JPH0655997U - Retractable work floor of elevator type scaffolding device and its safety device - Google Patents

Abstract

(57) [Summary] [Purpose] When using a scaffolding device in the tank of a ship under construction, provide a work floor that minimizes the construction holes to be opened in the upper deck, and when loading and unloading the work floor. Facilitate the handling of. [Structure] A rectangular main body work floor, a first folding work floor hinged to opposite sides of the work floor, and a first folding work floor hinged to the other side of the first folding work floor. It consists of a two-fold folding work floor and a drawer work floor that can be placed in and out of the second folding work floor, and the drawer work floor is stored in the second folding work floor. , Fold the 2nd folding work floor onto the 1st folding work floor, and then turn these folded 1st and 2nd folding work floors upright around the hinges. By doing so, the overall floor area was reduced and the openings provided in the upper deck could be made smaller.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a retractable work floor of an elevator type scaffolding device used for a ship under construction and a safety device therefor.

[0002]

[Prior art]

 When using a scaffolding device in the tank of a ship that is currently under construction, a hole for construction was made in the upper deck, and the scaffolding device was carried in through this hole. Since the hole for this construction was opened according to the size of the working floor, the size was inevitably very large.

[0003]

[Problems to be solved by the device]

 When using a scaffolding device in the tank of a ship under construction, provide a work floor that minimizes the construction hole to be opened on the upper deck, and facilitate handling of the work floor during loading and unloading. Is an issue.

[0004]

[Means for Solving the Problems]

 A rectangular main work floor, a first folding work floor hinged to opposite sides of the work floor, and a second folding work floor hinged to the other side of the first folding work floor. It consists of a folding work floor and a drawer work floor that can be placed in and out of the underside of the second folding work floor.After storing the drawer work floor in the second folding work floor, Folding the second folding work floor Folding the first folding work floor onto the first folding work floor, and rotating these folded first and second folding work floors upright by rotating them around the hinges. As a result, the total floor area was reduced and the openings in the upper deck were made smaller. Further, the main work floor of the retractable work floor is supported on a lift table which is guided by four columns to ascend and descend, and the pinion driven by a motor provided on the lift table is aforesaid. It was driven by engaging with a vertically long drive rack fixed to the column side. Further, a stopper is rotatably supported on the lift base, the upper end of the stopper is attracted by an electromagnet, and the other end is engageable with and disengageable from a stepped engaging portion of a stopper rack fixed to a column. When is demagnetized or when there is a power failure, the stopper rotates to engage with the stepped engaging portion of the stopper rack to prevent the lifting table from falling. Further, the encoder converts the rotational speed of the drive shaft into a pulse, and when the pulse exceeds a predetermined number, a signal is emitted to demagnetize the electromagnet.

[0005]

【Example】

 This device can rotate 90 ° on one side of the first folding work floor 2 which is a right-angled isosceles triangle on both sides of the main body work floor 1 installed on the lifting platform 8 (Fig. 4) by the hinge 3. Is attached to. Further, the second folding work floor 4 can also be folded on the other side of the first folding work floor 2 on the left and right by the hinge 5 on the first folding work floor 2 as well. It is installed. Further, a drawer work floor 6 is stored on the underside of the second folding work floor 4 of each square so that the work floor 6 can be pulled in and out laterally (arrow in FIG. 1).

The present retractable work floor is manually operated as follows. For storage: Put the drawer work floor 6 under the floor of the second folding work floor 4. Fold the second folding work floor 4 around the hinge 5 toward the first folding work floor 2 side. With the second folding work floor 4 overlaid on the first folding work floor 2, pull the first folding work floor 2 toward the main work floor 1 side, and Stand vertically upright. In the case of unfolding: The first folding work floor 2 which is in a vertical state with respect to the main body work floor 1 is tilted to the side to be in a horizontal state. The second folding work floor 4, which overlaps the first folding work floor 2, is rotated 180 °. The drawer work floor 6 stored in the underside of the second folding work floor 4 is pulled out to the side.

FIG. 4 shows the lifting device during the work on the work floor described above. The work floor moves up and down along the four columns 7. Reference numeral 8 is an elevator, on which a drive motor 9, a reduction gear mechanism 10, a drive shaft 11, a pinion 12 at the tip of the drive shaft 11 and the like are provided. The climbing platform 8 is moved up and down along the four columns 7 by the guide rollers 13. Reference numeral 14 is a drive rack provided on the column 7, and meshes with the pinion 12. When the pinion 12 is rotated by the motor 9, the lift 8 is moved up and down via the rack 14.

