JP3869515B2 - Temporary stairs handrail mounting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temporary staircase handrail attachment device for attaching a temporary handrail post to a side frame of a temporary staircase in a construction work site or the like.
[0002]
[Prior art]
Conventionally, when attaching a column for a temporary handrail to the side frame of a temporary staircase, a mounting bracket is fixed to the lower end of the handrail column, a bolt hole is formed in the column mounting portion of the staircase side frame, and a column mounting bracket is installed. Was fixed to the column mounting portion of the side frame with bolts.
[0003]
[Problems to be solved by the invention]
In the conventional mounting apparatus as described above, since it is necessary to drill holes in the stair side frame one by one when mounting the handrail support column, it takes time and once the side frame is drilled, There was a problem that it could not be changed or adjusted.
[0004]
In view of the above, the present invention eliminates the need for under-processing such as perforation in the side frame of the temporary staircase, and allows the temporary handrail post to be attached to the desired position in the longitudinal direction of the staircase side frame so that the position can be adjusted. It is an object of the present invention to provide a mounting device for a temporary handrail for a staircase.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 is an attachment device for attaching the column 5 of the temporary handrail 2 to the side frame 3 of the temporary staircase 1, and grips the upper surface side of the staircase side frame 3 at the lower end of the handrail column 5. The upper clamp member 10 is fixed, and a lower clamp member 11 that holds the lower surface side of the staircase side frame 3 is pivotally attached to the upper clamp member 10 so that the upper clamp member 10 can be opened and closed. A fixing means for fixing is provided , and the fixing means is attached to the free end portion of either one of the upper and lower clamp members 10 or 11 and the staircase side frame 3 is gripped by the upper and lower clamp members 10 and 11. The upper clamp member 10 is composed of a pair of side surfaces sandwiching the handrail support 5 and is composed of a fastening bolt 12 that is screwed into a screw hole provided in the free end of the other clamp member 11 or 10 and fastens the staircase side frame 3. The L-shaped side plates 13 and 13 and the connecting plate portions 14, 15 and 16 that integrally connect the free end portions of the side plates 13 and 13 are formed in a substantially L shape in side view. Upper and lower bolt insertion holes 17 and 18 are provided on the base end side of each of the base ends, and the base end of the support 5 is sandwiched between the base end portions of both L-shaped side plates 13 and 13. Two fixing bolts 21, 21 are inserted into the corresponding bolt insertion holes of the column 5 from the two upper and lower bolt insertion holes 17, 18, and nuts 22, 22 are inserted into the projecting ends of these bolts 21, 21. Thus, the upper clamp member 10 is fixed to the handrail support column 15, and the lower clamp member 11 is disposed upside down with respect to the upper clamp member 10, and is positioned below the upper clamp member 10. There is a handrail post 5 A pair of side-view substantially L-shaped side plates 13 and 13 and connecting plate portions 14, 15, and 16 that integrally connect the free end portions of both side plates 13 and 13 are formed in a substantially L-shape in side view. In the state where the bolt insertion hole 17 is provided in the base end portion side of the both side plates 13 and 13 and the lower end portion of the support column 5 is sandwiched between the base end portions of both L-shaped side plates 13 and 13, A fixing bolt 21 is inserted from one bolt insertion hole 17 into a corresponding bolt insertion hole of the column 5, and a nut 22 is screwed into a protruding end portion of the bolt 21, whereby the lower clamp member 11 is an upper clamp member. In this case, a structure that is pivotally attached to a handrail support column 15 so as to be pivotable so as to be openable and closable with respect to 10 is adopted .
[0006]
According to a second aspect of the present invention, in the attachment device for the temporary stair railing according to the first aspect, the upper clamp member 10 and the lower clamp member 11 are formed in the same shape.
[0007]
Claim 3 employs a structure in which the fastening bolt 12 as the fixing means is mounted on the free end portion of the lower clamp member 11 in the attachment device for the handrail for temporary staircase according to claim 1 or 2. is there.
[0008]
According to a fourth aspect of the present invention, in the attachment device for the handrail for the temporary stair according to any one of the first to third aspects, the fastening bolt 12 as the fixing means is constituted by a butterfly bolt.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a temporary staircase 1 provided in a scaffold device R at a construction work site and a temporary handrail 2 installed on the temporary staircase 1. The temporary staircase 1 is composed of left and right side frames 3 and 3 and a plurality of step members 4 horizontally mounted between the side frames 3 and 3. Each side frame 3 has a substantially horizontal cross-section as shown in FIG. Each step member 4 is made of an aluminum alloy mold material having a substantially U-shaped cross section although the cross section is not shown.
