JP2503049Y2 - Work scaffolding - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention is used in a construction site of a building or the like when performing work at a relatively high place such as interior finishing of the ceiling, wiring in the ceiling, and piping work as shown in FIG. It's about scaffolding.

[0002]

2. Description of the Related Art In the case of building a building, interior construction and wiring work are carried out after the skeleton is constructed. In that case, in finishing work in a relatively high place such as a ceiling,
Working scaffolds are used.

As the latest conventional device for this kind of work scaffold,
There is one proposed in JP-A-3-13662.

[0004]

According to this conventional apparatus, a stage section for performing work and a foldable leg body are provided, and when used, the leg body is opened to stand upright in the use position. At the same time, it can be folded and stored when not in use. With this structure, the scaffolding member and the scaffolding plate before that are easier to use than the separate ones, but In this proposed conventional device, it can be folded and stored compactly when not in use, but the strength of the legs during use is insufficient due to the pursuit of compactness, and therefore There was a fatal drawback of having stability.

In view of the above-mentioned problems, the present invention can be folded compactly as in the conventional case when not in use, and when used, the legs are firmly expanded to sufficiently protect against the load and vibration received on the stage section. It is an object of the present invention to propose a joint device for a reinforcing crosspiece for a work scaffold having durability.

[0006]

In order to solve the above-mentioned problems, in the invention according to claim 1, a stage part 1 for carrying out work, if indicated by the reference numerals shown in the embodiment, Between the left and right legs 2a to 2d, which are provided upright on the back side of the stage portion 1 in an expanded state and are foldable,
Leg reinforcement bars 5, which can be folded in conjunction with these legs
In a work scaffold having 6, an upper crosspiece member 23 forming the leg reinforcing crosspieces 5, 6 and a lower crosspiece pivotally attached to the upper crosspiece member 23 via a joint shaft 25 so as to be foldable in two. between the member 24, provided with a joint device 8 which also serves as a holding means 7 for automatically hold the leg 2a~2d the expanded state when the leg 2a~2d is expanded, the Leg 2
The holding means 7 for holding a to 2d in the expanded state has the holding
The configuration is provided with an opening lever 32 that releases the state .

[0007]

According to the first aspect of the invention, the legs 2a to 2d for supporting the stage portion 1 to be operated are integrally provided with the reinforcing bars 5 and 6, and the legs 2a to 2d are stored at their storage positions. When setting to the use position from these legs 2a to 2d
Since the reinforcing bars 5, 6 extend from the folded state to the straight state in conjunction with the movement of the work scaffolding, the work scaffolding can be easily set to the use state.

Further, by expanding the legs 2a to 2d from their storage positions and erecting them in the use position, these legs 2a to 2d are firmly reinforced by the reinforcing bars 5 and 6 extending in a straight line. Therefore, it has sufficient durability against the load and vibration received on the stage unit 1.

Furthermore, the left and right reinforcing bars 5 and 6 for reinforcing the legs 2a to 2d are folded in two in accordance with the folding of the legs 2a to 2d to the storage position. Since it can be folded without interfering with 2d, it can be compactly housed like the above-mentioned conventional device despite having the reinforcing bars 5 and 6.

Further, when the legs 2a to 2d are expanded from their storage positions to the use positions, the joint device 8 provided on the reinforcing bars 5 and 6 is automatically operated so that the reinforcing bars 5 and 6 are in a linear state. The legs 2a to 2d are automatically and firmly held in their use positions by extending them to maintain their straight state. At this time, as a means for holding the legs 2a to 2d in the use position, it is conceivable to provide a holding means at the base between the stage portion and the legs, but if the means is provided at the base of the legs. However, its holding strength is weak, and it is difficult to prevent shaking or impact due to vibration applied to the stage section. On the other hand, by providing the joint device 8 which also functions as the holding means 7 on the reinforcing bars 5 and 6 as in the present invention, the position holding strength of the legs 2a to 2d is naturally strengthened and the vibration received by the stage portion 1 is naturally increased. It is possible to reliably prevent the swaying of the legs 2a to 2d against a shock or a shock.

According to claim 1 , the legs 2a to 2 are formed.
Since the holding means 7 for holding d in the expanded state is provided with the opening lever 32 for releasing the holding state, the reinforcing bars 5, 6 can be easily and easily operated only by one-touch operation of the opening lever 32.
Therefore, it is possible to fold the legs 2a to 2d on the back surface side of the stage portion 1 in a stored state.

[0012]

FIG. 1 is a front view of an embodiment of the present invention,
The stage unit 1 on which an operator rides to perform work such as the ceiling is shown in FIG.
As shown in FIG. 3, the rectangular step frame 9 made of aluminum or a metal such as expansion metal is integrally provided on the rectangular peripheral frame 10 by welding, screwing, or the like.

