JPH0536076Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a lifting ramp attached to a liner plate used in excavation holes for vertical shaft excavation, deep foundation construction, etc.

(Prior Art) It is well known that a liner plate is attached to the excavated hole to prevent the wall from collapsing after being dug. Regardless of whether it is shallow, if it is deep, a ramp must be attached to this liner plate for elevation. Conventionally, this ramp was fixed to the liner plate and left in place after construction was completed. Needless to say, such things are wasteful. To solve this waste and make it removable, the product shown in Utility Model Publication No. 60-42154 appeared.

This is done by attaching steps to the flanges that connect the top and bottom of the liner plate. Since the height of liner plates is usually 50 cm, the interval between the flanges provided to connect the upper and lower liner plates is naturally 50 cm. Therefore, if one step is attached to each flange, the distance between the steps becomes too wide, making it inconvenient to ascend and descend.

Therefore, in the above-mentioned known step, two steps are attached to one flange (the top and bottom are connected) so that one projects upward and the other diagonally projects downward, and a step provided at the tip of each The spacing between reinforcing bars is 25cm.
The upper flange of the top liner plate has
It goes without saying that one step should only be attached to the bottom. The liner plate has holes at predetermined intervals for passing bolts to connect the upper and lower parts, so use the holes to connect the upper and lower parts.
Attach two steps to the flange at the same time. Since this step is fixed to the flange with bolts and nuts, it can be removed by removing the bolts and nuts after the construction is completed.

(Problem to be solved by the invention) By the way, in the above-mentioned conventional method of fixing two steps to each flange to form a ramp, it is natural that these steps must be fixed together each time a liner plate is connected. There is the annoyance of not having to do so. Furthermore, since it is also used to connect the liner plates to each other, when removing the liner plates, after removing the bolts and nuts, the bolts and nuts must be re-tightened into the holes in the removed flange in order to connect the liner plates. There was also the problem of not being able to do so.

The present invention aims to eliminate such inconvenience and provide a ramp that can be installed independently of the connection of liner plates.

[Structure of the invention] (Means for solving the problem) Therefore, the present invention provides a ladder-like ladder with steps attached to the side plates on both sides at predetermined intervals, so that both side plates can be connected vertically. At the same time, the lower end of the side plate projects diagonally downward from the side plate, and the distal end thereof forms a mounting part that is placed on the flange. The present invention is characterized in that a fixture is provided, the tip of which comes into contact with the slope of the liner plate when the liner plate is moved. The above mounting part has bolts attached to fix the flange,
Provide a hole large enough to allow a nut to pass through, and insert a bolt or nut into the hole when installing this ramp.

The length of the side plate should correspond to the height of the liner plate, but most preferably it should correspond to twice the length.

The upper end of the uppermost step of this ramp is fixed to a mounting plate that is fixed to the upper flange of the uppermost liner plate, and it is desirable that the handrail is also fixed to the mounting plate. It is preferable that the main body of this handrail is formed in an inverted U shape, the lower ends of which are connected by a connecting plate, and the connecting plate is fixed to the mounting plate. Additionally, it is desirable that the handrail be wider than the spacing between the side panels.

(Function) To attach this ladder-like ladder to the inside of the liner plate, fix the top side to the mounting plate and the bottom side to the lower flange of the liner plate below or to the lower flange of the liner plate below. All you have to do is place it on top and slide the fixture.

At this time, as described above, insert the bolt head or nut fixing the flange into the hole provided in the leg rest. The legs protrude diagonally downward from the side plate, so if you place the leg rest on the flange,
The ladder section can be approximately vertical. When the fixture provided to allow the leg to slide freely is pushed diagonally downward, its tip comes into contact with the slope of the mountain of the liner plate, thereby preventing the leg from lifting up.

The legs themselves are not particularly fixed, but the heads of nuts or bolts are inserted into the holes in the mounting part, so
There is no deviation in plane beyond the play between the hole and the nut, and there is no upward movement since the tip of the fixture touches the peak of the liner plate. Therefore, the legs will not come off the flange, making the ramp sufficiently stable for practical use.

