JP2002146987A - Posterior attaching handrail support fixing fitting and posterior attaching handrail support fixing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a posterior attaching handrail support fixing fitting and a posterior attaching handrail support fixing method capable of tightly performing construction without any looseness. SOLUTION: One fixing leg 14 of proper length projecting a support holding wall 12 receiving the lower end of a handrail support 2 on the upper face of a board 11, drilling a slot-like bolt hole 13 on the substantial center of the board 11 and being projected around the bolt hole 13 in the direction of the bottom face of the board 11, and two mobile legs 15 capable of length adjustment screwing a projected and recessed screw shaft 18 in a screw hole 17 drilled in the board 11 are provided or the two fixing legs 14 and one mobile leg 15 are provided. The bolt hole 13 is outward inserted on an anchor bolt 3 built on an existing concrete building frame 1, when a fixing nut 4 screwed with the anchor bolt 3 is tightened to be fixed on the concrete building frame 1, the mobile leg 15 is adjusted to be projected and recessed, and height contacted on the existing concrete building frame 1 is adjusted to maintain horizontality.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for constructing a handrail for a rooftop parapet, a veranda of a building, a staircase or a slope, and more particularly to a retrofitting handrail support fixture and a retrofitting handrail support method.

[0002]

2. Description of the Related Art In general, when a handrail is installed upright by retrofitting, the lower end of the handrail support is held and fixed by fixing the handrail support fixture at a predetermined interval in the longitudinal direction of the upper surface of the existing concrete frame using a handrail support fixture. There are many things to do.

At this time, the fixing device of the handrail support fixing bracket is as follows.
In general, a handrail support fixture with bolt holes in the board,
The handrail support fixture, which is placed on the upper surface of the existing concrete frame in a face-to-face manner, is fastened and fixed to the concrete frame via the bolt hole. For example, it is provided with a hole-in anchor having a head or using a nut, and a fixing bolt such as an embedded bolt.

[0004] In this case, the handrail post fixing bracket is to be placed and fixed on the upper surface of the existing concrete body by surface contact, so that the handrail post fixing bracket is adjusted to the height standard position by the face contact placement to secure the level. be able to. For example, in a new building with an existing concrete skeleton upper surface that has been leveled out assuming that the handrail support fixtures have been fixed in advance, even if the handrail support fixtures can be fixed well, all new buildings can be used. Therefore, it cannot be expected that this leveling is always performed, and the situation of the concrete frame in the existing building is particularly diverse. In these cases, the fixing of the handrail support fixing bracket is not necessarily required. It is not always possible to use the device.

That is, in the existing building, the upper surface of the existing concrete skeleton has a wavy deformation in the longitudinal direction due to the hanging down of the beams between the columns, and no vertical railing is assumed. It often has a height difference due to a curved surface formed in the front-rear direction.

For this reason, even if it is attempted to fix the handrail support fixing bracket in order to retrofit the handrail for installing the handrail on the upper surface of the existing concrete skeleton including the existing building, it is necessary to perform the interview installation due to the height difference. The lack of the prerequisite horizontal surface makes it impossible to secure the height and level of the handrail support fixture, and as a result, it is often impossible to stand handrails or the like.

[0007] Therefore, in this case, repair work in the previous process of repairing the upper surface of the existing concrete skeleton horizontally with mortar is required again, and the work period is extended and the work is complicated.

In view of such circumstances, a handrail support fixture capable of securing the height and level by directly fixing the handrail support fixture regardless of the condition of the upper surface of the existing concrete frame has been developed. Have been. This handrail support fixture is conventionally known from Japanese Patent No. 2593767 as a support holder fixing device for a rear handrail.

That is, as shown in FIG. 7, a handrail support for a retrofitting handrail is provided with a bolt hole 52 and three or more screw holes 53 surrounding the bolt hole 52 on the outside of the board 51. The fixing bracket 50 and these screw holes are screwed so as to be able to protrude downward and downward respectively, and the lower end is abutted against the upper surface of the existing concrete skeleton 54 to absorb the height difference of the upper surface of the existing concrete skeleton 54, thereby fixing the handrail support. The metal fitting 50 is horizontally supported so as to be adjustable in height with respect to the upper surface 54 of the existing concrete frame, and the individual projection adjustment adjusting screw 55 corresponding to the number of screw holes and the handrail support fixing metal 50 for horizontal support are connected to the bolt holes. This is a handrail holder fixing device for a retrofitting handrail, comprising a fixing bolt 56 which is fastened and fixed to the upper surface of an existing concrete skeleton 54 via a 52.

[0010]

However, according to the above-mentioned conventional structure, since the individual projecting and adjusting screw 55, which is provided in advance for solving the problem, is independent of the handrail support fixture. The mortar must be supported until the mortar dries in order to make it easy to grind at the time of construction and to make it horizontal.Furthermore, fine adjustment by manually inserting the pieces with various thicknesses, for example, by the construction person In practice, there is a problem that the adjustment is difficult to be performed.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a retrofitted handrail support fixture and a retrofitted handrail support method which have an improved structure so as to be able to carry out the work accurately without causing any glare. It is the purpose.

