JP3601378B2 - Lifting table - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a lifting table, and more particularly, to a lifting table capable of adjusting a height of a top plate.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, various types of elevating tables capable of adjusting the height of a top plate have been provided. This type of elevating table has a built-in elevating mechanism that can adjust the height of the top plate in synchronization with the left and right legs supporting the top plate.
[0003]
For example, the leg is formed by connecting a lower leg having a ground contact portion and an upper leg provided on the top plate so as to be concentrically slidable, and the elevating mechanism is provided on an upper portion of an adjustment shaft disposed in the leg. Is connected to an upper end of the upper leg so as to be rotatable in a fixed position, and a screw shaft formed at a lower portion of the adjusting shaft is screwed to a nut fixed inside the lower leg.
[0004]
However, in order to link the lifting mechanisms on both the left and right sides, when the interlocking shaft is laid horizontally along the lower surface of the top plate, the interlocking shaft projects from the lower surface of the top plate, so when using the space below the top plate, for example, This will hinder the drawer. On the other hand, if a concave groove for accommodating the interlocking shaft is formed in the lower surface of the top plate in the lateral direction, the thickness of the top plate becomes thinner at that portion, the strength is significantly reduced, and a heavy object can be placed. The inconvenience of being unable to do so occurs.
[0005]
[Problems to be solved by the invention]
In view of the above situation, the present invention seeks to solve the problem that the interlocking shafts for interlocking the lifting mechanisms built into the left and right legs do not protrude from the lower surface of the top plate, and any protrusions on the lower surface of the top plate. It is another object of the present invention to provide a lifting table which reinforces the top plate without providing the lifting table and further does not expose the transmission means between the lifting mechanism and the interlocking shaft at all.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention provides a vertically movable lifting and lowering mechanism that adjusts the height of the top plate in synchronism with the left and right legs supporting the top plate by interlocking shafts provided horizontally along the lower surface of the top plate. A lifting table having a built-in mechanism, wherein a channel member is mounted in a concave groove formed in a lateral direction of a lower surface of the top plate, and the lifting table is configured to house the interlocking shaft in the channel member.
[0007]
Here, the channel member has fixing portions along both sides of a steel-made receiving section having a U-shaped cross section, and the channel member is fitted with the receiving section in the concave groove, and both fixing sections are formed. A steel cover member having a U-shaped cross section, which is opened upward, is attached to the housing portion that houses the interlocking shaft such that the steel cover member does not protrude from the lower surface of the top plate. Is a preferred form.
[0008]
Further, the lifting mechanism is disposed in the leg, and an operating unit provided at an appropriate position on the top plate and a transmission means for interlocking the lifting mechanism and the interlocking shaft are provided in the upper end of the leg, and the upper end of the leg is provided. Is more preferably mounted in a state of being received in a recess formed in the lower surface of the top plate.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 shows a lifting table A according to the present invention, and FIGS. 2 to 8 show details of each part. In the drawings, reference numeral 1 denotes a top plate, 2 denotes a leg, 3 denotes a lifting mechanism, 4 denotes an operation unit, and 5 denotes an operation unit. Each shows a gear transmission means.
[0010]
The elevating table A according to the present invention incorporates elevating mechanisms 3, 3 capable of adjusting the height of the top plate 1 in synchronism with the left and right legs 2, 2 supporting the top plate 1, and It has a basic structure in which operating parts 4,... For driving the elevating mechanisms 3, 3 are provided on an upper surface part and a front end part on both right and left sides of the plate 1.
[0011]
The top plate 1 is a wooden plate in the present embodiment, and upper ends of the legs 2 are fixed to central portions on both sides of the lower surface 6. The leg 2 is formed by connecting a hollow cylindrical lower leg 7 and a hollow cylindrical upper leg 8 provided below the top plate 1 so as to be concentrically slidable. The lower leg has a ground contact portion 9 extending in the front-rear direction, and the upper leg 8 has a fixing plate 10 at the upper end. The fixing plate 10 is attached to the lower surface 6 of the top plate 1. In this embodiment, the upper leg 8 has a structure in which the upper leg 8 is slidably fitted inside the lower leg 7. A cap 11 serving also as a slider is attached to the upper edge of the lower leg 7. A spacer 12 also serving as a slider is attached to the outer periphery of the lower end so that the upper leg 8 moves up and down smoothly with respect to the lower leg 7.
[0012]
The elevating mechanism 3 connects an upper part of the adjusting shaft 13 disposed in the leg 2 to an upper end of the upper leg 8 so as to be rotatable in a fixed position, and a screw shaft formed at a lower part of the adjusting shaft 13. The part 14 is screwed into a nut part 15 fixed in the lower leg 7.
