JP4321947B2 - Ladder equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ladder device that is attached to a pillar constituting a building and is used by an operator for ascending and descending along the pillar.
[0002]
[Prior art]
Various structures such as middle- and high-rise buildings and underground buildings include steel columns and steel beam members attached horizontally to the columns. A steel plate called a gusset plate is fixed to the support column by means such as welding, and the beam base is fixed to the plate using bolts or rivets in the factory or by welding. . A method of fixing a beam material body to a beam material base with bolts or rivets or fixing by welding after a column is laid vertically at a construction site, that is, a bracket method is often employed. In addition, a method in which the column with the gusset plate fixed is transported to the construction site with a truck, etc., and the beam is fixed to the gusset plate with the column laid vertically, that is, a non-bracket method is considered. In this case, the work of previously fixing the beam material base to the column becomes unnecessary, and the beam material is directly fixed to the gusset plate portion with respect to the column at the construction site.
[0003]
In any case, it is necessary for the worker to ascend and descend along the vertically laid struts. I am trying to attach it to. A plurality of types of ladder main bodies having different lengths are prepared, and a plurality of ladder main bodies are connected in accordance with the length of the column.
[0004]
As this ladder device, a ladder device as disclosed in Japanese Patent Laid-Open No. 3-217591 has been conventionally used.
[0005]
[Problems to be solved by the invention]
In this ladder apparatus, a construction lap, that is, a ladder main body is attached to a column via a mounting bracket, and this mounting bracket is detachably supported on the column side with a clamp for detachably fastening the ladder main body. And a connecting pin. When the support is made of steel, the pipe-shaped receiving piece into which the connecting pin is fitted is fixed to the outer surface of the support in advance by welding. In the case of a reinforced concrete support, the U-shaped cross section is used. The PC column receiving piece is fixed using anchor bolts.
[0006]
For this reason, in the conventional ladder apparatus, it is necessary to attach the receiving piece to the outer surface of the support in advance when the support is manufactured. On the other hand, after removing the ladder main body after the predetermined work is completed, the receiving piece is usually left on the support column and concrete is driven into the remaining part. When it protrudes in, there is a problem that it must be removed. In addition, since the position of the receiving piece cannot be changed when it is attached to the column, if the ladder of the ladder body interferes with the mounting bracket, it is necessary to devise measures such as connecting the ladder body of different lengths. Become.
[0007]
An object of the present invention is to enable a ladder main body to be detachably mounted without protruding and fixing a receiving piece on a column.
[0008]
[Means for Solving the Problems]
In the ladder apparatus of the present invention, a plurality of ladder main bodies each having a plurality of horizontal rails fixed between two side members and connecting portions provided at both upper and lower ends of the side members can be freely attached and detached along the corners of the columns. A ladder device to be attached to the two columns, having a side longer than the width of the column and a side shorter than the width of the column, and each contacting two outer surfaces perpendicular to each other of the column A pair of L-shaped support frame pieces, and fastening rods that detachably connect end portions of the two support frame pieces to form a support frame fastened to the support column together with the two support frame pieces A clamp member that is detachably connected to the side member of the ladder body is provided at one end, and two bar members that are provided at the other end with a connecting portion that is connected to the support frame; Connecting two bars And a mounting bracket that is detachably mounted on the support frame piece. The support frame that supports the mounting bracket can be removed from the support column, and the mounting bracket is removed from the support frame piece. It is characterized by obtaining .
[0009]
In the ladder device according to the present invention, the connecting portion is a pin, and a fitting hole into which the pin is fitted is provided in the support frame piece .
[0010]
The ladder device according to the present invention is characterized in that the fitting hole into which the pin is fitted is formed at a position at an equal distance from the corner of each of the support frames .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a front view showing a state in which a ladder body is mounted on a column using the ladder device of the present invention, and FIG. 2 is an enlarged cross-sectional view taken along line AA in FIG.
[0013]
FIG. 1 shows a part of a steel structure under construction, and horizontal beams 12 made of I-shaped steel are attached to the four surfaces of a steel pillar 11 having a quadrilateral cross section. . Each beam member 12 has a position corresponding to the slab floor of the building, and the beam member 12 is attached to the support column 11 at a plurality of positions at predetermined intervals in the vertical direction corresponding to the level of the building. In FIG. 1, the upper and lower beam members 12 are shown.
[0014]
The illustrated pillar 11 is located on the inside of the building, and beam members 12 are attached to the four pillars 11 in a cross shape on the four surfaces. However, the pillar 11 is attached to the pillar located on the outer side or corner of the building. Will be attached in a L-shape to two surfaces that are perpendicular to each other, with a T-shape on only three surfaces and a beam member attached thereto.
