JP3511158B2 - Receiving stage with curing net - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving stage with a curing net provided on a floor opening formed in a floor plate such as a slab and capable of opening and closing the floor opening. is there. 2. Description of the Related Art Conventionally, in a construction site of a building or the like, a loading stage that is protruded outwardly is often used when taking in a material or the like into a skeleton during construction. And, in the underground construction that adopted the reverse hitting method, etc., in order to quickly take in the material at the middle floor of the multi-story basement, in the middle of each of the floors that were previously constructed with floor openings in advance with floor openings The cargo receiving stage is temporarily installed at the floor opening of the floor. Since the floor opening is also used as an opening for unloading in the load receiving stage which is installed so as to overhang the floor opening in the underground construction, when the load receiving stage is not used, the load receiving stage is not used. There is also a device for retreating the stage by a slide mechanism or a folding mechanism so as not to block the floor opening. On the other hand, a load receiving stage installed (temporarily) at the floor opening has an additional effect of preventing the floor opening from falling, in addition to the purpose of receiving the load. However, when the floor opening is large, a curing net is provided temporarily to prevent falling in the remaining part of the opening other than the overhanging load receiving stage. When the work is performed, the curing net is also opened and closed each time so as not to hinder the work. The opening and closing of the curing net is performed manually by a worker each time, and is performed in a detachable manner. For this reason,
Unnecessary labor that is not directly related to the earth unloading work frequently occurs, and the risk of the worker falling off due to the attachment and detachment of the curing net becomes a problem, and it is necessary to take safety measures to avoid the danger. there were. Incidentally, in a normal floor opening where a loading stage is not temporarily installed, for example,
As disclosed in Japanese Patent Publication No. -40229 and Japanese Patent Publication No. 6-74647, there is an automatic device that can open the floor opening by expanding or retracting the curing net as needed. Although proposed, there was no proposal that could operate with the above-mentioned receiving stage. In view of the above circumstances, it is an object of the present invention to enable the receiving stage and the curing net to operate together, and to open and close the curing net without the need for an operator. An object of the present invention is to reduce labor required for opening and closing the installed floor opening and improve safety. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a guide rail disposed on both sides of a floor opening of a floor plate, and a guide rail on the floor plate guided by the guide rail. A slide deck provided so as to be able to move forward and backward from the floor opening to the floor opening, and a net rear portion is arranged on an opening side of the floor opening facing the slide deck, so that the front portion of the net can move in the longitudinal direction of the guide rail. A curing net which is supported and is provided so as to be deployable at the floor opening, and a net opening / closing means for moving a net front portion of the curing net in a direction opposite to a moving direction of the slide deck when the slide deck is moved. The object of the present invention is to solve the above problem by providing a receiving stage with a curing net characterized by the following. In the present invention, when the slide deck moves along the guide rail from above the floorboard to above the floor opening, the net opening / closing means pulls out the net front part of the curing net toward the slide deck, and The floor opening can be closed by the curing net deployed at the opening and the slide deck moved to the floor opening similarly to the curing net. In addition, when the slide deck on the floor opening moves to the upper side of the floor along the guide rail, the net opening / closing means pulls the front part of the curing net back to the rear part of the net, and the slide deck and the curing net are respectively separated. By retreating, the floor opening is opened. Next, the present invention will be described in detail with reference to the embodiments shown in FIGS. In the drawing, reference numeral 1 denotes a receiving stage with a curing net. The receiving stage 1 comprises a floor plate a composed of a stage body portion and a slide net portion.
A pair of guide rails 2 arranged on and parallel to a floor plate a on both sides of the floor opening b, and guided by the guide rails 2 A self-propelled slide deck 3 that can move forward and backward from the floor plate a to the floor opening b;
A curing net 4 that can be deployed toward the slide deck from an opening side c of the floor opening b that faces the slide deck 3; the slide deck forms a stage body; Represents a slide net. Each of the guide rails 2 is made of a steel material such as an H-section steel. The upper flange portion is used as a guide surface 5, and the guide rails 2 are opposed to each other (formed by upper and lower flanges and a web). Recess
In FIG. 5, a net opening / closing means 6 for opening / closing a curing net, which will be described later, is disposed so as to be attached to the web portion (see FIG. 5). Each of the guide frames in the illustrated embodiment is longer than the opening width d of the floor opening b in the direction along the guide rail.
