JP2704584B2 - Mounting device for temporary handrails for stairs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an installation device for a temporary handrail for stairs temporarily installed at a construction work site or the like.
In particular, the present invention relates to a mounting device for a temporary stair railing, in which a clamp fitted to an upper end of a stair side plate is attached to a lower end of a column of the temporary stair railing.

[0002]

2. Description of the Related Art Conventionally, in this type of handrail mounting apparatus, a main body of a clamp is fixedly attached to a lower end of a column of a temporary handrail by welding in a fixed direction, and accordingly, the handrail is attached. For example, if each clamp is mounted on the vertical side plate on both the left and right sides of the stair slope, so that it can be operated from the inside of the stairs, for example, the handrail on the left side and the handrail on the right side will have their clamp directions with respect to the lower end of the column mutually. Since the direction is reversed, two types of handrails for the left side and the right side are required. In addition, the side plate on the stair side is usually only the vertical side plate, but there is also a stair side plate having a horizontal overhanging side plate portion which extends horizontally outward from the upper end of the vertical side plate. If a handrail is to be mounted on the lower end of each column, another type of handrail with a clamp attached in a direction that can be fitted to the horizontal overhanging side plate is required. Since the directions of the clamps are reversed, two types of handrails, one for the left side and one for the right side, are required in this case as well. As described above, in the conventional mounting device, it is necessary to manufacture a handrail each time the direction of the clamp attached to the lower end of the column is different, so that there is a problem that the manufacturing cost of the handrail is extremely high.

In view of the above problems, the present invention can be applied to both the vertical side plate and the horizontal side plate portion on the stairs side by one type of handrail, and the clamping operation can be performed on either the inside or outside of the stairs. It is an object of the present invention to provide a mounting device capable of mounting a clamp from either the inside or outside of a vertical side plate so that the clamp can be performed from a required side.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, according to the present invention, a clamp is threaded through a U-shaped main body and one of two opposing legs of the U-shaped main body in a perspective direction with respect to the other leg. A push bolt, and a first posture in which this clamp is fixed to the lower end of the support by sandwiching a vertical side plate on the stairs side between the left and right sides of the lower end of the support and the push bolt. A second position in which the vertical side plate of the staircase is sandwiched and fixed between the left and right other side portions of the lower end of the column and the push bolt, and the staircase side between the push bolt and the main body leg opposed thereto is fixed. This adopts a configuration in which it is switchably attached to a third position in which the horizontally projecting side plate is sandwiched and fixed.

[0005]

Embodiments will be described with reference to the drawings.
FIG. 1 shows a handrail 1 installed on a steel frame staircase S. This handrail 1 is composed of a pair of divided handrails 1A and 1B which are connected so as to be adjustable in the lengthwise direction of the handrail. The handrail 1A is composed of handrail supports 2, 2 and upper and lower handrail horizontal members 3, 3 each formed of a steel pipe material, and the other divided handrail 1B is a steel pipe material of the one divided handrail 1A. It is composed of a handrail support 4 and upper and lower handrail cross members 5 and 5 formed of a steel pipe material smaller in diameter than each other, and each handrail cross member 5 corresponds to the corresponding handrail cross member of the divided handrail 1A. Each of the rails 3 is nested and fixed by a bolt or the like provided on the handrail cross member 3 at a required length.

[0006] At the lower end of each handrail post 2, 4 of the handrail 1, a mounting device according to the present invention as described below is mounted, and by this mounting device, each handrail post 2, 4 is provided.
Is attached to the vertical side plate P of the steel frame stairs S. The lower end of each handrail support 2, 4 is a steel frame staircase S
And is attached to the vertical side plate P such that the axis of the bent end is orthogonal to the length direction of the vertical side plate P. The handrail 1 shown in FIG. 1 is framed such that the handrail cross member 3 is not orthogonal to the handrail supports 2 and 4 and is inclined along the steel frame stairs S.
The railing to be installed on the landing of the stairs is framed so as to be orthogonal to the railing support, let alone the railing cross member, and the lower end of the railing support is attached to the vertical side plate of the landing by the mounting device. Can be In addition, since the attachment device attached to the handrail support 2 and the handrail support 4 is the same, hereinafter, only the attachment device on the handrail support 2 side will be described.

