JPH0240094Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention relates to earth retaining equipment, which is used when burying various types of pipes such as water and sewage pipes, gas pipes, oil pipes, and cable storage pipes in the ground. This invention relates to improvements to earth retaining devices that prevent the collapse of ditches.

(Prior Art) Conventionally, various types of pipes are buried underground using various means to prevent the excavated trenches from collapsing. In particular, various large-scale earth retaining devices have been proposed for use in main pipe construction or soft ground, but on the other hand, they cannot be used in narrow spaces, narrow side streets, or within structures such as station premises, where it is difficult to bring in large machines such as cranes. The reality is that earth retaining devices that can be assembled manually, such as those used, are not necessarily satisfactory in terms of assembly work, strength, and other aspects. For example, an earth retaining means that supports a sheet pile such as a steel plate that is supported in contact with both side walls of an excavation trench with jacks through supporting materials called horizontally arranged Since there is a risk of displacement in the vertical direction, the supported sheet piles may become inverted. In addition, the jack proposed in Japanese Utility Model Publication No. 58-45319 as one of the ground pressure bearing jacks for this purpose is structurally complex and cumbersome to operate, so it is usually not used in places with a lot of earth and sand. Considering this, it had to be handled with care. On the other hand, by arranging frames front to back, left, right, top and bottom and combining them, a steel support in the shape of a rectangular parallelepiped is formed, which is suspended in an excavation trench, and the left and right frames abut and support the sheet piles. There is.

(Problem that the invention aims to solve) However, in this case, the frame itself is bulky and inconvenient to handle, and the spacing adjustment corresponding to the width of the excavation groove is difficult to do between the frames that are fitted twice. Because of the locking pin that penetrates the ground, it was difficult to adjust the width when supporting earth pressure.

Therefore, this idea was devised in view of the existing circumstances as described above, and it allows for easy transportation to the site of use and assembly there by human power, so that it can be done in a narrow space. It is an object of the present invention to provide an earth retaining device which is robust enough to withstand earth pressure, is lightweight and easy to handle, and has excellent workability.

(Means for Solving the Problems) In order to achieve the above-mentioned purpose, in this invention, columns are arranged vertically at the four corners of the front, rear, left, and right, and the columns are constructed between the upper and lower portions of each of the columns in the front and rear directions. and a telescopic jack support that is horizontally suspended between the front and rear sides of the uprights in the left and right direction, and is provided on the outer surface of the upper end and the outer surface of the lower end of the support, respectively. An upper connecting piece and a lower connecting piece having pin holes at appropriate intervals are provided in a protruding manner, and connecting pieces with pin holes are provided in corresponding recesses in the front and rear ends of the upright. Gripping arms with pin holes connected to opposing ends of the outer cylinder of the jack support and the inner cylinder that is extendably housed therein are provided, and pin holes are drilled at both ends of the belly raiser corresponding to the grip arms. and are connected to the pin holes of each of the constituent members through fixing pins and pins.

(Embodiments) Hereinafter, embodiments of this invention will be described with reference to the drawings.

The reference numeral 10 shown in the figure is a support column formed of a square pipe, which is arranged in an upright manner at the four corners of the front, back, left, and right, and between the left and right support columns 10, a stand-up 30 is installed at the upper and lower portions thereof. . The support column 10 itself has a length corresponding to the depth of the trench D to be excavated in accordance with the buried position of various pipes P such as water and sewage pipes, gas pipes, oil pipes, and cable storage pipes to be buried in the ground G. It has a certain quality.