As shown in FIGS. 1 and 2, mounting brackets 11 having a U-shaped cross-section are provided at four corners on the back side of the stage portion 1 in the front, rear, left and right directions. Are fixed by welding or the like.

Of the front, rear, left and right mounting brackets 11, leg mounting shafts 12 are mounted between the front and rear mounting brackets 11, 11 respectively.
Before and after each of the legs 2 (2a, 2c and 2b, 2
d) is attached. Each leg 2 is attached to the leg mounting shaft 12 so as to be rotatable between an upright state facing the opening 11b opening downward of the mounting bracket 11 and a stored state facing the opening 11a opening laterally. . Thus, in order to rotatably mount each leg 2 to the mounting bracket 11 from its upright state to the stored state, the base 13 of each leg 2 is rotatably connected to the leg mounting shaft 12, or each leg 2 is rotatably connected. The two base portions 13 are integrally attached to the leg mounting shaft 12, and the leg mounting shaft 12 is rotatably attached to the mounting bracket 11.

As shown in FIGS. 1 and 3, each leg 2 has a first leg member 14 whose base portion 13 is attached to the leg attachment shaft 12, and is fitted to the first leg member 14 with a smaller diameter. It comprises a second leg member 15, and the leg length adjusting device 16 allows the second leg member 15 to be expanded and contracted with respect to the first leg member 14. In the left and right second leg members 15 and 15, the leg members 15 and 15 are also appropriately connected by the horizontal rail 35.

As shown in FIG. 1, particularly in FIG. 3, the left and right legs 2 are provided.
a to 2d, front and rear legs 2a, 2c and 2b, 2
The horizontal rails 3 and 4 are attached between the lower ends of the first leg members 14 of FIG.
The reinforcements 4 and 14 are made in the front-rear direction.

As shown in FIGS. 1 to 3, on the rear surface side of the central portion of the step board 9 of the stage portion 1, at a position shifted to the front and back, as shown by the alternate long and short dash line in FIG. Mounting brackets 17 and 18 having U-shaped cross-sections in which the openings 17a and 18a face in the opposite directions to the left and right are fixedly attached, and the mounting brackets 19 and 20 are mounted to the mounting brackets 1.
Reinforcing bars 5 and 6 are provided between 9, 20 and the left and right horizontal bars 3 and 4.
Are pivotally connected. The reinforcing bars 5 and 6 are rotatably mounted between the above two members.
Even if both ends of the reinforcing bar 5 and 6 are rotatably connected between the bar mounting shafts 19 and 20 and the horizontal bars 3 and 4, both ends of the reinforcing bars 5 and 6 are rotatably provided. And the horizontal rails 3 and 4 may be integrally connected.

In the middle of the reinforcing bars 5 and 6 in the longitudinal direction, as shown in FIG.
The joint device 8 for folding the reinforcing bars 5 and 6 in two is provided as shown in FIG. 1, and the reinforcing bars 5 and 6 are folded in two around the joint device 8 as shown by the chain double-dashed line. In conjunction with this, the legs 2a to 2d can be housed on the back side of the stage unit 1.

As shown in FIGS. 5 and 6, the joint device 8 has a cylindrical upper lock body 21 and a lower lock body 22.
And is fixed to the upper side rail member 23 and the lower side rail member 24 of the reinforcing rails 5 and 6 respectively by welding or the like, and both lock bodies 21, 22 are bifurcated connecting portions 2 respectively.
1a and 22a are fitted to each other by interlocking them to connect both connecting parts 21a and 2a.
It is pivotally connected by a joint shaft 25 attached over 2a, and the lower rail member 24 of the reinforcing rails 5, 6 is centered on the joint shaft 25 as shown by the two-dot chain line in FIG. 7 with respect to the upper rail member 23. It can be folded in two in the A direction.
A lock block 27 rotatably supported on the lower lock body 22 by a lock shaft 26 is provided over the upper and lower lock bodies 21 and 22.

A lock piece 28 is provided at the tip of the lock block 27 so as to project, and the lock piece 28 engages with an engaging projection 29 provided on the lock body 21 on the upper side. A hollow portion 30 is provided in the lock block 27, and a lock spring 31 composed of a compression spring is accommodated in the lock block 27, one end of which is received by the peripheral surface 25 a of the joint shaft 25, and the other end of which is an inner wall of the hollow portion 30. It is received by 30a and is urged by this lock spring 31 so that the lock piece 28
The locking surface 28a of the engaging projection 2 of the upper lock body 21
The engaging surface 29a of 9 is strongly pressed and engaged.

A release lever 32 for releasing the locked state of the lock block 27 is provided at the rear end of the lock block 27, and the outer peripheral surface of the tip end of the lock block 27 has an upper portion as described later. When the lower side rail member 24 is extended from the half-folded state with respect to the side rail member 23, the lock block 27 causes the corner portion 29 b of the engaging projection 29 to be extended.
A guide surface 27a for sliding along (FIG. 6) is formed.

