JPH0423951Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to an operating device for earth retaining supports, and more specifically, for example, on the opposite side walls of excavated trenches in which sewer pipes and telephone lines are buried. An earth retaining support that is installed between a pair of horizontally installed uprights and that aims to maintain the distance between both side walls and prevent the collapse of earth and sand by supplying pressure fluid, and this support. This invention relates to an improvement in an operating device for an earth retaining support, which comprises an operating rod for discharging pressure fluid and lifting the support.

[Prior art] The conventional operation device for this type of earth retaining support is as follows:
As shown in FIG. 15, the base end of cylinder a,
Pressing plates c and d are respectively attached to the base end of the piston rod b that engages with the cylinder a in a telescopically slidable manner, and these pressing plates c and d are attached to the opposing side walls f and g of the excavated groove e. The side walls f, g of the excavated groove e are brought into contact with the horizontally installed overboard i, i, respectively.
It is used to prevent landslides from collapsing. In use, this operating device connects the hose k from the pump to the coupler j provided on the proximal end of the cylinder a.
After injecting pressure fluid with a pump to tension the cylinder a and piston rod b and retaining the earth in the excavated groove e, the coupler attachment/detachment part is provided with a U-shaped groove for the operating rod l as shown in Fig. 16. Remove hose k using m and set the support (see Figure 17). Also,
After use, push the coupler j with the pressure release part n of the operating rod l to release it, and while a part of the pressure fluid in the cylinder a is extracted and contracted, connect the handle hook o of the operating rod l to the support. It was removed by hooking it onto the handle p (see Figure 18).

[Problems to be solved by the invention] However, in this type of conventional device, the coupler attachment/detachment part m, the pressure release part n, and the handle hook part o provided on the work rod l are formed separately. Furthermore, since each operation of removing the hose k, discharging the pressure fluid, and lifting the support must be performed separately, there is a problem that the work is complicated. In addition, the conventional operating device extends the support after use to move the pressing plates c and d over the stomach i,
Since only pressing is applied to i, the engagement between the pressing plates c and d and the overboard i and i cannot be said to be reliable, and there is a risk that the engagement may be inadvertently released. I couldn't say that.

Therefore, in order to eliminate the above-mentioned drawbacks, a support for retaining earthworks having a belly stopper 72 as shown in FIG. 19 has been developed. This earth retaining support is made of a belly plate 70 with a square hole 79 drilled in it.
A support connection shaft 71 is provided protruding from the side surface of the body, and a main body fixing shaft 78 of a round pipe is fixed to the bent corner, and a suspension ring 75 is fixed to the belly stopper 72.
The other end is pivotally connected to the round pipe by a belly stopper bearing shaft 73, and a belly tightening plate 82 at the lower end of the belly tightening plate 76 is fixed by a fastening portion 81 and attached to the mandrel 80. , Tightening bearing shaft 7 for round pipes
7, and furthermore, the body fixing main shafts 78, 78 are installed with the belly-over stopper 72 on the belly-over stopper plate 70 and the belly-over tightening plate 76 stacked thereon.
are set at both ends, and with the belly-over-stop retaining shaft 73 in the center, the belly-over-over retainer tightening bearing shafts 77, 77 are sandwiched between them, and are penetrated by the mandrel 74, and both ends are stopped (Utility Model Publication No. 61-135945) reference).

However, in this type of device, since the over-the-belly stopper 72 engages with the upper and side surfaces of the over-the-belly side, reliable fixation can be achieved, but since there are many constituent members and the structure is complicated, installation and There is a problem that the removal operation is complicated.

Therefore, there is currently a need for the development of an operating device that allows for easy installation and removal of earth retaining supports.

[Means for solving the problem] This invention was devised in view of the above-mentioned circumstances, and in order to solve the above-mentioned problem, it is possible to ensure the engagement of the retaining support across the belly, and also to improve this engagement. An object of the present invention is to provide an operating device for an earth retaining support, which is characterized in that the earth retaining support can be contracted when the earth retaining support is extended and removed, and the engagement between the pressing plate and the belly can be released at the same time. be.

