JPS5948558A - Height adjustable steps unit fixing mechanism - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stair unit fixing mechanism that allows a curved staircase to be assembled without the need for supports.

As shown in FIGS. 1 and 2, the present inventor previously discovered that the upper surface 3a of two cylindrical bodies 1 and 2, which are vertically shifted and arranged in parallel, is perpendicular to the axes Y and Y'. erects and fixes a planar element 3, one cylindrical body 1 is made to protrude above the element 3, the other cylindrical body 2 is made to protrude below from the element 3, and the outside of the cylindrical body 1 that has been made to protrude upward is The stair unit 4 has a diameter slightly smaller than the inner diameter of the other cylindrical bodies 2 and is configured to be able to be inserted into the cylindrical bodies 2 and 1 of another unit (not shown) to which both the cylindrical bodies 1 and 2 correspond. Proposed. (Special application 1984-1
63010) Such a stair unit 4 is fitted into the cylindrical body of another unit as shown in FIG. ) and then repeat this process to complete the curved staircase.

Note that 5 is a footboard, 6 is a floorboard, and 7 is an upper unit attached to the floorboard 6.

On the other hand, since the height between floors of each floor and the location of stair installations differ for each building, in order to popularize the stair units, it is essential to develop a fixing mechanism that allows easy height adjustment and angular displacement between stair units. .

In response to such technical requirements, the present inventor previously proposed a fixing mechanism shown in FIG. 4. (Japanese Patent Application No. 56-68885) That is, its structure includes two rows of circular holes 10 that are bored parallel and symmetrically to the cylinder 1 that projects upward, and rivets that are slidably inserted into the circular holes 10. shaped pin 11 and a bolt shaft 12 on the shaft center.
It consists of a truncated cone 13 fixed vertically, a truncated cone 13 through which the bolt shaft 12 can be inserted, and a nut 14 screwed onto the bolt shaft 12. By arranging the conical frustums 13 and 14 facing each other and then tightening them with the nut 15, both the conical frustums 13 and 14 move toward each other, and as a result, the pin 11 is pushed outward and the tip end is tightened. The units 4, 4' are fixed to each other by being pressed against the circumferential inner surface of the other cylindrical body 2'.

Although such a fixing mechanism is certainly capable of height adjustment and angular displacement, it is a mechanism in which the inserted cylinders 1 and 2' are fixed in a floating state, so fixing is troublesome, and the stair unit is difficult to fix. It has the disadvantage that fine adjustment of the distance height and angular displacement is difficult.

Furthermore, such a fixing mechanism starts assembly from the upper unit 7 attached to the second floor floor board 6 or from the lower unit (not shown) attached to the first floor floor board, but when starting assembly from the upper unit 7, In order to prevent each stair unit 4 from falling off, a member is required to support each stair unit 4 until it is temporarily fixed, which makes assembly work difficult.

In view of the drawbacks of the prior art, it is an object of the present invention to provide a fixing mechanism for a stair unit that allows for easy adjustment of the height and angular displacement, as well as temporary fixing and permanent fixing. A movable cylinder that can be freely connected to a large diameter cylinder having a threaded portion formed at the upper end of the protruding small diameter cylinder, the lower part of which is screwed into the threaded portion, and a bolt hole bored on the axis. A locking member that is locked or fixed to the body and a large-diameter cylindrical body that projects downward to prevent it from moving downward, and that has a bolt hole drilled on the axis, and a locking member that has a bolt hole drilled on the axis, and The stair unit fixing mechanism includes the movable cylinder and a fixing member that fixes the locking member when clamped.

The present invention will be explained below based on the drawings.

An embodiment of the present invention is shown in FIGS. 5 and 6, in which 21 is a cylindrical body of the stair unit 24 that projects above the element 23, 26 is a movable cylindrical body screwed onto the cylindrical body 21, Reference numeral 22 designates the cylindrical body of another stair unit 24' that protrudes below the element 23', and as described above, its inner diameter is formed slightly larger than the outer diameter of the cylindrical body 21, and is configured to be fitable and rotatable. has been done. 27 is a bolt, and 28 is a nut.

The small-diameter cylindrical body 21 is open at the top, and has a screw 25 of a certain depth cut into its inner circumferential surface. The movable cylindrical body 26 includes a cylindrical tube 29 whose outer diameter is the same as that of the cylindrical body 21, and a screw fixed to the lower inner peripheral surface of the cylindrical tube 29 and screwed onto the outer peripheral surface of the cylindrical tube 29 and screwed into the cylindrical threaded portion 25. It consists of a cylindrical tube 30 with a threaded surface, and a disc-shaped cover 31 fixed to the upper end of the cylindrical tube 29 and having a bolt hole 31a in its axis. Nuts 28 are fixed at corresponding positions, and four rotating jig mounting holes 32 are bored in the upper surface of the nuts 28 symmetrically around the bolt holes 31a.