As described above, the slide deck 3 is guided by the guide rails and can advance toward the floor opening (the direction in which the floor opening is closed), and retreat from the floor opening to the floor plate (the floor opening is closed). Opening direction). The slide deck 3 has a deck top plate 8 stretched on a frame-shaped deck frame 7, and a connecting beam 9 passed over two guide rails is attached to the front side of the deck frame 7. As shown in FIG. 5, a driven wheel 10 which rotates in contact with the guide surface 5 is attached to each of the ends of the connecting beam 9 located above the guide rail 2, and a plate member is further provided from the end. And a side roller 11 that contacts the side of the guide surface 5 from the side.
Is attached to the plate member. FIG.
From FIG. 3 to FIG. 3, for the sake of simplicity, the driven wheel does not include a roller that rolls on the guide rail, but the driven wheel rolls on the guide rail in a state in which a plurality of rollers are arranged side by side. It touches as much as possible. Also,
A drive wheel 13 which is rotatably mounted on the deck frame 7 and rotates in a forward direction or a reverse direction in response to a drive from a traveling motor 12 is arranged on a rear side. This drive wheel 13
The slide deck 3 can move forward and backward by rotating forward or backward in contact with the floor plate a. When the slide deck 3 advances to a required position of the floor opening b, the stage main body can receive the load. The space occupied by the slide deck is opened. Reference numeral 14 is a slope deck connected to the rear of the deck frame. The length of the slide deck 3 in the direction between the guide rails is a length that can be accommodated between the guide rails, and is equal to or larger than the opening width of the floor opening in the direction between the guide rails. And the side of the floor opening are provided so as to overlap vertically. That is, no gap is formed in the vertical direction. In each of the recesses where the guide rails 2 face each other, a wire rope 15 for holding the net is stretched over the longitudinal direction of the guide rails 2 and close to the lower surface flange. The curing net 4 is positioned inside the floor opening b in a state where the curing net 4 is supported by the net holding wire rope 15. Specifically, a net hanger 16 is attached to a side portion (guide rail side) of the curing net 4 at regular intervals, and an upper end of the net hanger 16 is movable with respect to the wire rope 15 for holding the net. By being attached, the curing net 4 can be deployed in the longitudinal direction of the guide rail 2. Further, the rear portion 17 of the net (a portion which is rearward when deployed toward the slide deck) is fixed by being fixed to the above-described opening side c of the floor opening b. A curing net is set up from c to the slide deck side. The size of the curing net 4 is set to be lower than the slide deck 3 when it has advanced to the maximum, and the net front part 1 on the slide deck side.
The size can be expanded to the position where 8 enters. In the net opening / closing means 6 incorporated in each recess of the guide rail 2, a sprocket 19 is provided at an end of the guide rail 2 on the slide deck side.
And the spur gear 20 are coaxially mounted rotatably in the same direction, and the spur gear 21 and the sheave 22 meshing with the spur gear 20 are coaxially rotatably mounted in the same direction with a required reduction ratio. The combination of the sprocket 19 and the spur gear 20 is
It is arranged above the combination of 1 and sheave 22. A sheave 23 is also rotatably attached to the other end (curing net side) of the guide rail 2, and the tow wire rope 2 is provided between the two sheaves 22 and 23.
4 has been bridged. Further, a tow plate 25 is fixed to the tow wire rope 24, and the tow plate 25 is engaged with the net hanger 16 located on both sides of the net front portion 18 of the curing net 4. Thus, in the net opening / closing means 6, the sprocket 1
A spur gear 20 coaxial with 9 meshes with a spur gear 21, and a tow wire rope 24 extends over a sheave 22 coaxial with the spur gear 21 and a sheave 23 at the other end of the guide rail. Further, since the tow plate 25 is attached to the tow wire rope 24, the tow wire rope 24 moves so as to rotate between the sheaves 22 and 23 when the sprocket 19 rotates. Then, the traction plate 25 moves in the longitudinal direction of the guide rail. Since the towing plate 25 is to be engaged with the net hanger 16 at the front portion 18 of the net, the rotation of the sprocket 19 causes the curing net 4 to be pulled in the direction in which it is deployed and in the direction in which it is closed. In order to convert the lateral movement of the moving slide deck 3 into the rotation of the sprocket 19 of the net opening / closing means 6, a chain is attached to each side of the slide deck 3 as shown in FIG. Bracket 2
The roller chain 27 is extended in the longitudinal direction of the guide rail while being supported by the bracket 26 for chain attachment, and the roller chain 27 is engaged with the sprocket 19 from below. . Since the movement of the slide deck 3 is transmitted to the sprocket 19 via the roller chain 27 in this manner, first, when the drive wheel 13 rotates, the slide deck 3 moves forward in the direction to close the floor opening. The sprocket 19 shown in FIG. 3 rotates counterclockwise around the tow wire rope 24, and the tow plate 25 attached to the lower side of the tow wire rope 24 slides from the opening side c. It moves toward the deck side (moves from right to left on the drawing), so that the curing net 4 is unfolded so as to enter below the forwardly moving slide deck. When the slide deck reaches the maximum overhang position, the rotation of the drive wheels is stopped by the operation of position detection means and the like, and at that time the floor opening between the slide deck and the developed curing net is performed. The part is closed. On the other hand, when opening the floor opening b, when the slide deck 3 retreats by the action of the driving wheel 13, the sprocket 19 rotates clockwise when retreating, and the tow wire rope 24 connects the sheave 2.