[0015]
As shown in FIG. 1, a gusset plate 10 is fixed to the support 11 in advance by welding so as to correspond to the position where the beam member 12 is attached, and a fastening member such as a rivet or a bolt is attached to each gusset plate 10. The beam member 12 is attached by using it.
[0016]
In FIG. 1, a beam material 12 having a short dimension is fixed to a gusset plate 10 in a factory in advance, and a beam material having a long dimension is connected thereto, and the beam material 12 is attached by a bracket method. In this case, a non-bracket method in which a long beam member 12 is fixed directly to the gusset plate 10 may be used.
[0017]
FIG. 3 is a perspective view showing a ladder, that is, a ladder main body 13. The ladder main body 13 is fixed between two side members 14 and 15 having a predetermined length and these side members 14 and 15 at predetermined intervals. A plurality of horizontal rails 16 are provided, and joint portions 17a and 17b are provided at both upper and lower ends. One joint part 17a is provided with a nut 18a, and the other joint part 17b is formed with a hole 18b through which a bolt passes.
[0018]
Therefore, the ladder main body 13 corresponding to the length of the column 11 can be assembled by connecting the plurality of ladder main bodies 13 using the bolts (not shown) at the joint portions 17a and 17b. A plurality of types of ladder main bodies 13 having different lengths are prepared, and the overall length of the ladder main body 13 after being connected can be adjusted.
[0019]
As shown in FIG. 2, a mounting bracket 21 is detachably or detachably connected to the side members 14 and 15 of the ladder main body 13, and this mounting bracket 21 is shown in FIG. is there.
[0020]
The mounting bracket 21 has two bar members 24 each having a clamp member 22 provided at one end and a connection pin 23 serving as a connecting part at the other end, and a connecting bar member 25 connecting these bar members 24. Each clamp member 22 has a clamp piece 26 that is rotatable about a hinge portion. The clamp piece 26 is fastened by a fastening bolt 27.
[0021]
Accordingly, when the clamp piece 26 is opened and the side members 14 and 15 of the ladder main body 13 are inserted into the clamp member 22 and the clamp piece 26 is closed and the clamp piece 26 is fastened by the fastening bolt 27, the ladder main body 13 is It will be attached to the mounting bracket 21.
[0022]
As shown in FIG. 2, the mounting bracket 21 is detachably attached to a support frame 31 that is detachably attached to the column 11, and this support frame 31 is shown in FIG. 5. Street.
[0023]
The support frame 31 has two L-shaped support frame pieces 32 having the same shape as each other, and each support frame piece 32 comes into contact with two outer surfaces of the column 11 that are perpendicular to each other. It is formed by welding a steel having an L-shaped cross section. However, you may make it form the support frame piece 32 with a square pipe.
[0024]
One L-shaped side 32a of each support frame piece 32 is set longer than the width dimension of the column 11, and the other side 32b is set shorter than the width size of the column 11, and the end of the shorter side 32b is set. The connecting plate 33 is welded to the part.
[0025]
As shown in FIGS. 2 and 5, the two support frame pieces 32 forming a pair are fastened to the column 11 such that one side 32 a is parallel to each other and the other side 32 b is parallel to each other. . Two fastening rods 34 are used to fasten the two support frame pieces 32 as a pair to the column 11, and each fastening rod 34 is formed by a bolt having a head portion 35 provided at one end and fastened. A nut 36 is screwed to the threaded portion of the rod 34.
[0026]
The connecting plate 33 is formed with a slit 37 into which the fastening rod 34 is inserted so that the head side of the fastening rod 34 is fastened. A through hole 38 through which the fastening rod 34 passes is formed at the end of the side 32 a of the support frame piece 32. Is formed. By providing the plurality of through holes 38 in the direction along the side 32a, the support frame piece 32 can be mounted on the plurality of support columns 11 having different width dimensions using the same support frame piece 32. However, the slit 37 may be a through hole and the through hole 38 may be a slit.
[0027]
Two fitting holes 39 are formed in each support frame piece 32, and each fitting hole 39 is formed at a position at an equal distance from the corner of the support frame piece 32. The linear distance 39 corresponds to the distance between the two connecting pins 23 of the mounting bracket 21.
[0028]
Therefore, when each connecting pin 23 of the mounting bracket 21 is fitted into a fitting hole 39 formed as a connected portion to the support frame piece 32, the mounting bracket 21 is a support frame 31 composed of two support frame pieces 32. Will be supported. Note that the connecting pin may be fixed at the position of the fitting hole 39, and a through hole into which the connecting pin is fitted may be formed in the bar member 24 of the mounting bracket 21. In that case, a rod 24 having a larger width than the illustrated case is used.