[0013]
More specifically, as shown in FIG. 4, the adjusting shaft body 13 has the screw shaft part 14 formed in substantially half of the lower part, the shoulder part 16 formed in the upper end part, and the operating handle 17 engaged with the upper end part. An operating unit 4 is formed. The nut portion 15 is fixed in an upper end portion of a square pipe-shaped fixing member 18. A fixing piece 19 at a lower end of the fixing member 18 is screwed to a bottom plate (not shown) of the lower leg 7 from below. I have.
[0014]
Then, as shown in FIGS. 5 and 6, the gear transmission means 5 is incorporated in the upper end of the upper leg 8 above the thrust bearing 20 with the thrust bearing 20 abutting on the shoulder 16 of the adjusting shaft 13. It is inserted from below through a synthetic resin bearing 24 into a shaft hole 23 of a receiving plate 22 fixed horizontally while leaving a space portion 21, and a first helical gear 25 is inserted into the adjusting shaft 13 above the bearing 24. Are fixedly connected so as to be rotatable in a fixed position. The first helical gear 25 is fixed to the adjusting shaft 13 by a pin 26 penetrating both.
[0015]
The fixed plate 10 has an upper end of the upper leg 8 penetrated through an opening 27 provided in the fixed plate 10 and is fixed slightly above the receiving plate 22. That is, the upper end of the upper leg 8 protrudes above the fixing plate 10, and the gear transmission means 5 including the first helical gear 25 is built in the space 21 in the protruding portion. It is.
[0016]
In order to interlock the lifting mechanisms 3 and 3 incorporated in the left and right legs 2 and 2, an interlocking shaft 28 provided laterally on the lower surface 6 of the top plate 1 is connected to each leg 2 via the gear transmission means 5. It comprises a solid built-in shaft 28A connected to the adjusting shaft 13 and a hollow connecting shaft 28B connecting the two built-in shafts 28A, A. The built-in shaft 28A penetrates through the upper leg 8 at substantially the same height as the first helical gear 25 so as to be orthogonal to the adjusting shaft 13 on the front side, and each penetrating portion is made of synthetic resin. , And a second helical gear 31 meshing with the front side of the first helical gear 25 is fixed in the middle of the bearings with pins 32 in the same manner as described above.
[0017]
Further, an operation shaft body 33 having a front end side operation part 4 at a front end is disposed on both sides of the lower surface 6 of the top plate 1 in the front-rear direction, and the rear end of the operation shaft body 33 is fixed to the fixing plate. 10 is inserted into the upper leg 8 from the front so as to be orthogonal to the built-in shaft 28A on the lower side at a position along the lower surface of 10, and a third helical gear 34 is fixed to the rear end thereof with the pin 35 as described above. The third helical gear 34 meshes with the lower side of the second helical gear 31. The front portion of the receiving plate 22 corresponding to the portion where the third helical gear 34 is provided is notched. Further, in the present embodiment, since the cross-sectional shape of the leg 2 is an elliptical shape extending in the front-rear direction, the restricting piece 36 is fixed to the front side within the upper end of the upper leg 8, and the operating shaft is attached to the restricting piece 36. The body 33 is penetrated, and the third helical gear 34 abuts on the restricting piece 36 so that the rotation is smooth. The front end of the operating shaft 33 is rotatably supported by a bearing 37 fixed to the lower surface 6 of the top plate.
[0018]
In the lower surface 6 of the top plate 1, a portion corresponding to the upper end of the upper leg 8 is formed with a concave portion 38 for receiving an upper portion from the fixing plate 10, and the interlocking portion is provided between the concave portions 38. A concave groove 39 for accommodating the shaft 28 is formed. The fixing plate 10 is attached to the lower surface 6 of the top plate 1 with appropriate fixing means such as a screw while receiving the upper end of the upper leg 8 having the gear transmission means 5 built in the recess 38.
[0019]
Here, the strength of the top plate 1 is reduced by forming the concave groove 39. To compensate for the reduced strength and further reinforce the top plate 1, as shown in FIGS. 2, 3, 6, and 8, FIG. A steel channel member 40 having fixing portions 40B, 40B along both sides of a receiving portion 40A having a U-shaped cross section is fitted with the receiving portion 40A in the groove 39, and both fixing portions 40B, 40B are fitted. Is attached to the lower surface 6 of the top plate by an appropriate fixing means such as screwing or bonding. In the present embodiment, the fixing portions 40B, 40B are also positioned on the steps 41, 41 formed on the lower surface 6 of the top plate so as not to protrude from the lower surface 6. After accommodating the interlocking shaft 28 in the accommodating portion 40A of the channel member 40, a steel cover member 42 having a U-shaped cross section opened upward is fitted to the accommodating portion 40A, and the accommodating portion 40A is The lower surface 6 is closed so that there is no unevenness. In the structure in which the cover member 42 is fitted to the channel member 40, a plurality of engaging holes 43 are formed on the facing surface of the housing portion 40A, and the cover corresponding to the engaging holes 43 is formed. Projections 44,... Are formed on both outer surfaces of the member 42, and are prevented from coming off by engagement of the engagement holes 43 with the projections 44.
