JP3368020B2 - Work scaffold - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work scaffold used for electrical work, cooling / heating work, painting work and the like on a ceiling of a building. 2. Description of the Related Art Conventionally, electric works for ceilings of the above-mentioned buildings have been carried out.
Generally, a stepladder is used in a cooling / heating work, a painting work, and the like, and a work scaffold is proposed in which a free wheel is provided at a lower end of a leg portion to make the work movable (Japanese Utility Model Laid-Open No. 1-94536).
No.). [0003] The stepladder does not have a sense of stability when working while riding, and there is a danger of falling down, and the work range is limited. Therefore, the stepladder frequently moves in accordance with the adjacent work place. This requires a lot of trouble to handle, and therefore the work efficiency is poor. Therefore, the above-mentioned movable scaffold has been proposed. The present invention has also been developed to solve the problems of the conventional stepladder, and can perform a wide range of operations safely and quickly, and can be folded compactly when not in use, such as carrying or storing. Another object of the present invention is to provide a working scaffold that is easy to handle. [0005] In order to achieve the above object, the present invention provides a scaffold plate having an outer frame made of a square pipe having an open end, and a center end of a bifurcated scaffold plate is connected by a pin. An outer end thereof is configured to be foldable only downward, and a slide rod is inserted from a lower end into a guide pipe hanging down from the connecting portion, and oblique support rods are provided at both ends between the lower end of the slide rod and the scaffold plates on both sides thereof. The slide rod is configured to be freely fixed to the guide pipe when the scaffold plate is used horizontally and when the scaffold plate is folded, and at a lower end below the outer corner of each scaffold plate. Telescopic legs having running wheels are provided so as to be freely foldable, and a stopper rod is provided between the telescopic legs on both sides and the lower end of the guide pipe with both ends fastened with pins. A crossbar is provided, An insertion portion provided at the lower end of the handrail is inserted into an opening at an end of an outer frame of the scaffold plate and fixed with a pin.
Stretched across both scaffolds below the center of the scaffolds
The spring that extends when the scaffold plate is used horizontally
The fixed stay provided on the scaffold and the other stay provided on the other scaffold
It works only when both scaffolds are used horizontally and free when folded.
- movable stearyl state is stored in the - is obtained by the stretched by ing a configuration in between. According to the present invention, when not used for storage, transportation, etc., as shown in FIGS. 3 and 5, the work tables 1a and 1b are divided into two.
The outer ends of each are folded down to be compact. At this time, the slide rod 9 is pulled out from the guide pipe 6 and the locking pin 7 is moved to the locking hole 14 above the slide rod 9.
Therefore, the spread of nature is suppressed and the folded state is maintained, and the vehicle can be safely moved, stored, and transported as it is. When not in use, the split
As shown in FIG. 9, the ring 34 is provided on one scaffold plate 1b side.
The fixed stay 35 provided and the other scaffold plate 1a are provided.
Contracted between the movable stays 36
Have been . Next, when the user arrives at the work site, the locking pin 7 is pulled out from the locking hole 14 above the slide rod 9 and the scaffold plate 1
When a and 1b are expanded, as shown in FIGS. 10 and 11,
The spring 34 is gradually extended, and the spring 34
The scaffolding boards 1a and 1b are slowly spread by working, and finally
When the scaffold plates 1a and 1b are horizontal,
Is inserted into the locking hole 13 below the slide rod 9 by the action of the spring 28, whereby the scaffold plates 1a and 1b are prevented from being folded downward, and the worker can work on it. The scaffolds 1a, 1a of the present invention
b is in the horizontal use state, with the scaffold plates 1a and 1b and the telescopic legs 1
6a, 16c (16b, 16d), guide pipe 6, slide rod 9, oblique support rods 10a, 10b and stopper
The rods 24 and 25 are integrally held firmly. Therefore, even if the apparatus is moved in the horizontal use state, there is no deformation or the like, and a wide range of work can be quickly performed in a stable state. As described above, in the present invention, when used,
By the action of the spring 34, the spread of the scaffold plates 1a and 1b is braked, rapid spread is suppressed, safety can be ensured, and damage to the device is prevented, and subsequent handling such as folding work is performed. Becomes extremely easy. The expansion and contraction of the telescopic legs 16a, 16b, 16c and 16d is performed by using a locking pin 2 provided on the square pipe 18.