FIGS. 2 to 6 show the structure of the mounting device.
More specifically, this mounting device is composed of a clamp 6 that fits into the upper end of the vertical side plate P on the side of the stairs S or the horizontal extension side plate portion H that projects horizontally outward from the upper end of the vertical side plate. The clamp 6 includes a U-shaped main body 7 and a push bolt 8. The lower end of the handrail support 2 to which the clamp 6 is attached is formed by a metal rod 9 having the same outer diameter as the steel pipe material of the support 2, and the small-diameter shaft 9 a at the upper end of the rod 9 has a handrail. Prop 2
And is integrally fixed by welding or the like. Hereinafter, the lower end of the handrail support 2 is indicated by reference numeral 9.

As shown in FIG. 3, the clamp 6 is provided at the lower end 9 of the handrail support 2 between the left and right sides of the lower end 9 of the support and the push bolt 8 on the vertical side plate P on the step side. And a vertical side plate P on the stairs side between the first and second postures X and N and the push bolt 8.
And the second posture Y for clamping and fixing the push bolt 8
It is mounted so as to be switchable between three postures, that is, a third posture Z for sandwiching and fixing the horizontal protruding side plate portion H on the stair side between the U-shaped main body 7 and the leg portion 11 of the U-shaped body 7 opposed thereto.

The U-shaped main body 7 of the clamp 6 includes a pair of opposing legs 10 and 11 and a bridging portion 12 connecting the two legs 10 and 11.
The push bolt 8 is screwed and penetrated so as to be freely movable toward and away from the other leg 11. As shown in FIG.
The two legs 10, 11 and the bridging part 12 are composed of a pair of side plates M, M sandwiching the lower end 9 of the handrail support 2, and the leg 11 and the bridging part 12 on the side facing the push bolt 8. Locked holes 13, 14, and 15 are provided at two locations and at one corner between the leg 11 and the bridging portion 12. And the lower end 9 of the handrail support 2
When the clamp 6 is in the first position X or the second position Y as shown in FIG. 3, the two locked holes 15 and 13 in the corners and the leg 11 of the U-shaped main body 7 are formed. The retractable locking pins 16 and 17, which can be freely fitted and disengaged, and the two locked holes 15 and 14 in the corner portion and the bridging portion 12 of the clamp body 7 in the third position Z, respectively. And locking pins 16 and 18 which can be freely fitted and disengaged from each other.

The three retractable locking pins 16, 17, 18 disposed on the lower end 9 of the column are provided at equal intervals in the axial direction of the lower end 9 of the column. The distance from the locked hole 15 at the corner of the U-shaped body 7 to the locked hole 13 at the leg 11, and the distance from the locked hole 15 at the corner of the U-shaped body 7 to the bridge 12 The distance to a certain locked hole 14 corresponds to the three retractable locking pins 1.
6, 17, 18 are configured to be equal to each other.

Therefore, when the clamp 6 is attached to the lower end portion 9 of the support column in the first posture X as shown by the solid line in FIG.
Is removed from the locked hole 13 of the U-shaped main body 7, and the clamp 6 is rotated upward by 90 degrees around the middle retractable locking pin 16, thereby obtaining the second position indicated by the imaginary line in FIG. The position is switched to the three positions Z, and in this position Z, the locked hole 14 of the U-shaped main body 7 may be fitted to the retractable locking pin 18 on the upper side of the lower end portion 9 of the column.