The above-mentioned uprights 30 are constructed between the pillars 10.
is formed to have a rectangular cylindrical cross section,
The strut 10 and the riser 30 are fitted together, and a fastening pin 1 penetrates through the fitted portion, and is fixed to the fastening pin 1 to prevent the fastening pin 1 from coming off. They are connected by means of pins consisting of pins 2 (see FIG. 6). Specifically, the pillar 10
An upper connecting piece 11 is provided on the outer surface of the upper end, and a lower connecting piece 13 is provided protrudingly provided on the outer surface of the lower end.
Pin holes 12 and 14 are drilled at equal intervals in each of the pin holes 12 and 14, and an upper connecting piece abuts on the bottom surface, the side surface, and the end surface of the recess 31 cut out at the front and rear ends of the recess 30. 11. A connecting receiving piece 32 having a substantially hat-shaped cross section that fits externally on the lower connecting piece 13 is fixed to the front and rear ends of the raised rib 30, and the raised connecting piece 32 is fixed to the front and rear ends of the raised rib 30.
Pin holes 33 are bored at the same intervals as the intervals between the pin holes 12 and 14 on both sides of the pin holes 12 and 14 that protrude in the vertical direction at the front and rear ends of the pin holes 14. By doing this, there is an advantage that the robustness of the front and rear ends of the belly riser 30 can be increased by the connecting piece 32, and as shown in the figure, the lower connecting piece 13 has three or more pins. By drilling the hole 14, it is also possible to adjust the vertical height position of the belly riser 30 installed below.

Reference numeral 15 denotes a column base, which is formed of each pipe like the column 10, has a plurality of equally spaced pin holes 16, and is fixed to the lower end of the column 10. A reinforcing frame 17 with a U-shaped cross section A pin hole 18 is also bored in the hole. As shown in FIG. 4, by fitting and connecting this support 15 to the lower end of the support 10 via the pin means 1 and 2, the overall height can be increased, and even if there is a deep groove D, Corresponding adjustments are possible.

Further, reference numeral 19 denotes a bracket fixed to the column base 15 in order to connect the riser 30 to the column base 15, and a gripping piece 20 having a U-shaped cross section and fitted onto the column base 15.
The gripping piece 20 has a pin hole 21 that matches the pin hole 16 of the column base 15, and the connecting piece 22 has a pin hole 23 that matches the pin hole 33 of the upright 30. are respectively drilled therein, and the pin means 1,
2 and are fitted and connected to each other (see FIG. 7).

Reference numeral 25 denotes a hanging means for suspending this device with a set of grooves and carrying it into the groove D or carrying it out of the groove D. As shown in FIG.
A pin hole 27 is bored in the reinforcing frame 26, which has a U-shaped cross section and is fixed to the upper end of the column 10. A wire 29 is connected to the tool 28 to engage a crane hook (not shown) via a ring.

And, between the belly risers 30 installed between the pillars 10 along the front and back direction, a jack support 40 that can be freely expanded and contracted is stretched horizontally at the front and rear sides in the left and right direction. This jacket support 4
0 supports a sheet pile W made of wood or steel that is arranged in a standing leg shape on the outside of the upright 30 in order to support the earth pressure received from both side walls in the trench D, and the upright 30 is directly connected to the upright 30. Support this by combining. As shown in FIG. 3, the jack support 40 has a feed screw rod 43 inserted and fixed into an outer cylinder 41 whose one end is closed by a closure piece 42, and one end of the feed screw rod 43 protruding from the closure piece 42. In addition, a feed nut 52 connects a gripping arm 47 having a U-shaped cross section and fits externally to the riser 30, and is screwed to the feed threaded rod 43.
An inner cylinder 51 with a
At the other end of the inner cylinder 51 that goes out from the outer cylinder 41, there is a bulge 3.
It is composed of a gripping arm 54 having a U-shaped cross section that is fitted onto the outside of the nut, and when either the outer cylinder 41 or the inner cylinder 51 is rotated, the screw feeding action of the feed screw rod 43 and the feed nut 52 is activated. Therefore, the inner cylinder 51 protrudes and retracts from the outer cylinder 41, so that the overall length can be freely adjusted. In addition, 44 is the feed screw rod 43
This is a detachment prevention portion formed at the end, and prevents the inner tube 51 from detaching when it comes out from the outer tube 41 due to the screw feeding action.

In the illustration, one of the gripping arms, for example, the outer cylinder 4, is used to enable expansion and contraction adjustment of the overall length even when the left and right belly risers 30 are horizontally fixed between each other.
The gripping arm 47 connected to 1 is rotatable,
Specifically, a connecting ring 45 is attached to the feed screw rod 43 by a plate 46 fixed to the rear surface of the deep bottom of the gripping arm 47, which fits onto one end of the feed screw rod 43, and abuts against the surface of the plate 46 to prevent it from coming off. By fixing it to one end, the gripping arm 47 can freely rotate.

