JP3311742B1 - Main rope support with adjustable tilt - Google Patents

Abstract

An object of the present invention is to provide a main rope support that can adjust the inclination by making the inclination angle of the main rope support adjustable. SOLUTION: An inclination adjusting metal fitting 14 fixed to a lower portion of a column 34 having a main rope locking portion is pivotally attached to a holding metal fitting 1 by a horizontal axis 29, and a rotation position is adjusted around the horizontal axis 29. The support 34 is provided so as to be adjustable in a vertical state or an inclined state. Clamping fitting 1
The recess 2 is provided with an upward opening concave portion 2, and the lower portion of the tilt adjusting bracket 14 is disposed in the concave portion 2 and is pivotally connected by a horizontal shaft 29. Below the horizontal shaft 29, the lower end of the tilt adjusting bracket 1 is connected to the horizontal shaft 29. A female screw hole 26 is provided so as to be orthogonal, and a large-diameter male screw shaft 15 of the stepped bolt 12 is screwed into the female screw hole 26, and the large-diameter male screw shaft 15 is a side wall on the base end side forming the recess 2. It is configured to be able to move forward or backward between the portion 6 and the outer side wall portion 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main rope support having a tilt adjustable as a temporary safety device provided on a scaffold at a construction site of a structure or the like and used for hanging a main rope.

[0002]

2. Description of the Related Art Conventionally, for example, a main rope support attached to a beam upper flange at an intermediate portion of a beam erected between columns is as follows.
For example, JP-A-11-30043 or JP-A-2
The one disclosed in Japanese Patent Publication No. 000-34838 is known. In the case of Japanese Patent Application Laid-Open No. H11-30043, as shown in FIG. 7 (a), an upper portion of a clamping portion 42 composed of a clamp detachably fixed to a beam upper flange 41 and the like, A main rope support 46 of a type for firmly fixing the support 43 having the locking ring portion in an inclined state,
In the case of JP-A-2000-34838, FIG.
As shown in (b), the reinforcing core metal fitting 44 is mounted from above in the lateral direction on the upper part of the holding portion 42 formed of a clamp detachably fixed to the upper beam flange 41 and the like, and the support column 43 in the inclined state is attached. The main rope support 46 is of a type that is firmly detachably and firmly fixed by bolts and nuts 45.

As described above, the column 43 is inclined from the vertical direction to, for example, the outer side of the steel beam upper flange portion 41 by 5 to 20 degrees, so that the worker can safely use the steel beam upper flange 41 as a scaffold. When walking with tools, etc., waist width is about 450 mm to 750 mm and waist height is about 8 on average.
Since the distance is from 00 mm to 1000 mm, the struts 43 are inclined so as to keep an appropriate interval so as not to hinder walking and to prevent the master rope 40 from being too far away from the beam flange 41 in the lateral direction.

When the width of the beam upper flange 41 is large, the main rope column 46 having the column 43 standing vertically is used without using such a main column column 46.

[0005]

In any of the above-mentioned conventional cases, when the support portion is attached to the holding portion (clamp portion) 42, the support column 43 is of a fixed type whose position cannot be adjusted. For example, when the main rope supports 46 are symmetrically attached to the left and right ends (width direction) of the steel beam upper flange 41 corresponding to the width direction dimensions of the scaffold on the beam flange 41, etc., the steel beam flange width is narrow. In the case of the main column support is narrow, or when the steel beam flange width is wide, the main column support interval is wide, and it is difficult to make the upper part of the column easy to work. There is a problem that it is necessary to prepare a large number of separate support columns 46 each having a column 43 having an appropriate vertical state or an inclination angle corresponding to the flange width dimension to correspond to the steel beam flange width.

An object of the present invention is to provide a main rope supporting column which can adjust the inclination angle of the main rope column 46 so that the conventional disadvantage can be advantageously solved. It is.

[0007]

SUMMARY OF THE INVENTION In order to advantageously solve the above-mentioned problems, in a main rope support having an adjustable tilt according to the first aspect of the present invention, a clamp 1 fixed to a scaffold such as a steel flange. The tilt adjustment fitting 14 fixed to the lower part of the column 34 having the main rope locking portion is pivotally mounted on the horizontal axis 29, and is attached so as to be able to adjust the rotational position in the scaffold width direction around the horizontal axis. The support 34 is characterized in that its position is freely adjustable in a vertical state or an inclined state.

