JP2523832Y2 - Fall prevention handrail - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drop-prevention handrail temporarily installed in an opening of a steel or wooden multi-story building at a construction site.

[0002]

2. Description of the Related Art Conventionally, floors such as deck plates are laid on beams at a construction site of a steel-framed multi-story building. However, the floor corresponding to the stairs remains open. Temporary handrails are installed in order to prevent accidents from falling from the floor, but these handrails are laid down on the floorboard to fix the mounting part to the beam part that forms the opening with bolts etc. It was necessary to lean on the floor or work on the stepladder from the lower floor, which was dangerous, and the work required tools such as a spanner, which was extremely troublesome.

At the construction site of a wooden multi-story building, joists are erected on beams and floor boards are laid, but the floor corresponding to the stairs is left open, and erection handrails and the like are provided around the stairs. It was extremely dangerous because the work was performed without attaching.

[0004]

[Problems to be Solved by the Invention] The present invention provides a handrail that can be attached and fixed to a beam part forming an opening in an easy working posture with one touch, and can also cope with an opening in a wooden building. It will not be provided.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the problem that the mounting operation based on the prior art is troublesome, and in the case of a steel structure, the mounting surface of the mounting portion to the beam portion provided at the lower part of the column is substantially provided. By vertically disposing a pair of columnar insertion protrusions, the upper insertion protrusion is fixed to a shaft that is vertically movably inserted into the mounting part, and the interval between the lower insertion protrusion and the lower insertion protrusion is made freely expandable and contractable. In order to joint the beam parts, a pair of insertion protrusions are used and applied by using two corresponding bolt holes that have been previously penetrated in series in the vertical direction of the rising part of the beam part. Can be attached and fixed to the beam simply by inserting it. In the case of wooden buildings, an insertion section that allows the pillar body to be detachable is fixed to a fixed plate with an inverted L-shaped cross section and the mounting section. And attaching the mounting portion to the mounting portion at the corner of the beam portion forming the opening. I, in the manner to attach fix the handrail to the opening, it is obtained by solving cents above drawbacks.

[0006]

According to the present invention, in the case of a steel building, a lower insertion protrusion is inserted into a lower one of bolt holes vertically penetrated in series at a beam portion to lower the shaft. When the upper insertion projection is pushed down into the appropriate part of the bolt hole while pushing down, the upper insertion projection is attached to the upper edge of the bolt hole by the spring, and the lower insertion projection is attached to the lower edge of the bolt hole. And the adjusting plate comes into close contact with the beam portion, and the mounting portion is attached and fixed to the beam portion, several columns are erected at predetermined positions of the opening, and the horizontal rod is adjacent to the column. It is erected between them and a handrail is temporarily installed at the opening.

In the case of a wooden building, a mounting portion is placed on the upper corner of the opening portion of the beam portion and nailed, several columns are erected at predetermined positions of the opening portion, and a horizontal rod is provided. It is erected between adjacent columns, and a handrail is installed temporarily at the opening.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes a handrail for preventing a fall according to the present invention, and the handrail 1 is an opening for installing a staircase A at a construction site. B, 2a,... Erected at the corner of B (additionally to the middle position if the interval is longer)
.. Are composed of stretchable horizontal rods 3, 3a... Installed between them, and the columns 2, 2a... Detachably mount the column main body 5 on a mounting portion 4 to a beam portion C forming an opening B. .

First, the mounting portion 4 will be described. Reference numeral 6 denotes a casing of the mounting portion 4. The casing 6 has a rectangular cylindrical base 7 and a cylindrical column main body provided on one side surface of the base 7. And a notch 10 having a predetermined depth below the upper center of the mounting surface 9 of the base 7 opposite to the insertion 8. A projecting hole 11 is provided at the center of the lower part.