That is, in this invention, a pressure plate is pivotally attached to both end bases of a cylinder and a piston rod that are fitted to each other so as to be able to expand and contract, and a pressure fluid is injected through a coupler provided at the head of the cylinder. An earth retaining support for preventing earth and sand from collapsing on the side walls of the excavation trench by expanding under pressure so that both of the pressing plates are engaged with the double-side uprights installed horizontally on the opposing side walls of the excavation trench. and an operation rod that controls the removal of a pressure fluid supply hose connected to the coupler of the support, the discharge of the pressure fluid, and the lifting of the support. It has upper and lower horizontal locking bodies that protrude to the outer surface of the plate and engage with the upper and lower surfaces beyond the belly, and has a movable locking body that removably engages with the upper and side surfaces of the belly, The operating rod includes a pressure relief part that comes into contact with the coupler, a first pressing protrusion that projects from the pressure relief part and comes into contact with the inner surface of the pressing plate, and a part of the movable locking body. and a second pressing protrusion that comes into contact with a movable operating part that controls engagement and disengagement with the over-the-belly portion, and a third pressing protrusion that comes into contact with the over-the-belly side. The aim is to provide equipment.

In this invention, the upper and lower horizontal locking bodies may be fixed to the pressing plate as long as they engage the upper and lower surfaces across the abdomen, or they may be fixed to the pressing plate in the vertical direction with respect to the pressing plate. It may be protrudingly provided so as to be movable and adjustable. In addition, the movable locking body engages with the upper surface and side surface of the tummy tuck during use to strengthen the engagement between the tummy tuck and the support, and is disengaged from the tummy tuck when removed. Although it may be of any type, it is preferable to use two movable locking bodies pivotably mounted on both sides of the pressing plate so as to be rotatable in the vertical direction.

[Effect] The above technical means works as follows.

In use, when a retaining support is placed horizontally in an excavated trench and pressure fluid is supplied into the cylinder, the cylinder and piston rod expand and the upper and lower horizontal locking bodies engage with the upper and lower surfaces of the piston rod, respectively. The movable locking body moves on the upper surface of the abdomen and when the press plate comes into contact with the inner surface of the belly, it automatically engages with the outer surface of the belly and supports the opposing belly. It is held at In addition, when removing the support, the pressure release part is brought into contact with the coupler, and the first pressing projection is brought into contact with the inner surface of the pressing plate, and the first pressing projection is brought into contact with the inner surface of the pressing plate.
By tilting the operating rod toward the center of the support using the abutting part between the pressing protrusion and the pressing plate as a fulcrum, the pressure fluid inside the support is discharged, and at the same time, the pressing plate and the cylinder head of the support are pivoted. The second pressing protrusion of the operating rod abuts the movable operating part of the movable locking body, and the third pressing protrusion abuts the inner side surface across the abdomen. hand,
The support can be removed by disengaging the movable locking body from the over-the-belly part.

[Example] An example of this invention will be described below based on the drawings.

◎ First Embodiment Figure 1 is a sectional view of a retaining support in the first embodiment of the operating device of this invention, and Figures 2 and 3 are a plan view and a side view of Figure 1. .

This earth retaining support 1 consists of a cylinder 10 and a piston rod 12 that fit into each other so as to be able to expand and contract.
A cylinder head 16 is provided at the base end of the cylinder 10 and the base end of the piston rod 12, respectively.
The main part is constituted by a pair of press plates 14, 14 attached via a head 18.

The piston rod 12 is formed into a tubular shape, and a piston 13 is attached to the tip.
is slidably fitted into the inner peripheral surface of the cylinder 10. In this case, the piston rod 12 is surrounded by an outer pipe 19 disposed coaxially with the piston rod 12. On the other hand, a dust bush 19a is fixed at the tip of the cylinder 10 for slidingly contacting the outer circumferential surface of the piston rod 12 and the inner circumferential surface of the outer pipe 19 to remove dirt and the like adhering to these surfaces.