According to a second aspect of the present invention, in the first aspect of the present invention, the holding fitting 1 is provided with an upward opening recess 2, and the recess 2 is provided with a lower portion of an inclination adjusting fitting 14. Pivotally connected by a horizontal axis 29,
A female screw hole 26 is provided at the lower end of the inclination adjusting bracket 1 so as to be orthogonal to the horizontal axis 29. The large-diameter male screw shaft 15 of the stepped bolt 12 is screwed into the female screw hole 26. Combined and large diameter male screw shaft 15
Is characterized in that it is configured to be able to move forward or backward between the base side wall 6 and the outer side wall 7 constituting the recess 2.

Further, according to a third aspect of the present invention, in the second aspect, a slit 11 is provided in the outer side wall portion 7 so as to extend in a vertical direction, and the stepped bolt is provided in the slit 11. Small-diameter shaft part 1 in 12
3 is arranged, and the head of the stepped bolt 12 is located outside the outer side wall portion 7.

Furthermore, in the invention of claim 4,
In the invention according to any one of claims 1 to 3, a supporting surface for supporting the tilt adjustment fitting 14 is provided on a base side wall 6 of the holding fitting 1, and a stepped bolt 12 is provided. A counterbore is provided to support the tip of the
The outer side wall 7 has a bearing surface for supporting the tilt adjustment fitting 14 and a counterbore for supporting the rear end of the large-diameter male screw shaft 15 of the stepped bolt 14. It is characterized by being.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, an upwardly opening recessed portion connected to the slit is provided on an outer side wall portion of the holding member, and the inclined portion is inclined. It is characterized in that it is configured to be attachable to the clamping metal fitting with a stepped bolt screwed to the adjusting metal fitting.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the illustrated embodiments. FIGS. 1 to 6 show a main rope support having an adjustable tilt according to an embodiment of the present invention, and FIG. 1 is a front view of a main rope support having a tiltable vertical support.
2 (a) and 2 (b) are a left side view and a right side view, respectively. FIG. 3 is a partially enlarged vertical sectional front view of FIG. 1, and FIG. 5, FIG. 5 is a view showing a main part of the main rope supporting column whose inclination can be adjusted, and FIG. 6 is a partially enlarged longitudinal front view of FIG.

First, the clamp 1 used in the present invention will be described with reference to FIGS. 1 to 6 (particularly FIGS. 5A and 5B). An upwardly-opening concave portion 2 is provided at an upper portion on one side in the left-right direction of the U-shaped holding metal fitting 1, and a front wall portion 3 facing in parallel with an interval between front and rear sides forming the upwardly-opening concave portion 2.
And the rear wall portion 4 is provided with a through hole 5 for inserting the horizontal axis of
Is provided.

The inner peripheral surface from the lower middle to the upper inner circumferential surface of the left and right base side wall portions 6 and the outer side wall portions 7 connected to the front wall portion 3 and the rear wall portion 4 is arranged from bottom to top. Inner inclined surfaces 8 and 9 are provided so as to expand outwardly toward the outside, and the inclination angle of the inner inclined surface 8 in the side wall portion 6 on the base end side is different from the vertical axis with respect to the outer side wall portion. 7 is set to be larger than the inclination angle of the inner inclined surface 9.

At the center of the upper part of the outer side wall part 7 in the front-rear direction, there is provided an upwardly opening concave part 10 whose upper part is opened, and the side wall part 7 is connected to the upwardly opening concave part 10. A slit 11 which is opened so as to extend in the vertical direction is provided up to near the lower portion of the concave portion 2.
In this embodiment, the lower part of the recess 2 in the front-rear direction is configured to open. The width of the slit 11 is set to a relatively small width so that a small-diameter shaft portion 13 at an intermediate portion of the stepped bolt 12 described later can be inserted, and the large-diameter male screw shaft of the stepped bolt 12 is formed. The width of the male screw shaft portion 15 is set smaller than the outer diameter of the portion 15 so that the rear surface of the large-diameter male screw shaft portion 15 can be supported.

