin boards so as to correspond to the through-holes of the support bar so that the fixing bar is inserted and withdrawn as the fixed bar moves.

A plurality of fixing holes may be further formed on the front vertical members of both bulletin boards in order to fix the abacus writing board at an arbitrary height.

According to the lifting position fixing device of the present invention configured as described above, by raising the height of the abacus writing board to the height of the auxiliary writing board and pressing the right end of the fixing rod constituting the left fixture toward the left bulletin board toward the left bulletin board, the left end of the fixing rod is a through hole of the supporting rod. The main plate may be fixed to the height of the left sub-board by passing through the left side and inserted into the fixing hole formed in the vertical member of the left bulletin board. As such, when the height of the abacus writing board is fixed, the lower rail of the abacus writing board is placed at a position slightly lower than the bottom of the left auxiliary writing board so that the lower rail of the abacus writing board does not interfere when the auxiliary writing board is removed. If the left side board needs to be used while the left side board is removed and used, press the left end of the fixing bar constituting the right fixture toward the right board, and the right end of the fixing bar protrudes out of the through hole of the right support bar, and is formed on the vertical member of the right board. The left side of the main plate is fixed to the height of the right sub plate by being inserted into the fixing hole, and the right sub plate may be removed and used in this state. If you turn the abacus board high or low, push the removed boards back into the boards and press the pushbuttons of the fixtures. As it is inserted into the abacus, the fixing rods do not interfere when the height of the abacus is adjusted by holding the lower rail of the abacus and pushing the abacus up or down.

Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

The lifting position fixing device according to the present invention can be applied to various types of lifting boards. Here, for convenience, the blackboard disclosed in Korean Utility Model Registration Application No. 98-2371 by the present applicant will be described as an example.

As shown in FIG. 1, reference numeral 1 denotes an abacus writing board, and a lower rail 11 protrudes forward so as to place writing supplies such as chalk or a blackboard eraser at the bottom thereof, and an upper end of the abacus writing board 1. The upper rail 12 protrudes forward in correspondence with the lower rail 11.

Reference numeral 2 is a bulletin board 2 having a storage space therein, each of which is installed adjacent to both sides of the abacus writing board 1, and the rear surface is fixed to the wall by conventional fixing means such as bolts. The abacus writing board 1 side of each bulletin board 2 is opened. As shown in FIG. 3, one or two auxiliary boards 3 are inserted into the internal storage space of each bulletin board 2 so as to be able to be drawn out in the longitudinal direction of the main boards 1 through the opening end (here, FIG. 3, As illustrated in FIGS. 6 and 7, the two auxiliary boards 3 are illustrated, so that the auxiliary boards 3 have a lower rail 11 between the lower rails 11 and the upper rails 12. The lower end is supported in the) and can be withdrawn and inserted along the longitudinal direction of the abacus writing plate (1). Although not shown, a lower box may be installed at both lower sides of the bulletin boards to accommodate writing items.

As shown in Figure 2 and 3, in order to be able to raise and lower the abacus writing board 1, the guide rod (4) is vertically installed at the open end of each bulletin board (2) adjacent to the abacus writing board (1) The guide rod 4 is preferably installed at the rear position of the auxiliary board 3, and the upper and lower ends thereof are connected to the upper member 21 and the lower member of the bulletin board 2 through the usual fastening means such as bolts or screws. It is fixed. In addition, the elevating bush 5 is inserted around the guide rod 4 so as to elevate along the guide bar 4, and the first bracket 51 and the second bracket 52 are provided on both sides of the outer circumferential surface of the elevating bush 5. ) Is installed. As shown in FIG. 3, the first bracket 51 may be installed to protrude to the rear of the auxiliary board 3 of the bulletin board 2, and the second bracket 52 may open the opening end of the bulletin board 2. It is installed through the free end is inserted into the insertion groove of the abacus writing board (1) is fixed by a conventional fixing method. And, the reference numeral 6 is a static load spring unit, at least one is installed in the storage space inside each bulletin board (2), the third bracket (63) fixed to the fixing plate 61 of the upper end of the bulletin board (2), The first bracket is fixed to the rotary shaft 64 and the rotary shaft 64 is rotatably wound around the rotary shaft 64 to support the lifting and lowering bush (5) is rotatably installed on the third bracket (63) It comprises a plurality of static load springs (65) fixedly connected to (51). Since the characteristics of the static load springs 65 are well described in Korean Utility Model Registration Application No. 97-2612 filed by the present applicant, the detailed description thereof will be omitted.

