JP2001164751A - Tread for temporary scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temporary scaffold tread capable of coping with respective positions regardless of the positional relation of a support bracket. SOLUTION: At the side end portion of a building frame 14 of both the short side portions 24a of a tread main body 24, a fixing hasp claw 26 is provided at both the short side portion 24a, a movable hasp claw 28 moving by slide along the guide groove 27 formed over the back and forth direction is provided. By both the fixing and movable hasp claws 26, 28, the main body 24 of the tread is hooked and supported by the arm portion 17 of the support bracket 12. By the movable hasp claw 28, the movable hasp claw 28 is slid and moved in parallel to the arm portion 17 of the support bracket 12, even when the length of the arm portion 17 of the support bracket 12 is different, and the movable hasp claw 28 can be hasped and fixed to the arm portion 17, in response to the length of the arm portion 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepping plate for a temporary scaffold used at a construction site or the like.

[0002]

2. Description of the Related Art In general, a temporary scaffold used at a construction site or the like has a plurality of columns arranged side by side around a frame, and a support bracket is provided in a cantilever state with respect to the columns.
By supporting the tread plate in a substantially horizontal state with the arm portion of the support bracket, a working scaffold is secured, and the worker works on the scaffold.

[0003] Such a temporary scaffold is used only when performing construction work as the name implies, and is dismantled when the construction work is completed. Therefore, the space where the temporary scaffold is provided at the work site is not constant. Therefore, conventionally, a support bracket having a different length of the arm portion according to the interval between the skeleton and the support, or a support bracket having a telescopic arm portion is used. Then, a step board corresponding to the length of the arm portion is prepared and supported by the arm portion.

[0004]

However, conventionally, when a support bracket provided with an arm corresponding to the distance between the skeleton and the support and a tread plate corresponding to the length of the arm are used, the temporary scaffold is previously provided. The space to be provided is unpredictable. As a result, a support bracket having a telescopic arm may be used, but a plurality of treads corresponding to various arm lengths must be prepared at the work site for the tread. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a temporary scaffolding step board which can correspond to each position regardless of the positional relationship with a support bracket. .

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a first aspect of the present invention is directed to a temporary scaffolding stepboard which is supported and supported by an arm of a temporary scaffolding support bracket. The gist is that a plurality of hooks are provided for the arm, and at least one of the hooks is a movable hook that can be moved and adjusted along the arm.

According to a second aspect of the present invention, in the stepping plate for a temporary scaffold according to the first aspect, the movable hook portion is parallel to the support bracket along a short side of the stepping plate body facing the arm portion. The gist is to slide in any direction.

According to a third aspect of the present invention, in the stepping plate for a temporary scaffold according to the second aspect, the movable hook portion slides along a guide groove formed on a side surface of the short side portion of the stepping plate main body. The gist is to move.

(Operation) According to the first aspect of the present invention, the movable hook is moved and adjusted along the arm in accordance with the positional relationship with the support bracket.

According to the second aspect of the invention, in addition to the operation of the first aspect, the position of the movable hook is adjusted by sliding in the direction parallel to the support bracket, and the position of the arm is adjusted. It is hooked according to the length.

According to the third aspect of the present invention, in addition to the operation of the second aspect of the present invention, the movable engaging portion is allowed to slide by the guide groove. Be moved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment in which the present invention is embodied in a temporary scaffolding tread used in a construction site is shown in FIGS.
This will be described with reference to FIG. In the following description,
Unless otherwise specified, “right” or “left” indicates “right” or “left” when the skeleton 14 is viewed from the column 13 side, and “front” or “back” indicates the skeleton 14 unless otherwise specified. The side is referred to as “front” and the column 13 side as “rear”.

As shown in FIG. 1, the temporary scaffold in the present embodiment is mainly a step board 1 as a step board for a temporary scaffold.
1 and a support bracket 12 as a support bracket for a temporary scaffold for supporting the same, and the support bracket 12
And a support 13 for fixing and holding the support.