Furthermore, the grip arm 54 connected to the inner cylinder 51 is connected to the inner cylinder 51.
For example, as shown in the figure, the inner cylinder 51, the connecting cylinder 5
3. They are connected by pin means 1 and 2 that penetrate through both. Then, as shown in FIG. 8, a long cylindrical manhole support 56 is attached to the manhole support 5.
6 is connected to the inner cylinder 51 via pin means 1 and 2 by a stepped portion 57 formed on itself, and further connected to the connecting cylinder 53.
By combining the two, it is possible to widen the distance between the uprights 30 in the left and right direction, which has the advantage of being able to be used, for example, to support earth pressure at a large-diameter manhole construction site.

In order to ensure reliability, the gripping arms 47, 54 and the belly riser 30 are connected by pin means 1, 2, and the gripping arms 47, 54 are connected to the belly riser 30 at the position where they fit externally. Pin holes 48 and 55 are formed in the gripping arms 47 and 54 to match, and a pin hole 34 is formed in the riser 30, and if necessary, these can be replaced with bolts or nuts.

Reference numeral 49 denotes a cap fixed to the other end of the outer cylinder 41. By slidingly inserting the inner cylinder 51 into the inner peripheral edge of the cap 49, it is possible to prevent dirt and other objects from entering the outer cylinder 41. The screw feeding action should be smooth in order to prevent dirt from adhering to the screw. Then, by rotating the cap 49 and furthermore the outer cylinder 41 using the jack handle 60 which has an operation pin 61 that engages with an operation hole 50 formed in the cap 49, the outer cylinder 41 and the inner cylinder 51 are connected to each other. This allows for relative movement of the parts, making the expansion and contraction work easier.

Incidentally, in order to reduce the overall weight, the support column 10, the stand-up 30, the jack support 40, and others may be made of aluminum.

This invention is constructed as described above, and when used, the members are assembled by fitting and connecting each member in the arrangement shown in FIG. 2. That is, struts 10 are erected at the four corners of the front, rear, left, and right, and braces 30 are erected in the front-rear direction and connected by pin means 1 and 2, and in the left-right direction, a jack support 40 is horizontally suspended and a grip arm 47 is installed. , 54, are connected by pin means 1 and 2, and if the groove D is deep, the column base 15 is connected to the lower end of the column 10 to increase the overall height. For wide areas, manhole support 5
6 to the jack support 40 to increase the overall width. Then, the entire structure is suspended by a crane or other device via the hanging means 25 connected to the upper end of the support column 10, and after being moved and placed in the groove D at a predetermined location, the space between the upright 30 and the wall of the groove D is Insert the sheet pile W into the groove D.
It is supported in contact with the wall surface, and at this time, the jack support 40 is extended if necessary.

(Effect of the invention) Therefore, when placing the jack support 40 in the groove D excavated in the ground G, it can be easily assembled manually on site, and adjustment corresponding to the width of the groove D can be done manually. This can be dealt with by stretching, and even if the upright 30 is receiving earth pressure via the sheet pile W, stretching work to widen it again can be easily performed.

In particular, the pillars 10 are arranged vertically in the front, back, left, and right.
The connecting portion of a plurality of braces 30 installed between the braces 30 in the front-rear direction with the struts 10, and the braces in the jack support 40 horizontally suspended between the braces 30 in the left-right direction. Each of the horizontal connection parts with 30 has a fitting structure and is connected by pin means 1 and 2, so it is not only easy to assemble, but also each member 10, 30, 4
0 can be carried in disassembled, making it suitable for use in narrow spaces, and being lightweight, workers can easily assemble it manually even in dusty sites. .

Since the jack supports 40 installed between the uprights 30 are expandable and contractible, they can be adjusted according to the width of the groove D to be excavated, and firmly support the earth pressure through the sheet piles W. According to the results of actual use, the compressive strength was 11 tons.

