JP2018021419A - Staircase handrail for work platform, and method for using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a staircase handrail capable of being used both in the case where a staircase is constructed in a single span and the case where the staircase is constructed in a continuous span, during the construction of a work platform.SOLUTION: A staircase handrail for being installed between supports constituting a wedge binding-type work platform includes at least a rod-like body part, a downside mounting part that is provided on the lower end side of the body part and wedge-fixed to a mounting hole of one support, and an upside mounting part that is provided on the upper end side of the body part and locked to a mounting hole of the other support. Regulation means is pre-provided for the downside mounting part to regulate displacement of the downside mounting part within the mounting hole during wedge-fixation to the mounting hole.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a stair rail used for a wedge-tight work scaffold and a method of using the same.

As a stair rail used for a wedge-tight work scaffold, there is an invention described in Patent Document 1 below.
FIG. 8 is a schematic view showing a conventional stair railing. (A) is a partial side view, (b) is a partial plan view.
As shown in FIG. 8, the stair railing described in Patent Document 1 includes a bar-shaped handrail main body a, a hook b provided at an upper end of the handrail main body a, and a lower end of the handrail main body a. It is comprised from the fixed metal fitting c which consists of the U-shaped frame c1 and the lock pin c2 which were provided.
And this stair railing is comprised so that the hook hook b and the lock pin c2 can be inserted in the same wedge hole e1 of the flange e provided in the support | pillar d when constructing a staircase with a continuous span. Therefore, the theme is that a plurality of continuous stair railings can be easily and easily installed.

Japanese Patent No. 5687279

However, in the case of the stair railing described in Patent Document 1, when the staircase is used at a site where the staircase is constructed with a single span, the lock pin c2 with the play f in the wedge hole e of the connecting portion e provided in the support column d Will be inserted.
Then, the stair railing is displaced in the wedge hole e1 due to the play f, which may cause troubles in ensuring the safety of the worker.
Therefore, the stair railing described in Patent Document 1 has a drawback that it is limited to use when the staircase is installed with a continuous span.

  Therefore, the present invention aims at providing a stair railing that can be used both when a staircase is constructed with a single span and when a staircase is constructed with a continuous span when a work scaffold is constructed. It is.

The first invention of the present application, which has been made to solve the above-mentioned problems, is a stair rail installed between columns constituting a wedge-tight work scaffold, and the column extends to the side of the column. A connecting portion having a mounting hole penetrating vertically, and the mounting hole is arranged with a stair railing from the lower layer side and a stair railing from the upper layer side by side in the extending direction of the connecting portion The stair railing has a bar-shaped main body, a lower mounting portion that is provided on the lower end side of the main body portion and is wedge-fixed to a mounting hole of one column, and An upper mounting portion that is provided on the upper end side and engages with the mounting hole of the other support column, and the lower mounting portion has a lower side in the mounting hole when the wedge is fixed to the mounting hole. At least a restricting means for restricting the displacement movement of the mounting portion. And it is characterized in and.
Further, according to a second invention of the present application, in the first invention, the lower attachment portion sandwiches the connecting portion from above and below and has an insertion space penetrating up and down, and a sandwiching body and the insertion space A wedge body that can be inserted into the mounting hole, and a projecting body that protrudes from the holding body, and the projecting body functions as the restricting means. It is.
According to a third invention of the present application, in the second invention, the sandwiching body and the projecting body are substantially U-shaped members, and are integrated by fitting the recess of the projecting body into the recess of the sandwiching body. It is characterized by having become.
According to a fourth invention of the present application, in the invention according to any one of the first to third inventions, the upper attachment portion is hooked to the connecting portion, and the hook body. An interference body positioned so as to protrude from the side to the side, and the interference body suppresses the displacement movement of the upper mounting portion in the mounting hole when locked to the mounting hole. It is characterized by this.
A fifth invention of the present application is a method of using a work scaffold using the stair railing according to any one of the first invention to the fourth invention, and when the work scaffold is constructed, Then, after the stair railing and the staircase are installed on the upper layer side, the movement to the upper layer is performed.
According to a sixth aspect of the present invention, there is provided a method for using a working scaffold using the stair railing according to any one of the first to fourth aspects, wherein the working scaffold is disassembled from the upper layer to the lower layer. After the movement, the stairs handrail and the stairs connecting the lower layer and the upper layer are removed from the lower layer side.
The seventh invention of the present application is characterized in that, in the fifth or sixth invention, the stair railing is attached to a connecting portion projecting inward of the stair in plan view.