A column 13 standing around the frame 14
Is a pipe-shaped column, and 4
The two connection frames 15 are provided in four directions at an angular interval of about 90 degrees. A wedge 16 extending vertically downward from the base end of the support bracket 12 is fitted into the connection frame 15 on the skeleton 14 side, and the support bracket 12 is supported in a cantilevered state on the support 13. It has become so. An arm 17 integrally formed with a wedge 16 extends in a direction orthogonal to the support 13 in the support bracket 12.

As shown in FIGS. 1 and 2, the support bracket 12 is a retractable bracket, and the movable arm 19 at the distal end is bent upward with respect to the fixed arm 18 at the proximal end. It is movable. The movable arm unit 1
Reference numeral 9 denotes a pipe-shaped first movable arm 19a and a second movable arm 19b. 2nd movable arm part 1
Reference numeral 9b denotes a cylindrical body formed to have a slightly larger diameter than the first movable arm portion 19a, and is capable of supporting the first movable arm portion 19a coaxially while sliding in the front-rear direction. As a result, the movable arm portion 19 can be extended and contracted in the front-rear direction, and the retaining bolt 20 provided on the side of the distal end of the second movable arm portion 19b allows the second movable arm 19 to be moved at a desired position. First movable arm portion 19 with respect to portion 19b
The amount of protrusion of a is adjusted so that both arm portions 19a and 19b are fixedly held. Each of the arms 18 and 19 is connected to a connecting rod 21 extending in a vertical direction and a second rod 21.
The arm 22 is supported by a brace 22 obliquely provided from the distal end of the movable arm portion 19b and a support plate 23 provided below the connecting rod 21 and the brace 22.

On the other hand, the step board 11 comprises a step board body 24 and a plurality of hooks 26 and 28 as hooks. The tread plate main body 24 is formed in a rectangular shape by a pair of left and right short sides 24a and a pair of front and rear long sides 24b, which are frames, and the long side 24b and the short side 24 are formed.
A net 25 is stretched inside a. A fixed hook 26 is provided at each front end on both sides of the short side 24a of the step board body 24. Double fixed hook 2
6 are projected in the left-right direction, and these fixed hooks 2
6 is formed in a key shape so that it can be hooked to the pipe-shaped movable arm portion 19 from above.

As shown in FIG. 3, guide grooves 27 are provided on both side surfaces of the short side portion 24a. The two guide grooves 27 are formed in a notched groove shape from the rear end of the short side portion 24a to the vicinity of the fixed hook 26,
The rear end of the guide groove 27 is formed to open rearward.
As shown in FIG. 4, the two guide grooves 27 are formed inside the opening 27a opening toward the support bracket 12 and inside the opening 27a, and have a groove width larger than the groove width of the opening 27a. And the accommodation portion 27b. A movable latching claw 28 is attached to each of the short sides 24a so as to slide along the guide grooves 27 in a direction parallel to the support bracket 12.

The both movable hooks 28 are composed of a sliding portion 29 and a hook main body 30. The sliding portion 29 includes:
The short side portion 24a is formed in a U-shape in a right cross section so as to cover from the upper surface to the lower surface. The locking claw body 30 is formed integrally with the rear end of the sliding portion 29,
It protrudes toward 2. In addition, the hook claw body 3
0 is a pipe-shaped movable arm 1 similar to the fixed hook 26.
9 is formed in a key shape so that it can be hooked from above.

The support bracket 1 in the sliding portion 29
As shown in FIG. 3, two sliding bolts 31 are provided on the two side surfaces.
Are mounted toward the guide groove 27, and the sliding bolts 31 are screwed together with the nuts 32 in the accommodation portions 27 b of the guide groove 27. Here, the shaft diameter of the sliding bolt 31 is formed smaller than the groove width of the opening 27a of the guide groove 27, the outer diameter of the nut 32 is larger than the groove width of the opening 27a, Is formed to be smaller than the groove width. As a result, the sliding bolt 31 is
7, that is, the movable latch claw 28 is slid and moved without falling off the short side portion 24 a.

