JPH08674B2 - Elevating floor device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an elevating / lowering floor device, and more particularly, to a floor part such as a gymnasium or a hall, which is connected to a floor part to elevate / lower the floor surface by each part. The present invention relates to an elevator floor device that is optimal for multipurpose use of these facilities by changing the floor surface to a flat floor, stairs, seats, or stage at any time.

[Conventional technology]

An elevating device for vertically moving a floor, such as an approaching stage, has a large supporting load and a relatively long vertical movement distance, and further requires stepless movement position control and stable movement operation.

As an example of a device configuration for that purpose, for example, Japanese Patent Laid-Open No.
There is a device disclosed in Japanese Unexamined Patent Publication No. 80699.

That is, in most of the lifting devices of this type, as shown in FIG. 7, a pair of struts 1 and 2 are crossed in an X-shape and movable at an upper end 4 with respect to a lower end 3 rotatably supported on a fixed base. The floor member 6 is also supported by a shaft support or the like, and in a state in which the columns 1 and 2 are pivotally attached to each other at the intersecting portions, these are pivoted with respect to each other in a wide-angle or narrow-angle direction about the pivotal portion 5. As a result, the floor member 6 can be freely moved between the raised position A ₁ and the lowered position A ₂ .

The floor of the upper and lower ends 4 and 5 is ensured by ensuring a long up-and-down moving distance of the floor member 6 and vertically moving the upper end 4 of the pillars 1 and 2 which pivots as shown in FIG. In order to secure the shaft fulcrum in the member 6 or the base, a configuration is adopted in which the pair of struts are configured to be extendable and retractable, and the floor member is raised and lowered in synchronization with the extension and contraction operation.

[Problems to be solved by the invention]

In such a floor elevating means, one of the technical requirements that must be solved mechanically is to secure the mechanical strength of the prop that can be paid out, and especially to prevent the prop from bending due to a supporting load. .

Yet another technical problem is the synchronous expansion / contraction mechanism of the pair of columns. For example, the columns 1, 2
In order to facilitate the synchronized movement of expansion and contraction of the column, it is composed of divided columns 1a, 1b and 2a, 2b extending in four directions from the pivotal portion 5 that intersects the columns 1, 2 respectively. If screw jacks are arranged in these parts and the screw rods 7, 7, ... Of these jacks and the common drive shaft 8 are connected by bevel gears 9 and 10 as shown in FIG. 5, the drive shaft 8 While the screw rod 7 (bevel gear 9) rotates (spins) by the rotation of the (bevel gear 10), the columns 1 and 2 which expand and contract by the rotation of the screw rod 7 are placed on the floor as shown in FIG. As the member 6 is moved, the columns 1 and 2 themselves also pivot around the pivotal portion 5 (drive shaft 8).

When the columns 1 and 2 pivot in opposite directions, the screw rod 7
That is, since the bevel gear 9 also turns (revolves) in the opposite direction, the actual rotation amount (expansion / contraction amount) of the screw rod 7 in this operation is the rotation amount of the drive-side bevel gear 10 based on the coupling ratio of both bevel gears 9 and 10. And the screw rod 7 that turns in the same direction as the rotation direction of the gear 10 has a difference corresponding to the amount of revolution at that time, while the screw rod that turns in the opposite direction to the rotation direction of the gear 10 At 7, it is the sum of the amount and the amount of revolution.

As a result, as shown in FIG. 7, the turning angle θ _{1 is} added to each expansion / contraction amount of the columns 1 and 2 driven by these screw rods 7 ...
An error corresponding to twice the amount of revolution of each bevel gear 9 (the total amount of the sum and the difference) due to the change between θ ₂ occurs, which causes the floor member 6 at the raised position A ₁ and the lowered position A ₂ to have the same error. Lateral deviation in the direction of the arrow on the diagram occurs.

Therefore, as an elevating device adopting such a device configuration, a practically effective device cannot be expected unless the above technical problems are solved.