The cylinder head 16 fixed to the base end of the cylinder 10 is used for supplying and extracting pressure fluid into the cylinder 10 on the upper side surface of a head body 16a which is connected to the base end of the cylinder 10 by screw connection. A coupler 28 having a check valve is mounted upward, and a pair of inverted L-shaped protection arms 29 are horizontally protruded from both sides of the coupler 28. When supplying pressure fluid to the coupler 28, the pressure fluid is supplied into the cylinder 10 by connecting a hose (not shown) connected to a pump (not shown) to the coupler 28 and driving the pump. As a result, the cylinder 10 and the piston rod 12 are extended relative to each other, and the distance between both side walls of the excavated groove is maintained. When not in use, a check valve of the coupler 28 is opened by an operating rod 2, which will be described later, so that an appropriate amount of pressure fluid can be discharged and the cylinder 10 and piston rod 12 can be contracted.

The pressing plate 14 is rotatably supported by a cylinder head 16 and a head 18, which are fixed to the base end portions of the cylinder 10 and piston rod 12, with pivots 15, 15. This pressing plate 14
is formed of an aluminum casting having projecting parts 14b extending in the same direction from both side edges and the lower edge of a substantially rectangular pressing plate base 14a, and has a pin 38 at its upper end to rotate in the vertical direction. The locking ring 3 is connected by a U-shaped wire rope 32 that can be restored to its original position via a coupler protection plate 36 that is pivotally connected.
0 is attached. In addition, the other pressing plate 14
A locking ring 30 is attached to both sides of the upper end by a U-shaped wire rope 32 that can be restored and deformed. Note that the wire rope 32 is covered with a vinyl tube 34 for protection.

Further, the pressing plate base 14 of the pressing plates 14, 14
An upper horizontal locking body 20 that can engage with the upper surface of the belly riser and a lower horizontal locking body 24 that can engage with the lower surface of the belly riser and support the belly riser are protrudingly provided on the pressing side surfaces of a and 14a. There is. In this case, the upper horizontal locking body 20 has a locking surface 20a that abuts and engages with the upper surface across the abdomen, and the upper surface on both sides of the locking surface 20a and the base 14 of the pressing plate 14.
It is composed of ribs 20b, 20b that extend over a length of 20 cm, and is movably locked on both sides of the press plate 14 and the upper horizontal locking body 20 with a pivot pin 22 that passes through both ribs 20b, 20b. The bodies 26, 26 are pivotably mounted for vertical rotation. This movable locking body 26, which is rotatably pivoted in the vertical direction and removably engages with the upper surface and outer side surface of the abdomen, includes a base 26a that engages with the upper surface of the abdomen and a base 26a.
a stopper portion 26b that is bent downward at a right angle from the outer end of the stopper portion 26b and engages with the outer side surface over the abdomen;
A movable operating portion 26c is bent downward from the other end of the base portion 26a to control engagement and disengagement with the abdomen.
The pivot pin 22 is fitted into a cylindrical pin receiver 26d fixed to the upper surface of the base 26a.

The earth retaining support 1 configured as described above is the fourth
As shown in the figure, after being horizontally suspended between the opposing sides 60 and 60, it is extended by supplying pressure fluid from the coupler 28, and the upper and lower horizontal locking bodies 2
0 and 24 are engaged with the upper and lower surfaces of the transverse 60, and the movable locking bodies 26 and 26 are engaged with the upper and outer side surfaces of the transverse 60, and both pressing plates 14 and 14
presses and holds the over-the-belly portions 60, 60 (see FIGS. 1, 2, and 5). When it is to be removed, the pressure fluid in the support 1 is released and the engagement with the overboard 60 is released using the operating rod 2, which will be described later, and the support is removed from the excavated groove.