[0029]
In order to attach the ladder main body 13 to the column 11 using such a ladder device, after the column 11 is laid at a predetermined place, the two support frame pieces 32 and the two fastening rods 34 are used as shown in FIG. As shown, the support frame 31 is attached to the outer surface of the support column 11. At that time, as shown in FIG. 1, the stopper 40 is previously attached to the outer surface of the support column 11, and the support frame piece 32 is attached to the support column 11 so that the stopper 40 is in contact with the lower surface of the support frame piece 32. Anyway.
[0030]
However, the support frame piece 32 may be brought into contact with the upper surface of the beam member 12 without using the stopper 40.
[0031]
After the support frame 31 is fastened to the support 11, the attachment pin 21 is attached to the support frame 31 by fitting the connecting pin 23 of the attachment bracket 21 into the fitting hole 39 of the support frame 31. Thereafter, the side members 14 and 15 of the ladder body 13 are clamped to the clamp member 22 of the mounting bracket 21. However, the connecting pin 23 of the mounting bracket 21 may be fitted into the fitting hole 39 after the mounting bracket 21 is clamped to the side members 14 and 15 of the ladder body 13 in advance.
[0032]
In this way, as shown in FIG. 1, the ladder main body 13 can be mounted along the column 11, and when the ladder main body 13 is no longer needed after the predetermined construction work is completed, The ladder apparatus is disassembled by the reverse procedure. Therefore, the ladder body can be easily mounted without welding the receiving piece to the steel-made support 11 in advance or attaching the receiving piece to the reinforced concrete support in advance using the anchor bolt. The mounting process is unnecessary. Moreover, since the support frame 31 for supporting the mounting bracket 21 can be removed and reused after the construction work is completed, unnecessary waste material is not generated.
[0033]
The pair of support frames 31 have two support frame pieces 32, and each support frame piece 32 is provided with a fitting hole 39, so that the ladder body 13 is mounted at the position shown in FIG. It can also be mounted at a position diagonal to the position. If the support frame 31 is mounted at a position rotated 90 degrees with respect to the position shown in FIG. 2, the ladder body 13 can be mounted at a position rotated 90 degrees with respect to the position shown in FIG.
[0034]
It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.
[0035]
For example, although the illustrated support 11 is made of steel, the ladder main body can be mounted on a reinforced concrete support using the same ladder device .
[0036]
【The invention's effect】
In the present invention, the two support frame pieces and the fastening rods connecting both ends of the support frame pieces can be detachably attached to the column, and the mounting bracket connected to the connected portion of the support frame pieces The ladder body can be detachably attached. Thereby, it becomes unnecessary to previously attach the receiving piece for supporting the mounting bracket to the support column, and the mounting work of the ladder main body can be performed quickly.
[Brief description of the drawings]
FIG. 1 is a front view showing a state in which a ladder body is mounted on a column using a ladder device according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG.
FIG. 3 is a perspective view showing a ladder main body.
FIG. 4 is a perspective view showing a mounting bracket.
FIG. 5 is a perspective view showing a support frame.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Support | pillar 12 Beam material 13 Ladder main body 14,15 Side material 16 Horizontal beam 17a, 17b Joint part 18a Nut 18b Hole 21 Mounting bracket 22 Clamp member 23 Connection pin 24 Bar material 25 Connection bar material 26 Clamp piece 27 Fastening bolt 31 Support frame 32 Support frame piece 33 Connecting plate 34 Fastening rod 35 Head 36 Nut 37 Slit 38 Through hole 39 Fitting hole 40 Stopper

Claims (3)

A ladder in which a plurality of horizontal rails are fixed between two side members and a plurality of ladder bodies provided with connecting portions at both upper and lower ends of the side members are detachably mounted along the corners of the columns. A device,
Two L-shaped support frame pieces, each having a side longer than the width of the column and a side shorter than the width of the column, and each contacting two outer surfaces perpendicular to each other of the column;
A fastening rod that detachably connects the end portions of the two support frame pieces to form a support frame that is fastened to the support column together with the two support frame pieces;
A clamp member that is detachably connected to the side member of the ladder body is provided at one end, and two bar members that are provided at the other end with a connecting portion that is connected to the support frame, and these two bars A connecting bar for connecting materials, and a mounting bracket detachably attached to the support frame piece,
The ladder apparatus characterized in that the support frame supporting the mounting bracket can be removed from the support column and the mounting bracket can be detached from the support frame piece . 2. The ladder apparatus according to claim 1, wherein the connecting portion is a pin, and a fitting hole into which the pin is fitted is provided in the support frame piece . 3. The ladder apparatus according to claim 2 , wherein the fitting hole into which the pin is fitted is formed at a position at an equal distance from each corner of the support frame .

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