2 is pulled out from the adjusting hole 20 of the supporting portion 19, and the length (height) is adjusted by sliding each supporting portion 19, and the locking pin 22 is adjusted to the adjusting hole 20 of the supporting portion 19 at the adjusting position. It is only necessary to do it. Further, since the outer frames 37 of the scaffold plates 1a and 1b are formed of square pipes and the ends thereof are opened,
It is easy to provide the handrail 39 by using the opening 38, and it is economical because there is no need to provide a special member, and the safety of the worker can be ensured. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a use state of the present invention, FIG. 2 is a perspective view showing a partially omitted and disassembled state, FIG. 3 is a partially omitted perspective view showing a folded state, and FIG. 5 is an enlarged front view showing a folded state of the central connecting portion, FIG. 6 is an enlarged front view showing a horizontal use state of the central connecting portion, FIG. 7 is an exploded perspective view of a guide pipe and a sliding rod portion, FIG. 8 is a cross-sectional view showing an embodiment of the locking pin portion, FIGS. 9 to 11 are cross-sectional views showing an operation state of a spring provided below the central connecting portion, and FIG. 9 is a folded scaffold plate. FIG. 10 is a cross-sectional view of the scaffold plate in the horizontal use state, FIG. 11 is a cross-sectional view of the scaffold plate in the horizontal use state, and FIG. 12 is a perspective view of the handrail standing portion. According to the present invention, the center ends of the split scaffold plates 1a and 1b having an outer frame 37 formed of a square pipe having an open end are connected by pins 3, and the outer ends thereof are connected only in a downwardly foldable manner. Is done. That is, the inner ends of the scaffold plates 1a and 1b are abutted, and the brackets 2a and 2b extending below both ends of the abutting surfaces are overlapped with each other.
It is connected by. Therefore, the center connecting portion is not pushed down by the function of the abutting surface against the load applied from the upper surface, and the outer ends of the scaffold plates 1a and 1b can be freely folded downward. it can. In the embodiment shown in the drawings, the scaffold plate 1a,
1b has a double structure. That is, the lightweight panel 5 is fixed on the upper surface of the strong rectangular frame 4 by lap welding or the like. However, a single-panel structure may be used, and if the lightweight panel 5 is attached to the rectangular frame 4 with bolts or the like, the lightweight panel 5 can be conveniently replaced if it is damaged. Further, a guide pipe 6 is suspended from the connecting portion. The upper end of the guide pipe 6 is
As shown in FIGS. 7 and 8, a through hole 8 into which the locking pin 7 is inserted is provided at an appropriate lower position as shown in FIGS. Next, a slide rod 9 is inserted from the lower end of the guide pipe 6, and pins 11a, 1b are provided at both ends between the lower end of the slide rod 9 and the scaffolds 1a, 1b on both sides thereof.
The oblique support rods 10a and 10b are provided by being fixed at 1b. In the case of the embodiment shown in the drawings, the upper ends of the oblique support rods 10a and 10b are attached to the rectangular frame 4 forming the scaffold plates 1a and 1b by pins 11a, and the lower ends are attached to the brackets 12 fixed to the lower ends of the slide rods 9 by pins. 11b. Further, the slide rod 9 is connected to the scaffold plate 1.
A and 1b are configured to be freely fixed to the guide pipe 6 when used horizontally and when folded. That is, as shown in FIG. 7, the slide rod 9 is provided with a locking hole 13 at a lower position corresponding to the through hole 8 of the guide pipe 6 when the scaffold plates 1a and 1b are used horizontally, and further, the scaffold plate 1a, 1b
A locking hole 14 is provided at an upper position which coincides with the through hole 8 of the guide pipe 6 at the time of folding. Therefore, if the locking pins 7 are inserted into the locking holes 13 below the slide rods 9 from the through holes 8 of the guide pipes 6 when the scaffold plates 1a and 1b are used horizontally, the guide pipes 6 and the slide rods 9 can be used. The oblique support rods 10a and 10b do not cause the outer ends of the scaffold plates 1a and 1b to be folded downward, thereby ensuring the safety of the worker. That is, for example, even if an operator gets on the outer ends of the scaffold plates 1a and 1b, the center connecting portion is lifted and the outer ends are folded down because the two scaffold plates 1a and 1b are integrated. Worker safety is ensured. Further, the locking pin 7 is pulled out, and the scaffold plate 1 is removed.
After folding the outer ends of a and 1b downward, the locking pin 7 is inserted into the locking hole 14 above the slide rod 9 from the through hole 8 of the guide pipe 6 so that it can be folded at the time of transportation or storage. The folded work tables 1a and 1b are opened suddenly and do not injure a nearby person and are safe. Below the outer corners of the scaffolds 1a and 1b, telescopic legs 16a, 16b, 16c and 16d each having a free running wheel 15 at its lower end are provided so as to be freely foldable. That is, the telescopic legs 16a, 16
b, 16c and 16d are formed by a square pipe 18 whose upper end is fixed to the rectangular frame member 4 constituting the scaffold plates 1a and 1b by a pin 17, and a support portion 19 inserted from the lower end of the square pipe 18. It is configured. Then, the locking pin 7 is attached to the square pipe 18.