Further, on both sides of the slit 11 on the inner peripheral surface of the outer side wall portion 7, there are provided bearing surfaces for supporting one lower side surface (outer surface) of a later-described inclination adjusting bracket 14, and the stepped portion is provided. A bearing surface including a counterbore 47 on which the rear end surface of the large-diameter male screw shaft portion 15 of the bolt 12 is supported in a surface contact state is provided.

A support surface on which the other side surface of the lower part of the inclination adjusting bracket 14 described later is supported is also provided on the lower portion inside the side wall portion 6 on the base end side, and a large-diameter male screw shaft of the stepped bolt 12 is provided. A bearing surface including a counterbore 48 on which the distal end surface of the portion 15 is supported in a surface contact state is provided. The large-diameter male screw shaft portion 15 of the stepped bolt 12 is only between the inner surfaces of the proximal side wall portion 6 and the outer side wall portion 7, and is free to move in the front-rear direction. Of the small-diameter shaft portion 1 in the slit 11
3 is allowed because it can move up and down.

On the upper surfaces of the front wall 3 and the rear wall 4,
An arc-shaped support upper surface 16 is provided in the left-right direction. The arc-shaped support upper surface 16 has arc-shaped lower surfaces 10c and 10c on the front protruding portion 10a and the rear protruding portion 10b of the tilt adjusting bracket 14 (details will be described later).
d is slidably supported. On the other side (base end) of the clamp 1, an upper support 17 and a lower clamp 18 are vertically spaced apart from each other so as to protrude laterally integrally with the side wall 6. The upper inclined plate 17a of the upper support portion 17 is provided with a plurality of vertical through holes 23 at intervals in the front-rear direction.
In the lower horizontal plate 17b, the upper inclined plate 17a
A plurality of female screw holes 19 are provided at the same longitudinal center axis as the vertical through hole 23 and concentrically at an interval in the front-rear direction, and the female screw hole 19 is formed at its lower end with a substantially arc-shaped steel section. A bolt 21 provided with a pressing plate 20 by bolting or caulking is screwed into the head 21 of the bolt 21.
Has a hexagonal turning tool engagement surface and a turning rod insertion hole.

Next, the tilt adjusting fitting 14 which is mounted on the clamping fitting 1 in a state where the stepped bolt 12 is screwed and pivoted by a horizontal shaft 29 is shown in FIGS.
This will be described with reference to FIGS.

FIGS. 5 (c) and 5 (d) show that the upper part
4 shows a tilt adjustment fitting 14 which is fixed to the lower portion of the mounting bracket 4 and has the lower portion attached to the clamping fitting 1 and to which a stepped bolt 12 described later is screwed. A horizontal shaft insertion through-hole 25 is provided at an intermediate portion of the main body 24 so as to extend in the front-rear direction.
A lower arm 52 is provided at the lower part of the lower arm 52, which is provided so that the female screw hole 26 passes therethrough so as to intersect at a right angle at a position separated downward from the horizontal shaft insertion through-hole 25. .

The lower arm 52 of the metal fitting body 24
Is set smaller than the dimension between the base side wall 6 and the outer side wall 7, and one side surface (base side surface) 27 of the lower part of the bracket main body 24 is The metal fitting body 24 is turned around the horizontal axis 29 to be a flat surface that is supported in a surface contact state when it is engaged with the inner surface of the proximal side wall portion 6. Is rotated about a horizontal axis 29,
When it engages with the inner surface of the outer side wall portion 7, it is a flat surface that is supported in a surface contact state.

The base side surface from the middle part to the upper part and the outer side surface of the metal fitting body 24 have flat surfaces which are steeply inclined from the middle part to the upper part so as to expand outward from the lower part to the upper part. A base-side inclined surface 30 is provided, and a gently inclined flat outer inclined surface 36 is provided.

The base-side inclined surface 30 is an inclined surface which is supported or opposed to the inside inclined surface 8 of the base-side side wall portion 6 by surface contact, and the outer inclined surface 31 is a surface of the outer side wall portion 7. The inclined surface is supported or opposed to the inner inclined surface 9 by surface contact.