Reference numeral 15 is a stopper, and 16 is a stopper rack. As shown in FIG. 5, when the stopper 15 is pivotally supported at the lift table 8 by a pin 18 at the center and the upper end is attracted by the excitation of the electromagnet 17, the stopper 15 is engaged with the stopper rack 16 in a stepwise manner. When the electromagnet 17 is demagnetized when it is disengaged from the portion, the stopper 15 rotates around the pin 18 by its own weight and engages with the teeth 16a of the rack 16 to prevent the lift 8 from falling.

As a mechanism for operating the stopper 15, an encoder (not shown) is attached to the drive shaft 11 of the scaffolding device so that the rotation speed is converted into the number of pulses. The converted pulse number is recognized by the pulse counter, but an appropriate pulse number is set in advance for this pulse counter, and the pulse number per unit time exceeds the setting range (abnormality such as falling). In this case, a pulse counter should be used to output a signal. Then, when the relay is actuated by the output signal and the electric power flowing to the electromagnet 17 is cut off and the magnetic force disappears, the stopper 15 rotates around the pin 18 due to gravity and falls, and the stepped engaging portion of the rack 16 is dropped. It is designed to engage with 16a. In the case of a power failure, the stopper 15 operates similarly.

[0010]

【effect】

 A first folding work floor hinged to opposite sides of the rectangular main work floor, and a second folding work floor hinged to the other side of the first folding work floor. , A drawer work floor that can be put in and out of the underside of the second folding work floor, the drawer work floor is stored in the second folding work floor, and then the second folding work is performed. Fold the floor first to fold it on the work floor, and then rotate the folded first and second fold work floors around the hinges so that they stand upright to reduce the total floor area. Since the number of holes has been reduced and the openings on the upper deck can be made smaller, the construction holes on the upper deck of the ship can be made smaller, facilitating the construction of construction holes and the closing work. In addition, the work floor has been made compact, which makes it convenient for handling and storage. The stopper as a safety device is always held by an electromagnet, and it is rotated by gravity only when the electromagnetic force is cut off and engages with the stepped engaging part of the rack, so even if the power is cut off. A safety device works and is extremely safe.

[Brief description of drawings]

FIG. 1 is a plan view showing a work floor according to the present invention when it is unfolded.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a view on arrow BB in FIG.

FIG. 4 is a perspective view of a lifting device for a work floor.

FIG. 5 is a detailed view of a stopper.

[Explanation of symbols]

1 Main work floor 2 1st folding work floor 3 Hinge 4 2nd folding work floor 5 Hinge 6 Drawer work floor 7 Struts 8 Lifting platform 9 (for driving) Motor 10 Reduction mechanism 11 Drive shaft 12 Pinion 13 Guide roller 14 (For driving) Rack 15 Stopper 16 (For stopper) Rack 17 Electromagnet 18 pin

Claims (4)

[Scope of utility model registration request] 1. A rectangular main body work floor, a first folding work floor hinged to opposite sides of the work floor, and a hinge joint further to other sides of the first folding work floor. It consists of a second folding work floor and a drawer work floor that can be placed in and out of the second folding work floor, and the drawer work floor is stored in the second folding work floor. After that, the second folding work floor is folded on the first folding work floor, and these folded first and second folding work floors are rotated around the hinges. To reduce the total floor area by standing upright,
An elevator that can reduce the size of the holes on the upper deck.
Retractable work floor of the Ta-type scaffolding device 2. A main body work floor portion of a retractable work floor is supported on a lift table which is guided by four columns to ascend and descend, and the lift table is driven by a motor provided on the lift table. A retractable work floor for an elevator scaffolding apparatus according to claim 1, wherein said pinion is driven by being engaged with a vertically long drive rack fixed to said pillar side. 3. A stopper is rotatably supported on a lift table,
The upper end of the stopper is attracted by an electromagnet, and the other end of the stopper can be engaged with and disengaged from a stepped engaging portion of a stopper rack fixed to a column. The safety device for a retractable work floor of an elevator type scaffolding device according to claim 2, wherein the safety device is engaged with the elevator table to prevent the elevator table from falling. 4. The housing for an elevator scaffolding apparatus according to claim 3, wherein the rotation speed of the drive shaft is converted into a pulse by an encoder, and a signal is emitted to demagnetize the electromagnet when the pulse exceeds a predetermined number. Work floor safety device.