Is provided with an appropriate number of adjustment holes 20 in the support portion 19, and the support portion 19 is slid as appropriate to insert the lock pin 22 into the adjustment hole 20 so as to have an arbitrary length ( Height). Further, the lower ends of the support portions 19 are each bent outward, and the free running wheels 15 are provided in the bent portions. Next, stopper rods 24 and 25 are provided between the telescopic legs 16a and 16c on both sides and the lower end of the guide pipe 6 (and also between the lower ends of the guide pipes 6 on the opposite side to the telescopic legs 16b and 16d). Can be That is, as shown in FIG. 5, FIG. 6 and FIG.
5 have telescopic legs 16a, 16c (the telescopic legs 1
6b, 16d) are fixed to the lower end of the guide pipe 6 by pins 26, and the inner ends thereof are fixed to the lower end of the guide pipe 6 by pins 27, respectively. Further, an appropriate number of horizontal rails 21 are provided between the telescopic legs 16a and 16b at both ends and between 16c and 16d. The horizontal rail 21 has telescopic legs 16a, 16b and 16 at both ends.
The strength is improved by integrating between c and 16d. FIG. 8 shows an embodiment of the locking pin 7 provided on the guide pipe 6. In this embodiment, the locking pins 22 provided on the telescopic legs 16a, 16b, 16c and 16d may have the same configuration. In this embodiment, the locking pin 7 inserted into the through hole 8 from the outside of the guide pipe 6 is pressed by the slide rod 9 inside by the force of the spring 28, and the lower or upper part provided on the slide rod 9 is provided. Locking holes 13 or 14
(See FIG. 7), and the inserted locking pin 7 can be manually released against the spring 28. That is, a cylindrical holder 30 having a stopper 29 at an appropriate position inside the through hole 8 provided in the guide pipe 6 is provided, and the cap 3 of the cylindrical holder 30 is provided.
1, the locking pin 7 is inserted therethrough, a locking plate 33 is attached at a suitable position inside the locking pin 7, a notch 32 is provided in the locking plate 33, and the locking plate 33 and the cap 31 are provided. The spring 28 is interposed therebetween. Therefore, the tip of the locking pin 7 is always moved by the force of the spring 28 to the sliding rod 9.
Is pressed. Next, the notch 32 of the locking plate 33 is adapted to the stopper 29, the locking pin 7 is pulled outward (rearward), and is rotated by an appropriate angle and released.
Is locked and stopped by the stopper 29, and the locking pin 7
Is kept out of the locking hole 13 or 14 below or above the slide rod 9. Therefore, the slide rod 9 is free with respect to the guide pipe 6, and the scaffold plates 1a and 1b can be expanded and folded around the pin 3 as a fulcrum. This means that the telescopic legs 16a, 16b, 16c
Similarly, the locking pin 22 of the 16d portion is the same,
After adjusting the entire length (height) by sliding the support portions 19 of 6a, 16b, 16c and 16d, the locking plate 33
When the notch 32 is adapted to the stopper 29, the locking pin 22 is fitted to the adjusting hole 20 of the support portion 19 by the action of the spring 28, and the telescopic legs 16a, 16b, 16c and 1
The square pipe 18 and the supporting portion 19 constituting 6d are integrated. According to the present invention, an insertion portion 40 provided at the lower end of a handrail 39 is inserted into an opening 38 at an end of a square pipe constituting the outer frame 37 and fixed by pins 41 for use .
Figure 2 is al, as shown in FIGS. 4 and 9 to 11, wherein the scaffold plate 1a, under the central connecting portion 1b, the two scaffolding board 1
a, stretched has been both scaffolding plate 1a straddling 1b, a spring 34 that extends at a horizontal use 1b is provided et the. [0033] while securing the spring 34 is safe to alleviate the impact when the spread legs field plate 1a of the folded prior to working, and 1b in the horizontal use, also facilitates handling during subsequent folding. [0034] That is, the when <br/> not spring 34 is provided when removing the locking pin 7 that locks the folded state at the same time both scaffolding plates 1a, 1b are dangerous spread rapidly on both sides, further Since the apparatus may be destroyed, the two scaffolds 1a, 1b must be horizontally expanded while at least two workers hold the outer ends of the scaffolds 1a, 1b. However, the provision of the spring 34 causes the two scaffold plates 1a and 1b to spread out.
Since the key is hung, it can be spread slowly by one worker alone, safety can be secured, and destruction of the device can be prevented. The details are shown in FIGS. That is, one of the scaffold plate 1b side which fixed stearyl -35, the movable stearyl -36 on the other scaffold board 1a, the
The spring 34 is provided between the fixed stay 35 and the movable stay 36. That is , in the present invention, the movable stay
36 is provided so as to function only when both scaffold plates 1a and 1b are used horizontally, and is provided so as to be stored in a free state when folded . In the embodiment shown in FIGS.
