JPH0959986A - Swing type fixing device - Google Patents

Abstract

(57) [Abstract] (Correction) [Problem] To provide a swing-type fixing for fixing a pipe, which is inexpensive, improves work efficiency, saves labor, and realizes worker safety in burying a pipe. . SOLUTION: In a swing-type cutting beam of a soil retaining support constructed by a pair of abdominal rises 5 and a cutting beam 4, a side that pivots with respect to one end of the cutting beam 4 and an axial line of the cutting beam. The rotary shaft 1 is offset to the action point, the action point 17 is composed of the eyebolt 2 provided at an arbitrary position on the other end side of the cut beam, and the direction in which the cut beam is rotated is opposite to the rotary shaft. In the direction, a fixed point 18 composed of an eyebolt 2 provided at an arbitrary position farther from the center of the rotary shaft 1 when viewed from the point of action, and a spring 3 for hooking and pulling on each eyebolt 2 between the point of action and the fixed point. To provide. In this way, when the force of the spring 3 acts, the cut-off beam 4 abuts and abuts against the abdomen 5, and thus the gas pipe or the like can be easily carried into the excavation groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing-type fixing device.

[0002]

2. Description of the Related Art In particular, in the burial work of gas pipes, etc., earth retaining supports are provided in excavation trenches, and usually two burrs are laid horizontally between a pair of 4 m uprising. There is.

On the other hand, a steel pipe gas pipe to be buried is usually
What has a length of 0 to 12 m and is welded by two or three welds on the ground is carried into the excavation floor from the ground.

Conventionally, the gas pipe having a maximum length of about 36 m is horizontally hung by a crane or a chain block and lowered to the excavation bed in this horizontal state, so that the existing cut-out does not hit the gas pipe. Or remove one of the cutouts or join one end of the cutout with the abdomen,
There is a method of using a swing-type cut beam that turns the other end, but in this swing-type cut beam construction method, until the gas pipe passes from the upper position to the lower position where the cut beam is installed horizontally, It was necessary to fix the swiveled beam with a rope or to fix it by using a fixing metal fitting as shown in FIG. 4 so that the beam would not return freely.

In the method shown in FIG. 4, a space is provided in which the gas pipe can be easily lowered to the excavation bed in a horizontal state in which the gas pipe is lifted by a crane or a chain block. Although a work for raising and fixing is required, this is a troublesome work that requires both a work for fixing and a work for releasing, and the work may be hindered because the fixing metal fitting protrudes from the excavation surface.

[0006] As another method, there is a method in which an operator directly fixes it by using his hand or pulling it with a rope.

[0007] In this method, until the gas pipe passes from above to below the horizontal position where the notch is provided horizontally,
It requires a lot of manpower, and these workers usually take sufficient safety measures, such as collapsing the edges of the digging trench and dropping gas pipes suspended in the air by cranes or chain blocks. Nevertheless, they must be forced to work close to the site where they are exposed to such dangerous situations, which cannot be guaranteed that no accidents will occur.

[0008]

SUMMARY OF THE INVENTION The present invention seeks to eliminate the above-mentioned drawbacks and improve the efficiency and safety of work.

[0009]

SUMMARY OF THE INVENTION A swing-type fixing device according to the present invention is a soil retaining support comprising a pair of prongs and a cut-out, and one end of the cut-out is directly or indirectly protruded. The following means are taken in order to release and fix the cut-off plate at the set position in the swing-type cut plate which is connected to the hand and the other end pivots up and down or left and right. That is, at one end of the notch, and with respect to the axis of the notch, a rotating shaft that is offset to the revolving side, an action point provided at an arbitrary position on the other end of the notch, and rotation. Any position in the direction opposite to the direction in which the notch turns with respect to the axis, and in the direction opposite to the other end of the notch with respect to the rotation axis, any position farther from the center of the rotation axis as viewed from the point of action. , And the action point and the fixed point are pulled together by a spring.

[0010]

According to the present invention, when the gas pipe or the like is lowered on the excavation bed, the swing-type cutting fixture is slightly contracted, and then the other end is released from the belly. If it is turned by a hooking tool or the like in the direction in which it comes into contact in parallel with the rising, the force of the spring is balanced at the position where the points of action are arranged on an extension line connecting the fixed point and the rotation axis with a straight line. If left without applying force, the cutting edge will come to rest. And even slightly pass through this equilibrium position,
If a force is further applied to the cutting edge, the force of the spring acts upon passing the equilibrium point, and the cutting edge continues turning and abuts against the belly and is fixed even when no force such as human power is applied anymore. . Conversely, from this equilibrium position, if the cut is passed in a direction perpendicular to the bulging, the force of the spring will work when passing the equilibrium position, no longer applying force such as human power, The cutting edge keeps turning and abuts at right angles to the belly to fix.