Since a hole is also made at the lower end of the side plate, the lower end of the side plate can be used as a mounting plate when connecting the next ramp. The lower side can be similarly fixed by placing the legs on the flanges of the lower liner plate. In this way, a long ladder-like ladder can be formed by sequentially connecting the ladders downward.

(Embodiment) FIG. 1 shows a ramp 10 according to an embodiment of the present invention.
Two side plates 1 with mounting holes 11 and 12 on the top and bottom
Four pipes 14 serving as stepping stones are installed at regular intervals between 3 and 13 to form a ladder. Of course, this step stool is not limited to a pipe, and may be made of reinforcing steel or the like. Further, it is optional to process or attach a non-slip material to the surface.

The interval between both side plates 13, 13 is such that the lower side is slightly wider than the upper side, so that the upper side can be inserted between the lower sides. This is to connect the ramps 10, so that the upper holes 11 of the lower ramps are aligned with the holes 12 and fixed with bolts and nuts to connect them. You can make the top wider and the bottom narrower. Further, it is optional to change the shape as appropriate to facilitate connection.

Legs 15 for stabilizing the lower side are attached to the lower side of the side plate 13 so as to project diagonally downward. As shown in FIGS. 2 and 3, this leg 15 includes an overhanging portion 16 projecting from the side plate 13 in a substantially perpendicular direction, an inclined portion 17 inclined diagonally downward from the overhanging portion 16, and a distal end thereof. It has a shape having a vertical portion 18 oriented substantially perpendicularly to the surface thereof, and a mounting portion 20 having a hole 19 and having a substantially horizontal surface. Of course, if the placing part 20 is located a predetermined distance away from the side plate 13 from the overhang part 16 to the vertical part, the shape may be appropriately curved.
Any other shape may also be used. This hole 1
Numeral 9 is for passing the nut 34 (FIG. 5) of the bolt 33 fixing the flange 35. The legs 15 are provided on both the left and right side plates 13, but it is desirable that the holes 19 of the legs 15 attached to one side be elongated holes.

A fixture 23 made of a rectangular plate having an L-shaped hole 22 is attached to the inclined portion 17 of the leg 15, as shown in FIG. This fixture 23 is inserted through the hole 22 into the leg 15 and caulked with two mounting pins 29, 29 so as to be slidable diagonally downward. Instead of caulking the pins 29, 29, bolts or nuts may be used. The reason why the two pins 29, 29 are used in this way is to stabilize the sliding direction, and the reason why the hole 22 is L-shaped is as shown by the solid line in FIG. This is to ensure that one pin 29 is inserted into the tip 22a of the L-shape before installation, so that it can be stably held and work can be done easily. Even if the hole 22 is a straight line, there is no particular difference in the function and effect as a ramp.

A guard 54 is further provided on the upper side of the side plate 13.
(Fig. 4) is attached, and a guard is similarly attached to the lower side, and sleeves 26 and 27 are attached to which a landing 25 is attached if necessary. This side plate 13 is located between the two sides of the liner plate 30.
The length is said to be equivalent to the height of a single piece. Of course, the height is not limited to this, and may be the height of one sheet, or the height of three sheets. In any case, it is necessary to match the height of the liner plate 30.

Liner plate 3 of the ramp 10 with the above configuration
0 will be explained below based on FIGS. 4 and 5. In the case of the present ramp 10, the flanges are not fixed by the bolts 33 and nuts 34 that connect them, so the liner plate 30
can be connected as usual without considering the present ramp 10.

As shown in FIG. 5, an H-shaped steel may be attached between the upper and lower liner plates 30 as shown at 31 or 32 for reinforcement. The liner plate 30 has a corrugated plate shape, and the top ridge 30a of the lower flange 35 protrudes inward as shown in FIG.
Therefore, when H-shaped steel is installed,
The legs 15 of the ramp 10 must be inserted through the gap between the crest 30a and the H-shaped steel. Therefore, as shown in FIG. 5A, the ramp 10 is tilted, the leg 15 is inserted between the H-shaped steel and the ridge 30a, and the leg 15 is placed on the flange 35.