[0012]

According to the present invention, there is provided a retrofitting handrail support fixture and a retrofitting handrail support method according to the present invention, in which a bolt hole is externally inserted into an anchor bolt established in an existing concrete body and screwed into the anchor bolt. In a retrofit handrail support fixture for fastening a fixing nut and fixed on a concrete frame, a support holding wall for receiving a lower end of a handrail support is protruded from an upper surface of a board, and an elongated hole is formed substantially in the center of the board. A fixed leg having an appropriate length protruding around the bolt hole in the direction of the bottom surface of the substrate, and a length adjustable by screwing a protruding screw shaft into a screw hole formed in the substrate. The main point is to provide one and two or two and one movable legs, and when fastening with the fixing nut to the anchor bolt, the height at which the movable leg is adjusted to protrude and abut against the existing concrete skeleton Adjust One is to maintain the horizontal.

The protruding and retracting screw shaft of the movable leg can be implemented by forming a headless structure having a screwdriver slit on the top surface and screwing into a screw hole of the substrate.

[0014] Further, in a retrofit handrail support fixture for fixing a bolt on the concrete skeleton by extrapolating a bolt hole to an anchor bolt established on the existing concrete skeleton and fastening a fixing nut to be screwed to the anchor bolt. A pillar holding wall for receiving the lower end of the handrail pillar is protruded from the upper surface, and an elongated bolt hole is formed substantially in the center of the board, and the bolt projects around the bolt hole toward the bottom of the board. The gist of the present invention is to provide a fixing leg formed of a projection having an appropriate length, and when the fixing leg is fastened to the anchor bolt with a fixing nut, the fixing leg is brought into contact with an existing concrete body to maintain the level.

[0015]

Embodiment 1 A first preferred embodiment of a retrofitted handrail support fixture and a retrofitted handrail support method according to the present invention will be described below with reference to FIGS. The retrofit handrail is interposed between the handrail main bodies provided on the existing concrete skeleton 1 and holds the lower end of the main body support 2 disposed at a predetermined position of the handrail main body. Hardware 1
In the longitudinal direction of the upper surface of the existing concrete skeleton 1 through the 0.

The backing handrail support fixture 10 is formed as an integral casting of an aluminum casting in which a support support wall 12 is provided upright on a substrate 11 so as to surround the support support. The rear handrail support fixture 10 is formed by drilling an elongated bolt hole 13 substantially at the center of the board. One fixed leg 14 and two movable legs 15 are provided at three locations surrounding the bolt hole 13. 15 is provided.

One fixed leg 14 has a projection 16 projecting from the substrate to the bottom side, and two movable legs 15 project and sink a screw shaft 18 into a screw hole 17 screwed into the substrate 11. Is screwed. The screw shaft 17 is provided with a screw shaft 18 which can be protruded and retracted downward, and a lower end thereof abuts against the upper surface of the existing concrete skeleton 1 to absorb a difference in elevation of the upper surface of the existing concrete skeleton 1. In connection with the length of the projection 16 of the fixed leg 14, the rear handrail support fixing metal 10 is horizontally supported so that the height can be adjusted.

The protruding and retracting screw shaft 18 uses a headless screw provided with a slot 19 on the top surface as a driver receiver, and is rotated from the upper surface of the substrate 11 using a driver to adjust the protruding and retracting. By this, the retrofit handrail support fixture 1
0 is height-adjusted and horizontally supported. Accordingly, the lower ends of the main body columns 2 can be vertically and reliably held and fixed in the longitudinal direction of the existing concrete skeleton 1 without any positional displacement due to a height difference.

Therefore, when the upper surface of the existing concrete skeleton 1 is inclined or curved, or when there is unevenness on the surface, regardless of the state of the upper surface of the existing concrete skeleton 1 to be fixed, it is correspondingly kept as it is. Vertically adjust the height and horizontal support of the rear handrail support fixture 10 by using
The operation of the movable legs 15 is performed.

The rear handrail support fixture 10 is mounted on the substrate 1
One of the bolt holes 13 is externally inserted into an anchor bolt 3 protruding from the existing concrete skeleton 1 and fastened and fixed to the upper surface of the existing concrete skeleton 1 via a washer by a fixing nut 4 screwed to the anchor bolt 3.

In this fixed state, the rear handrail support fixing bracket 10 is opposed to the upper surface of the existing concrete frame 1 by the fixed legs 14 and the movable legs 15 and 15 in a state where it is stretched so as to be freely adjustable in height. Since it is pulled and fixed by the bolt 3 and the fixing nut 4, it is securely and firmly fixed to the upper surface of the existing concrete skeleton 1.

[0022]

[Embodiment 2] Next, a retrofitting handrail support fixture 10 according to the present invention.
The second embodiment will be described. In the present invention, the number of the fixed legs 14 and the movable legs 15 projecting from the substrate is
And the number of movable legs 15 may be one (see FIG. 4), and the number of fixed legs 15 may be three (see FIG. 5). Also in this case, the bolt hole 13 is provided substantially at the center of the substrate 11.
Is drilled.

