JP2503050Y2 - Work scaffolding - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention is a work to be used at a construction site of a building, etc., which can be performed at a relatively high place such as interior finishing of the ceiling, wiring in the ceiling, and piping work as shown in FIG. The present invention relates to a scaffold, and more particularly to a leg length adjusting device for a leg that supports a stage section for work.

[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.

In this type of work scaffold, a latest conventional device relating to the leg length adjusting device for adjusting the height of the work stage portion is proposed in Japanese Patent Laid-Open No. 13662/1993.

[0004]

According to this conventional device, the leg length adjusting device for the legs that supports the stage section for work has a structure in which the legs themselves are notched or through holes are provided. However, there is a problem that the strength of the leg itself is weakened and the operation of each member for preventing rattling is very troublesome.

In view of the above-mentioned problems, the present invention provides a working scaffold which facilitates the operation of each member for preventing rattling without providing any cutouts or through holes in the leg itself. The purpose is to propose.

[0006]

In order to solve the above-mentioned problems, in the invention according to claim 1, the back surface of the stage portion 1 on which work is carried out is indicated by the reference numerals shown in the embodiments. In a work scaffolding in which each leg 2 standing on the side is provided with a leg length adjusting device 16 for adjusting the length of each leg 2, each leg 2 is provided with a first leg member 14 on the upper side. , The first leg member 14
The second leg member 15 on the lower side fitted to the
The leg member 15 is provided with an engaging step portion 21 and a flat portion 2 in the longitudinal direction thereof.
The engaging portion 23 in which 2 and 2 are alternately provided is provided, and the first leg member 14
The first leg member 14 is formed by pressing the engaging pin 26 that engages with the engaging stepped portion 21 of the engaging portion 23 and the flat portion 22 of the engaging portion 23 so as to face the engaging portion 23. When looseness with a leg length adjustment device 16 provided with the rattling prevention pin 27 for preventing between the second leg member 15, the engagement step 2 of the engaging portion 23
1 has a step surface 21a whose upper surface side is horizontal and
A configuration is adopted in which the surface side is formed as a tapered surface 21b .

Further, in the invention according to claim 2, the engagement pin 26 has an engagement spring 29 for urging the engagement pin 23 toward the engagement portion 23 side, and the rattling prevention pin 27 is , A separating spring 3 for urging the pin in a direction separating from the engaging portion 23 side
8 is adopted.

In the invention according to claim 3 , the engaging pin 26 is released from the engaging portion 23 against the urging force of the engaging spring 29 and is maintained in the open position. The structure according to claim 1 or 2 which comprises the maintenance part 33 is adopted.

[0009] In the fourth aspect, the anti-rattle pin 27, the bolt portion 34 for maintaining the position away the pin from the engaging portion 23, only the proximal end thereof, or The structure according to claim 1 or 2 is provided only on the base side and the tip end thereof.

[0011]

According to the first aspect of the invention, the length of each leg 2 erected on the back surface side of the stage portion 1 on which the work is performed is determined by the first leg member 14 and the second leg of each leg 2. To adjust by the leg length adjusting device 16 provided between the first leg member 1 and the member 15,
The engagement pin 26 and the rattling prevention pin 27 provided in FIG.
The engaging pin 26 is engaged with the engaging step portion 21 by performing a pressing rotation operation in parallel toward the engaging step portion 21 and the flat portion 22 of the engaging portion 23 provided on the second leg member 15. The degree of expansion and contraction of the second leg member 15 relative to the first leg member 14 is determined, and the rattling prevention pin 27 presses the flat portion 22 to reliably prevent rattling between the two leg members 14 and 15. As a result, the leg length of each leg 2 is easily adjusted.

Further, according to the first aspect of the invention, when the second leg member 15 is extended downward with respect to the first leg member 14, the engaging pin 26 needs to be maintained in the open position. , The engaging pin 26 contacts the tapered surface 21b of the engaging stepped portion 21 by simply extending and moving the second leg member 15 downward as shown in FIG. 8, and along the tapered surface 21b. The engaging pin 26 moves backwards against the urging force of the engaging spring 29 and moves over the tapered surface 21b, so that the engaging pin 26 is automatically urged by the engaging spring 29 to engage the engaging step portion 21. Can be engaged with the step surface 21a.