[0020]
Here, when the channel member 40 and the cover member 42 are integrated, the channel member 40 and the cover member 42 have a hollow pipe shape, and thus have extremely high bending strength. Further, in the present embodiment, the channel member 40 is formed of a steel plate having a large thickness, for example, 1.6 mm thick. The thickness of the cover member 42 is 0.8 mm.
[0021]
In this manner, the adjusting shaft 13, the interlocking shaft 28 laterally provided on the lower surface 6 of the top plate 1, and the operating shaft 33 are orthogonally arranged, and the gear transmission means 5 is provided at the intersection. The gear transmission means 5 is composed of a first helical gear 25, a second helical gear 31, and a third helical gear. Therefore, each of the operation units 4,... Provided on the upper surface portion and the front end portion on the left and right sides of the top plate 1 raises the top plate 1 with respect to the rotation in the normal rotation direction, and moves the top plate 1 with respect to the rotation in the reverse rotation direction. The gear transmission means 5 is configured so that the top plate 1 descends. Also, the upper end of the adjusting shaft 13 faces the upper surface from the through hole 45 of the top plate 1 to form an operating portion 4 on the upper surface, and the front end of the operating shaft 33 faces the front from the bearing 37 and the front end. The operation unit 4 of the unit. A cap 46 having an openable and closable lid is fitted into the through hole 45 of the top plate 1, and the operation unit 4 of the adjustment shaft 13 is located in the cap 46.
[0022]
In the present embodiment described above, the operation unit 4 is provided at a total of four locations, that is, the upper surface portion and the front end portion on both the left and right sides of the top 1. 1 can be adjusted up and down. That is, when the operating handle 17 is connected to the operating portion 4 of one of the right and left adjusting shafts 13 and rotated, the adjusting shaft 13 is directly rotated and the rotational force is transmitted from the first helical gear 25 to the first helical gear 25. (2) The interlocking shaft 28 is rotated via the helical gear 31, and the other adjustment shaft body 13 is rotated from the other second helical gear 31 via the first helical gear 25 in conjunction therewith. is there. Since the adjusting shafts 13 on both the left and right sides rotate in the same direction, they can be displaced up and down with respect to the nut portion 15 fixed to the lower leg 7, so that the height of the top plate 1 can be adjusted. When the operating handle 17 is connected to the operating portion 4 of one of the left and right operating shafts 33 and rotated, the rotational force is changed from the third helical gear 34 to the second helical gear 31 and the first helical gear. The torque is transmitted to the adjusting shaft 13 via the helical gear 25, and the rotational force is transmitted from the second helical gear 31 to the interlocking shaft 28, so that the other adjusting shaft 13 rotates in conjunction with the other, similarly to the above. .
[0023]
Further, although not shown, both ends of the interlocking shaft 28 face both sides of the top plate 1 and the ends serve as operation portions, so that the operation portions 4,. Are provided at a total of six places: the upper surface, the front end, and both ends. Although the example using a helical gear as the gear transmission means 5 has been described, it may be configured using a bevel gear. Furthermore, it is also possible to configure by a rotation transmitting means that does not use a gear. When the operation handle 17 is not used, the operation handle 17 is accommodated in the front end portion of the top plate 1 in the lower rear direction, and is stored in the upper surface portion when the operation handle 17 is not used. In that case, it is also possible to provide it on the upper surface and store it in the accommodation hole.
[0024]
The procedure for assembling the elevating table A according to the present invention is as follows. First, the adjusting shaft 13, the built-in shaft 28 A and the operating shaft 33 are mounted on the upper leg 8 of the leg 2, and the first helical gear 25 is mounted on each of them. After the second helical gear 31 and the third helical gear 34 are assembled in advance, the screw 14 of the adjusting shaft 13 is screwed to the nut 15 fixed to the fixing member 18 to a predetermined depth. At this time, as shown in FIG. 4, a retaining pin 49 is fitted into the hole 48 with the hole 48 formed at the tip of the screw shaft portion 14 positioned in the opening 47 formed on the side surface of the fixing member 18. A screw or a screw is screwed into the stopper to prevent excessive rise. Then, the upper leg 8 is inserted into the lower leg 7 and the fixing member 18 is inserted into the lower leg 7 and fixed to the bottom surface. Then, after mounting the channel member 40 in the concave groove 39 of the top plate 1 and fixing each leg 2 at a predetermined position on the lower surface 6 of the top plate 1, the end of the channel member 40 overlaps with the fixed plate 10. Therefore, the strength is increased. Then, the bearing body 37 is mounted on the lower surface 6 of the top plate, the connecting shaft 28B is connected between the two built-in shafts 28A, 28A, and finally the cover member 42 is mounted.