As shown in FIG. 11, the mounting end of the movable stay 36
Only when both scaffolds 1a and 1b are used horizontally, scaffolds 1
a to intersect at right angles with the scaffold plate 1a.
It constitutes a retaining part to be maintained . Therefore, the spring 34 can be easily stored, has a good appearance, and can be made thinner and more compact when folded. Further, in the present invention, the outer frames constituting the scaffolds 1a and 1b, that is, the outer frame 37 of the lightweight panel 5 is a square pipe as shown in FIGS. Therefore, it is easy to raise the handrail 39 for safety. That is, as shown in the figure, an insertion portion 40 which fits into the opening 38 of the outer frame 37 is provided at the lower end of the handrail 39, and after the insertion portion 40 is inserted into the opening 38 of the outer frame 37, as shown in FIG. As shown in the figure, the insertion portion 4 of the outer frame 37 and the handrail 39
It is only necessary to penetrate the pin 41 through the pin 0 and fix the upper end of the pin 41 with the connecting rod 42 as necessary. It is not necessary to separately provide a special member for providing the handrail 39, and it is economical. It can be provided at low cost and is economical. In the figure, reference numeral 43 denotes a safety lock at the time of folding;
Numeral denotes a hook used for cargo handling such as lifting by a crane. According to the present invention, a wide range of work can be performed safely and promptly, and can be folded compactly when not in use for transportation, storage, etc., and the handling is easy. can get.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a use state of the present invention. FIG. 2 is a perspective view showing a state in which a part is omitted and disassembled. FIG. 3 is a perspective view showing a folded state with a part omitted. FIG. 4 is a front view of a center connecting portion. FIG. 5 is an enlarged front view showing a folded state of a center connecting portion. FIG. 6 is an enlarged front view showing a horizontal use state of a center connecting portion. FIG. 7 is an exploded perspective view of a guide pipe and a slide rod. FIG. 8 is a sectional view showing an embodiment of a locking pin portion. FIG. 9 is a cross-sectional view showing an operation state of a spring in a state where the scaffold is folded. FIG. 10 is a cross-sectional view showing an operation state of a spring in a process of putting the scaffold plate into a horizontal use state. FIG. 11 is a cross-sectional view showing the operation of the spring with the scaffold plate in a horizontal use state. FIG. 12 is a perspective view of a handrail standing portion. DESCRIPTION OF SYMBOLS 1a Scaffolding board 1b Scaffolding board 3 Pin 6 Guide pipe 9 Sliding rod 10a Diagonal supporting rod 10b Diagonal supporting rod 11a Pin leg 11b Pin 15 Free running wheel 16a Telescopic leg 16b Telescopic leg 16c Telescopic leg 16d Telescopic leg 21 Side Bar 24 Stopper-rod 25 Stopper-rod 26 Pin 27 Pin 34 Spring 37 Outer frame 38 (of scaffold) Opening

Continuation of front page       (56) References JP-A-3-115655 (JP, A)                 JP-A-62-189012 (JP, A)                 Actual opening Hei 4-72133 (JP, U)                 Shokai Sho 56-56335 (JP, U)                 Actual opening sho 59-196631 (JP, U)                 Tokiko 49-42382 (JP, B1)

Claims (1)

(57) [Claim 1] A central end of a split scaffold plate having an outer frame formed of a square pipe with an open end is connected by a pin, and the outer end thereof can be folded only downward. The slide rod is inserted from the lower end into the guide pipe hanging down from the connecting portion, and the diagonal support rods are provided between the lower end of the slide rod and the scaffolds on both sides by fastening both ends with pins. The slide rod is configured to be freely fixed to the guide pipe when the scaffold plate is used horizontally and when it is folded, and a telescopic leg having a free running wheel at a lower end is freely foldable below an outer corner of each scaffold plate. A stopper rod is provided between the telescopic legs on both sides and the lower end of the guide pipe, with both ends fastened with pins, and an appropriate number of horizontal rails are provided between the telescopic legs at both ends, and the scaffold plate is provided. At the opening at the end of the outer frame, the lower end of the handrail Fixed the provided insertion portion insertion and pin, further feet
It is stretched across both scaffolds below the central connection of the floor
The spring that extends when the scaffold plate is used horizontally
The fixed stay provided on the scaffold and the other stay provided on the other scaffold
It works only when both scaffolds are used horizontally and when the scaffolds are folded
Is stretched between movable stays stored in a free state.
Work platform characterized by comprising Te.