According to the second aspect of the invention, the engagement pin 26 that engages with the engagement step portion 21 of the engagement portion 23 is constantly pressed toward the engagement step portion 21 side by the engagement spring 29. Therefore, the engagement pin 26 does not accidentally disengage from the engagement step portion 21. The rattling prevention pin 27 that presses the flat portion 22 of the engaging portion 23 is moved by the urging force of the separation spring 38.
It is possible to quickly perform the pressing operation and the detaching operation of the prevention pin 27, and the rattling prevention pin 27 is attached to the bolt portion 34.
When screwed into the female screw portion 36 of the mounting bracket 25 by the above to maintain the pressed state, both screwed portions are
Since the separation spring 38 is constantly biased, the pressing state can be safely maintained without being loosened by the vibration or impact applied to each leg 2.

According to the third aspect of the invention, the engagement pin 26 is released from the engagement portion 23 against the urging force of the engagement spring 29 and is maintained in the open position. Can keep the engagement pin 26 open simply by retracting the engagement pin 26 against the urging force of the engagement spring 29 and rotating the engagement pin slightly.

According to the fourth aspect of the present invention, the rattling prevention pin 27 has the bolt portion 34 for maintaining the pin at the position separated from the engaging portion 23 only at the base end portion thereof. , Or the rattling prevention pin 27 that presses the flat portion 22 of the engaging portion 23 is provided only on the base side and the tip end thereof, the rattling prevention pin 27 is pressed by the biasing force of the separation spring 38. It is possible to quickly perform the release operation.

[0016]

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 surface side of the stage portion 1 in the front-rear direction, and the U-shaped opening portions 11a and 11b are downward in the left-right facing direction. Are fixed by welding or the like.

Of the front, rear, left and right mounting brackets 11, a leg mounting shaft 12 is 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. The second leg member 15 and the leg length adjusting device 1 as described later.
The second leg member 15 can be expanded and contracted with respect to the first leg member 14 by means of 6. In the left and right second leg members 15, 15, each leg member 1
The crosspieces 39 are also appropriately connected between 5 and 15.

As shown in FIG. 1, particularly in FIG. 3, left and right legs 2
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 tread plate 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.

5 and 6 show the details of the leg length adjusting device 16 according to the present invention described above. The second leg member 15 fitted to the first leg member 14 of each leg 2 includes: A part of the peripheral wall is recessed in a U-shaped cross section in the longitudinal direction, and the recess 15
An engaging portion 23 in which an engaging step portion 21 and a flat portion 22 are alternately arranged at appropriate intervals in the longitudinal direction of a is integrally provided with a screw 24 or the like as a member different from the second leg member 15.
The engagement step portion 21 has a horizontal step surface 21a formed on the upper surface thereof, while a taper surface 21b is formed on the lower surface side thereof. Further, the mounting bracket 25 is projectingly fixed so as to surround the outer peripheral surface of the first leg member 14, and the engaging pin 26 on the lower side and the rattling prevention pin 27 on the upper side are attached to the mounting bracket 25. It is provided corresponding to the engaging portion 23 having the engaging step portion 21 penetrating the side wall of the one-leg member 14, of which the engaging pin 26 includes the mounting bracket 25 and the spring receiver 28 as shown in FIG. It is urged toward the engagement step portion 21 side by an engagement spring 29 which is interposed between and as shown by an arrow a. Further, the engagement pin 26 is provided with a release maintaining portion 33 that separates the engagement pin 26 from the engagement portion 23 side to release the engagement pin 26 from the engagement state and maintain the release state. That is, the open position maintaining small piece 30 is provided so as to be orthogonal to the engagement pin 26, and the small piece engaging portion 32 is provided so as to be provided on the mounting bracket 25.

Further, the rattling prevention pin 27 is provided with bolt portions 34 and 35 on the base end side and the tip end side thereof, and the female screw portion 36 in which the base end side bolt portion 34 is provided on the mounting bracket 25. Screw it in to engage the pin tips with the engagement steps 21 and 21.
It is designed to be pressed against the flat portion 22 between
By removing the proximal end side bolt portion 34 from the female screw portion 36, it is urged by a separation spring 38 provided between the outer peripheral surface of the mounting bracket 25 and the knob 37 of the rattling prevention pin 27, thereby The rattling prevention pin 27 can be kept open.

Therefore, as shown in FIG. 6, the first leg member 1
When adjusting the leg length of each leg 2 by operating the leg length adjusting device 16 from a state in which each leg 2 including the fourth leg member 15 and the second leg member 15 is maintained at a predetermined length by the engaging portion 23. 6 to 7, in the release maintaining portion 33, the engaging pin 26 is held backward by the holding pin 31 against the urging force of the engaging spring 29 as shown by the arrow b. And by rotating 90 ° as indicated by arrow c, the small piece 30 is engaged with the small piece engaging portion 32 protruding from the mounting bracket 25, and the engagement pin 26 is maintained in the open position. Further, the rattling prevention pin 27 is also separated from the engaging portion 23 by the urging force of the separation spring 38 by separating the bolt portion 34 on the proximal end side thereof from the female screw portion 36.