Further, the cylinder body 22' that protrudes downward has a bolt hole 33a drilled along the axis at a position slightly lower than the element upper surface 23a', that is, on the inner circumferential surface to the extent that the bolt 27 heads are hidden. A disk-shaped locking member 33 is fixed. The locking member 33 forms a gap 33c radially around the outer ring 33b and the bolt hole 33a, and the movable cylinder 26 can be rotated from above the locking member 33 through the gap 33c by a rotating jig 34. configured.

To explain the operation of this embodiment with such a configuration, first, in height adjustment, since the height (h1) from the top surface 23a' of the element to the bottom surface of the locking member 33 is constant, the height of the element from the top surface of the lid-like cylinder 26 is constant. Height between upper surfaces 23a (h2+α)
By adjusting , a desired height (h) between the stair units 24 and 24' can be obtained as shown in the formula below.

h=h1+(h2+α) h: Height between the stair units 24 and 24' h1: Height between the top surface of the element 23a' and the bottom surface of the locking member 31 (-constant) h2+α: Height between the top surface of the lid-like cylinder 26 and the top surface of the element 23a Main stair units 24, 24' based on the calculation formula
However, at a normal construction site, there is always a discrepancy between the site dimensions and the drawing dimensions, so after making rough adjustments during temporary assembly, fine adjustments are made during the actual assembly. It is sufficient to adopt an assembly procedure that performs the following steps. In this embodiment, it is extremely easy to perform such two-step adjustment, and this point is completely different from the prior art.

That is, first, to explain the case where assembly is started from the lower unit (not shown), the movable cylinder 29 is screwed into the threaded part 25 of the cylinder 21 and rotated one turn, and the upper surface of the element is moved from the upper surface of the movable cylinder 29. 23a to the desired height position (h2+
α), then adjust the cylindrical body 22 of the other stair unit 24' to
′ is inserted from above, and the cylinder 22′ is placed on the movable cylinder 29.
After locking the locking member 33, both units 24, 24
The angular displacement (β) between ' is adjusted, and finally the bolt 27 is passed through both bolt holes 27a, 28a and screwed into the nut 28 for temporary fixing. By repeating this process, the temporary assembly of all stair units is completed.

After completing the temporary assembly, it was confirmed that the angular displacement (β) between each stair unit 24, 24' was a predetermined angle, and the upper unit 7 and lower unit (not shown) were attached to the first and second floor floor plates 6. is completely fixed at a predetermined height position, and then rotated from the locking member cavity 33c in order to distribute the discrepancy between the drawing size and the field size or the error that occurred during assembly to each stair unit 24... Insert the jig 34 into the mounting hole 32 of the movable cylindrical body 29, rotate the cylindrical body 29, and adjust the height (h2+
Make fine adjustments to α) and angle (β). Further, the bolt 27 is completely tightened and fixed, and this process is repeated to complete the main assembly.

In the embodiment described above, since the locking member is fixed to the midsection of the large-diameter cylindrical body, when the cylindrical bodies are inserted into each other, there is a risk that play may occur or the axes may become mismatched.

FIG. 7 shows another embodiment for solving this problem, and the differences from the previous embodiment will be mainly explained.

41 is a small diameter cylindrical body that is open at the top; 42 is a movable cylindrical body;
43 is a locking member, 44 is a bolt, and 45 is a nut.

The small-diameter cylinder 41 has a cylindrical screw member 46 fixed to the upper end of its inner periphery, the outer periphery of which is threaded with a constant length. The movable cylinder 42 is a cylinder 42a whose outer diameter is the same as that of the cylinder 41.
The screw member 4 is attached to the lower inner peripheral surface of the cylindrical body 42a.
At the same time, a screw 42b to be screwed into the hole 6 is threaded, and a disk-shaped fixing plate 47 is welded to the center of the inner peripheral surface. The fixed plate 47 has a bolt hole 47a formed on its axis, a nut 45 fixed to the lower surface thereof, and a plurality of rotating jig mounting holes 47b symmetrically formed around the bolt hole 47a. The length of the cylindrical body 42a is determined by arbitrarily determining the vertically movable range of the predetermined height between the stair units 40 and 40'. The locking member 43 is made up of a concave cylinder 48 , a collar 49 surrounded around its upper end, and a pair of screw mounting plates 50 extending outward from the flange 49 . A gap 53b is formed around a bolt hole 53a which is formed so as to be fitable on the inner circumferential surface and which is bored on the axis of the bottom plate 53. Also, the brim portion 49 has a large diameter cylinder 5.
1. Determine its outer diameter so that it can be locked on the top surface. The locking member 4 is fixed to the stair unit by screws 52 attached to a screw mounting plate 50.