Reference numeral 12 denotes an inner plate provided inside the base portion 7. The inner plate 12 has an oblong hole 13 formed at a position corresponding to the cut portion 10, and corresponds to the protruding hole 11 on the surface side. The lower insertion projection 14 is protrudingly provided at the position, and the lower insertion projection 14 is formed in a substantially cylindrical shape, and a part of a side surface is cut so as to have a substantially elliptical cross section except for a tip portion. A hook portion 15 is formed in the portion, and the peripheral edge of the tip is chamfered. The lower insertion projection 14 is screwed with a hexagon socket head cap screw 16 from the back side of the inner plate 12, and the hook portion 15 is lowered. Facing the inner plate 12 and projecting holes
It is screwed and fixed to the inner surface of the base 7 so that the insertion projection 14 below the projection 11 protrudes.

Reference numerals 17 and 17a denote guide blocks fixed on the back surface of the inner plate 12 and slightly outward from both ends of the oblong hole 13. The guide blocks 17 and 17a are provided with through holes in the center and in the vertical direction, respectively. 18 and 18a, and the insertion holes 18,
A shaft 19 is inserted through 18a so as to be vertically movable, and a disc-shaped pressing plate 20 is screwed to the upper end of the shaft 19.

Reference numeral 21 denotes an upper insertion projection similar to the lower insertion projection 14. The upper insertion projection 21 has a hook 22 formed at the tip and a chamfered peripheral edge.
Flat portions 23 and 23a are cut on both sides of the intermediate portion of 19 (between the guide blocks 17 and 17a).
The hook portion 22 is arranged at a right angle with respect to, and the hexagon socket head bolt 24 is screwed in from the other flat portion 23a side to fix the upper insertion protrusion 21 to the shaft 19, and The upper insertion protrusion 21 protrudes from the oblong hole 13 of the inner plate 12 and the cut portion 10 of the base 7, and a spring 25 is provided between the upper insertion protrusion 21 and the lower guide block 17a.
Due to the spring 25, the upper insertion projection 21 is
Abuts the upper edge of the

Reference numerals 26 and 26a denote caps provided on both the upper and lower sides of the base portion 7, and a through hole 27 for the shaft 19 is provided through the center of the upper one of the caps 26 and 26a.

Numeral 28 is a rectangular adjusting plate, which is screwed and fixed to the center of the mounting surface 9 (between the insertion projections 14 and 21), or the adjusting plate 28 is hinged and has a thickness. You may make it adjustable.

Reference numeral 29 denotes a flat portion provided so as to extend downward from above the side surface of the insertion portion 8, and the flat portion 29 is screwed with a stopper screw 30 of the column body 5 into the upper portion. Holes 31 and 31a are provided on the coaxial line of the hexagon socket head cap screw 16 for fixing the insertion projection 14.

Next, the support body 5 will be described.
2, 32a are mounting portions for the horizontal rods 3, 3a... Provided at the upper end portion and the intermediate portion of the column body 5, and the mounting portions 32, 32a are insertion plates at both ends of the horizontal rods 3, 3a. U-shaped mounting members 34, 34a,... Are fixedly mounted on three sides of the column body 5 so that the 33, 33a can be inserted from above.

Reference numeral 35 denotes a ring-shaped stopper provided at a lower portion of the column main body 5. The stopper 35 comes into contact with the upper end of the insertion portion 8 when the column main body 5 is inserted into the insertion portion 8. The vertical position of the support body 5 is regulated, and the stopper screw 30 is used.
And the tip of the stopper screw 30 is abutted to fix the column body 5.

Next, the mounting portion 4 of the drop prevention handrail according to the third invention will be described. Reference numeral 37 denotes a horizontally long rectangular frame-like pressing member loosely fitted to the mounting portion 4, and the pressing member 37 is used to hold a band plate. A back plate 39 is erected and fixed between both ends of a main plate 38 bent in a gate shape, and the main plate 38 is composed of a pair of long side plates 40 and 40a and a front plate.
41.