As described above, each of the lifting and lowering bushes 5 is connected to the fixed plate 61 by the static load spring unit 6 and the first bracket 51, and both sides of the main plate writing plate 1 are each second bracket 52. Since the elevating bushing 5 is supported by the elevating bush 5, both sides of the abacus writing board 1 are stably supported. Accordingly, when the abacus writing board 1 is pulled down, the pulling force is transmitted to the static load springs 65 through each lifting bush 5 so that the static load springs 65 are unsealed, and the static load springs 65 Each lifting bush (5) is lowered according to the sea area of their, and the abacus writing board (1) can be lowered according to the falling of each lifting bush (5). Pulling up the abacus plate 1, this pulling force is transmitted to the static load springs 65 through each of the lifting bushes 5 so that the static load springs 65 are wound, and the windings of the static load springs 65 As a result, each lifting bush 5 rises, and the abacus writing board 1 may rise as the lifting bush 5 rises.

Meanwhile, according to the present invention, as shown in FIGS. 1 and 3 to 5, the upper rail 12 and the lower rail 11 of the abacus writing plate 1 are adjacent to both bulletin boards 2 and 2. Two support rods 71 and 71 which connect the ends to each other are installed in sequence. Therefore, when drawing out the auxiliary boards 3, the auxiliary boards 3 may be drawn out through a passage between the front surface of the main board 1 and the support rods 71.

The support rod 71 is preferably in the form of a square pipe in order to reduce the load, the through hole is formed in the transverse direction in the middle of the support rod 71. In addition, fixing brackets 72 are respectively installed on the rear surfaces of the supporting rods 71 at positions where the through holes are formed. Each of the fixing brackets 72 preferably protrudes laterally in the opposite direction to each of the bulletin boards 2 from the rear surface of each of the supporting rods 71, and the fixing member 75 is provided on the front surface of the protruding portion of the fixing brackets 72. Is installed. Therefore, the fixture 75 is located next to the support bar (71).

As shown in FIGS. 4 and 5, the fastener path 75 may move horizontally to the case 76 and the case 76 having the rear surface fixed to the protruding portion of the fixing bracket 72. In addition to being installed to penetrate through the fixed rod 77 and the annular groove 78 is formed on one side of the outer circumferential surface, the annular groove 78 is installed so as to be detached from the annular groove 78, the rear end of the first spring (80) A stopper 79 elastically supported by the second spring, a second spring 81 inserted around one side of the fixing bar 77, and exposed to the outside through the front center of the case 76 and the rear end of the One having a pushbutton 82 coupled to the front end of the stopper 79 may be employed.

The rear end of the case 76, as shown in Figure 1, the flange is formed up and down and the flange is fastened to the fixed bracket 72 by the usual fastening means, so that the case 76 to the fixed bracket 72 Can be fixed. The rear surface of the case 76 is preferably made to be opened and closed. An annular flange is formed at an approximately middle portion of the fixed rod 77, one end of the second spring 81 is supported by the annular flange, and the other end of the second spring 81 is supported by the inner wall of the case, thereby providing a fixed rod ( When the second spring 81 is pushed in the direction in which the second spring 81 is installed, the second spring 81 is compressed as the fixed rod 77 moves. The spacer 83 is supported between the stopper 79 on the side opposite to the side where the second spring 81 is installed and the other inner wall surface of the case 76 so that the stopper 79 does not flow when the fixing rod 77 is moved. Can be installed. Spacer 83 is preferably inserted around one side of the fixed rod (77). In order to reliably prevent the left and right flow of the stopper 79, an insertion groove 761 may be further provided on the upper and lower inner wall surfaces of the case 76 to insert the upper and lower ends of the stopper 79. In addition, the stopper 79 surrounds the annular groove 78 by having a notch cut in a U shape toward the front.