Thus, the present invention has an object of developing a lifting / lowering floor device having such a function of preventing the lateral displacement of the floor member due to movement while ensuring the strength of the column.

[Means for solving problems]

Therefore, in order to solve the above-mentioned problems, in the present invention, a pair of telescopic columns crossing in an X shape and pivotally attached to each other at the crossing portions are arranged between the installation substrate and the floor plate. In the elevating mechanism for vertically moving the floor plate by the synchronized expansion and contraction operation, each of the pair of struts is composed of a multi-cylinder divided into two parts with the crossing part sandwiched therebetween, and these multi-cylinders are arranged in the crossing part. It is rotatably opposed to the shaft tube
The multiple cylinders are made to project and retract in multiple stages by screw jacks, and the coupling ratio of each bevel gear that connects each screw jack in these multiple cylinders with their common drive shaft is set between the pair of columns. In such a degree, the degree of offsetting the difference in the expansion and contraction amount of each screw jack caused by the change in the turning angle around the intersection of the columns,
We propose a different floor lifting device.

[Work]

As described above, by expanding and contracting the pair of crossed columns, the floor plate supported by this is moved up and down.
The stanchion divided into two parts sandwiching the pivotal portion expands and contracts by simultaneously projecting and retracting the divided multiple cylinders by the respective screw jacks.

The multiple cylinders are projected and retracted in multiple stages by rotating the screw rod of the jack in which the outermost cylinder or the center cylinder of each of the slidably fitted cylinders is screwed. Each of the cylinders that are extended or retracted in multiple stages has a wide sliding contact surface area between the cylinders and the other cylinders that are slidably fitted thereto, or can receive a supporting load by means such as two-point sliding contact, and The support pillar integrally connected to the multiple cylinder via the shaft tube in the pivotal portion sufficiently functions as a support pillar structure which is not bent by a supporting load consisting of a load on the floor and its own weight.

On the other hand, the individual bevel gear driving force transmission systems for driving the screw jacks respectively rotate (spin) the screw rods of these jacks by the rotation of the drive shaft, but due to different coupling ratios between these transmission systems, The rotation amount of one pillar structure is smaller than that of the other pillar structure.

Therefore, by applying the coupling ratio of the bevel gear, which reduces the amount of rotation, to the strut structure in which the swiveling motion (revolution) of the strut is in the direction opposite to the rotational direction of the drive shaft, the rotation increase of the screw rod due to the revolution is increased. Can be offset.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention.
A pair of stanchions 11 and 11 having axial supports 22 and 22 on both sides of 21 and axial supports 23 and 23 on the back surface of the lifting plate 16 as an intermediate floor plate, respectively, and the other ends 14 and 14 at the center of them. The portions 15 are pivotally supported to each other and are arranged in an X-shape.

Then, the central portion 15 has the support shaft 1 centered on the drive shaft 18.
Both 1 and 11 are rotatably assembled, and 24 and 24 denote continuous electric motors for driving the drive shaft 18. In addition, reference numeral 25 is a descent position regulating member, which is constructed so that its height position can be adjusted so as to abut against the most descent position of the central portion.

On the other hand, a floor 26 is placed on the upper surface of the lifting plate 16 via a supplementary lifting device, and a seat 27 or the like is placed on the floor 26, for example.

In this supplementary lifting device, both ends of the first link 28 are connected to the lifting plate.
Feeding device consisting of 16 upper surface and screw jack etc.
29 and 29, each of which is rotatably mounted, has a second link 32 in which one end is rotatably supported at the center of the link 28 and the other end is rotatably supported at the end of the elevating plate 16 by a second link 32. In operation, the first and second links 28, 32 open in a T-shape to support the floor portion 26 in the manner shown in the upper chain line in the figure.

 In addition, reference numeral 33 indicates a drive motor for the supplementary lifting device.

The columns 11 and 11 are each constructed as shown in the second drawing.