FIGS. 4 and 6 show the retractable locking pin 1.
This figure shows a mounting structure of 6, 17, 18 in which a screw hole 19 is provided at a predetermined position of a lower end portion 9 of a support made of a metal rod in a diametrical direction through the lower end portion 9 of the support.
A pair of left and right screw sleeves 21 and 21 each having an engaged step 20 formed at the outer end of the inner peripheral surface are screwed symmetrically on both sides, and the inner ends are engaged in the respective screw sleeves 21. Each retractable locking pin 16, 17, 18 having a step 22 formed therein
Are inserted slidably in the axial direction, and a coil spring 24 is interposed in a compressed state between opposing inner end recesses 23 of each of the retractable locking pins 17, whereby each of the retractable locking pins 16, 1
7 and 18 are always protruded from the outer peripheral surface of the lower end portion 9 of the support column by a predetermined length by the urging force of the coil spring 24. Therefore, when each of the retractable locking pins 16, 17, and 18 is fitted into the locked hole, the protruding end of the locking pin is pressed to temporarily retract into the screw sleeve 21. Good.

As shown in FIGS. 3 and 5, at the inner end of the leg 10 of the U-shaped main body 7, a fixing piece 25 having a bolt insertion hole 25a is provided between the two side plates M. A nut 26 is fixed to the fixing piece 25 concentrically with the bolt insertion hole 25a, and the push bolt 8 is screwed to the nut 26. A disc spring 27 is rotatably mounted on the tip of the push bolt 8.

Next, the usage of the handrail mounting device having the above-described configuration will be described. First, as shown in FIG. 7, when attaching the handrail 1 to the left and right vertical side plates P, P of the stairs, the handrails 1 are attached with the push bolts 8 protruding inward so that the clamping operation of each clamp 6 can be performed from the inside of the stairs. In this case, as for the handrail 1 to be attached to the right vertical side plate P in FIG. 7, each clamp 6 is fixed by sandwiching the vertical side plate P between the push bolt 8 and the left side of the column lower end 9. It is fixed to the vertical side plate P by mounting in one posture X and tightening the push bolt 8. In the first posture X, of the three retractable locking pins 16 to 18 at the lower end portion 9 of the column, the two locking pins 16 and 17 on the middle side and the lower side are connected to the U-shaped main body 7. The two locked holes 15 and 13 in the corner portion and the leg portion 11 are fitted respectively.

As for the handrail 1 to be attached to the left vertical side plate P in FIG. 7, each clamp 6 is fixed by sandwiching the vertical side plate P between its push bolt 8 and the right side of the lower end 9 of the column. And push bolt 8 in the same manner.
Tighten and fix. In the second posture Y, the direction of the clamp 6 with respect to the lower end portion 9 of the column is opposite to the first posture X, but the positional relationship between the retractable locking pin and the locked hole is the same. That is, the two locking pins 16, 17 on the middle and lower sides of the lower end portion 9 of the column are fitted into the locked holes 15, 13 of the U-shaped main body 7, respectively. Therefore, the first posture X
In order to switch the direction of the clamp 6 to the second posture Y, the retractable locking pins 16 and 17 are detached from the locked holes 15 and 13 in the first posture X, and the clamp 6 is
Can be rotated 180 degrees around the lower end 9 of the support.

In FIG. 7, each clamp 6 is connected to a push bolt 8
Is installed so that it protrudes inside the stairs,
When the push bolt 8 is attached so as to protrude outside the stairs, the push bolt 8 may be attached in any one of the first posture X and the second posture Y.

Next, when the handrails 1 are to be attached to the left and right horizontal overhanging side plate portions H, H of the stairs as shown in FIG. It is attached to the column lower end 9 in a third posture Z in which the horizontal extension side plate H is sandwiched and fixed between the bolt 8 and the main body leg 11 opposed thereto. In this case, the right handrail 1 and the left handrail 1
In, the direction of the clamp 6 with respect to the lower end portion 9 of the column is opposite to the left and right as shown in the figure.

