JPH11280073A - Cut beam support - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cut beam support capable of performing the expansion and shrinkage operations easily, providing satisfactory work efficiency, shortening work time, and ensuring the required durability. SOLUTION: A cut beam support 11 is provided with an outer pipe 19 and an inner pipe 20 fitted and inserted therein. A female screw member 21 is provided in an inner end part of the inner pipe 20, and a male screw member 25 screw-fitted in the female screw member 21 is provided inside the outer pipe 19. A first bevel gear 26 is attached to an end part of the male screw member 25 and is meshed with a second bevel gear 31 supported in the outer pipe 19. When a handle 28 is turned, the male screw member 25 is turned through a pair of bevel gears 26, 31 so that both pipes 19, 20 can perform the expansion and shrinkage operations.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a girder support using screws and gears, which is used for earth retaining supports.

[0002]

2. Description of the Related Art Generally, a girder support used in this type of earth retaining structure is constructed as shown in FIG. That is, between the pair of pressing plates 90, the outer pipe 91 attached to one pressing plate 90 and the other pressing plate 9
And an inner pipe 92 attached to the inner pipe 92. The operation member 93 has a female screw 94 threaded on the inner peripheral surface thereof, and the inner pipe 92 has a male screw 95 over the entire outer peripheral surface.
Is screwed, and the operation member 93 and the inner pipe 92 are screwed together. In this state, the inner pipe 92 is connected to the outer pipe 91.
The end face of the operation member 93 is in contact with the end face of the outer pipe 91 by being inserted into the inside. The pair of handles 96 are mounted on the outer peripheral surface of the operation member 93. Then, the pair of grips 96 are gripped with both hands, the operation member 93 is rotated, and the end face of the outer pipe 91 is
, The inner pipe 92 becomes the outer pipe 9
The two pipes 91 and 92 can be extended and contracted in the axial direction.

[0003] This cutting beam support is used for sheet piles 9 of earth retaining supports.
7 and both pressing plates 90 are protruded 9
8, the inner pipe 92 withdraws from the outer pipe 91 in this state, and the two pipes 91, 92 are extended, so that the pressing plate 90 bulges and is pressed against the 98. I have. Further, when the earth retaining structure is dismantled, the inner pipe 92 is fitted into the outer pipe 91, whereby the two pipes 91 and 92 are contracted. It can be removed from.

[0004]

However, in this conventional configuration, the operating member 93 is formed to have substantially the same diameter as the outer pipe 91, and is rotated a large number of times while holding the handle 96 a plurality of times for expansion and contraction. There is a need. For this reason, there is a problem that a considerable amount of force is required when the two pipes 91 and 92 are expanded and contracted, the operation for expanding and contracting is troublesome, the working efficiency is low, and the working time is long.

The girder support is used for retaining the earth with the external thread 95 of the inner pipe 92 exposed to the outside. For this reason, there is a problem that it is difficult for the male screw 95 to be inserted or withdrawn due to the attachment of earth and sand to the male screw 95, and the working efficiency is reduced or the durability is reduced.

The present invention has been made by paying attention to such problems existing in the conventional technology. The purpose is to provide a girder support that can easily perform expansion and contraction operations, has good work efficiency, can shorten work time, and can secure required durability. It is in.

[0007]

Means for Solving the Problems In order to achieve the above object, according to the first aspect of the present invention, there is provided an outer pipe and an inner pipe inserted inside the outer pipe. A cutting beam support configured to reciprocate in an axial direction, wherein a female screw member is provided on the outer pipe or the inner pipe, and a male screw member screwed to the female screw member and extending in the axial direction of both pipes in both pipes. And the two pipes are made to extend and contract through the female screw member by rotating the male screw member.

In the invention according to claim 2, in the cutting beam support according to claim 1, the inner pipe or the outer pipe and the male screw member are rotated by a male screw member to connect the two pipes via the female screw member. It is provided with an interlocking member for expanding and contracting operation.

According to a third aspect of the present invention, in the cutting beam support according to the second aspect, the interlocking member is a bevel gear. According to the fourth aspect of the present invention, in the first aspect,
The beam support according to any one of claims 1 to 3, wherein the insides of the two pipes are substantially sealed.
At least the outer end of each pipe has a closed structure.

According to a fifth aspect of the present invention, in the cutting beam support according to the fourth aspect, a sealing material is interposed in the sliding portion in order to improve a sealed state between the two pipes. .

According to a sixth aspect of the invention, in the cutting beam support according to any one of the first to fifth aspects, the male screw member is prevented from being disengaged from the female screw member. This is provided with retaining means.