The angle at which the extension surfaces of the base-side inclined surface 30 and the outer inclined surface 36 intersect is slightly smaller than the angle at which the extension surfaces of the clamping metal fitting 1 and the inner inclined surfaces 7 and 8 intersect. The base inclined surface 3 is set to be small.
The distance between the upper end of the outer inclined surface 31 and the upper end of the inner inclined surface 7 of the clamp 1 is set smaller than the distance between the upper end of the inner inclined surface 7 and the inner inclined surface 8. The dimension between the lower end portions of the surface 30 and the outer inclined surface 31 is set smaller than the dimension between the lower end portions of the inner inclined surface 7 and the inner inclined surface 8 in the clamp 1, and the inclination adjusting bracket body Reference numeral 24 is configured to be rotatable about the horizontal axis 29 between the inner inclined surface 7 and the inner inclined surface 8 of the clamp 1.

On the upper part of the metal fitting body 24, a convex portion 33 for mounting a metal pipe is provided, and the lower end of a column 34 made of a metal pipe having a rectangular cross section is fitted and fixed to the convex portion 33. I have. A U-shaped attachment portion 39 of the parent rope locking bracket 37 is fitted into the upper end opening portion of the support post 34, and the bolt 40 inserted through the through hole of the support post 34 and the attachment portion 39 is provided. It is fixed by a nut, and on the upper part of the U-shaped mounting part 39, as a parent rope locking part,
A main rope locking ring 38 such as a closed ring is fixed by welding or the like,
The attachment part 39 and the parent rope locking ring 38 constitute a parent rope locking bracket 37.

The front and rear portions of the bracket main body 24 are provided with a front protruding portion 10a and a rear protruding portion 10b having an arc-shaped lower surface projecting forward in the horizontal direction. , 10b arc-shaped lower surfaces 10c, 10b
The support d is slidably mounted on the front and rear support upper surfaces 16 of the clamp 1 at a predetermined angle (in this embodiment, approximately 10 °, but in the range of 5 ° to 20 °, for example). It is configured to be.

FIG. 5E shows a stepped bolt 12 used in the above embodiment, which has a large-diameter male screw shaft portion 15 at the tip and a small-diameter shaft portion 13 at an intermediate portion. Stepped bolt 12.

At the rear end of the stepped bolt 12,
A head 35 having a rotating tool engagement surface 10a and a through hole 10b for inserting a rotating rod is provided. The axial length dimension d of the large-diameter male screw shaft portion 15 is
Is set shorter than the inner distance between the base side wall portion 6 and the outer side wall portion 7 so that it can be mounted from above the clamping metal body 1 while being mounted on the support 34 side. I have.

The length of the small-diameter shaft portion 13 at the intermediate portion is set so that the head 35 can be rotated outside the outer side wall portion 7 even if the inclination angle of the stepped bolt 12 changes. ing.

Large-diameter male screw shaft 1 of the stepped bolt 12
5 is screwed into the female screw hole 26 of the tilt adjustment fitting 14, and the lower part of the tilt adjustment fitting 14 is clamped so that the small-diameter shaft portion 13 is inserted into the slit 11 of the clamping fitting 1. The clamp 1 is mounted on the metal fitting 1 and
A horizontal shaft 29 composed of a pin is fitted over the horizontal shaft insertion through hole 5 and the horizontal shaft insertion through hole 25 of the inclination adjusting metal fitting 14, and a stopper 49 for retaining is abutted. Thus, the inclination adjusting fitting 14 is attached so as to be swingable in the left-right direction. The end of the horizontal shaft 29 composed of the pin may be rotatably fixed by caulking.

When the stepped bolt 12 is rotated so as to move forward toward the side wall 6 on the base end side,
As shown in FIGS. 1 and 3, the distal end of the large-diameter male screw shaft portion 15 of the stepped bolt 12 is supported on the inner surface of the side wall portion 6 on the base end side of the clamp 1, and further rotated. The tilt adjustment fitting 14 is rotated counterclockwise about the horizontal axis 29, and the other side surface 28 of the tilt adjustment fitting 14 is supported by the inner surface of the outer side wall 7 of the clamping fitting 1. At the same time, one of the inclined surfaces 3 of the inclination adjusting bracket 14 is provided on the inner inclined surface 8 of the side wall portion 6 on the proximal side.
0 is supported.