As shown in FIG. 5, a pair of sliding hooks 33 are provided on the rear side surface of the long side 24b of the tread plate main body 24. (Only one is shown in FIG. 5).
The claw 35 is formed so as to be continuous with the hook 4, and a locking piece 36 slidable with respect to the claw 35. The slide portion 34 is formed in a substantially long rectangular plate shape, and its length in the short direction is formed so as not to protrude from the long side portion 24b in both up and down directions.

An elongated hole 37 is formed substantially in the center of the side surface of the slide portion 34 in the left-right direction.
7, two first sliding pins 38 protruding near the left and right ends of the side surface of the long side 24b are engaged. Therefore, the slide portion 34 is slidable within a range in which the long hole 37 is allowed by the first slide pin 38. Claw 35
Is formed in a substantially quarter-arc shape, and is integrally formed outside the slide portion 34 along the long side portion 24b. A locking piece 36 is slidably provided on the substantially distal end side surface of the claw 35. The locking piece 36 is formed in a crescent shape, and a long hole 39 is formed in a substantially central portion of the side surface in an arc shape along the shape of the locking piece 36. Claw part 3
Two second sliding pins 40 protrude from the vicinity of the distal end of 5, and are engaged with the long holes 39 of the locking pieces 36. Therefore, the locking piece 36 is slidable within a range in which the elongated hole 39 is allowed by the second sliding pin 40.

As a result, even when the two sliding hooks 33 slide toward the support bracket 12, the tip of the hook 35 is locked to the movable arm 19 without contacting the arm 17. The locking piece 36 is engaged with the movable arm 19 by sliding of the locking piece 36. The engaging recess 3 is provided at the inner end of the long hole 39 of the locking piece 36.
9a is provided upwardly, and the locking piece 36
As shown in FIG. 7, the second sliding pin 4 on the side of the tread plate 11 is
0 is engaged.

Next, the operation of the temporary scaffold tread plate configured as described above will be described. First, the work space is large,
A case where the interval between the skeleton 14 and the support 13 is increased will be described. As shown in FIG. 2, in the support bracket 12, the first movable arm 19 a is slid toward the frame 14, the projection length of the first movable arm 19 a is increased, and the first movable arm 19 a is tightened with the retaining bolt 20. Fix it. Then, the fixed hooking claw 26 of the tread plate 11 is hooked and held at the tip of the first movable arm portion 19a. Next, the movable latching claw 28 is slid along the guide groove 27 of the short side portion 24a, thereby disposing the movable latching claw 28 at a position corresponding to the base end of the second movable arm portion 19b, and latching. The claw body 30 is hooked on the second movable arm portion 19b.

At this time, the shaft diameter of the sliding bolt 31 and the diameter of the nut 32 in the movable hook 28 are smaller than the groove width of the opening 27a and the groove width of the housing 27b in the guide groove 27. , The movable locking claw 28 is in the same groove 27
And the diameter of the nut 32 is formed to be larger than the groove width of the opening 27a, so that the movable hook 28 is short during the sliding movement of the movable hook 28. It does not come off the side 24a. In addition, the locking claw body 3 of the fixed locking claw 26 and the movable locking claw 28
Since 0 is formed in a key shape, it is easily locked from above the movable arm portion 19. At this time, as shown in FIG. 5, the sliding hook 33 is housed in a state where the tip does not protrude from the short side 24a.

Next, a case where the working space is narrow and the interval between the frame 14 and the support 13 is shortened will be described.
As shown in FIG. 6, in the support bracket 12, the first movable arm portion 19 a is slid
The projecting length of the movable arm portion 19a is shortened, and the movable arm portion 19a is fastened and fixed with a retaining bolt 20. And the movable arm part 19
(See FIG. 6, the tip of the second movable arm 19b). Next, the movable hook claw 28 is slid along the guide groove 27 of the short side portion 24a to dispose the movable hook claw 28 at a position corresponding to the base end of the second movable arm portion 19b. The pawl main body 30 is hooked on the second movable arm portion 19b.