Reference numerals 42 and 42a denote support plates for a pressing body 37 fixed to both sides of the mounting portion 4. The support plates 42 and 42a have stepped portions 43 and 43a formed at both upper and lower ends. , 42a and the side plates 40, 40 of the pressing body 37 between the side faces of the mounting portion 4.
a is slidably inserted.

Reference numeral 44 denotes a screw rod which projects horizontally at a substantially central portion of the flat portion 29 of the mounting portion 4.
A wing nut 46 is screwed into a threaded rod 38 outside the back plate 39 while being inserted through an insertion hole 45 penetrating through the center of the back plate 39.

Next, the mounting part 4 of the drop prevention handrail according to the fourth invention is formed integrally with a cylindrical insertion part 47 and a vertically long flat plate 48 provided on the side surface of the insertion part 47. A flat plate 48 is fixedly mounted on the surface of a vertical member of a fixed plate 49 having an inverted L-shaped cross section,
The insertion portion 47 is the same as the insertion portion 8 except that the holes 31 and 31a are not provided.
It has the same configuration as

Are nail holes, and the nail holes 50, 50a
Are simply provided at appropriate intervals near both sides of the fixing plate 49, or the periphery of the nail holes 50, 50a is substantially tapered so that the edge of the hole protrudes toward the surface of the fixing plate 49. It may be raised and protruded.

Next, the operation of the handrails according to the present invention will be described. First, the support columns 2, 2a,... The lower insertion protrusion 14 is inserted into the lower one of the bolt holes D, Da,..., And then the shaft 19 is moved downward by pressing down the pressing plate 20, thereby pressing down the upper insertion protrusion 21, When the mounting portion 4 is pressed against the beam portion C, and the upper insertion protrusion 21 is inserted into an appropriate one of the bolt holes D, Da, and the hand is released, the hooks of the insertion protrusions 14 and 21 are released. The portions 15 and 22 contact the rear side of the rising portion, and the adjustment plate 28 abuts on the front side of the rising portion to sandwich the rising portion of the beam portion C. Hole D, Da ... The lower insertion protrusion 21 is a bolt at the upper edge. Are pressed against the lower edges of the holes D, Da, respectively. As a result, the mounting portions 4 are fixed to the beam portions C, and the columns 2, 2a,. Some are erected at predetermined positions.

Further, in the mounting part 4 of the drop prevention handrail according to the third invention, after inserting the insertion projections 14, 21 into the bolt holes D, Da... Screw in and push out the pressing body 37 to the beam part C side to make the front plate
41 is brought into contact with the beam portion C, and the rising portions of the beam portion C are sandwiched by the hook portions 15, 22 and the front plate 41,
The mounting part 4 is attached and fixed to the beam part C.

Then, the insertion plate 33 at one end of the horizontal rods 3, 3a is attached to the mounting portions 32, 32 of the adjacent one of the columns 2, 2a.
are inserted into the mounting members 34, 34a,..., and the horizontal rods 3, 3a are expanded and contracted so that the insertion plate 33a at the other end is mounted on the mounting portions 32, 32a of the other columns 2, 2a.
a ... and the horizontal rods 3, 3a ...
.., And the drop prevention handrail 1 is temporarily installed in the opening B.

When removing the drop prevention handrail 1, first remove the horizontal rods 3, 3a from the columns 2, 2a, and then push down the pressing plate 20 to move the shaft 19 downward. When the upper insertion protrusion 21 is pressed down and the columns 2, 2a,.
21 are removed from the bolt holes D, Da..., And the lower insertion projection 14 is removed from the bolt holes D, Da.

The bolt holes D, Da,... Of the beam portion C are not newly penetrated in order to install the handrail 1 of the present invention, but are already formed at the stage of manufacturing the steel material to be the beam portion C. The bolt holes D, Da... Are applied and used for mounting the mounting portion 4 of the fall prevention handrail 1, and there is no need to provide the bolt holes D, Da. The range of use of the handrail 1 is widened.