According to the fasteners 75 made as described above, for example, in the case of the left fastener 75, the right end of the fastening bar 77 protruding out of the right side of the case 76 is pushed toward the left bulletin board 2 toward the left support bar 71. The left end portion of the fixing bar 77 inserted into the through hole of the bottom side) exits out of the left side of the through hole of the left support bar 71. In the process of moving the fixed bar 77, the second spring 81 is compressed so that the fixed bar 77 is forced in the opposite direction to the moving direction by the elastic force of the second spring 81, but the fixed bar ( The annular groove 78 of the 77 is caught by the notch portion of the stopper 79 that is urged forward by the first spring 80, so that the moving state of the fixing rod 77 can be fixed. In this state, when the pushbutton 82 is pressed, the stopper 79 moves backward while compressing the first spring 80 so that the stopper 79 comes out of the annular groove 78 so that the fixing rod 77 is free. Becomes Therefore, the fixing bar 77 may be returned to its original position by the elastic force of the second spring 81. When the push button 82 is released, the stopper 79 is moved forward by the elastic force of the compressed first spring 80 so that the notch of the stopper 79 contacts the outer circumferential surface of the fixing bar 77.

On the other hand, according to the present invention, the fixing rod 77 is inserted and withdrawn according to the left and right movement of the fixing rod 77 in the middle of the vertical member of each bulletin board (2) corresponding to the through-holes of the supporting rods 71 Fixing holes 22 are provided, respectively. Therefore, when the fixed bar 77 is moved by pressing one end of the fixed bar 77, the other end of the fixed bar 77 is pushed out of the through hole of the support bar 71 and inserted into the fixed hole 22. When the push button 82 is pressed, the other end of the fixing rod 77 inserted into the fixing hole 22 is released from the fixing hole 22 and immersed in the through hole of the supporting rod 71.

Further, according to the present invention, in order to raise and lower the height of the abacus writing board 1 to an arbitrary height, the vertical members of the respective supporting rods 71 and the corresponding bulletin boards 2 are fixed in addition to the fixing holes 22. A plurality of fixing holes 23 may be further formed up and down with the fixing holes 22 interposed therebetween. As shown in Fig. 7, here, it is illustrated that three fixing holes 23, 22, 23 are formed vertically on the front vertical members of the bulletin boards 2, respectively.

Next, the operation of the elevating blackboard provided with the elevating position fixing device 7 according to the present invention configured as described above will be described.

Holding the lower rail 11 of the abacus writing board 1 and lowering or using the abacus writing board 1 down or up as shown in FIG. Height of the board) to the height of the auxiliary board (3).

For example, when the left auxiliary writing board 3 is removed and used, as shown in FIG. 5, when the right end of the fixing bar 77 protruding out of the case 76 of the left fixing member 75 is pressed toward the left bulletin board 2, the fixing bar ( From the state where the left end portion 77 of the support rod 71 is immersed in the through hole, the left end of the through hole extends out of the left side and is inserted into the fixing hole 22 formed in the vertical member of the left bulletin board 2. Therefore, the abacus writing board 1 is fixed to the height of the left auxiliary writing board 3 so that the abacus writing board 1 does not flow up and down, and when the left auxiliary writing board 3 is pulled out in this state, the left auxiliary writing board 3 is abacus. It is guided and drawn out between the upper rail and the lower rail 11 of the abacus writing plate 1 through a passage between the front side of the tablet 1 and the back of the left support bar 71. As the second spring 81 is compressed in the moving process of the fixing bar 77, the fixing bar 77 receives a force in a direction opposite to the moving direction due to the elastic force of the second spring 81. Since the moving state of the fixed rod 77 is fixed by the annular groove 78 of the stopper 79 is locked to the notch of the stopper 79, the insertion state of the fixed rod 77 into the fixing hole 22 can be stably maintained. . In this state, as shown in FIG. 4, when the pushbutton 82 is pressed, the stopper 79 moves backward while compressing the first spring 80, so that the stopper 79 comes out of the annular groove 78. The fixing bar 77 is free, the fixing bar 77 is returned to its original position by the elastic force of the second spring 81, and when the push button 82 is released, the fixing bar 77 is pressed against the elastic force of the compressed first spring 80. As a result, the stopper 79 moves forward again, and the notch of the stopper 79 comes into contact with the outer circumferential surface of the fixing bar 77. Therefore, since the fixed state of the left bulletin board 2 of the abacus writing board 1 is released, the abacus writing board 1 can be elevated. In the case of fixing the abacus writing board 1 by raising and lowering the height of the bulletin board 2 or lower than the height of the bulletin board 2, the fixing bar 77 is operated by operating the fixing tool 75 as described above. Insert it in