[0010]
FIG. 2 shows a temporary handrail 2 that is integrally extended from both ends of a pair of handrail struts 5 and 5 on both sides, upper and lower ridges 6 and 7, and the upper ridge 6. Formed by overhanging rods 8 and 8 connected to lower portions of both handrail support columns 5 and 5, a handrail attachment device 9 is provided at the lower end portion of each handrail support column 5. These support | pillar 5, the horizontal rods 6 and 7, and the overhang rod 8 are formed with a steel pipe or an aluminum alloy pipe. Each handrail attachment device 9 fixes an upper clamp member 10 that grips the upper surface side of the staircase side frame 3 to the lower end portion of the handrail support column 5, and a lower clamp that grips the lower surface side of the staircase side frame 3 below it. The member 11 is pivotally attached to the upper clamp member 10 so as to be openable and closable, and a fixing means for fixing the upper and lower clamp members 10 and 11 to each other is provided.
[0011]
A preferable fixing means for fixing the upper and lower clamp members 10 and 11 to each other is attached through the free end portion of the lower clamp member 11 and the staircase side frame 3 is gripped by the both clamp members 10 and 11. The fastening bolt 12 is configured to be screwed into a screw hole of a nut 19 (see FIG. 3) provided at the free end portion of the upper clamp member 10 to fasten the staircase side frame 3. The fixing means is not limited to the fastening bolt 12 as in this embodiment as long as both the clamp members 10 and 11 can be fixed to each other.
[0012]
The detailed structure of the handrail mounting device 9 will be described with reference to FIGS. 3A to 3C. The upper clamp member 10 has a pair of substantially L-shaped side plates 13 in a side view on both sides sandwiching the handrail support column 5. , 13 and connecting plate portions 14, 15, 16 integrally connecting the free end portions of both side plates 13, 13 are formed in a substantially L shape in side view. Two bolt insertion holes 17, 18 are provided on the end side, and nuts 19 for screwing the fastening bolts 12 between the free ends of the side plates 13, 13 are connected to the connecting plate portion 16. The connecting plate portions 15 and 16 are provided with bolt insertion holes 15 a and 16 a that are coaxially formed with the nut 19.
[0013]
The lower clamp member 11 is formed in exactly the same shape as that of the upper clamp member 10, and is formed in the same shape as that of the upper clamp member 10. The side plates 13, 13 and the connecting plate portions 14, 15, 16 that integrally connect the free end portions of the side plates 13, 13 are formed in a substantially L shape in side view, and the base end side of the side plates 13, 13 The upper and lower two bolt insertion holes 17 and 18 are penetrated, and a nut 19 for screwing the fastening bolt 12 between the free ends of the side plates 13 and 13 is fixed to the connecting plate portion 16. Bolt insertion holes 15 a and 16 a are provided in the same shape as the nut 19. The upper and lower clamp members 10 and 11 are formed by pressing a steel plate and further appropriately welding it.
[0014]
The fastening bolt 12 attached to the free end portion of the lower clamp member 11 is a butterfly bolt having butterfly-shaped operation pieces 12a, 12a at the base end portion, and is a bolt insertion hole 15a on the connecting plate portion 15 side. From the screw hole of the nut 19 and the bolt insertion hole 16a on the connecting plate 16 side so as to be slidable in the axial direction, a screw part 12a is formed on the tip side. Therefore, the fastening bolt 12 only slides with respect to the free end portion of the lower clamp member 11 between the base end portion and the distal end screw portion 12a, and does not separate from the free end portion. In the figure, reference numeral 20 denotes a washer.
[0015]
In order to fix the upper clamp member 10 to the lower end portion of the support column 5, as can be seen from FIGS. 3A to 3C, the upper end side of the lower end portion of the support column 5 at the base end portions of both L-shaped side plates 13 and 13. Are inserted into the corresponding bolt insertion holes (not shown) of the column 5 from the two upper and lower bolt insertion holes 17 and 18 at the base end, The nuts 22 and 22 may be screwed into the projecting ends of the bolts 21 and 21 and fastened and fixed. Further, in order to pivotally attach the lower clamp member 11 to the lower end portion of the support column 5, the upper end of the lower end portion of the support column 5 is sandwiched between the base end portions of both L-shaped side plates 13 and 13, as with the upper clamp member 10. Then, the fixing bolt 21 is inserted into the corresponding bolt insertion hole (not shown) of the support column 5 from one bolt insertion hole 17 of the base end portion, and the nut 22 is screwed into the protruding end portion of the bolt 21. The lower clamp member 11 may be fastened and fixed so that it can be rotated. As a result, the lower clamp member 11 is moved to the closed position shown by the solid line in FIG. 3A and the open position shown by the phantom line in FIG. And can be opened / closed with respect to the upper clamp member 10.