In the case of a wooden building, the horizontal member of the fixing plate 49 of the mounting portion 4 according to the fourth and fifth inventions abuts on the upper surface of the beam C, and the vertical member abuts on the inner surface of the beam C. The mounting portion 4 is placed on the upper corner of the beam portion C on the side of the opening B, and the nails 51, 51a are inserted into the nail holes 50, 50a, and are hit with a hammer or the like. 4 are nailed to the beam C, and several columns 2, 2a ... are erected at predetermined positions of the opening B, and the horizontal rods 3, 3a ... Temporarily set in B.

When removing the fall prevention handrail 1,
The nails 51, 51a,... Which have been driven in are pulled out by nailing or the like, and the mounting portion 4 is removed from the beam portion C and removed. In particular, in the mounting portion 4 according to the fifth invention, the head 52 of each nail 51, 51a,. Plank 49
Because it is located higher, the tip of the nail
And can easily be inserted between the head 52 and the nails 51, 51a.

[0028]

[Effects of the Invention] In short, the present invention provides a mounting portion 4 for the beam portion C.
Are provided between the columns 2, 2a,..., Which are removably inserted. If it is located at the corner of the room, it can be prevented from dropping from the opening B by attaching it to the two sides). In order to prevent a fall accident from the boundary between the stairs, the fall prevention handrail 1 can be attached to the beam portion C where the external stairs are provided.

A pair of substantially cylindrical insertion protrusions 14 and 21 are vertically arranged on the mounting surface 9 of the mounting portion 4, and
The upper insertion protrusion 21 is inserted into the shaft 19
Is fixed so that the distance between the lower insertion protrusion 14 and the lower insertion protrusion 14 can be freely increased and decreased.
Since the hooks 15 and 21 are provided on the upper end of the tip 21, the lower insertion projection 14 is inserted into the bolt holes D, Da... At predetermined positions, and the upper insertion projection 21 is pushed down by the lower movement of the shaft 19. , Into the bolt holes D, Da.
Can be erected in the opening B, so that there is no need for tools or equipment to fix the mounting part 4 to the beam part C. In addition, since the spring 25 is provided below the upper insertion projection 21, the insertion projections 14, 21 are pressed by the upper edge and the lower edge of the bolt holes D, Da. Therefore, the mounting portion 4 can be reliably fixed to the beam portion C.

Further, since the adjusting plate 28 is provided at the center of the mounting surface 9, if the thickness is adjusted by, for example, forming a hinge or overlapping, the thickness of the rising portion of the beam C can be accommodated. The adjusting plate 28 and the rising portion are always in close contact with each other, so that there is no backlash. Also, as described above, the insertion projections 14 and 21 are inserted into the bolt holes D and Da by the spring 25.
... The mounting portion 4 is pressed by the upper edge and the lower edge.
Can be firmly fixed to the beam portion C, and therefore can sufficiently cope with the acting force on the opening portion B side such as the operator leaning.

Further, a screw rod 44 is horizontally protruded from the mounting part 4, and the screw rod 44 is inserted through an insertion hole 45 of a rectangular frame-shaped pressing body 37 loosely fitted to the mounting part 4. Wing nut 46
Although it is extremely troublesome to fix and fix the adjusting plate 28 in accordance with the beam portions C having different wall thicknesses at the site, the mounting portion 4 of the present invention requires a wing nut after mounting. By screwing 46, the pressing body 37 is
If it is pushed out to the side and abutted against the beam portion C, it can be firmly fixed to the beam portion C, so that fine adjustment can be made in accordance with the thickness of the beam portion C, and therefore the thickness can be within the allowable range. Any beam portion C can be used.

A column 3, 2a,..., Which can be extended and contracted, is installed between columns 2, 2a,... Cylindrical column body 5
Are fixed to a fixed plate 49 having an inverted L-shaped cross section, and nail holes 50, 50a... Are formed through the fixed plate 49, so that the beam forming the opening B in the wooden building site is formed. By simply placing the mounting portion 4 on the upper corner of the opening B side of the portion C and nailing it, the drop prevention handrail 1 can be temporarily installed in the opening B without the joist.
The safety of the construction site can be improved.