At this time, the projecting length of the first movable arm portion 19a is short, and the movable hooking claw 28 is disposed near the fixed hooking claw 26, and the tread plate 11 is supported only on the front side. Is in an unstable state. However, even if the movable locking claw 28 is slid toward the rear end of the short side portion 24a, the hand that comes into contact with the column 13 is blocked. In such a case, a pair of auxiliary brackets 41 (only one is shown in FIG. 6) is supported by the connection frame 15 on the opposite side of the support 13, and the sliding hook 33 is used. As shown in FIG. 7, the sliding hook 33 is slid toward the auxiliary bracket 41 along the long side 24 b of the tread plate 11, and the nail 35 of the sliding hook 33 is The arm 41a is locked. Thereafter, the locking piece 36 of the sliding hook 33 is slid along the claw 35,
By engaging the second sliding pin 40 on the side of the tread plate 11 with the engaging concave portion 39a, the sliding hook 33 is moved to the arm portion 41a.
To be hooked.

At this time, since the claw portion 35 of the sliding hook 33 is formed in a substantially quarter arc shape, the sliding hook 33 is held while the tread plate 11 is supported horizontally. Even when sliding to the side of the auxiliary bracket 41, the claw portion 35 is easily locked to the arm portion 41a without contacting the arm portion 41a. Then, the stepping plate main body 24 is fixed on one side to the fixed locking claw 2 provided at the front end by the sliding locking claw 33.
6 and the movable locking claw 28 and the sliding locking claw 33 at the rear end, so that the tread plate 11 is stably supported.

Therefore, according to the above embodiment, the following effects can be obtained. (1) In the above-described embodiment, even if the projection length of the first movable arm portion 19a is adjusted, the movable latching claw 28 slides along the short side portion 24a of the tread plate 11, thereby causing the arm portion 17 to move. Movable hook claw 28 to fit the length of
Is moved and adjusted, so that it is not necessary to replace the tread plate 11 in accordance with the length of the arm portion 17 of the support bracket 12 unlike the related art.

(2) In the above embodiment, since the slide bolt 31 of the movable hook 28 slides on the guide groove 27, the movable hook 28 is securely connected to the arm 1 of the support bracket 12.
7 can be slid back and forth.

(3) In the above embodiment, the movable locking claw 28
A nut 32 is fastened to the tip of the sliding bolt 31, and the guide groove 27 is constituted by an opening 27a and a housing 27b according to the shaft diameter of the bolt 31 and the diameter of the nut 32. The movable hook 28 does not come off from the short side 24a of the tread plate 11.

(4) In the above embodiment, since there are two sliding bolts 31 engaged in the guide groove 27, there is a gap between the sliding portion 29 of the movable hook 28 and the short piece. However, the movable locking claw 28 can be stably slid.

(5) Since the slide hook 33 is provided on the side surface of the long side 24b of the tread plate 11 so as to be able to come and go by sliding movement, the movable hook 28 is fixed to the arm near the fixed hook 26. 17, the step board body 24
Since the sliding hook 33 provided on the rear side surface (long side portion 24b side surface) is hooked on the arm portion 41a of the auxiliary bracket 41, the tread plate 11 can be supported in a stable state.

The above embodiment may be modified and embodied as follows. In the above embodiment, the slide hook 33 is provided on the rear side surface of the tread plate main body 24 along the long side portion 24b, but the slide hook 33 may not be provided.

In the above embodiment, the hook claw body 30 of the movable hook claw 28 is formed in a key shape. However, as shown in FIG. 8, the hook claw body 30 has a substantially quarter-arc shape. To form
A crescent-shaped locking piece 42 may be slidably provided on the side surface of the tip of the locking claw body 30. In this case, two third sliding pins 43 are protruded in the vicinity of the distal end of the hook claw main body 30, and a substantially similar shape to the locking piece 42 is formed substantially at the center of the side surface of the locking piece 42. The long hole 42a is formed. Then, the third sliding pin 43 is engaged with the long hole 42a. As a result,
The locking piece 42 is slidable within a range where the long hole 42 a is allowed by the third sliding pin 43. In this manner, the movable locking claw 28 can be reliably locked and held on the movable arm portion 19 by sliding the locking piece 42 toward the support bracket 12, and the locking piece 42 can be moved to the movable arm portion. When the movable plate 19 is not engaged with the movable arm 19, the movable engaging claw 28 is locked to the movable arm 19 only by the approximately one-fourth arc-shaped engaging claw body 30. Can be easily slid in the front-rear direction.