As mentioned above, the hole 19 of the mounting part 20 of the leg 15 is
Since it is larger than the nut 34, the leg 15 is placed on the flange 35 by inserting the hole 19 in the nut 34 as shown in FIG. In addition, in this drawing D, type steel 31 or 3
2 is omitted.

Until the leg 15 is placed on the flange 35, the fixture 23 is held on the leg by inserting one pin 29 into one end 22a of the L-shape of the hole 22. leg 1
5 on the flange 35, and then press it downward while rotating the fixture 23 as shown in Figure B.
As shown in FIG. 3C, the fixing portion 23 slides and comes into contact with the sloped portion of the crest 30a of the liner plate 30. In other words, the shape of the L-shaped hole 22 of the fixture 23 and the direction of inclination of the pin 29 are such that when the fixture is lowered along the pin 29, the tip of the fixture 23 is aligned with the peak of the liner plate 30. The shape and position are such that it contacts the inclined portion of 30a from below. This fixture 23 slides downward, that is, in a direction in which it falls under its own weight, and since the two pins 29 are inserted into the straight portions of the holes 22 at this time, it does not rotate. Since the tip thereof contacts the mountain 30a from below, the leg 15, that is, the main ramp 10, does not rise any further.

That is, by inserting the nut 34 into the hole 19, it is prevented from moving on a horizontal plane, and by the fixture 23, it is prevented from floating, thereby stabilizing the lower side of the ramp 10.

The upper side of the ramp 10 is constructed as shown in FIG. A mounting plate 40 is fixed to the flange 35 of the uppermost liner plate 30, and the main ramp 10 is attached to this. This mounting plate 40
One end protrudes into the inside of the liner plate 30, and a mounting hole 4 is inserted into the protruding tip.
1 is drilled, and the hole 11 provided in the side plate 13 of the ramp 10 is aligned with this mounting hole 41, and then fixed with a bolt 42 and a nut.

The mounting plate 40 is fixed to connecting holes 43 formed at regular intervals in the flange 35 with bolts 44 and nuts. Since the mounting plates 40 are for both side plates 13, two of them are naturally fixed, but the distance between them is such that one connecting hole 43 is provided as shown in the figure. As described above, in this embodiment, the mounting plate 40 is composed of two separate members, but there is no problem if it is composed of a single member having a shape in which both parts are connected. The part provided with the hole 41 is connected to the side plate 13,
It is sufficient if the spacing is set to 13, and the liner plate 30 is exposed inside the liner plate 30.

It is desirable that this ramp 10 is provided with a handrail for entering and exiting. Therefore, in this embodiment, two holes 45, 45 are bored in the mounting plate 40 in addition to the mounting hole 41, and a handrail 47 is fixed to each mounting plate 40 through these holes. The handrail 47 has a main body 48 formed by bending a pipe into an inverted U shape, and the lower ends of the main body 48 are connected by a connecting plate 49, and holes 50, 50 are bored in the connecting plate 49. This hole 50 is aligned with the holes 45, 45 of the mounting plate 40 and fixed with bolts 51 and nuts 52. In the case of this embodiment, since the individual mounting plates 40 are fixed to the holes 43,
The interval becomes a little narrower. There is no particular problem with using the ladder, but it is a little uncomfortable when holding on to the handrail and changing the direction of your body. Therefore, in this embodiment, both ends of the connecting plate 49 are bent so that the distance between the connecting plates 49 and the handrail body 48 is widened.

A sleeve 53 is fixed to the handrail body 48, into which a guard 54 is inserted and attached. The guard 54 is also attached to the side plate 13, and as shown in the figure, shafts 55, 55, which can be inserted into the sleeves 24, 26, 27, 53, are fixed to the tip of the plate which is curved at a predetermined radius.