Since the peripheries of the nail holes 50, 50a... Are raised so as to protrude toward the surface of the fixing plate 49, when the drop prevention handrail 1 is temporarily installed, the nails 51, 50a,. 51a…
The mounting part 4 can be firmly fixed to the beam part C even if the head 52 is not buried in the fixing plate 49 and is positioned above the fixing plate 49.
At the time of removal, there is a gap between the fixing plate 49 and the head 52 of each nail 51, 51a..., And the tip of the nail can be easily inserted into the gap, thereby facilitating the removal work. Its practical effects are enormous.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a fall prevention handrail according to the present invention is attached to a beam portion.

FIG. 2 is a sectional view taken along line WW of the above.

FIG. 3 is a front view of a mounting unit.

FIG. 4 is a plan view of the same.

FIG. 5 is a sectional view taken along the line XX in FIG.

FIG. 6 is a plan view showing an installation state.

FIG. 7 is a sectional view taken along the line YY of the above.

FIG. 8 is a sectional view taken along the line ZZ in FIG.

FIG. 9 is a front view of a casing.

FIG. 10 is a plan view of the same.

FIG. 11 is a front view of the inner plate.

FIG. 12 is a side view of a shaft.

FIG. 13 is a front view of a mounting portion of the drop prevention handrail according to the third invention.

FIG. 14 is a plan view of the same.

FIG. 15 is a sectional view along X1-X1 of FIG.

FIG. 16 is a perspective view showing a state in which the fall prevention handrail according to the fifth invention is mounted on a beam.

FIG. 17 is a front view of a mounting unit.

FIG. 18 is a plan view of the same.

FIG. 19 is a side view of the same.

FIG. 20 is a longitudinal sectional view of a main part showing an installation state.

[Explanation of symbols]

 2, 2a ... Prop 3, 3a ... Lateral rod 4 Mounting part 5 Prop body 9 Mounting surface 14 Lower insertion protrusion 15 Hook 19 Shaft 21 Upper insertion protrusion 22 Hook 25 Spring 28 Adjustment plate 37 Pressing body 44 Screw Rod 45 Insertion hole 46 Wing nut 47 Insertion part 49 Fixing plate 50, 50a… Nail hole C beam part

Claims (5)

(57) [Scope of request for utility model registration] 1. A stretchable horizontal rod is installed between columns, which are formed by detachably inserting a column main body into a mounting portion to be attached to a beam portion, and a pair of substantially cylindrical insertions is mounted on a mounting surface of the mounting portion. The projections are vertically arranged, and the upper insertion projection is fixed to a shaft that is vertically movably inserted into the mounting portion so that the distance between the lower insertion projection and the lower insertion projection can be freely increased and decreased. A drop-preventing handrail, wherein a hook portion is provided below an upper end portion of the upper and lower insertion protrusions, and a spring is provided below the upper insertion protrusion. 2. The handrail according to claim 1, wherein an adjusting plate is provided at a central portion of the mounting surface. 3. A screw bar is horizontally protruded from the mounting portion.
2. The handrail according to claim 1, wherein a screw rod is inserted into an insertion hole of the rectangular frame-shaped pressing body loosely fitted to the mounting portion, and a wing nut is screwed into the screw rod. 4. A stretchable horizontal rod is erected between pillars having a main body detachably inserted into a mounting portion to be attached to a beam portion, and the mounting portion is formed by reversing a cross section of an insertion portion of a cylindrical main body. A drop-prevention handrail fixed to an L-shaped fixing plate and having a nail hole penetrated through the fixing plate. 5. The handrail according to claim 4, wherein the periphery of the nail hole is raised so that the edge of the hole protrudes to the surface side.