【Example】

The apparatus for fixing a swing-type notch according to the present invention will be described below with reference to FIGS. 1 and 2, but the present invention is, of course, limited to the specific structure of the present embodiment. is not.

As shown in the installation plan view of FIG. 1, a swing-type cut-beam fixing device according to an embodiment of the present invention comprises a pair of uprising members 5 and a soil-cylinder retaining member 4 having a hydraulic cylinder structure. In the construction, one end of the cutout 4 is connected to the bulge 5 via the connection guide 7, and the other end is a swing-type cutout that turns to the left. A pin hole is formed at the left end of the connection guide 6. The bracket 7 is provided, and the rotary shaft 1 is provided at a position where the pin hole of the bracket 7 and the pin hole 9 of the cylinder pad 8 are overlapped with each other, and the rotary shaft 1 is provided on the other end side on the center line of the cut beam 4. , The point of action 17 is provided by the eyebolt 2, and further at the center position of the connecting guide 7,
A fixing point 18 is provided by the eyebolt 2. A spring 3 for pulling the eyebolts 2 forming the working point 17 and the fixed point 18 is provided.

Prior to this work, first, a shoring support is carried out by a known method.

In burying gas pipes and the like according to the present invention, the excavation trench is deep and a large earth pressure is applied to the earth wall.
Usually, two steps of earth support are applied.

Therefore, as shown in FIG.
In order to lower 2 from the position A to the position B, drain the water from the cut beam 4 of the upper hydraulic cylinder structure and reduce the cut beam 4 to release the other end, The work rod 11 is used to hook the eyebolt 2 which constitutes the point of action 17 in parallel to the abdomen 5 in the abutting direction and turn to the left. When the point of action 17 passes on the extension line connecting and with a straight line, the force of the spring 3 acts, and even if the force due to human power is no longer applied, the cutting beam 4 continues to turn voluntarily and agitates. Abut 5 and fix.

Normally, two notches 4 are provided between 4 m, but the gas pipe 12 is usually 12 m in length, and two or three of these gas pipes are welded on the ground, and are vertically crane-mounted from the ground. The above work is repeated with a maximum of 18 cuts 4 because the hoist is lifted by the chain block 13 or the like and lowered horizontally on the excavation floor.

By the above operation, the upper cut 4 is
Since all are temporarily removed, a sufficient space for descending can be secured while the gas pipe 12 is kept horizontal.

Accordingly, the gas pipe 12 is lifted by the crane or the chain block 13 or the like, and is easily lowered to the position B in FIG.

When the gas pipe 12 is carried into the position B, the working rod is used to return the cut-out 4 which has just contacted the upset 5 to the original abutment 5 at a right angle. When the upper cutting edge 4 is protruded by 11 and turned in a direction perpendicular to 5, the force of the spring 3 is applied when the action point 17 passes on an extension line connecting the rotation axis 1 and the fixed point 18 in a straight line. Acts,
Even if no more human power is applied, the upper tier 4
Is continuously rotated, and the bottom surface 10 of the cylinder pad of the cutting surface 4 of the hydraulic cylinder structure comes into contact with the side surface of the connecting guide 6 fitted to the protruding portion 5, thereby forming the protruding portion 5. Fix at a right angle. Then, pressurized water is again injected into the cut-out 4 having a hydraulic cylinder structure by a hydraulic pump to bulge and pressurize 5.

Next, in a similar manner, as shown in FIG. 2, in order to lower the gas pipe 12 from the position B to the position C, the water is drained from the cut-out 4 of the lower hydraulic cylinder structure, and the cut-off is performed. 4 is released, the other end is released, and the notch 4 is hooked on the eyebolt 2 constituting the action point 17 using the working rod 11 in a direction parallel to and protruding from the abdomen 5, and As described above, the action point 17 is on the extension line connecting the rotary shaft 1 and the fixed point 18 with a straight line as described above.
However, when passing, the force of the spring 3 acts, and the cutting edge 4 continues to turn spontaneously and abuts on the belly 5 to be fixed, even when no more force is applied by human power or the like.