According to a seventh aspect of the present invention, in the girder support according to any one of the first to sixth aspects, a panel for receiving earth pressure is connected to the two pipes via a connecting member. It was done.

According to an eighth aspect of the present invention, in the cutting beam support according to any one of the first to seventh aspects, the female screw member reduces the diameter of the outer pipe or the inner pipe,
It is provided in the reduced diameter portion.

According to a ninth aspect of the present invention, in the cutting beam support according to any one of the first to eighth aspects, the outer peripheral surface of the outer pipe or the inner pipe is moved in the axial direction of the two pipes. A display unit for measuring a distance is provided.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 3, the cutting beam support 11 of this embodiment is fitted into a large-diameter outer pipe 19 formed of metal in a cylindrical shape, and inside the outer pipe 19. And a small-diameter inner pipe 20.

The pair of pads 13 is attached to the outer ends of the outer pipe 19 and the inner pipe 20. A pair of pressing plates 14 as a pressing body are formed in a substantially rectangular shape by a metal plate, and each pad 13 is arranged between a pair of ribs 14a protruding inward so as to face each other. The pin 13 can be swung by inserting the pin 15 through the hole of the rib 14a into the pad 13.

A pair of positioning plates 1 having a substantially L-shaped cross section.
4b is welded and fixed to the outer surface of each pressing plate 14, and as shown in FIG.
In the case of mounting between the six panels, these positioning plates 14b are mounted on the belly 17 of each panel 16.
A pair of latch frames 18 are rotatably mounted on the upper ends of the ribs 14a of the pressing plates 14, and are not shown in these latch frames 18 when the beam support 11 is removed from between the panels 16 of the earth retaining structure. A pull-out tool or the like can be engaged.

A female screw member 21 made of a metal and having a disk shape has a female screw hole 21 a formed at the center thereof and is welded to the inner end of the inner pipe 20. The support plate 24 as a support member is formed in a disk shape by metal, and is welded to the inner peripheral surface of the outer pipe 19 near the outer end in a state where the thrust bearing 22 is attached to the center thereof. I have. A pair of through holes 23 facing each other are formed through the peripheral wall of the outer pipe 19.

The long male screw member 25 is connected to the outer pipe 1.
9 and has a threaded portion 25b, and one end is a cylindrical rotating shaft portion 25a. The screw portion 25b is screwed into the female screw hole 21a of the female screw member 21. The rotating shaft portion 25a is provided with the thrust bearing 22 and the support plate 2 in a state where earth pressure or the like applied to the end portion 25c of the male screw member 25 via the female screw member 21 is received by the thrust bearing 22.
4 is supported. In this state, the first bevel gear 26 as the interlocking member is joined to the end of the rotating shaft 25a.

The retaining plate 27 as retaining means is
It is formed in the shape of a square plate of metal, and is welded to the end of the screw portion 25b of the male screw member 25. This retaining plate 27
Is formed larger than the female screw hole 21a so that when the male screw member 25 is screwed down to the female screw member 21 to the end thereof, the screwed state between the male screw member 25 and the female screw member 21 is prevented from being disengaged. It has become.

The handle 28 includes an annular grip portion 29,
And a shaft portion 30 attached to the center of the grip portion 29. The shaft portion 30 of the handle 28 is inserted into a pair of through holes 23 provided to face the outer pipe 19 and a second bevel gear 31 as an interlocking member is provided between the shaft portions 30. Are joined. The second bevel gear 31 has the same diameter as the first bevel gear 26, and meshes with the first bevel gear 26. When the second bevel gear 31 is turned by the handle 28, the first bevel gear 26 is turned, and the male screw member 25 is turned. When the male screw member 25 is rotated,
The female screw member 21 screwed to the male screw member 25 moves, and accordingly, the inner pipe 20 is moved relative to the outer pipe 19 as shown by a two-dot chain line in FIG. At this time, the length of each of the pipes 19 and 20 at the time of maximum expansion is substantially twice as long as the length at the time of minimum contraction.

A pair of annular packings 32 are mounted on the outer periphery of the shaft 30 of the handle 28 so as to contact the inner peripheral surface of the outer pipe 19. The packing 32 allows the shaft portion 30 of the handle 28 to be connected to the outer pipe 1.
The gap with the through hole 23 of 9 is closed to prevent foreign matter such as pebbles, sand, and soil from entering the inside of the outer pipe 19 from the gap. In addition, other packing 3
Numeral 2 is attached to the outer periphery of the rotation shaft portion 25a between the screw portion 25b of the male screw member 25 and the thrust bearing 22.