According to the present invention, at least one of the following effects can be achieved.
(1) Suppressing the movement of the stair railing.
By providing a restricting means in the lower attachment portion, the lower attachment portion can be positioned when the lower attachment portion is wedge-fixed in the attachment hole.
Therefore, even when the stairs are installed with a single span, the movement of the stair railing can be suppressed and the safety of the worker can be ensured.
Further, if an interference body is provided in the upper mounting portion, the stair railing can be positioned more reliably, and the stair rail movement can be further suppressed.
(2) It can be used for both single span construction and continuous span construction of stairs.
Since the regulating means and the interference body do not interfere with the separate stair rail attached to the same mounting hole, the stair rail according to the present invention can be used even at the site where the stair is constructed with a continuous span.
(3) Production costs can be reduced.
By configuring the lower mounting portion with a sandwiching body, a wedge body, and a projecting body, and by configuring the projecting body to function as a restricting means, with a handrail equipped with the sandwiching body and the wedge body, etc. A stair railing can be manufactured by diverting a bracing member (diagonal material) to be used, other handrail materials, and a connecting material.
In addition, it is more preferable that the sandwiching body and the projecting body have substantially U-shaped members and are integrated by fitting them together in that the processing to the diversion source sandwiching body is less.
(4) Contribute to the improvement of worker safety.
Since the stair railing can be installed and removed from the lower layer side both at the time of constructing and dismantling the scaffold, it is not necessary for the worker to ascend and descend the staircase without the stair railing.

The schematic of the working scaffold using the stair railing which concerns on a present Example. The schematic sectional drawing of the support | pillar used in a present Example. The whole block diagram of the stair railing which concerns on a present Example. The schematic exploded view of a lower attachment part. Schematic of the state which has fixed the lower side attachment part to the support | pillar. Schematic of an upper attachment part. Schematic of the state where the upper mounting part is locked to the column Schematic which shows the conventional stair railing.

  Embodiments of the present invention will be described below with reference to the drawings.

<1> Configuration of Work Scaffold FIG. 1 shows the configuration of the work scaffold.
The wedge-type work scaffold shown in FIG. 1 includes a jack base A, a support column B, a connecting material C and a leading handrail D installed between the support columns B, and a cloth plate E and a cloth plate E that are locked to the connecting material C. It is comprised by members, such as the baseboard F installed around.
When the staircase G connecting the upper and lower layers is provided on this work scaffold, a staircase receiver H for receiving the staircase G and a stair railing I installed between the columns B on the side of the staircase G are installed. Yes.

<2> Column The column B has a connecting portion 20 for attaching the connecting material C, the leading handrail D, the staircase rail I and the like with a predetermined interval in the longitudinal direction of the column B.
The connecting portion 20 adopts a publicly known aspect such as an aspect in which a mounting hole penetrating up and down on a flat plate (flange type) and an aspect in which the inside of a cylinder opened up and down is an attachment hole (pocket type). Can do.

FIG. 2 shows a schematic cross-sectional view of the column used in this embodiment.
The support column B of the present embodiment employs the above-described flange type, and is provided with a connecting portion 20 formed of a flat plate projecting in a cross shape on the four sides of the pipe material 10. Each connecting portion 20 has an attachment hole 21 penetrating vertically. The connecting material C, the leading handrail D, the staircase handrail I and the like can be attached to the attachment hole 21.

<2.1> Mounting Hole The mounting hole 21 has an opening length L that allows a lower mounting portion 40 and an upper mounting portion 50 to be described later to be arranged in the protruding direction of the connecting portion 20. This is because when the staircase G is installed with a continuous span, the upper mounting portion 50 from the lower layer side and the lower mounting portion 40 from the upper layer side are attached to one mounting hole 21.

<2.2> Other Shapes In addition, the connecting portion 20 is formed with a taper 22 inclined downward to guide insertion into the mounting hole 21, a step surface 23 lowered by one step from the flange plane, and the like. . Since these are known techniques, a detailed description thereof will be omitted.

<3> Stair Handrail The stair handrail I is a member that constitutes a handrail for an operator who moves up and down the stairs by providing a predetermined inclination angle between the columns B constituting the work scaffold.
In more detail, the stair railing I is installed between the support columns B so as to be located on one side or both sides of the staircase G installed between the connecting material C and the stair support H. 20 is locked or wedge-fixed and installed so as to exhibit a predetermined inclination angle.