[0016]
In attaching the handrail 2 to the side frame 3 of the temporary staircase 1 using the handrail attachment device 9 configured as described above, first, the lower portion of the handrail attachment device 9 attached to the lower end portion of each column 5. The clamp member 11 is rotated to the open position as shown by the phantom line in FIG. Thus, the handrail 2 is brought onto the side frame 3 of the temporary staircase 1, and the upper clamp member 10 of each handrail mounting device 9 is temporarily placed on the upper surface of the side frame 3, and then the lower clamp member 11. Is turned from the open position to the closed position to grip the lower surface side of the side frame 3, and then the tip screw portion 12 b of the fastening bolt 12 is connected to the nut 19 at the free end portion of the upper clamp member 10. The side frame 3 may be fastened and fixed by the upper and lower clamp members 10 and 11 so that the handrail 2 can be attached to the staircase side frame 3 easily and easily.
[0017]
As described above, when attaching the handrail 2, the upper clamp member 10 of each handrail attachment device 9 can be temporarily placed on the upper surface of the staircase side frame 3, so that the load of the handrail 2 is borne on the side frame 3. In addition, positioning with respect to a predetermined mounting position is simplified, and mounting work can be easily performed.
[0018]
According to this handrail attachment device 9, it is not necessary to make a hole or the like in the staircase side frame 3, and the required portions of the staircase side frame 3 are gripped from the upper and lower sides by the upper and lower clamp members 10 and 11. Since it is only necessary to fasten with the fastening bolt 12, the temporary work of the handrail 2 can be performed quickly and easily. In this case, since the fastening bolt 12 is composed of a butterfly bolt, a tool is not required to fasten the bolt, and the fastening operation can be performed quickly.
[0019]
In particular, in this handrail attachment device 9, the upper clamp member 10 is fixed to the handrail post 5, the lower clamp member 11 is pivotally attached thereto, and the fastening bolt 12 is not detached from the lower clamp member 11. The clamp members 10, 11 and the fastening bolts 12 do not fall off when the clamp members 10, 11 are opened to each other. Therefore, the clamp members 10, 11 and the fastening bolts 12 are not removed. There is no risk of losing. The fastening bolt 12 may be attached to the upper clamp member 10, but when attached to the lower clamp member 11, the upper clamp member 10 is attached to the upper surface of the side frame 3 when attached to the staircase side frame 3. Accordingly, after the lower clamp member 11 is manually rotated to the closed position, the fastening bolt 12 can be tightened as it is with the rotated hand, so that the mounting operation can be performed efficiently.
[0020]
Further, as can be seen from FIG. 3A, the handrail attachment device 9 has upper and lower clamp members 10 and 11 each formed in a substantially L shape in side view, and the handrail and the handrails. Since the staircase side frame 3 is held by the lower end side surface of the support column 5, the staircase side frame 3 can be securely fixed, and the handrail support column 5 can be firmly attached and fixed to the staircase side frame 3. In addition, the width of the upper and lower clamp members 10 and 11 can be made as narrow as possible, thereby simplifying the structure.
[0021]
Moreover, according to this handrail attachment device 9, since the upper clamp member 10 and the lower clamp member 11 are formed in the same shape, if one kind of clamp member is manufactured, only the direction of the clamp member is changed. Thus, it can be shared by both upper and lower clamp members, and can be attached to either the left or right side frame 3 of the temporary staircase 1, thereby reducing the manufacturing cost. The handrail mounting device 9 is composed of upper and lower clamp members 10 and 11 and fastening bolts 12 as fixing means. Since the number of parts is small and the structure is simple, the manufacturing cost can be further reduced. .
[0022]
In the embodiment described above, the upper and lower clamp members 10, 11 are formed in a substantially L shape in side view, and the staircase side frame 3 is held by the clamp members 10, 11 and the lower end side surface of the handrail support column 5. However, it is good also as a structure which can hold | grip the staircase side frame 3 only by the up-and-down both clamp members 10 and 11 without using the lower end part side surface of the support | pillar 5. FIG.
[0023]
Further, in this embodiment, the temporary handrail 2 is attached to the left and right side frames 3 and 3 of the temporary staircase 1, but the temporary handrail 2 is either one of the left and right side frames 3 and 3 depending on the situation of the scaffold device. Can be attached to. In addition, as the side frame 3 of the temporary staircase 1, besides the U-shaped cross section as shown, a square-shaped side frame can be used.
[0024]
【The invention's effect】
According to the handrail attachment device of the invention according to claim 1, it is not necessary to make a hole or the like in the staircase side frame, and the upper and lower clamp members hold the required portion of the staircase side frame from both the upper and lower sides. Thus, since both clamp members need only be fixed by the fixing means, the temporary handrail can be attached quickly and easily. Further, when attaching the handrail, the upper clamp member can be temporarily placed on the upper surface of the staircase side frame with the lower clamp member of the handrail attachment device opened, so that positioning on the staircase side frame can be easily performed. At the same time, the handrail can be easily attached and the attachment position can be adjusted.