When adding another ladder under the main ladder 10 installed as described above,
The hole 12 on the lower side of the side plate 13 is connected to the hole 41 on the mounting plate 40.
It can be installed similarly as an alternative to .

When the ramps 10 are connected and made long, landings 25 are installed at intervals of about 5 m. Since this is not directly related to the present invention, its details will be omitted.

When removing this ramp 10, tighten the bolts 33 and nuts 3 that connect the upper and lower liner plates 30.
Fixture 2 is simply inserted into 4.
3 upward and remove the bolts 42 that were fixed on the upper side of the side plate 13. There is no need to remove the bolts 33 and nuts 34 and tighten them again as in the conventional case.

[Effects of the invention] As described above, the present invention has a basic shape of a ladder with a plurality of steps attached between the side plates arranged substantially parallel to each other, and has a mounting part on the lower end of the side plate to be placed on the flange. The leg is configured to protrude from the side plate, and the mounting part is provided with a hole for inserting the head of the nut or bolt that fixes the flange.By inserting the head of the nut or bolt into this hole, the horizontal direction of the leg can be adjusted. The movement is restricted, and the fixing device is slidably attached to the leg, and this is slid to hit the slope of the corrugated plate of the liner plate to restrict the vertical movement of the leg, making it easy to install. It can be installed in In addition, as mentioned above, on the lower side, simply insert the bolt or nut that connects the flanges into the hole in the mounting part and lower the fixture, so there is no need to fix it with the bolt or nut that connects the flanges. A ramp can be installed. What's more, by simply removing the fixings and removing the bolts and nuts that hold the top end of the side plate in place, you can easily remove the liner plate without tampering with it.

Furthermore, since the uppermost end of this ramp is fixed to a mounting plate, an inverted U-shaped handrail can be attached using this mounting plate, making it easier to go up and down using the ramp. Moreover, it is possible to freely widen the distance between both sides of the handrail, and the widening of the distance makes it easier to change direction after getting on the flange.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of this embodiment, Fig. 2 is a perspective view of the leg portion, Fig. 3 is a side view of the leg portion, and Fig. 4 shows the state in which this embodiment is attached to a liner plate. The exploded perspective views and FIGS. 5A to 5D are explanatory diagrams showing the procedure for mounting the legs of this embodiment on the flanges. 10... Tarap, 11, 12... Hole, 13...
...Side plate, 14...Step stool, 15...Legs, 19...
Hole, 20... Placement part, 23... Fixture, 30...
Liner plate, 35...flange.

Claims (1)

[Claims for Utility Model Registration] (1) In a ramp that has flanges at the top and bottom, is connected to the bottom by the flanges, and is attached to the inside of the liner plate that protects the wall surface of the excavation hole so as to move up and down. A side plate having a length corresponding to the height of one or more liner plates, arranged approximately parallel to each other at a predetermined interval, and having holes bored in the upper and lower ends, and a liner plate that is passed between both side plates. A mounting device that includes a plurality of step stools fixed to each other, and a mounting device that extends diagonally downward from the side plate, and has a hole at the tip that is large enough to pass through the bolts and nuts that are placed on the lower flange of the liner plate and fix the flange. A leg is fixed to the lower side of the side plate that forms a part, and the leg is slidably attached to the leg, and when it is slid in the direction of protruding from the leg, its tip touches the slope of the mountain of the liner plate. a fixture that abuts and restricts the upward movement of the leg; and a mounting plate that is fixed to the upper flange of the uppermost liner plate and that fixes the upper end of the side plate to the part that protrudes inside the excavated hole. A ramp for raising and lowering a liner plate, characterized by having: (2) The ramp for lifting and lowering a liner plate according to claim 1, wherein the length of the side plate corresponds to twice the height of the liner plate. (3) The liner according to claim 1 or 2, wherein the main body is formed in an inverted U shape, and two handrails whose lower ends are connected by a connecting part are fixed to the mounting plate at a constant interval. A ramp for raising and lowering the plate. (4) The ramp for lifting and lowering a liner plate according to claim 3, wherein the interval between the handrails is wider than the interval between the side plates.