  The stair rail I according to the present invention is characterized in that, in the construction of the above-described work scaffold, the attachment / detachment work to the support column B by the worker can be performed from the lower layer side. Hereinafter, the details of the stair rail I according to the present invention will be described.

<3.1> Overall Configuration FIG. 3 shows an overall configuration diagram of the stair railing according to the present embodiment.
The stair railing I according to the present embodiment is mainly configured by the main body portion 30, the lower attachment portion 40, and the upper attachment portion 50. Details of each member will be described below.

<3.2> Main Body Part The main body part 30 is a member that becomes a handrail part when the worker ascends and descends stairs.
The main body 30 may be a known long member such as a steel pipe or a steel rod, and detailed description thereof is omitted.

<3.3> Lower attachment portion The lower attachment portion 40 is a member provided at the lower end of the main body portion 30.
The lower mounting portion 40 includes a mechanism for wedge-fixing to the connecting portion 20 provided on one of the columns B to be installed.
Further, the lower attachment portion 40 includes means (regulation means) for restricting the displacement movement of the lower attachment portion 40 in the connecting portion when the wedge is fixed to the one strut B.

FIG. 4 shows a schematic exploded view of the lower mounting portion. (A) is a schematic top view of a protrusion and a holding body, (b) is a schematic side view of a protrusion and a holding body, (c) is a schematic side view of a wedge body.
The lower attachment portion 40 in the present embodiment is roughly configured by a holding body 41, a wedge body 42, and a protrusion 43. And the said protrusion body 43 functions as the said control means. Details of each member will be described below.

<3.3.1> Nipping body The holding body 41 is a member for sandwiching the connecting portion 20 of the column B.
The sandwiching body 41 is made of a U-shaped member as viewed from the side, and the connecting portion 20 of the support column B is accommodated and sandwiched in the recessed portion (recessed portion 411).
The holding body 41 is provided with an insertion space 412 penetrating vertically, and the wedge body 42 is accommodated in the insertion space 412 so as to be movable up and down.
In addition, the holding body 41 includes a retaining portion 413 that is bent inward to interfere with the wedge body 42 in order to prevent the housed wedge body 42 from falling off, and the wedge body 42 in the insertion space 9211. Guide pins 414 for guiding the movement locus are provided.

<3.3.2> Wedge Body The wedge body 42 is a member for fixing the wedge to the connecting portion 20 of the column B.
The wedge body 42 has a front claw portion 421 that is inserted and driven into the attachment hole 21 of the connecting portion 20, and a slide portion 422 when the wedge body 42 moves up and down in the insertion space 412 of the holding body 41. doing.
The front claw portion 421 is configured to be tapered toward the mounting hole 21 by providing a taper so as to narrow toward the lower end.
The lower end of the slide part 422 has a hook shape, and the slide part 422 whose sliding direction is regulated by the guide pin 414 prevents the wedge body 42 from coming out by the hook part interfering with the stopper part 413. Configure.

<3.3.3> Protruding body The protruding body 43 is a member for functioning as the restricting means.
The projecting body 43 is configured to project from the holding body 41 and has a function of preventing the lower mounting portion 40 from moving in the mounting hole 21 when the wedge is fixed to the column B.
In preventing the protruding body 43 from shifting in the mounting hole 21, the interference of the protruding body 43 with any member depends on the size ratio of the column B and the connecting portion 20. In this embodiment, the member that interferes with the protrusion 43 is a separate connecting portion 20 adjacent to the connecting portion 20 that is wedge-fixed.

In the present embodiment, the protrusion 43 is configured by a substantially U-shaped member in plan view. By fitting the concave portion 431 of the projecting body 43 and the concave portion of the holding body 41, both are integrated.
Moreover, the front end surface 432 of the protrusion 43 according to the present embodiment has a shape corresponding to the curved shape of the connecting side 24 of the connecting portion 20 of the column B.

<3.3.4> Attached state to support column FIG. 5 is a schematic view of a state where the lower mounting portion is wedge-fixed to the support column. (A) is a partial front view around the lower attachment portion, and (b) is an enlarged plan view around the lower attachment portion.
The lower mounting portion 40 is wedge-fixed to any one of the four connecting portions extending in a cross shape on the side of the support column and extending in the front-rear direction of the work scaffold.
As described above, the attachment hole 21 of the connecting portion 20 has an opening length L for arranging the lower attachment portion 40 and the upper attachment portion 50 that are essential when the staircase G is provided in a continuous span.
Therefore, when the staircase G is provided with a single span, the lower attachment portion 40 is attached to the attachment hole 21, so that an extra space 211 is created in the attachment hole 21.
However, even if the lower mounting portion 40 tries to move laterally (laterally) in the connecting portion along the extra space 211, the protruding portion 43 is adjacent to the connecting portion 20 (20a) to be mounted. 20 (20b) is almost in contact with the mounting hole 21, so that the displacement movement in the mounting hole 21 is restricted.