[0025]
Further, in this handrail attachment device, since the upper clamp member is fixed to the handrail support column and the lower clamp member is pivotally attached thereto, the both clamp members drop off when the both clamp members are opened to each other. So there is no risk of losing it. Further, this handrail attachment device is composed of an upper and lower clamp member and a fixing means, and has a small number of parts and a simple structure, so that the manufacturing cost can be reduced.
[0026]
Also, as a fixing means, a screw provided through the free end of one of the upper and lower clamp members and provided at the free end of the other clamp member with the staircase side frame held by the upper and lower clamp members Since the fastening bolt that is screwed into the hole and fastens the staircase side frame is used, both the clamp members can be easily connected and fixed by simply screwing the fastening bolt into the screw hole and fastening, and the fixing means The structure becomes simple. Moreover, even if both clamp members are opened, the fastening bolt does not fall off and is not lost.
[0027]
In addition, the upper and lower clamp members are each formed in a substantially L shape when viewed from the side, and the staircase side frame is securely held by both clamp members and the lower end side surface of the support column. The handrail support column can be firmly attached to the staircase side frame and the width of the clamp member can be made as narrow as possible to simplify the structure.
[0028]
According to the second aspect, since the upper clamp member and the lower clamp member of the handrail mounting device are formed in the same shape, one type of clamp member is manufactured and the direction of the clamp member is changed during the mounting. As a result, it can be used for both the upper and lower clamp members, and can be attached to either the left or right side frame of the temporary staircase, thus further reducing the manufacturing cost.
[0029]
According to the third aspect, when the fastening bolt is mounted on the lower clamp member, the upper clamp member is placed on the upper surface of the side frame with the lower clamp member opened when the lower clamp member is opened. After the hand is turned to the closed position by hand, the fastening bolt can be tightened as it is with the turned hand, so that the mounting work can be performed efficiently.
[0030]
According to the fourth aspect, since the fastening bolt is a butterfly bolt, a tool is not required to fasten the bolt, and the fastening operation can be easily and quickly performed.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a use state of a handrail attachment device according to the present invention.
FIG. 2A is a front view of a temporary handrail, and FIG. 2B is a side view.
3A is a side view of a handrail attachment device, FIG. 3B is a front view, and FIG. 3C is a plan view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Temporary stairs 2 Temporary handrail 3 Stair side frame 5 Handrail support | pillar 10 Upper clamp member 11 Lower clamp member 12 Bolt for fastening

Claims (4)

An attachment device for attaching a support rail for a temporary handrail to a side frame of a temporary staircase, and fixing an upper clamp member for gripping the upper surface side of the staircase side frame to a lower end portion of the handrail support column, and a staircase side below that A lower clamp member for gripping the lower surface side of the frame is pivotally attached to the upper clamp member so as to be openable and closable, and a fixing means for fixing the upper and lower clamp members to each other is provided . It consists of a fastening bolt that is attached to the free end and is screwed into a screw hole provided in the free end of the other clamp member with the upper and lower clamp members gripping the stair side frame to fasten the stair side frame. The upper clamp member is formed in a substantially L-shape in side view by a pair of side-view substantially L-shaped side plates sandwiching the handrail support column and a connecting plate portion that integrally connects the free ends of both side plates. On both sides Two upper and lower bolt insertion holes are formed through each base end side, and the upper and lower two bolts at the base end portion are sandwiched between the base end portions of both L-shaped side plates. Two fixing bolts are inserted from the insertion holes into the corresponding bolt insertion holes of the struts, and nuts are screwed into the projecting ends of the bolts, whereby the upper clamp member is fixed to the handrail struts, and The lower clamp member is disposed upside down with respect to the upper clamp member, is located below the upper clamp member, and has a pair of substantially L-shaped side plates on both sides sandwiching the handrail column, and free ends of the two side plates. It is formed in a substantially L-shape when viewed from the side by a connecting plate part that connects the parts together, with bolt insertion holes penetrating on the base end side of both side plates, and a column at the base end of both L-shaped side plates Inserting one bolt at the base end with the bottom end of the A fixing bolt is inserted into the corresponding bolt insertion hole of the column, and a nut is screwed into the protruding end of the bolt so that the lower clamp member can be pivoted to open and close with respect to the upper clamp member. A device for attaching a handrail for temporary staircases pivotally attached to a support column .   The attachment device of the handrail for temporary staircases of Claim 1 with which the upper clamp member and the lower clamp member are formed in the mutually same shape.   The fastening device for the handrail for temporary staircase according to claim 1 or 2, wherein the fastening bolt as the fixing means is attached to the free end portion of the lower clamp member.   4. The temporary stair railing attachment device according to claim 1, wherein the fastening bolt as the fixing means is a butterfly bolt.

Images