Conversely, when the stepped bolt 12 is rotated so as to retreat toward the outer side wall 7,
As shown in FIGS. 4 and 6, while the rear end of the large-diameter male screw shaft portion 15 of the stepped bolt 12 is engaged with the inner surface of the slit 11, the backward movement is stopped.
The tilt adjustment fitting 14 is relatively rotated clockwise about the horizontal axis 29, and the one side surface 27 of the tilt adjustment fitting 14 is supported on the inner surface of the side wall 6 on the base end side of the clamping fitting 1. At the same time, the other inclined surface 36 of the inclination adjusting bracket 14 is supported by the inner inclined surface 9 of the outer side wall 7. In any of the supporting states, if the distal end surface of the large-diameter male screw shaft portion 15 is used in a state where the distal end surface is firmly pressed or the rear surface of the large-diameter male screw shaft portion 15 is used in a firmly pressed state, the support column 34 is stable. In the state
The position is fixed.

Therefore, when the stepped bolt 12 is rotated to move forward from the state shown in FIGS. 4 and 6 in which the column 34 can be stably supported and the column 34 is inclined, the column 34 is rotated. 1 and 3 in the vertical state, and from the state of FIGS.
Is rotated so as to move backward, the column 34 is gradually inclined, and the inclined state shown in FIGS. 4 and 6 is obtained. In this embodiment, the support 34 is inclined at approximately 10 °. However, the support 34 may be inclined at, for example, 5 ° to 20 ° by using an appropriate tilt adjustment fitting 14.

In the above embodiment, the stepped bolt 12 for adjusting the angle is disposed below the horizontal axis 29. However, when the present invention is implemented, the front wall 3, the rear wall 4, and the base The end side wall portion 6 and the outer side wall portion 7 may be raised, and the stepped bolt 12 for angle adjustment may be provided above the horizontal axis 29.

In practicing the present invention, for example, an aluminum alloy is used as the clamp 1 and an aluminum alloy or steel is used as the inclination adjusting metal 14. For example, an aluminum alloy or steel pipe or the like is used.

In practicing the present invention, a pin is used as the abscissa 29, and after the pin is inserted, a bulging portion is formed so as to crimp the tip of the pin, so that the horizontal axis 29 cannot be pulled out. It may be.

[0037]

According to the main rope support of the present invention, the support of which can be adjusted is set up vertically or in an inclined state so as to spread outward according to the width of the beam flange such as a steel frame. Since it is possible for the worker to walk easily, workability is improved. In addition, since one inclination-adjustable main support can be installed corresponding to the width of a plurality of steel beam flanges or the like, the inclination can be adjusted economically.

Further, when the large-diameter male screw shaft portion of the stepped bolt is configured so as to be able to move forward or backward between the base side wall portion and the outer side wall portion of the clamping metal, as described in claim 2, The tilt adjustment fitting can be rotated to a predetermined position by effectively utilizing the front end and the rear end of the male threaded shaft.

According to the third aspect of the present invention, the stepped bolt is rotated from the outside of the clamp, and the stepped bolt moves forward or backward, and the stepped bolt is stepped with the rotation of the tilt adjusting bracket. Even if the angle changes due to the vertical rotation of the bolt, this can be allowed.

Further, according to the fourth aspect of the present invention, the tilt adjusting bracket can be stably supported on the clamping metal, and the tip of the stepped bolt and the large-diameter shaft portion of the stepped bolt can be supported. The rear end face can be engaged with a predetermined position in a stable state without displacement.

According to a fifth aspect of the present invention, when the outer side wall portion of the holding member is provided with an upward opening recessed portion connected to the slit, a stepped bolt is screwed into the inclination adjusting member. The stepped bolt can be prevented from being detached simply by attaching the horizontal axis to the clamping metal fitting and then to the clamping metal fitting and the inclination adjusting metal fitting.

[Brief description of the drawings]

FIG. 1 is a front view of a main rope support that can be tilted and adjusted so that the support is inclined outward.

FIGS. 2A and 2B are a left side view and a right side view, respectively.