That is, the column 11 is divided into two parts with the pivotally supported central part 15 as a boundary, and these divided parts are fixed outer cylinder 34 and sliding intermediate cylinder 35.
And a sliding tube 37 composed of a sliding center tube 36. Sliding contact rings 38, 39, 40, 41 provided at the ends of the tubes 34, 35, 36, respectively.
And 42 with respect to the outer cylinder 34, the intermediate cylinder 35 and the central cylinder.
36 is removable, and the sliding contact ring 40 located on the outer periphery of the middle of the central cylinder 36 comes into contact with the inner edge of the tip sliding contact ring 42 of the intermediate cylinder 35 as the cylinder 36 is extended, and then the intermediate Cylinder
35 is pulled out integrally with the center tube 36, and when the center tube 36 is pulled in, the tip flange 43 of the tube 36 comes into contact with the outer edge of the tip sliding contact ring 42 of the intermediate tube 35 to pull the tube 35 integrally. It is assumed that the telescope type multi-stage telescopic structure configured as described above is used.

Moreover, the screw hole integrally attached to the inner peripheral wall of the center tube 36.
The screw rod 48 of the screw jack is screwed onto the screw 44, and the rotation of the screw rod 45 controls the expansion and contraction of the multiple cylinder 37.

FIG. 4 is a vertical cross-sectional view showing the structure of the central portion 15 of the columns 11, 11, and the outer cylinders 34 of the four multi-cylinders 37 forming the respective columns 11, 11 have the drive shaft 18 Are fixed in four directions to a receiving member 46 that is rotatably assembled to a shaft tube 47 that is integrally fitted with via a conical bearing 48.

As a result, the two multiple cylinders 37 forming each of the columns 11 are linearly integrally connected with each other with the shaft tube 47 interposed therebetween.

Further, drive shaft-side bevel gears 49a, 49b are integrally attached to the shaft tube 47 at the inner position of the receiving member 46.

On the other hand, an annular collar 50 is arranged inside the fixed end of the outer cylinder 34, and a relay shaft 53 is rotatably supported by a double bearing bearing mechanism including a conical bearing 51 and a ball bearing 52. Passive side bevel gears 54a and 5 meshing with the drive side bevel gear 49a or 49b at the tip of the relay shaft 53.
4b is attached to each one.

Further, the screw rods 45 are integrally connected to the relay shaft 53 to form a drive unit for each screw jack.

In addition, reference numeral 55 denotes a key hole for integrally mounting the shaft tube 47 on the drive shaft 18.

Therefore, by the rotation of the drive shaft 18, the passive bevel gears 54a and 54a meshing with the drive bevel gears 49a and 49b, respectively.
As 4b rotates, as described above with reference to FIGS. 5 and 6, the expansion and contraction of each multi-cylinder 37 by the rotation of each screw rod 45,
Each of the columns 11 arranged in a crossed manner turns around the central portion 15.

Then, in this operation, the passive side bevel gears 54a and 54b are driven by the drive side bevel gear 49a or 4 in addition to the rotation (rotation).
It will turn (revolve) in the opposite direction along 9b.

Therefore, in order to cancel the difference in the rotation (rotation) of the screw rod 45 caused by this reverse revolution, in the present embodiment, the passive side bevel gear 54b with respect to the support column 11 on the side pivoting in the rotational direction of the drive shaft 18 is provided. The number of teeth and the number of teeth of the drive-side bevel gear 49b are configured to 20:18, and on the other hand, the number of teeth of the automatic-side bevel gear 54a with respect to the support 11 on the side that rotates in the same direction as the rotation direction of the drive shaft 18 and its drive. Set the number of teeth on the side bevel gear 49a to 2
It is configured at 1:19.

The difference in the number of teeth in the bevel gear coupling mechanism is determined by the amount of expansion and contraction of the multi-cylinder 37 (the number of rotations of the screw rod 45) and the turning angle range of the stanchions 11, 11, and the like. The offset setting is made so that the difference in the amount of expansion and contraction due to the revolution is erased or suppressed to a very small difference.