In the above embodiment, the sliding portion 29 of the movable hooking claw 28 and the hooking claw main body 30 are integrally formed. However, as shown in FIG. May be provided as a separate member. According to FIG. 9, a protruding piece 29 a is formed integrally with the sliding portion 29 so as to be orthogonal to the short side portion 24 a of the tread plate main body 24 at a substantially central portion at the rear end of the sliding portion 29. A concave portion 30a is formed in a substantially central portion of the base end portion of the hook claw main body 30 by cutting. The projecting piece 29a of the sliding portion 29 is disposed in the recess 30a in a meshing state, and the turning pin 44 is inserted vertically in the recess 30a and the projecting piece 29a. As a result, the hook claw body 30 is rotatable about the rotation pin 44 as a fulcrum.

In this way, even when the length of the arm portion 17 is shortened, the hooking claw body 30 is rotated and is arranged so as to be parallel to the short side portion 24a of the tread plate 11, thereby being movable. Even if the locking claw 28 is slid, the support 13
There is no danger of contact. The movable hook 28 can be easily hooked on the arm portion 41a of the auxiliary bracket 41 without providing the slide hook 33, and the step plate 11 can be supported in a stable state.

In the above embodiment, one of the two hooking claws 26 and 28 provided on the short side 24a of the tread plate 11 is the fixed hooking claw 26, and the other is the movable hooking claw 28. As shown in FIG. 10, both may be movable latching claws 28. According to FIG. 10, the guide groove 27 in the tread plate main body 24 is formed over the entire front and rear direction of the short side portion 24a, and both ends thereof are opened. And
The both movable hooks 28 slide along the guide grooves 27. With this configuration, both the movable locking claws 28 are removed from the opening portions of the guide grooves 27 during transportation and storage, so that the movable locking claws 28 are not in the way.
The guide groove 27 may be formed so that only one end is opened.

In the above embodiment, the guide groove 27 is provided on the side surface of the short side portion 24a of the tread plate 11, but the guide groove 27 may be provided on the upper surface and the lower surface of the short side portion 24a. In such a case, the sliding bolt 31 of the movable hook 28 is attached to the guide groove 27 from the upper surface and the lower surface of the sliding portion 29 so as to correspond thereto. Also,
In this case, as shown in FIG. 11, the guide groove 27 is not formed from the opening 27a and the accommodation portion 27b as in the above embodiment, but is formed in a notch groove shape, and is formed on the back surface of the sliding portion 29. Even if the corresponding projection 45 is provided, the movable hook 28 can be slid and moved without coming off the short side 24a. Further, in the above embodiment, the movable hook 2
The guide groove 27 and the slide bolt 31 are provided to stably slide the slide portion 8 without coming off the short side portion 24a. However, as shown in FIG. A protruding portion 46 protruding downward and upward toward the net 25 may be provided at the inner end portion, and may be hooked and held on the inner surface of the short side portion 24a as the frame. In this case, the protrusion 46 slides along the inner edge of the short side 24a, so that the movable latching claw 28 can be slid and moved without coming off the short side 24a.

In the above-described embodiment, the sliding portion 29 of the movable latching claw 28 is formed in a U shape so as to cover the upper side to the lower side of the short side portion 24a. . In the above embodiment, the hook claw body 30 of the movable hook claw 28
Is formed in a key shape so as to be hooked to the movable arm portion 19 from above, but may be a donut-shaped hook portion which fits into the pipe-shaped movable arm portion 19. In this case, the hook is attached from the tip of the movable arm 19.