By this operation, the second leg member 15 can freely expand and contract with respect to the first leg member 14. Therefore, the second leg member 15 is moved to a desired expansion and contraction position with respect to the first leg member 14, and At the required position, the engagement pin 26 is further rotated 90 ° as shown by the arrow c, and the open position maintaining small piece 30 protruding therefrom is released from the small piece engaging portion 32. As a result, the engagement pin 26 is biased by the engagement spring 29 and engages with the engagement step portion 21, and the load received by the first leg member 14 is engaged with the engagement step portion 21 with which the engagement pin 26 engages. It is possible to prevent the contraction movement of the second leg member 15 by receiving it.

In this case, when the second leg member 15 is extended and moved downward with respect to the first leg member 14, it is not necessary to keep the engagement pin 26 in the open position, and it is shown in FIG. As described above, the rattling prevention pin 27 is separated from the engagement portion 23, but the engagement pin 26 is pressed against the engagement portion 23, and the second leg member 15 is simply moved downward as shown by an arrow. When the engaging pin 26 contacts the tapered surface 21b of the engaging stepped portion 21, the engaging pin 26 resists the urging force of the engaging spring 29 along the tapered surface 21b. By moving backward and moving over the tapered surface 21b, the engagement pin 26 can be automatically biased by the engagement spring 29 to be engaged with the step surface 21a of the engagement step portion 21.

In order to prevent rattling between the first leg member 14 and the second leg member 15, a rattling prevention pin 2 is provided.
7 against the urging force of the separation spring 38, the base end side bolt portion 34 thereof is screwed into the female screw portion 36, and the tip portion of the prevention pin 27 is strongly pressed against the flat portion 22 between the engagement step portions 21 and 21. The rattling prevention pin 27 prevents the rattling between the leg members 14 and 15 due to the tensioning action of the rattling prevention pin 27.

By the above operation, the leg length of each leg 2 can be adjusted in a stretchable manner.

The bolt portion 3 of the rattling prevention pin 27
4, 35 are provided only on the base end and the tip of the prevention pin 27, and are not provided continuously in the middle of the prevention pin 27 in order to quickly operate the rattling prevention pin 27. That is, if bolts are provided in the entire length of the prevention pin 27 in the longitudinal direction, when the prevention pin 27 is screwed into the female screw portion 36 and the tip portion is moved to the engagement portion 23, the tip portion is engaged. It is necessary to hold the knob 37 and rotate it along the bolt portion until it hits the flat portion 22 of 23, and when the rattling prevention pin 27 is separated from the flat portion 22, the prevention pin 27 is not enough. The knob 37 has to be rotated until it is separated from the above position, which takes a considerable amount of time.

On the other hand, when the bolt portion 34 is provided only on the base end side of the rattling prevention pin 27 as in the embodiment of the present invention, the base end side bolt portion 34 of the prevention pin 27 is provided. Is pushed into the engaging portion 23 side against the urging force of the separating spring 38 until it hits the female screw portion 36, and then the prevention pin 2 is pushed several times.
The tip end of the pin can be pressed against the flat portion 22 of the engaging portion 23 only by rotating 7 and the bolt portion 3
The bolt portion 34 is disengaged from the female screw portion 36 only by slightly rotating the female screw portion 4 in the reverse direction with respect to the female screw portion 36.
After that, it is biased by the separation spring 38 and the prevention pin 3 is pressed at once.
7 can be separated from the engaging portion 23, and the operation time of the rattling prevention pin 27 can be greatly shortened.
The bolt portion 34 may be provided only on the base end side of the rattling prevention pin 27 and not particularly on the tip end portion, and simply forms a large diameter portion for preventing the rattling prevention pin 27 from coming off. However, by providing the bolt portion 35 also at the tip portion as shown in the drawing, the rattling prevention pin 27 can be maintained at a large disengaged position by the bolt portion 35.

Further, the separation spring 38 not only improves the operability of the rattling prevention pin 27, but the rattling prevention pin 27 has its bolt portion 34 attached to the mounting bracket 25.
While being screwed into the female screw portion 36 of No. 3, the urging force of the separating spring 38 is constantly applied to the screwed portion so that the bolt portion 34 does not loosen even when each leg 2 is subjected to vibration or impact. By doing so, the rattling prevention pin 27 is prevented from being accidentally detached.

In FIG. 1, casters 40 with stoppers are attached to the lower ends of the second leg members 15 of the legs 2a to 2d.