FIG. 3 is a partially enlarged longitudinal sectional front view of FIG. 1;

FIG. 4 is a front view of a main rope support that can be tilt-adjusted with the support vertical.

FIGS. 5A and 5B are diagrams showing main parts of a main rope supporting column whose inclination can be adjusted, wherein FIG. 5A is a front sectional view of a clamp, FIG. 5B is a rear view, and FIG. (D) is a rear view of the tilt adjustment fitting, and (e) is a front view of the stepped bolt.

FIG. 6 is a partially enlarged longitudinal sectional front view of FIG. 4;

7 (a) and 7 (b) are front views of a conventional main rope support.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clamping fitting main body 2 Upward opening recessed part 2 3 Front wall part 4 Back wall part 5 Through hole for horizontal axis insertion 6 Side wall part on the base end side 7 Outside wall part 8 Inside inclined surface 9 Inside inclined surface 10a Front projection Part 10b Rear projecting part 11 Slit 12 Stepped bolt 12 13 Small diameter shaft part 13 14 Inclination metal fitting 14 15 Large diameter male screw shaft part 15 16 Support upper surface 17 Upper support part 17a Upper inclined plate 17b Lower horizontal plate 18 Lower holding part 19 Female screw hole 20 Press plate 21 Bolt 22 Head 23 Vertical through hole 24 Inclination adjustment fitting main body 25 Horizontal shaft insertion through hole 26 Female screw hole 27 One side surface 28 The other side surface 29 Horizontal shaft 30 Base side inclined surface 31 Front projection Part 32 Rear protruding part 33 Convex part 34 Prop 35 Head 36 Outer inclined surface 37 Parent rope locking bracket 38 Parent rope locking ring 39 Mounting bracket 40 Parent rope 41 Beam flange 42 Iron Beam 43 lifeline support column 44 core bracket 45 bolts and nuts 46 lifeline strut 47 counterbore 48 counterbore 49 retaining preventing stopper 50 Bolt 51 Bolt and nut 52 lower arm

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E04G 21/32

Claims (5)

(57) [Claims] 1. A tilt adjusting bracket fixed to a lower portion of a column having a main rope locking portion is pivotally attached to a holding bracket fixed to a scaffold such as a steel frame flange by a horizontal axis, and is centered on the horizontal axis. A tilt-adjustable main support strut, which is attached so as to be adjustable in a rotational position in a scaffold width direction, and wherein the strut is provided so as to be adjustable in a vertical state or an inclined state. 2. A concave portion is provided in the holding member, and a lower portion of the tilt adjusting member is disposed in the concave portion and is pivotally connected by a horizontal axis. Below the horizontal axis, a lower end of the tilt adjusting member is provided at a lower end portion of the tilt adjusting member. A female screw hole is provided so as to be orthogonal to the horizontal axis, and a large-diameter male screw shaft part of a stepped bolt is screwed into the female screw hole, and the large-diameter male screw shaft part is a side wall on the base end side constituting the recess. The tilt-adjustable main rope support according to claim 1, wherein the main rope support is capable of moving forward or backward between the portion and the outer side wall portion. 3. A slit is provided in the outer side wall portion so as to extend in a vertical direction, a small diameter shaft portion of the stepped bolt is disposed in the slit, and a stepped bolt is provided outside the outer side wall portion. The tilt-adjustable main rope support according to claim 2, wherein the head is configured to be positioned. 4. A supporting surface for supporting the tilt adjustment metal fitting is provided on a side wall portion on a base end side of the holding metal fitting, and a counterbore for supporting a tip end of a stepped bolt is provided. In addition, a bearing surface for supporting the inclination adjusting bracket is provided on an outer side wall portion, and a counterbore portion for supporting a rear end portion of a large-diameter male screw shaft portion of the stepped bolt is provided. The tiltable adjustable main rope support according to any one of claims 1 to 3. 5. An upside opening concave portion connected to the slit is provided on an outer side wall portion of the holding metal fitting, and is attached to the holding metal fitting with a stepped bolt screwed to the inclination adjusting metal fitting. The tilt-adjustable main rope support according to claim 3 or 4, wherein the main rope support is adjustable.