Furthermore, in the present embodiment, the connecting side 24 connecting the connecting portions 20 has a curved shape, and the distal end surface 432 of the projecting body 43 also has a shape corresponding to the curved shape of the connecting side 24.
By setting it as such a shape, the contact area of the lower attachment part 40 and the connection part 20 can be increased, and stability of wedge fixation can be improved.

<3.4> Upper mounting portion The upper mounting portion 50 is a member provided at an end portion on the upper layer side of the main body portion 30.
The upper mounting portion 50 includes a locking mechanism for locking to the connecting portion 20 provided on the other column B among the both columns to be installed. A known structure can be adopted as the locking mechanism.

In FIG. 6, the schematic of the structure of the upper side attachment part which concerns on a present Example is shown. (A) is a schematic plan view, (b) is a schematic front view.
In the present embodiment, the upper mounting portion 50 is composed of a hook-shaped hook body 51 and an interference body 52 that is mounted on the concave portion of the hook body 51 so as to protrude sideways.

<3.4.1> Hook Body The hook body 51 is a member for locking to the connecting portion 20 of the column B.
The hook body 51 according to the present embodiment has a flange 511 having a hook-shaped tip, a contact surface 512 that comes into contact with the upper surface of the connecting portion 20, and a step above the contact surface 511. A surplus part forming surface 513.

<3.4.2> Interfering body The interfering body 52 is a member for holding the hook body 51 at a predetermined position of the connecting portion 20 of the column B.
The interference body 52 is attached to the flange portion 511 of the hook body 51 so as to protrude in the same direction as the extension direction of the connecting portion 20.
The length of the interference body 52 is shorter than the opening length of the mounting hole 21 of the connecting portion 20, and does not obstruct the insertion of the wedge body 42 when the lower mounting portion 40 is arranged in the same mounting hole 21. Keep it as a degree. The effect by this structure is mentioned later.

<3.4.3> Attached state to support column FIG. 7 is a schematic view of a state where the upper mounting portion 50 is locked to the support column. (A) is a partial front view around the lower attachment portion, and (b) is an enlarged plan view around the lower attachment portion.
The upper mounting portion 50 is locked to any one of the four connecting portions 20 extending in a cross shape to the side of the support column and extending in the front-rear direction of the work scaffold 20 (20a). ing.
The hook body 51 has the surplus portion forming surface 513 to suppress interference between the hook body 51 and the connecting portion 20 when the upper mounting portion 50 is detached.
The interference body 52 can suppress the displacement movement of the upper mounting portion to a minimum by contacting the inner wall of the mounting hole 21 and the outer peripheral surface of the tube material 10.

<4> Summary As described above, the stair railing according to the present embodiment is obtained by using the protrusion 43 provided in the lower mounting portion 40 and the interference body 52 provided in the upper mounting portion 50 to make the staircase G a single span. Also when installing with, the shift movement of the stair railing can be suppressed.
Further, when the stair rail according to the present embodiment is used at a site where the staircase G is installed in a continuous span, the protruding body 43 and the interference body 52 are separate staircase hands attached to the same mounting hole. There is no hindrance to detaching the slide.

<5> How to Use on Work Scaffold Next, referring to FIG. 1 again, a method of using the stair rail according to the present invention at the time of construction / disassembly of the work scaffold will be described.

<5.1> Method for constructing work scaffold The procedure for constructing a work scaffold is simplified as follows with reference to FIG. 1 again. Note that these procedures can be carried out by appropriately changing the order as long as there is no contradiction in work and safety can be ensured.
(S100) The jack base A is installed at a predetermined interval.
(S110) The column B is connected to the jack base A.
(S120) The connecting material C is disposed between the columns B.
(S130) The height of each support B is adjusted with the jack base A so that the connecting material C is horizontal, and the connecting material C is wedge-fixed to the support B.
(S140) The preceding handrail D is installed between the columns B.
(S150) The upper connecting material C and the leading handrail D are installed from the lower layer.
(S160) The upper-layer cloth board E and the baseboard F are installed from the lower layer.
(S170) It installs from the lower layer using the staircase G connected to the upper layer. The stairs G are locked to the connecting material C and the stairs receiver H installed in the direction between the beams of the columns.
(S180) The stair rail I is installed on the side of the stair G from the lower layer.
(S190) The worker moves to the upper layer.
(S200) A new support B is connected to the installed support B.
Thus, the work scaffold is constructed upward by repeating the above steps (S120) to (S200).