In the third position Z of the clamp 6 shown in FIG.
Upper and middle retractable locking pins 1 at lower end 9 of support column
8 and 16 are fitted into the locked holes 15 and 13 of the U-shaped main body 7, which is because the clamp 6 is in the first posture X shown on the right side of FIG. 7 or on the left side of FIG. In this state, only the lower locking pin 17 on the lower side of the column lower end 9 is disengaged from the locking hole 13 of the U-shaped main body 7 from the state of being attached in the second posture Y, and the middle row is retracted. Free lock pin 16
By rotating the clamp 6 upward by 90 degrees around the center, the clamp 6 can be easily and easily switched to the third position Z as shown in FIG.

Of course, in the clamp 6 in the first position X or the second position Y, the upper and middle upper and lower retractable locking pins 18 and 17 of the column lower end 9 are locked by the U-shaped main body 7. The clamps 6 in the third position Z may be fitted in the holes 15 and 13, and the retractable locking pins 16 and 17 on the middle and lower sides of the lower end 9 of the column may be covered by the U-shaped main body 7. Lock hole 15, 1
3 may be fitted.

The lower end 9 of each column 9
The two retractable locking pins 16, 17, 18 have the same vertical spacing, and the distance between the locked hole 15 in the corner of the main body of the clamp 6 and the locked hole 13 in the leg 11 is equal to the distance. , From the locked hole 15 in the corner of the main body to the bridging portion 12
And the distance to the locked hole 14 in the locking pin 1
6, 17, 18, the switching between the first position X, the second position Y, and the third position Z can be performed by the retractable locking pins 16, 17, 18 and the locked holes 13, 14,. 15 can be easily and easily performed.

FIG. 9 shows that the lower end 9 of the supporting column
This shows an example in which the retractable locking pins 16 and 17 are disposed at two places, and these two retractable locking pins 16 and 17 are provided.
The locked hole 15 at the corner of the U-shaped main body 7 and the leg 1
1 and fit into the locked holes 13 in the respective holes. Also in this case, the distance from the locked hole 15 in the corner of the main body to the locked hole 13 in the leg 11 and the locked hole 15 in the corner of the main body.
From the distance to the locked hole 14 in the bridging part 12
Since the distance between the retractable locking pins 16 and 17 is equal to each other, the switching between the first posture X, the second posture Y, and the third posture Z is performed by the retractable locking pins 16 and 17. Stop hole 1
It can be easily and easily performed by the operation of engaging and disengaging 3, 14, and 15.

[0022]

In the mounting device according to the first aspect of the present invention, the clamp is arranged so that the vertical side plate on the stairs side is provided between the lower end of the column and one of the left and right sides of the lower end of the column and the push bolt. A first posture for pinching and fixing, a second posture for pinching and fixing a vertical side plate on the stair side between the left and right other side portions of the lower end of the column and the push bolt, and the push bolt and facing thereto In order to attach the handrail to the left and right vertical side plates of the stairs, for example, each of When mounting with the push bolt protruding inward so that the clamp operation of the clamp can be performed from the inside of the stairs, for the handrail to be attached to the right vertical side plate, each clamp is attached in the first position X, and the push bolt is attached. To It can be fixed to the vertical side plates by attaching fit. As for the handrail to be attached to the left vertical side plate, each clamp 6 may be attached in the second posture Y, and the push bolt may be similarly tightened. Also, when each clamp is mounted so that its push bolt projects outside the stairs, it may be mounted in any one of the first posture X and the second posture Y.

Thus, according to the mounting device of the present invention,
Clamps are provided at the lower end of each support column in the first position X and the second position Y
And one of the handrails that can be freely switched to the third position Z, it can be applied to both the vertical side plate and the horizontal overhanging side plate part on the stairs side, and the clamping operation needs to be performed either inside or outside the stairs. The clamp can be mounted on either side of the vertical side plate so that it can be performed from the right side.