In addition, since it has sufficient strength, it is possible to safely and quickly bury various pipes P such as water and sewage pipes, gas pipes, oil pipes, and cable storage pipes. This has extremely useful effects in practice, such as being able to be disassembled into parts and stored compactly.

Further, an upper connecting piece 11 and a lower connecting piece 13 having pin holes 12 and 14 at appropriate intervals are provided protrudingly on the outer surface of the upper end and the outer side of the lower end of the column 10, and the corresponding front and rear ends of the raised sides 30 are provided with pin holes 12 and 14 at appropriate intervals. Missing recess 3
1 is provided with a connecting piece 32 with a pin hole 33, and on the other hand,
Gripping arms 47 and 54 with pin holes 48 and 55 connected to opposite ends of the outer cylinder 41 of the jack support 40 and the inner cylinder 51 that is telescopically housed therein are provided, and a corresponding belly riser is provided. Pin holes 34 are drilled at both ends of 30, and the pin holes 12, 14, 33, 34, 48, 55 of each component member 10, 30, 40 are connected to each other via fixing pins 1 and 2. The connection between the support column 10 and the stand-up 30 and the connection between the stand-up 30 and the jack support 40 can be made easier and more reliable.

[Brief explanation of the drawing]

Figure 1 is a schematic explanatory diagram in use, Figure 2 is an exploded perspective view, Figure 3 is a sectional view of the jack support,
Fig. 4 is a sectional view showing the connection between the column and the column base, Fig. 5 is a sectional view showing the connection between the hanging tool and the column in the hanging means when suspending the entire device, and Fig. 6. FIG. 7 is a cross-sectional view showing the connection between the pillar and the riser, and FIG. 7 is a cross-sectional view showing the connection between the column base and the riser via the bracket.
FIG. 8 is a partially omitted sectional view showing a state of connection with a manhole support connected to a jack support. G...Ground, P...Pipe, D...Groove, W...Sheet pile, 1...Fixing pin, 2...Pinning, 10...
Post, 11... Upper connecting piece, 12... Pin hole, 1
3... Lower connecting piece, 14... Pin hole, 15... Pillar base, 16... Pin hole, 17... Reinforcement frame, 18...
Pin hole, 19...Bracket, 20...Gripping piece,
21... Pin hole, 22... Connection piece, 23... Pin hole, 25... Hanging means, 26... Reinforcement frame, 2
7... Pin hole, 28... Hanging tool, 29... Wire, 30... Ribbon, 31... Recess, 32... Connection receiving piece, 33... Pin hole, 34... Pin hole, 40
... Jacket support, 41 ... Outer cylinder, 42 ...
Closure piece, 43... Feed screw rod, 44... Removal prevention part, 45... Connecting ring, 46... Plate, 4
7...Gripping arm, 48...Pin hole, 49...Cap, 50...Operation hole, 51...Inner cylinder, 52...Feeding nut, 53...Connecting cylinder, 54...Gripping arm, 5
5... Pin hole, 56... Manhole support, 5
7... Stepped portion, 60... Jacket handle, 61...
...Operation pin.

Claims (1)

[Scope of utility model registration request] Supports placed vertically at the four corners of the front, back, left, and right,
It comprises a plurality of uprights installed between the upper and lower parts of each of the support columns in the front and back direction, and a telescopic jack support that is installed horizontally between the front and rear sides of the uprights in the left and right direction, and An upper connecting piece and a lower connecting piece having pin holes at appropriate intervals are provided protrudingly on the outer surface of the upper end and the outer side of the lower end of the strut, respectively, and pins are inserted into corresponding recesses formed in the front and rear ends of the upright. A connecting piece with a hole is provided, and a gripping arm with a pin hole is provided which is connected to opposite ends of the outer cylinder of the jack support and the inner cylinder that is telescopically housed therein, and the corresponding grip arm is provided with a pin hole. 1. An earth retaining device, characterized in that pin holes are bored at both ends of the upright, and the earth retaining device is connected to the pin holes of each of the constituent members through fixing pins and pins.