In the state shown in FIG. 6, the lock piece 28 of the lock block 27 pivotally attached to the lock shaft 26 of the lower lock body 22 is applied to the engaging projection 29 of the upper lock body 21 by the urging force of the lock spring 31. It shows a state in which the upper rail member 23 and the lower rail member 24 are linearly locked by being strongly pressed and engaged. In order to perform the opening operation from this locked state to the state in which the lower side rail member 24 is folded in two with respect to the upper side rail member 23 as shown in FIG. 8, the opening lever 32 is moved from the state of FIG. 6 to the state shown in FIG. Lock spring 31 in the direction of arrow B
It suffices to rotate downwardly against the biasing force of. By this operation, the lock piece 28 is separated from the engagement protrusion 29 and the engagement state between the two is released, and in this state, the lower rail member 2
4 is indicated by a chain double-dashed line in FIG.
By pivoting upward about 5 as shown in FIG. 8, the lower rail member 24 can be folded in two so as to overlap the upper rail member 23 as shown in FIG.

In order to extend the lower crosspiece member 24 again from this folded state to the straight line state as shown by the arrow C in FIG. 8, the lower crosspiece member 24 is moved downward about the joint shaft 25. By the rotation, the guide surface 27a of the lock block 27 comes into contact with the corner portion 29b of the engagement protrusion 29 of the upper crosspiece member 23, and the lock block 27 is pushed by the engagement protrusion 29 so that the lock block 27 is biased by the lock spring 31. It slightly sinks into the joint shaft 25 side against the. And, even more strongly, the lower crosspiece member 2
When the guide surface 27a is rotated by rotating the
As the lock block 27 is released from the pressing force of the engaging projection 29 by sliding on the corner portion 29b of 9 and passing through the corner portion 29b, the lock block 27 is biased by the lock spring 31 from the retracted state. The locking piece 28 of the lock block 27 projects and engages with the engaging projection 29, and the straight state of the crosspiece members 23 and 24 is strongly maintained.

In this manner, the joint device 8 locks both the reinforcing bars 5 and 6 in a straight line state, and while maintaining this state, the leg bodies 2 reinforced by the both reinforcing bars 5 and 6 are in an upright state,
That is, since the use state is maintained, the joint device 8 also serves as the position holding means 7.

FIG. 9 shows a joint shaft 25 connecting the upper lock body 21 and the lower lock body 22 and a lock spring 31.
The joint shaft 25 is sandwiched between the shaft holes 21b and 22b of the upper and lower lock bodies 21 and 22 and the lock block supported by the lock shaft 26 between the lock bodies 21 and 22. It is provided slidably through the hollow portion 30 of 27. Therefore, with this alone, the joint shaft 25 can be easily pulled out from these shaft holes 21b and 22b. However, as described above, the lock spring 31 is provided between the peripheral surface 25a of the joint shaft 25 and the inner wall 30a of the hollow portion 30, but both ends of the lock spring 31 are provided on the peripheral surface 25a of the joint shaft 25. The small groove 33 bored and the small protrusion 34 protruding from the inner wall 30a of the hollow portion 30 are engaged with each other, thereby preventing the lock spring 31 from coming off the hollow portion 30, and The joint shaft 25 is restricted by 31 so that the joint shaft 25 does not come off from the shaft holes 21b and 22b.

For this reason, when it is necessary to disassemble the upper crosspiece member 23 and the lower crosspiece member 24 of the reinforcing crosspieces 5 and 6 for repair or storage, as shown in FIG. Is removed from the hollow portion 30 against the urging force, the joint shaft 25 can be easily ejected from the shaft hole, whereby the crosspiece members 23 and 24 can be disassembled, which is practical. .

In FIG. 1, casters 36 with stoppers are attached to the lower ends of the second leg members 15 of the legs 2a to 2d.

Therefore, during use as shown in FIG. 11, as shown in FIG. 1, the legs 2a to 2d are rotated in an upright state about the leg mounting shaft 12 and, at the same time, the reinforcing bars 5 and 6 are jointed. Extend from the state of being folded in half at 8 to make it straight. By extending the reinforcing bars 5 and 6 in a straight line in this way, the holding means 7 also serving as the joint device 8 provided on the reinforcing bars 5 and 6 strongly maintains the reinforcing bars 5 and 6 in a straight line state. As a result, the legs 2a to 2d connected to the reinforcing bars 5 and 6 can be firmly maintained in the used state. In this way, the reinforcing bar 5, which reinforces the legs 2a to 2d,
By providing the holding means 7 on 6, it is possible to prevent the legs 2a to 2d from swaying particularly in the left-right direction, and to strongly maintain the upright state.