In the above-described embodiment, the movable locking claw 28 is slid along the guide groove 27 by the sliding bolt 31 and the nut 32. However, a pin having an H-shaped cross section may be used. Good. Even in this case, the movable hook 28 can be slid and moved without coming off the short side 24a.

In the above embodiment, the guide groove 27 is formed in a notch groove shape in the front-rear direction, but may be formed in a long groove shape. In the above embodiment, the support bracket 12 is a retractable support bracket 12, but a non-retractable support bracket 12 may be used.

In the above embodiment, the present invention is embodied as a temporary scaffold used at a construction site, but may be embodied at another construction site or a scaffold in a warehouse. Next, technical ideas other than the inventions described in the claims that can be grasped from the above-described embodiment and each example will be described below together with their effects.

(1) In the stepping plate for a temporary scaffold according to any one of claims 1 to 3, the movable hooking portion is hooked from above on an arm portion of the supporting bracket for the temporary scaffold. Treads for temporary scaffolding, which are hook claws. In this case, the movable hook can be easily hooked on the arm.

(2) In the stepping board for a temporary scaffold according to any one of claims 1 to 3 and the technical idea (1), a storage position in which a tip portion further does not protrude from an end of the stepping plate body. A stepping plate for a temporary scaffold, comprising: a movable hooking portion which projects from an end of the footboard body and can be brought into and out of a use position where it can be hooked to the arm portion. By doing so, even when the stepping plate is supported in a state biased to one of the short sides by sliding the movable locking claw,
The stepping plate can be supported in a stable state by setting the movable hook that can be retracted to the use position and hooking the arm against the arm.

(3) The stepping plate for a temporary scaffold according to any one of claims 1 to 3, and the technical concept (1) or (2), wherein the movable hook portion is a stepping plate main body. Temporary scaffolding treads that can be attached to and detached from. With this configuration, the movable hook can be removed from the tread plate body, so that the movable hook does not become an obstacle during transportation and storage.

[0046]

As described in detail above, according to the first aspect of the present invention, each position can be handled irrespective of the positional relationship with the support bracket.

According to the second aspect of the invention, in addition to the effect of the first aspect, the position of the movable hook can be easily adjusted by sliding. According to the third aspect of the present invention, in addition to the effect of the second aspect of the present invention, the movable engaging portion can slide reliably along the guide groove.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a temporary scaffold tread plate assembled with a support bracket according to an embodiment.

FIG. 2 is a plan view of the same.

FIG. 3 is a side view of the temporary scaffold tread.

FIG. 4 is a sectional view of a main part showing the movable hook claw.

FIG. 5 is a rear view of a main part showing the sliding hook.

FIG. 6 is a plan view showing the operation of the temporary scaffold tread.

FIG. 7 is a rear view showing the operation of the sliding hook.

FIG. 8 is a sectional view of a main part showing a movable hook according to another embodiment.

FIG. 9 is a perspective view of a main part showing the movable hook claw.

FIG. 10 is a plan view showing a temporary scaffolding tread.

FIG. 11 is a sectional view of a main part showing the movable hook claw.

FIG. 12 is a sectional view of a main part showing the movable hook claw.

[Explanation of symbols]

11 ... step board (temporary scaffolding step board), 12 ... support bracket (temporary scaffolding supporting bracket), 17 ... arm section,
24: step board body, 24a: short side, 27: guide groove,
28: movable hook claw (movable hook).

Claims (3)

[Claims] 1. A stepping plate for a temporary scaffold which is hung and supported by an arm portion of a support bracket for a temporary scaffold, wherein a plurality of hook portions for the arm portion are provided on a tread plate body, and at least one of the hook portions is hooked. A temporary scaffolding tread plate having a movable hooking portion that can be moved and adjusted along the arm portion. 2. The stepping plate for a temporary scaffold according to claim 1, wherein the movable latching portion slides in a direction parallel to a support bracket along a short side portion of the stepping plate main body facing the arm portion. . 3. The stepping plate for a temporary scaffold according to claim 2, wherein the movable hook portion slides along a guide groove formed on a side surface of the short side portion of the stepping plate main body.