Next, the operation of this embodiment will be explained.

When starting assembly from the upper unit, move the movable cylinder 42
is screwed onto a screw member 46 fixed to the small diameter cylinder 4l and rotated to adjust the height from the upper surface of the fixed plate 47 of the movable cylinder 42 to the element upper surface 54a to a desired height position (h2+α).
After fitting the adjusted stair unit 40 into the large-diameter cylinder 51' of another stair unit 40' fixed to the upper unit 7 from below, insert the bolt hole 47 from above the locking member 43.
Insert the bolt 44 into the hole a and screw it into the nut 45 to lock both units 40, 40' together. Next, the stair unit 40 is rotated to adjust the angle and then temporarily tightened. By repeating this process, the temporary assembly is completed.

After the temporary assembly is completed, the movable cylinder 42 is moved through the gap 53b of the locking member by the rotary jig 34 in order to allocate the drawing dimensions or errors caused during assembly to each stair unit 40, as in the previous embodiment. Rotate the height (h2+α) and angle (β)
After making fine adjustments, the bolt 44 is screwed and secured to complete the assembly.

In this embodiment, since the small-diameter cylinder 41 and the movable cylinder 42 are fitted over almost the entire inner peripheral surface of the large-diameter cylinder 5l, when the units 40 and 40' are fixed together, there is no play or center of the axis. There is less risk of disagreement.

In this embodiment, the locking member 43 is fixed to the stairway unit, but if the assembly is started from the upper unit 7, downward force will be constantly applied to the locking member. Even if it is not fixed to the stairway unit 40', it is only necessary to lock it so that it does not move downward, thereby facilitating the insertion of the movable cylinder 42.

Further, the locking member 43 does not have to be formed integrally, but the bottom plate 53 and the cylindrical body 48 may be formed separately and locked or supported without moving downward.

As described above, according to the present invention, the height (coarse) adjustment can be made for each stair unit individually, and the angle can be adjusted and fixed while the stair units are rotatable and stationary, making assembly work extremely easy. Since there is no risk of each stair unit falling off, especially when assembly is started from the upper unit, there is no need to attach support rods to the bottom of each unit to hold it until temporary assembly, leading to a significant reduction in assembly man-hours.

Furthermore, the present invention makes it extremely easy to make fine adjustments during the actual assembly after rough adjustments have been made through temporary assembly, which was extremely difficult with the prior art, and its practical value is extremely high.

[Brief explanation of drawings]

1 to 3 show the stair unit used in the present invention; FIG. 1 is a front partial sectional view, FIG. 2 is a plan view, and FIG. 3 is a sectional view showing an assembled state. FIG. 4 is a sectional view showing a conventional fixing mechanism, FIGS. 5 and 6 are embodiments of the present invention, FIG. 5A is a front sectional view, and FIG. 5B is an A of FIG. 5A.
-A' line sectional view, and FIG. 6 is a plan view. FIG. 7 shows another embodiment, FIG. 7A is a front sectional view, and FIG. 7B is a sectional view taken along the line B-B'. 21, 41: one cylinder, 22, 51: other cylinder, 23,
54: Element, 25, 46: Screw member, 26, 42
: Movable body, 33, 43: Locking member, 27, 28, 44,
45: Fixed member patent applicant: Keiichiro Yamazaki, patent attorney: Masahisa Takahashi

Claims (1)

[Scope of Claims] 1) Two cylindrical bodies in which the outer diameter of one cylinder is slightly smaller than the inner diameter of the other cylinder are disposed in parallel with vertically shifted positions, and the two cylindrical bodies are arranged in parallel with each other, and are orthogonal to each other. In a staircase unit in which an element with a flat upper surface is arranged, a screw member is formed at the upper end of a small diameter cylinder, the lower part is formed so as to be screwed into the threaded part, and a bolt hole is bored on the axis. A movable cylindrical body that can be freely engaged with a large diameter cylindrical body, and a locking member that is fixed to the large diameter cylindrical body to prevent it from moving downward, and has a bolt hole drilled on the axis. and a fixing member that fixes the movable cylinder and the locking member through bolt holes when clamped. 2) A structure in which the movable cylinder can rotate through the locking member. The stair unit fixing mechanism according to paragraph 1