[0025]
Since there is no protrusion on the lower surface 6 of the top plate 1, a drawer (not shown) can be attached to the lower surface 6.
[0026]
In another embodiment shown in FIG. 9, the shape of the top plate 1 is an irregularly shaped top plate, and the illustrated example is a ring-shaped equally divided shape in plan view. That is, the front and rear edges of the top plate 1 are arcs and both side edges are straight. In this case, the legs 2, 2 are provided along both side edges, but the orthogonal state of the adjusting shaft 13, the interlocking shaft 28, and the operating shaft 33 is maintained. When a plurality of such lifting tables A,... Are combined, a large circular table as shown in FIG. 9 can be obtained, and the height of each top plate 1 can be freely set. And the healthy person can be seated at the same time.
[0027]
【The invention's effect】
The elevating table according to the first aspect of the present invention adjusts the height of the top plate in synchronism with the left and right legs supporting the top plate by interlocking shafts provided along the lower surface of the top plate. A lifting table incorporating a possible lifting mechanism, wherein a channel member is mounted in a groove formed in a lateral direction on the lower surface of the top plate, and the interlocking shaft is housed in the channel member. The interlocking shaft for interlocking the lifting mechanism built into the legs does not protrude from the bottom surface of the top plate, that is, the interlocking shaft can be built in the top plate, and the groove of the top plate is formed by forming a concave groove. The strength reduction can be reinforced by the channel member, and by providing an option such as a drawer, the space under the top plate can be effectively used.
[0028]
According to the second aspect, in a state where the channel member and the cover member are integrated, the channel member and the cover member have a hollow pipe shape, so that the bending strength is extremely high, and the ceiling member is not provided with any protrusion on the lower surface of the top plate. The board can be reinforced strongly.
[0029]
According to the third aspect, the elevating mechanism and the transmission means of the elevating mechanism and the interlocking shaft are also incorporated in the legs and are housed in the recesses on the lower surface of the top plate, so that the mechanism can be completely exposed to the outside. The appearance can be exactly the same as a simple table that does not move up and down.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a lifting table according to the present invention.
FIG. 2 is an exploded perspective view of the whole.
FIG. 3 is an exploded perspective view of the main part.
FIG. 4 is an exploded perspective view showing a part of a lifting mechanism.
FIG. 5 is a vertical sectional side view of a main part.
FIG. 6 is a vertical sectional front view of a main part.
FIG. 7 is a vertical sectional plan view of a main part.
FIG. 8 is a partial vertical sectional side view showing a state where the interlocking shaft is housed.
FIG. 9 is a simplified plan view showing a use state according to another embodiment.
[Explanation of symbols]
A lifting table 1 top plate 2 legs 3 lifting mechanism 4 operation unit 5 gear transmission means 6 bottom surface 7 lower leg 8 upper leg 9 grounding unit 10 fixing plate 11 cap 12 spacer 13 adjusting shaft 14 screw shaft 15 nut 16 shoulder Part 17 operation handle 18 fixing member 19 fixing piece 20 thrust bearing 21 space part 22 receiving plate 22 receiving plate 23 shaft hole 24 bearing 25 first helical gear 26 pin 27 opening 28 interlocking shaft 28A built-in shaft 28B connecting shaft 29, Reference Signs List 30 bearing 31 second helical gear 32 pin 33 operating shaft body 34 third helical gear 35 pin 36 regulating piece 37 bearing body 38 concave portion 39 concave groove 40 channel member 40A housing portion 40B fixing portion 41 step portion 42 cover member 43 Engagement hole 44 Projection 45 Through hole 46 Cap 47 Opening 48 hole

Claims (3)

A lifting table having a built-in lifting mechanism capable of adjusting the height of the top plate in synchronism with each other by an interlocking shaft horizontally provided along the lower surface of the top plate on left and right legs supporting the top plate, A lifting table, wherein a channel member is mounted in a groove formed in a lateral direction of a lower surface of the top plate, and the interlocking shaft is housed in the channel member. The channel member has a fixing portion along both sides of a steel receiving portion having a U-shaped cross section. The channel member is fitted with the receiving portion in the concave groove, and both fixing portions are attached to the lower surface of the top plate. 2. A steel cover member having a U-shaped cross section, which is opened upward, is mounted on the housing portion housing the interlocking shaft so as not to protrude from the lower surface of the top plate. Lifting table. The elevating mechanism is disposed in the leg, and an operating unit provided at an appropriate position on the top plate and a transmission means for interlocking the elevating mechanism and the interlocking shaft are provided in the upper end of the leg. 3. The elevating table according to claim 1, wherein the elevating table is mounted in a state of being received in a concave portion formed on the lower surface of the plate.

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