Normally, two notches 4 are installed between 4 m, but the gas pipe 12 is usually 12 m long, and two or three gas pipes are welded on the ground, and are vertically crane-mounted from the ground. The above operation is repeated with a maximum of 18 cuts 4 because the chain is lifted by the chain block 13 or the like and lowered horizontally on the excavation floor.

By the above operation, the lower cutting edge 5 is
Since all are temporarily removed, a sufficient space for descending can be secured while the gas pipe 12 is kept horizontal.

Therefore, the gas pipe 12 is lifted by the crane or the chain block 13 or the like, and is easily lowered to the position C in FIG.

When the gas pipe 12 is carried into the position C, the work rod is returned to the state in which the cut beam 4 which was previously brought into contact with the bulging 5 is brought into contact with the original bulging 5 at a right angle. When the lower cut beam 4 is raised by 11 and is swung in the direction perpendicular to 5, the force of the spring 3 is generated when the action point 17 passes along the extension line connecting the rotary shaft 1 and the fixed point 18 with a straight line. Acts,
Even if no more human power is applied, the lower cut 4
Is continuously rotated, and the bottom surface 10 of the cylinder pad of the cutting surface 4 of the hydraulic cylinder structure comes into contact with the side surface of the connecting guide 6 fitted to the protruding portion 5, thereby forming the protruding portion 5. Fix at a right angle. Then, pressurized water is again injected into the cut-out 4 having a hydraulic cylinder structure by a hydraulic pump to bulge and pressurize 5.

After the transfer of the gas pipe 12 to the position C is completed by the above-described operation, the gas pipe 1 is moved in a known manner.
2) Backfill the inside of the groove and the inside of the groove, and remove the earth retaining support while rolling.

[0026]

According to the present invention, one end of the cut is directly or indirectly connected to the bulge, and the other end is vertically or indirectly formed by a pair of bulges and cuts. In a swing type swinging plate that turns left and right, the other end of the cutting plate is released, and if the cutting plate is turned by human power or the like in a direction in which the cutting plate contacts in parallel with the abdomen, the same as described in the above embodiment. As described above, the force of the spring connecting the action point and the fixing point provided by the eye bolts respectively acts, and the cut-out portion abuts on the belly and is fixed by one-touch without any complicated procedure.

In the conventional swing-type cutting method, if the other end of the cutting is released, the other end of the cutting becomes
It was completely uncontrolled and could freely move in the space above the digging trench within the turning range of the cutting edge. Therefore, when lowering the gas pipe from the ground to the excavation bed in the laying work of the gas pipe etc., the lowering of the gas pipe until the gas pipe passes from above to below the horizontal position where the notch is laid horizontally. In order not to hinder, it was necessary to fix the turning fin using a fixing bracket or the like so as not to return freely.

In this method, the gas pipe is hung up by a crane or a chain block or the like to provide a space for easily descending on the excavation bed in a horizontal state. It requires a work to fix it,
This is a time-consuming operation that requires both fixing and releasing work, and since the fixing bracket protrudes from the digging surface,
It can hinder your work.

Therefore, according to the present invention, it is possible to improve work efficiency, save labor, and realize worker safety at low cost.

[Brief description of drawings]

FIG. 1 is an installation plan view of the present invention.

FIG. 2 is a front view showing a lowered state of a gas pipe.

FIG. 3 is a plan view of the conventional method and a cross-sectional view of the conventional method (A to FIG. 3).
A ')

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rotating shaft 2 ... Eyebolt 3 ... Spring 4 ... Cutting 5 ... Protrusion 6 ... Connection guide 7 ... Bracket 8 ... Cylinder pad 9 ... Pin hole 10 ... Cylinder pad bottom surface 11 ... Working rod 12 ... Gas pipe 13 ... Chain block 14 ... Fixing bracket 15 ... Expansion screw 16 ... Pile 17

Claims (1)

[Claims] 1. An earth retaining support comprising a pair of prongs and a cut-out, wherein one end of the cut-out is directly or indirectly connected to the protuberance, and the other end pivots up and down or left and right. In a swing-type notch, a rotating shaft that is offset to a turning side at one end of the notch and with respect to an axis of the notch, and provided at an arbitrary position on the other end of the notch. The point of action and any position in the direction opposite to the direction in which the notch rotates with respect to the rotation axis, and the direction of rotation of the rotation axis in the direction opposite to the other end of the notch with respect to the rotation axis. A fixing point provided at an arbitrary position distant from the center of the above, and the action point and the fixing point are pulled together by a spring.