Turns counterclockwise between 2, 23, and the traction plate 2
5 moves in a direction approaching the opening side c. The net front portion 18 is pulled by the traction plate 25, and the curing net 4 is closed. When the slide deck does not touch the floor opening, the movement of the drive wheels is similarly stopped by the position detecting means and the like, and when the slide deck stops, the traction plate closes to the opening side c. It is provided so as to stop and the curing net is contracted on the opening side c side. In this way, when the slide deck retreats and stops, the curing net is also kept in a contracted state, and it becomes possible to carry out soil lifting work and the like through the opened floor opening. As described above, the load receiving stage with a curing net according to the present invention comprises a guide rail disposed on both sides of a floor opening of a floor plate, and a floor guided by the guide rail from above the floor plate. A slide deck provided so as to be able to advance and retreat over the opening, a net rear portion is disposed on an opening side of the floor opening facing the slide deck, and a net front portion is supported movably in the longitudinal direction of the guide rail. And a net opening / closing means for moving a net front portion of the curing net in a direction opposite to a moving direction of the slide deck when the slide deck is moved. It is assumed that. Thus, when the slide deck advances, the curing net is advanced toward the slide deck by the net opening / closing means,
In addition, since the curing net is retracted by the net opening / closing means at the time of retreating the slide deck and is brought close to one side of the floor opening, it is not necessary to forget to put the curing net after finishing the unloading work, There is no danger of the worker falling due to the removal and restoration of the curing net. In the receiving stage with the curing net, the structure can be roughly divided into guide rails, slide decks, and curing nets that are placed on both sides of the floor opening. Installation and dismantling of the attached receiving stage can be facilitated. In addition, if the slide deck having a drive source is moved forward and backward to open and close the curing net via the net opening / closing means, the opening and closing of the floor opening can be automated by controlling the operation of the slide deck having the drive source. As a result, it is possible to reduce the cost involved in opening and closing the floor opening and the like, thereby achieving an effect with excellent practicability.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing an example of a load receiving stage with a curing net according to the present invention in a plan view. FIGS. 2A and 2B are cross-sectional views each showing an example, wherein FIG. 2A is an explanatory diagram showing a state in which a floor opening is closed, and FIG. 2B is an explanatory diagram showing a state in which a floor opening is opened. FIG. 3 is an explanatory diagram showing a cross section taken along line AA of FIG. 1; FIG. 4 is an explanatory diagram showing a cross section taken along line BB of FIG. 1; FIG. 5 is an explanatory view showing a net opening / closing means from a guide rail sectional direction. [Description of Signs] 1 ... Receiving stage with curing net 2 ... Guide rail 3 ... Slide deck b ... Floor opening 4 ... Curing net 6 ... Net opening / closing means 9 ... Connecting beam 12 ... Running motor 13 ... Driving wheel 24 ... Towing Wire rope for

Claims (1)

(57) [Claim 1] A guide rail disposed on both sides of a floor opening of a floor plate, and provided so as to be able to move forward and backward from the floor plate to the floor opening guided by the guide rail. The rear of the net is arranged on the side of the slide deck and the opening side of the floor opening facing the slide deck, and the front of the net is movably supported in the longitudinal direction of the guide rail and provided so as to be deployable in the floor opening. And a net opening and closing means for moving a front portion of the curing net in a direction opposite to a moving direction of the slide deck when the slide deck is moved.