As shown in FIGS. 9 to 12, the operating rod 2 is attached to the hose attachment portion of the coupler 28 at the end of a pipe-shaped rod body 50 that is bent into a loose dogleg shape overall. Fork part 52 for removing the matching hose
An L-shaped pressure relief part 51 for discharging pressure fluid.
is formed, and a first pressing protrusion 53 that can come into contact with the inner surface of the pressing plate 14 is provided at the tip end of the pressure relief part 51 . Also. A forked pressing operation part 55 is fixed to the horizontal part of the pressure relief part 51 by fixing means such as welding, and is formed so as to straddle the pressure relief part 51.
Second pressing protrusions 56 that can come into contact with the movable operation part 26c of the movable locking body 26 are provided on both sides of the movable locking body 26, respectively.
A third pressing protrusion 57 that can come into contact with the inner side surface of the over-the-belt 60 is provided in a protruding manner.

In addition, if a hook 58 as shown in imaginary lines in FIG. 11 is protruded from an appropriate position on the rod main body 50 of the operating rod 2, the locking ring 30 attached to the pressing plate 14 of the earth retaining support 1 can be secured. Convenient when lifting or hanging.

To attach the retaining support 1 using the operating rod 2 of this invention configured as described above,
With a locking ring 30 erected from the pressing plate 14,
Alternatively, the earth retaining support 1 is disposed via the upper horizontal locking bodies 20, 20 between the overhangs 60, 60, which are suspended by ropes and horizontally suspended from the sheet piles driven over almost the entire surface of both side walls of the excavation trench. Set up At this time, the lower horizontal locking body 24 does not engage with the belly 60, and
The stopper portion 26b of the movable locking body 26 extends over the abdomen 60
(See Figure 4). and,
When the pump is driven after connecting the high-pressure hose connected to the pump to the coupler 28, pressurized fluid is supplied into the cylinder 10, so that the cylinder 10 and the piston rod 12 are extended relative to each other, and the lower horizontal locking body 24 is moved. While engaging with the lower surface of the belly 60,
The stopper portion 26b of the movable locking body 26 extends over the abdomen 60
while moving on the upper surface of the body and engaging with the side surface of the belly 60,
Then, both pressing plates 14, 16 are placed over the stomach 60, 60
The space between the ribs is maintained, and the collapse of earth and sand on both side walls 41 is prevented (see FIGS. 1, 2, and 5). Finally, the forked part 52 of the pressure relief part 51 of the operating rod 2 is engaged with the coupler part of the hose, and the forked part 52 engaged with the hose is
moves away from the coupler 28 and removes the hose.

Next, in order to remove the earth retaining support 1, as shown in FIGS. 6 to 8, the pressure release part 51 is brought into contact with the coupler 28, and the first pressing protrusion 5
3 is brought into contact with the inner surface of the pressing plate 14, and the second
The pressing protrusion 56 is brought into contact with the movable operation portion 26c of the movable locking body 26. In this state, when the operating rod 2 is tilted in the direction of the arrow in FIG. At the same time as the first pressing projection 53 separates the cylinder head 16 and the pressing plate 14 about the pivot 15, the second pressing projection 56
presses the movable operation part 26c of the movable locking body 26, and the stopper part 26b of the movable locking body 26 moves over the belly 60.
At the same time, the third pressing protrusion 57 comes into contact with the inner side surface of the tummy tuck 60, and the support 1 is separated from the tummy tuck 60. Therefore, a gap necessary for removal is secured between the excavated groove and the support 1, so that the support 1 can be pulled up using the operating rod 2.

◎ Second Embodiment Figures 13 and 14 show a side view and a sectional view of the earth retaining support showing the second embodiment of this invention. This is the case where it is possible to That is,
The press plate 14 is provided with a long hole 40 extending in the vertical direction and parallel guide grooves 42, 42 on both sides of the long hole 40 into which projecting pieces (not shown) of the press plate 14 are fitted. An upper horizontal locking body 20 that engages with the upper surface of the overboard 60 by a bolt 44 passing through it and a nut 44 screwed to the bolt 44.
This is a case where the press plate 14 is attached to the press plate 14 so as to be vertically adjustable. In this case, the lower horizontal locking body 24 is fixed to the pressing plate 14;
4 can also be attached to the press plate 14 so that its position can be adjusted similarly to the upper horizontal locking body 20.