FIG. 4 shows a state in which the legs 2 of the embodiment of the present invention are stored on the back side of the stage portion 1.
The reinforcing bars 5 and 6 are compactly housed within the height range of the mounting bracket 11 projecting on the back side of the stage unit 1, and the casters 4 at the tip of each leg 2 are provided.
Since 0 is also stored in the lateral direction, it does 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 side of the stage portion 1, so that it does not become bulky during transportation or storage. As described above, according to the leg length adjusting device 16 of the present invention,
Engaging pin 2 provided in parallel so as to be orthogonal to the first leg member 14
The leg length of each leg 2 can be easily and easily adjusted in accordance with the working conditions of the operator shown in FIG. 9 simply by pushing and pulling the rattling prevention pin 27 and the rotating operation at substantially the same time. .

[0036]

According to the first aspect of the present invention, the length of each leg standing upright on the back side of the stage portion for performing work is determined by the first leg member and the second leg member of each leg. For adjustment by a leg length adjusting device provided between the legs, it is sufficient to press or pull out the engaging pin and the rattling prevention pin provided on the first leg member substantially in parallel at the same time. Can be adjusted easily and quickly.

[0037] According to invention according to claim 1, in which elongated moving downward the second leg member relative to the first leg member, it is not necessary to to maintain the engagement pin in the open position,
Since only the rattling prevention pin needs to be operated, the leg length of each leg can be easily adjusted.

Further, according to the second aspect of the present invention, since the engagement pin that engages with the engagement step portion of the engagement portion is constantly pressed toward the engagement step portion side by the engagement spring, it unexpectedly occurs. The engaging pin does not come off from the engaging step portion and can be used safely.

When the rattling prevention pin is screwed into the female threaded portion of the bolt and the pressed state is maintained, the both threaded portions are constantly urged by the separating springs, and thus are received by each leg. The pressing state is maintained safely without being loosened by vibration or shock, and the occurrence of rattling due to the vibration or shock applied to each leg 2 is prevented as much as possible.

According to the third aspect of the present invention, the engagement pin is simply released when the pin is released from the engagement portion against the urging force of the engagement spring and maintained in the open position. The engaging pin can be kept open only by retracting the engaging pin against the urging force of the engaging spring and rotating the engaging pin a little.
The contraction operation of the second leg member with respect to the leg member can also be easily performed.

According to a fourth aspect of the present invention, the rattling prevention pin has a bolt portion for maintaining the pin at a position separated from the engaging portion only at the base end portion thereof, or at the base portion. Since it is provided only on the side and the tip portion thereof, it is possible to quickly perform the pressing operation and the releasing operation of the rattling prevention pin that presses the flat portion of the engaging portion.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment showing a usage state of the present invention.

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 a 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 an operating state of the main part.

FIG. 8 is a vertical sectional front view showing an operating state of the main part.

FIG. 9 is an explanatory diagram showing the usage state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stage part 2 Leg body 21 Engagement step part 22 Flat part 23 Engagement part 25 Mounting bracket 26 Engagement pin 27 Rattling prevention pin 29 Engagement spring 33 Opening maintenance part 38 Separation spring

Continuation of the front page (56) Reference JP-A-60-105759 (JP, A) Actually opened 58-57436 (JP, U) Actual public 41-16704 (JP, Y1) Actual public 31-17660 (JP , Y1)

Claims (4)

(57) [Scope of utility model registration request] 1. In a work scaffolding comprising a leg length adjustment device for adjusting the length of the leg on a leg standing on the back side of a stage part for performing work, the leg is on the upper side. Engagement consisting of one leg member and a lower second leg member fitted to the first leg member, wherein the second leg member is provided with engaging step portions and flat portions alternately in the longitudinal direction thereof. The first leg member by pressing the flat portion of the engaging pin and the engaging pin that engages with the engaging step of the engaging portion on the first leg member. A leg length adjusting device provided with a rattling prevention pin for preventing rattling between the second leg member and the second leg member ;
Its upper surface forms a horizontal step, and its lower surface tapers
-Work scaffold characterized by being formed on the surface . 2. The engagement pin has an engagement spring for urging the pin toward the engagement portion side, and the rattling prevention pin is provided in a direction of separating the pin from the engagement portion side. The work scaffold according to claim 1, further comprising a biasing separation spring. 3. The engagement pin has an opening maintaining portion that releases the pin from the engaging portion against the biasing force of the engaging spring to maintain the opening position. Working scaffolding. 4. The rattling prevention pin has a bolt portion for maintaining the pin at a position separated from the engaging portion only at its base end portion or only at its base end portion and its tip end portion. The work scaffold according to claim 1 or 2, which is provided in the work scaffold.