Further, the substrate 1 of the rear handrail support fixture 10 is provided.
The column holding wall 12 protruding from 1 is variously changed depending on the lower end shape of the column 2, and can be replaced with a column holding shape according to the cubic column (see FIG. 6).

[0024]

As described above, the retrofit handrail support fixture and the retrofit handrail support method according to the present invention use at least one of the height-adjusting legs protruding from the substrate as fixed legs. It has a feature that it can be securely fixed, and it is possible to carry out the work exactly without any unevenness, and the effect obtained by implementing the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a partially cut-away longitudinal sectional view showing an attached state of a rear handrail support fixture.

FIG. 2 is a plan view of a retrofitting handrail support fixture.

FIG. 3 is a bottom view of a retrofit handrail support fixture.

FIG. 4 is a partially cut-away perspective view of a rear handrail support fixing device according to the second embodiment.

FIG. 5 is a partially cutaway perspective view of a rear handrail support fixing device according to a third embodiment.

FIG. 6 is a perspective view, partially cut away, of a retrofitting handrail support fixing fitting showing the fourth embodiment.

FIG. 7 is a vertical cross-sectional view showing a conventional handrail support pillar fixing bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing concrete skeleton 2 Prop 3 Anchor bolt 4 Fixing nut 10 Retrofit handrail support fixture 11 Substrate 12 Prop holding wall 13 Bolt hole 14 Fixing leg 15 Movable leg 16 Projection 17 Screw hole 18 Protrusion screw shaft 19 Slotting

Claims (5)

[Claims] 1. A retrofit handrail support fixture for fixing a bolt on an existing concrete skeleton by externally inserting a bolt hole into an anchor bolt established on the existing concrete skeleton, fastening a fixing nut screwed to the anchor bolt, and fixing the nut on the concrete skeleton. A pillar holding wall for receiving the lower end of the handrail pillar is protrudingly provided on the upper surface, and an elongated bolt hole is formed substantially in the center of the board, and the bolt hole protrudes around the bolt hole toward the bottom face of the board. A fixed leg of length and a movable leg which can be adjusted in length by screwing a protruding and retracting screw shaft into a screw hole formed in the substrate, one and two, or two and one are provided, When fastening with the fixing nut to the anchor bolt,
A retrofitting handrail support fixture that adjusts the height of the movable leg to and from the existing concrete frame by adjusting the height of the movable rail, and maintains the level. 2. A retrofit handrail support fixture for fixing a bolt on an existing concrete skeleton by externally inserting a bolt hole into an anchor bolt established on the existing concrete skeleton, fastening a fixing nut screwed to the anchor bolt, and fixing the nut on the concrete skeleton. A strut holding wall for receiving the lower end of the handrail strut protrudes from the upper surface, and an elongated bolt hole is formed substantially at the center of the substrate, and the bolt hole protrudes around the bolt hole toward the bottom surface of the substrate. It is characterized in that one and two or two and one movable legs are provided, each having a fixed leg of an appropriate length and a movable leg having a screw hole formed in a substrate and a protruding and retracting screw shaft screwed into the screw hole, the length of which is adjustable. A method of fixing a rear handrail support, comprising: adjusting a movable leg in and out of position to adjust the height of the movable leg in contact with an existing concrete frame and maintaining the horizontal level when fastening the anchor bolt to the anchor bolt with a fixing nut. 3. The screw shaft of the movable leg has a headless structure in which a screwdriver slit is provided on the top surface, and is screwed into a screw hole of the substrate. Or 2
The attached handrail post fixing bracket and the attached handrail post fixing method described above. 4. A retrofit handrail support fixture for fixing a bolt on an existing concrete skeleton by externally inserting a bolt hole into an anchor bolt established on the existing concrete skeleton, fastening a fixing nut screwed to the anchor bolt, and fixing the nut on the concrete skeleton. A pillar holding wall for receiving the lower end of the handrail pillar is protruded from the upper surface, and an elongated bolt hole is formed substantially in the center of the board, and the bolt projects around the bolt hole toward the bottom of the board. It is characterized by providing a fixing leg consisting of a projection of an appropriate length of a book, when fastening with a fixing nut to the anchor bolt,
Retrofit rail fixing bracket that keeps the horizontal level by fixing the fixed legs to the existing concrete frame. 5. A retrofit handrail support fixture for fixing a bolt on an existing concrete skeleton by externally inserting a bolt hole into an anchor bolt established in the existing concrete skeleton, fastening a fixing nut screwed to the anchor bolt, and fixing the nut on the concrete skeleton. A pillar holding wall for receiving the lower end of the handrail pillar is protruded from the upper surface, and an elongated bolt hole is formed substantially at the center of the board. The present invention is characterized in that a fixing leg comprising a projection of an appropriate length of a book is provided, and when fastening with a fixing nut to the anchor bolt, the fixing leg is brought into contact with an existing concrete body to maintain the level and is horizontal. Attached handrail support method.