[Effects of the invention] As explained above, according to the earth retaining support operating device of this invention, the earth retaining support has an upper part that protrudes outward from the pressing plate and engages with the upper and lower surfaces of the pressing plate. The operating rod has a lower horizontal locking body and a movable locking body that removably engages with the upper and side surfaces of the abdomen, and the operating rod has a hose removal fork that can be engaged with the coupler. a first pressing protrusion that protrudes from the pressure relief part and comes into contact with the inner surface of the pressing plate; and a second pressing projection and belly that comes into contact with the movable operation part of the movable locking body. Since it has the third pressing protrusion that comes into contact with the other side, the following effects can be obtained.

1. When preparing for use, extend the retaining support and
This support can be locked continuously and automatically over the belly, and when removed after use, the pressure fluid of the earth retaining support can be released and removed at the same time, reducing work processes and labor. I can figure it out.

2. During use, the movable locking body engages firmly across the belly, so there is no risk of the earth retaining support falling off inadvertently, and safety can be ensured.

3. The structure is simpler than conventional devices of this type, making it easier to handle.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the support in the first embodiment of the earth retaining support operating device of this invention, Figs. 2 and 3 are respectively a plan view and a side view of Fig. 1, and Figs. 4 and 5. The figure is a side view of the main part showing the state in which the support is attached in this invention, and FIG. 6 is a side view of the main part showing the state before the start of removing the support.
Fig. 7 is a sectional view of the main part showing the state of engagement between the operating rod and the support when the support is removed, Fig. 8 is a side view of the main part showing the state of hose removal, and Fig. 9 is the main part of the operating rod in this invention. Front view, Figure 10 and Figure 1
Figure 1 is the rear view and side view of Figure 9, respectively.
2 is a sectional view of FIG. 9, and FIG. 13 is a side view of the support in the second embodiment of this invention.
Fig. 14 is a side view thereof, Fig. 15 is a sectional view showing how the conventional earth retaining support is used, Fig. 16 is a side view showing the conventional operating rod, and Figs. 17 and 18 are conventional earth retaining supports. FIG. 19 is a schematic cross-sectional view showing the operating state of the support operating device, and FIG. 19 is a perspective view of main parts showing another conventional support. Explanation of symbols, 1...Earth retaining support, 2...Operation rod, 10...Cylinder, 12...Piston rod, 14...Press plate, 15...Pivot, 16...Cylinder head, 20...Upper horizontal locking Body, 24...
...Lower horizontal locking body, 26...Movable locking body, 26a
...Base, 26b...Stopper part, 26c...Movable operation part, 26b...Pin receiver, 28...Coupler, 50...Stand body, 51...Pressure relief part, 52...
...Forked portion, 53... First pressing protrusion, 55...
Forked pressing operation part, 56... second pressing projection,
57...Third pressing protrusion.

Claims (1)

[Scope of utility model registration request] A pressing plate is pivotally attached to the bases of both ends of the cylinder and the piston rod, which are fitted to each other so as to be able to expand and contract, and the piston rod expands when pressurized by pressurized fluid injected through a coupler provided at the head of the cylinder. Accordingly, the above-mentioned pressing plates are connected to an earth retaining support that prevents the collapse of earth and sand on the side walls of the excavated groove, which are engaged with double-sided uprights installed horizontally on the opposite side walls of the excavated groove, and a coupler of the above-mentioned supports. In the earth retaining support operating device comprising an operating rod for removing a connected pressure fluid supply hose, discharging the pressure fluid, and lifting the support, the earth retaining support protrudes outward from the pressing plate. It has an upper and a lower horizontal locking body that engages with the upper and lower surfaces over the belly, and a movable locking body that removably engages with the upper and side surfaces of the belly, and the operating rod is connected to the coupler. a first pressure relief portion that abuts on the pressure relief portion; and a first pressure relief portion that protrudes from the pressure relief portion and abuts on the inner surface of the pressure plate.
a second pressing protrusion that abuts on a movable operating portion that constitutes a part of the movable locking body and controls engagement and disengagement with the over-the-belly portion; and a third pressing portion that abuts on the over-the-belly side. An operating device for an earth retaining support, characterized in that it has a projection for use.