On the other hand, when it is necessary to use the right auxiliary writing board 3 while the left auxiliary writing board 3 is removed and used, the left end of the fixing bar 77 constituting the right fastener 75 is formed on the right bulletin board 2 as described above. The right end of the fixing bar 77 protrudes out of the through hole of the right support bar 71 and is inserted into the fixing hole 22 formed in the vertical member of the right bulletin board 2 so that the left side of the abacus writing board 1 is the right auxiliary plate. It is fixed at the height of the tablet 3, and in this state, the right auxiliary boards 3 may be removed and used as shown in FIG. In order to adjust the height of the abacus board again high or low, push the subsidiary boards (3) removed again into the boards (2) and then press the pushbuttons 82 of the fixtures (75) to the board (2) Since the fixing rods 77 inserted into the vertical members of the fixing rods 22 are immersed in the through-holes of the supporting rods 71, the holding rods 77 of the abacus holding plate 1 are held and the abacus writing plate 1 is placed upward. The fixing rods 77 do not interfere when the height of the abacus writing board 1 is adjusted by being pushed up or pulled down.

When the height of the abacus writing board 1 is adjusted, the upper rail 12 and the lower rail 11 are firmly held by both supporting rods 71 even when the abacus holding plate 1 is pushed up or pushed down. Since the lower rail 11 does not flow because the lower rail 11 is prevented from sagging or being deformed, the lower rail 11 maintains its original state, and thus, the abacus writing plate 1 Adjusting the height to the auxiliary plate 3 can be easily and precisely matched.

According to the lifting position fixing device according to the present invention configured as described above, each of the supporting rods 71 in order to couple the fasteners 75 in turn, and then between each of the upper rails 12 and the lower ends of the lower rails 11 support rods 71. And the fixing rods 77 of the fixtures 75 and the corresponding fixing holes 22 are formed in each of the bulletin boards 2 in turn, so that not only the assembly can be made very simple but also the structure is simple. This improvement can of course also lower manufacturing costs.

In addition, even if the upper rail 12 and the lower rail 11 are firmly connected to each other by the supporting rods 71 and 71 even when the lower rail 11 is repeatedly lifted up and down of the abacus writing board 1, The phenomenon that the rail 11 is deformed to make it difficult to adjust the abacus writing board 1 to the height of the auxiliary writing boards 3 is excluded, and thus the height of the abacus writing board 1 is fixed to the auxiliary writing boards 3. Since it can be made easily, the secondary board 3 can be prevented from falling well.

In addition, when the fixing holes 23 are formed in the vertical member of the bulletin board 2, an additional effect of fixing the abacus writing board 1 in a state in which the height of the abacus writing board 1 is arbitrarily adjusted can be achieved. do.

Claims (2)

An abacus writing board 1 which is installed to be movable and has an upper rail 12 and a lower rail 11, both bulletin boards 2 and 2 which are installed adjacent to both sides of the abacus writing board, and both sides of the board In the raising and lowering position fixing device of the elevating blackboard, which is installed on the elevating blackboard comprising both auxiliary boards (3, 3) which are inserted to be pulled out in a direction so that the main plate can be fixed to the height of the auxiliary board. Two support rods 71 and 71 connected to the two bulletin boards and connecting end portions of the upper rail and the lower rail of the abacus plate, and through holes formed in the transverse direction in the middle portion of the stop plate; Case 76 is fixed to one side of each of the support bar in the through hole position, one end portion is installed to penetrate in the horizontal direction in the transverse direction so that the through hole of the support bar to move left and right, and also annular on one side of the outer peripheral surface Fixed bar 77 formed with a groove 78, the stopper 79 is installed while wrapping the annular groove to be detachable to the annular groove and the rear end is elastically supported by the first spring 80, around one side of the fixed rod Two fasteners (75, 75) having a second spring (81) inserted therein and a pushbutton (82) exposed to the outside through the front center of the case and having a rear end coupled to the front end of the stopper; And, And two fixing holes 22 and 22 which are sequentially formed in front vertical members of both bulletin boards so as to penetrate the through-holes of the supporting rods according to the left and right movement of the fixing rods so that the fixing rods can be inserted and drawn out. Lifting position fixing device of the elevating blackboard. The method of claim 1, The elevating position fixing device of the elevating blackboard, characterized in that a plurality of fixing holes (23) are further formed in the vertical member of the bulletin board and corresponding bulletin boards with the fixing holes interposed therebetween.