According to the second aspect, the switching operation between the first position, the second position, and the third position is performed by the operation of fitting and disengaging the retractable locking pin at the lower end of the column and the locked hole. It can be done easily and easily.

According to the third aspect, of the three retractable locking pins at the lower end of the column, two of the middle and lower locking pins are connected to the corners and legs of the U-shaped main body. In the first position or the second position respectively fitted in the two locked holes, the lower locking pin alone is disengaged from the locked hole of the main body leg, and the middle locking is performed. By rotating the clamp 90 degrees upward about the pin,
The user can easily and easily switch to the third position. In this third position, the upper locking pin at the lower end portion of the column is fitted and fixed in the locked hole in the bridging portion of the U-shaped main body. The first position or the second position Y can be switched by detaching from the locked hole and rotating the clamp 90 degrees downward about the middle side locking pin.

[Brief description of the drawings]

FIG. 1 is a side view showing a handrail attached to a stair.

FIG. 2 is an enlarged view of a portion indicated by an arrow A in FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 1;

FIG. 4 is an enlarged sectional view taken along line CC of FIG. 2;

FIG. 5 is a perspective view showing a U-shaped main body of the clamp.

FIG. 6 is an exploded perspective view showing a mounting structure of a retractable locking pin.

FIG. 7 is a front view showing an example of use of the mounting device.

FIG. 8 is a front view showing another example of use.

FIG. 9 is a front view showing still another usage example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Handrail 2 Handrail support 4 Handrail support 6 Clamp 7 U-shaped main body 8 Push bolt 9 Support pillar lower end part 10 Leg part 11 Leg part 12 Bridge part 13 Locked hole 14 Locked hole 15 Locked hole 16 Retractable locking pin 17 Retractable locking pin 18 Retractable locking pin X First posture Y Second posture Z Third posture

Claims (4)

(57) [Claims] 1. A staircase temporary railing mounting device, wherein a clamp fitted to an upper end of a stair-side side plate is attached to a lower end of a column of a staircase temporary railing, wherein the clamp comprises: a U-shaped main body; One of the opposite leg portions of the U-shaped main body is constituted by a push bolt that is screwed and penetrated in the perspective direction with respect to the other leg portion. A first position in which the vertical side plate on the stairs side is sandwiched and fixed between the push bolts, and a vertical side plate on the stairs side is fixed between the left and right other side portions of the lower end of the column and the push bolts; And a third position in which the stair-side horizontally extending side plate portion is sandwiched and fixed between the push bolt and the main body leg portion facing the push bolt. Slider mounting device. 2. A U-shaped main body of the clamp, wherein a leg facing the push bolt and a bridging portion connected thereto are constituted by a pair of side plates sandwiching the lower end of the column, and the bridging portion is connected to the leg. The two holes of the section and one corner between the leg and the bridging section are provided with locked holes, respectively, and the lower end of the support is in the first position or the second position. A retractable locking pin which can be removably fitted into and removed from two locked holes in the main body corner portion and the leg portion of the clamp, and the main body corner portion of the clamp in the third position and the two locking pins in the bridging portion. 2. The mounting device for a temporary stair railing according to claim 1, wherein a locking pin that can be fitted and disengaged is disposed in each of the locked holes. 3. The retractable locking pins are disposed at three positions in the vertical direction at equal intervals at the lower end of the support column, and the locking pins at the corners of the main body of the clamp are connected to the locking pins at the legs. The distance to the locking hole and the distance from the locked hole in the corner of the main body of the clamp to the locked hole in the bridging portion are equal to the interval between the locking pins. A temporary railing mounting device for stairs. 4. The retractable locking pin is disposed at two positions in the vertical direction at the lower end of the support column, and extends from a locked hole at a corner of the body of the clamp to a locked hole at the leg. 3. The temporary staircase according to claim 2, wherein the distance from the locking hole at the corner of the body of the clamp to the locking hole at the bridging portion is equal to the distance between the locking pins. Handrail mounting device.