Then, due to the expansion and contraction of the columns 11 and 11 accompanied by the turning, the fixed base
The elevating plate 16 that moves up and down with respect to 12 (range from the position shown by the solid line in FIG. 1 to the position shown by the same chain line) is further moved from the plate 16 to the state shown by the upper chain line in FIG. The floor 26 can be pushed up to.

Then, in addition to the self-weight of the lifting plate 16, the supplementary lifting device, and the floor portion 26 that move up and down in this manner, the load placed on the floor portion 26 is integrated through the columns 11 and 11, that is, the shaft tube 47. Since the central cylinder 36, the screw rod 45, the relay shaft 53 and the annular collar 50 for receiving the same, the fixed end of the cylinder 34, the receiving member 46 and the shaft tube 47 in the provided multiple cylinder 37 are received by the coupling mechanism, the bevel gear The mechanism does not receive this load directly.

〔The invention's effect〕

As described above, according to the device of the present invention, a pair of telescopic columns crossing in an X shape and pivotally attached to each other at the crossing portions are arranged between the installation substrate and the floor plate, and these columns are synchronized. In the elevating mechanism in which the floor plate is moved up and down by the expansion and contraction operation, the expansion and contraction of the supporting column is made up of multiple cylinders, so that the shape required for strength corresponding to the supporting load (material, cylinder thickness and sliding contact surface support portion). Etc.), it is possible to adopt a configuration in which the bevel gear in the expansion / contraction drive system is removed from the support load system without any fear of bending in the column, and the operation and durability of the gear are improved. It can be kept stable and surely, and by changing the coupling ratio between both columns in the bevel gear, the amount of expansion and contraction of the clew jack according to the turning angle of each column generated during lifting operation can be adjusted. Since none so as to cancel,
It is possible to prevent lateral displacement of the floor plate in the ascending / descending position, and to secure a stable floor plate in the ascending / descending position. Alternatively, the device of the present invention is extremely effective as a multipurpose use means such as a hall.

[Explanation of symbols]

 11 …… Post, 15 …… Central part 16 …… Elevating plate, 18 …… Drive shaft 21 …… Fixed base, 26 …… Floor part 34 …… Outer cylinder, 35 …… Middle cylinder 36 …… Central cylinder, 37 ...... Multiple cylinder 45 …… Screw rod, 47 …… Shaft tube 49a, 49b …… Drive side bevel gear 54a, 54b …… Passive side bevel gear

Claims (4)

[Claims] 1. A pair of telescopic columns crossed in an X shape and pivotally attached to each other at the intersections are arranged between the installation substrate and the floor plate, and the floor plate is moved by the synchronized telescopic movement of these columns. In an up-and-down mechanism configured to move up and down, each of the pair of columns is composed of a multi-cylinder divided into two parts with the intersecting part sandwiched therebetween, and the multiple cylinders are rotatably opposed to a shaft tube in the intersecting part. However, the multiple cylinders are made to appear and disappear in multiple stages by screw jacks, and the coupling ratio of each bevel gear that connects each screw jack in these multiple cylinders with their common drive shaft is set to An elevating / lowering floor device which is different to the extent that the difference in expansion / contraction amount of each screw jack caused by a change in a turning angle of the pillars around the intersection portion is offset. 2. The lifting floor device according to claim 1, wherein the multiple cylinder is a telescope type. 3. An elevating floor apparatus according to claim 1, wherein the screw rod of the screw jack in the multiple cylinder is screwed into the central cylinder. 4. The coupling ratio of the screw jack side to the drive shaft side of the bevel gear is 20:18 for the support column that pivots in the rotational direction of the drive shaft, and for the support column that pivots in the opposite direction to the shaft. 21:19 and the lifting floor device according to claim 1.