In the method according to the present invention, since the worker can install the stair rail I from the lower layer as in the above procedure (S170 to S190), the work is performed when ascending the stairs to move to the upper layer. Personnel are not at risk.
Further, since the stair railing I according to the present embodiment is provided with the restricting means including the projecting bodies 43 on both sides of the holding body 41, any one of the front step side and the rear step side of the work scaffold, and the direction of the stairs progressing. Installation is possible regardless of.
Therefore, the stair railing I can be installed on the connecting portion 20 in the inner side of the staircase G in a plan view, which contributes to ensuring the safety of workers.

<5.2> Procedure for dismantling the work scaffold When dismantling the work scaffold, the procedure of <5.1> above may be performed in reverse.
That is, in the method according to the present invention, since the worker can move the stair rail I after removing the stair rail I after moving from the upper layer to the lower layer with the stair rail I remaining, the worker is exposed to danger. It will not be.

A Jack base B Post 10 Pipe member 20 Connecting portion 21 Mounting hole 22 Taper 23 Step surface 24 Connection side C Connecting material D Leading handrail E Fabric board F Baseboard G Staircase H Staircase receiver I Stairway handrail 30 Main body portion 40 Lower side attachment Portion 41 Pinching body 411 Recessed portion 412 Insertion space 413 Stopping portion 414 Guide pin 42 Wedge body 421 Front claw portion 422 Slide portion 43 Projection body 431 Recessed portion 432 Top surface 50 Upper mounting portion 51 Hook body 511 Hook portion 512 Contact surface 513 Extra portion Forming surface 52 Interference body a Handrail body b Hook hook c Fixing bracket c1 U-frame c2 Lock pin d Post e Flange e1 Wedge hole f Play

Claims (7)

A stair railing installed between the pillars that make up the wedge-tight work platform,
The support column includes at least a connecting portion that protrudes to the side of the support column and has a mounting hole penetrating vertically. The mounting hole includes a stair railing from the lower layer side and a stair hand from the upper layer side. And has a shape that can be arranged side by side in the protruding direction of the connecting portion,
The stair railing is
A rod-shaped body,
A lower mounting portion that is provided on the lower end side of the main body portion and is wedge-fixed to the mounting hole of one of the columns;
An upper mounting portion provided on the upper end side of the main body portion and locked in the mounting hole of the other support column,
The lower mounting portion is
When the wedge is fixed to the mounting hole, it has at least a restricting means for restricting the movement of the lower mounting portion in the mounting hole.
Stair railing. The lower mounting portion is
A sandwiching body sandwiching the connecting portion from above and below and having an insertion space penetrating up and down;
A wedge body that can be inserted into the mounting hole through the insertion space;
A projecting body positioned so as to project from the holding body,
The protruding body functions as the restricting means,
The stair railing according to claim 1. The holding body and the projecting body are substantially U-shaped members,
It is integrated by fitting the concave portion of the projecting body into the concave portion of the holding body,
The stair railing according to claim 2. The upper mounting portion is
A hook body that is locked to the connecting portion;
An interference body positioned so as to protrude sideways from the hook body,
When the locking to the mounting hole, the interference body suppresses the displacement movement of the upper mounting portion in the mounting hole,
The stair railing according to any one of claims 1 to 3. A method of using a work scaffold using the stair railing according to any one of claims 1 to 4,
When constructing a work scaffold, from the lower layer side, the stair railing and the stairs are installed on the upper layer side, and then moved to the upper layer,
How to use the work scaffold. A method of using a work scaffold using the stair railing according to any one of claims 1 to 4,
At the time of dismantling the work scaffold, after moving from the upper layer to the lower layer, from the lower layer side, the stair railing and stairs connecting the lower layer and the upper layer are removed,
How to use the work scaffold. The stair railing is attached to a connecting portion that protrudes in an inner direction of the stair in plan view,
The use method of the work scaffold of Claim 5 or 6.

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