Finally, according to the embodiment of the present invention, the leg 2
Cross rails 3, 4 provided in a, 2c and 2b, 2d in the front-rear direction
The left and right reinforcing bars 5, 6 prevent the sway in the front, rear, left, and right directions, and have a strong durability against the load and vibration of the operator etc. on the stage 1.

When the legs 2a to 2d are stored on the back side of the stage portion 1 from the used state of the legs 2a to 2d, the release lever 32 of the holding means 7 is operated to hold the legs 2a to 2d with one touch. Release the holding action of the means 7,
By folding and folding the reinforcing bars 5 and 6 around the joint device 8, the left and right legs 2a, 2c and 2b, 2d are folded and stored on the back side of the stage 1 in conjunction with this. Will be done.

FIG. 4 shows this stored state, in which each leg 2 and the reinforcing bars 5 and 6 are compact within the height range of the mounting bracket 11 projecting on the back side of the stage 1. Since the casters 36 at the tips of the legs 2 are also stored sideways, the casters 36 will not protrude from the height position of the mounting bracket 11.

However, as shown in FIG. 4, each member of the work scaffold can be compactly stored on the back surface side of the stage portion 1, so that it does not become bulky during transportation and storage.

[0033]

According to the first aspect of the invention, reinforcing bars are integrally provided on the front, rear, left and right legs that support the stage section for performing work, and each leg is moved from its storage position to its use position. When setting, the reinforcing bar automatically extends from the folded state to the straight state in association with the movement of each leg, so that the work scaffold can be easily set to the used state.

Further, by expanding each leg from its stored position and erecting it in the use position, these legs are swayed in the left-right and front-rear directions by the reinforcing bar and the lateral bar extending in a straight line. Since it is blocked and strongly reinforced, it has sufficient durability against the load and vibration received on the stage part.

Furthermore, since the left and right reinforcing bars for reinforcing each leg are designed so that the left and right reinforcing bars can be folded in two in accordance with the storage operation of each leg, the reinforcing bars can be provided. Nevertheless, it can be stored compactly as in the conventional device.

Furthermore, by expanding each leg from its stored position to the use position, the joint device provided on the reinforcing bar automatically operates to extend the reinforcing bar into a linear state and maintain the linear state. However, this automatically holds the leg firmly in its use position. At this time, it is conceivable to provide a holding means at the base between the stage and the leg as a means for holding each leg at its use position. However, if the means is provided at the base of the leg, Since the holding strength is weak, it is difficult to prevent the shaking caused by the vibration applied to the stage part.

On the other hand, as in the present invention, by providing the reinforcing bar with the joint device which also serves as the holding means, the position holding strength of each leg is naturally strengthened, and each leg is against the vibration received by the stage part. It can reliably prevent body sway, and has sufficient durability against external loads and vibration impacts.

According to the first aspect , since the holding means for holding the leg body in the expanded state is provided with the release lever for releasing the held state, it is easy and easy to perform by one-touch operation of the release lever. In addition, the reinforcing bar, and hence each leg, can be folded on the back surface side of the stage portion in a housed state, which has the effect of facilitating work during storage and transportation.

[Brief description of drawings]

FIG. 1 shows a front view of an embodiment of the present invention in use.

FIG. 2 is a plan view of the same and shows a part of the inside by being cut away.

FIG. 3 is a side view of the same.

FIG. 4 is a vertical sectional front view showing a housed state of each member.

FIG. 5 is an exploded perspective view showing an embodiment of the present invention.

FIG. 6 is a vertical sectional front view of the same.

FIG. 7 is a vertical sectional front view showing the same operating state.

FIG. 8 is a vertical sectional front view showing the same operating state.

FIG. 9 is a vertical sectional front view of the main part.

FIG. 10 is an exploded perspective view showing the same usage state.

FIG. 11 is an explanatory view showing a usage state of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stage part 2 (2a-2d) Leg body 3 Horizontal rail 4 Horizontal rail 5 Reinforcing rail 6 Reinforcing rail 7 Holding means 8 Joint device 32 Release lever

Claims (1)

(57) [Scope of utility model registration request] 1. A foldable member that interlocks with these leg members between a stage unit for performing work and left and right leg members that are erected upright and foldable on the back side of the stage unit. On a work scaffolding equipped with various leg reinforcement bars,
The leg is in an expanded state between an upper rail member forming the leg reinforcing rail and a lower rail member pivotally attached to the upper rail member via a joint shaft so as to be foldable in two. When the above condition occurs, a joint device that also functions as a holding means for automatically holding the leg body in the expanded state is provided , and the leg body is held in the expanded state.
The holding means is provided with an opening lever for releasing the holding state.
Consisting of Te work scaffolding.