The sealing cylinder 33 as a sealing material is formed in a substantially U-shaped cross section by polyurethane or the like, and is fitted to the inner end of the outer pipe 19. An annular groove 34 having a semicircular cross section is formed on the inner peripheral surface of the inner end of the outer pipe 19, and the O-ring 3 as a sealing material made of synthetic rubber or the like.
5 is fitted. Then, the seal cylinder 33 and O-
The gap between the inner peripheral surface of the inner end of the outer pipe 19 and the outer peripheral surface of the inner pipe 20 is sealed by the ring 35 so as to prevent foreign matters such as pebbles, sand, and soil from entering the inside from the gap. It has become.

Next, the operation of the girder support 11 configured as described above will be described. Now, when the cutting beam support 11 having the above configuration is used for earth retaining support, as shown in FIGS. 2 and 3, the handle 28 is rotated to rotate the second bevel gear 31 and the first bevel gear 26. The male screw member 25 is screwed away from the female screw member 21 via.
At this time, the female screw member 21 moves to the inner end side of the outer pipe 19, the inner pipe 20 extends in the axial direction from the inside of the outer pipe 19, and the two pipes 19, 20 are extended according to the width of the cut beam. . Next, the positioning plate 14b of the cutting beam support 11 is placed on the protuberances 17 of the panels 16 erected at predetermined intervals, and both pressing plates 14 face the side surfaces of the protuberances 17 respectively. Let it. In this state, if necessary, handle 2
8 is rotated so that the two pressing plates 14 abut on the side surfaces of the respective bulges 17. As a result, the pressing plates 14 are pressed against the belly 17 and the belly 17 withstands the earth pressure or the concrete casting pressure and is maintained at a predetermined interval.

When the earth retaining structure is dismantled, when the handle 28 is turned in the opposite direction to the above, the male screw member 25 is screwed into the female screw member 21 and the outer pipe 1 is disengaged.
By storing the inner pipe 20 inside 9,
Both pipes 19 and 20 are contracted. In this state, the cutting beam support 11 is engaged with a latching frame (not shown) or the like on the latching frames 18 on both the pressing plates 14, and is pulled out from between the belly 17 and is removed.

The effects of the first embodiment will be described below. According to the cutting beam support 11 of the first embodiment, the two pipes 1 are formed by screwing or screwing the male screw member 25 provided inside the pipes 19 and 20 into the female screw member 21.
The telescopic movements 9 and 20 can be performed. For this reason, there is no need to rotate either of the pipes 19, 20 and the expansion and contraction operation of the pipes 19, 20 can be easily performed, thereby improving the working efficiency and shortening the working time. Can be.

According to the cutting beam support 11 of the first embodiment, since the male screw member 25 and the female screw member 21 are provided inside the pipes 19 and 20, it is possible to prevent adhesion of earth and sand. And required durability can be secured.

According to the cutting beam support 11 of the first embodiment, since the male screw member 25 can be rotated using the pair of bevel gears 26 and 31 as an interlocking member, the two pipes 19 and The length of 20 can be easily changed and adjusted.

According to the cutting beam support 11 of the first embodiment, since the interlocking member is a pair of bevel gears 26 and 31, the handle 28 is perpendicular to the rotation shaft 25 a of the male screw member 25. The work efficiency can be improved.

According to the girder support 11 of the first embodiment, a pair of pressing plates 14 are provided at both ends of both pipes 19 and 20, and the insides of both pipes 19 and 20 are substantially closed. For this reason, it is possible to prevent foreign matters such as pebbles, sand, and soil from entering the inside from both ends of both pipes 19 and 20, and required durability can be effectively secured.

According to the girder support 11 of the first embodiment, a seal cylinder 33 and an O-ring 35 are provided at the open end of the outer pipe 19 as a seal material. Therefore, a gap between the inner peripheral surface of the open end of the outer pipe 19 and the outer peripheral surface of the inner pipe 20 is sealed, and foreign matters such as pebbles, sand, and soil enter the inside of the two pipes 19 and 20 from the gap. Can be prevented, and required durability can be secured more effectively.

According to the cutting beam support 11 of the first embodiment, since the retaining plate 27 is joined to the distal end of the male screw member 25, even if the handle 28 is turned too much, the male screw member 25 and the female screw member 21 can be used. And the inner pipe 20 can be prevented from dropping from the outer pipe 19 due to excessive elongation of the two pipes 19, 20.

According to the cutting beam support 11 of the first embodiment, since the external thread member 25 is formed to have substantially the same length as the outer pipe 19, both pipes 1
9 and 20 are designed to extend to almost twice the length of the most extended state in the most extended state. For this reason, the expansion and contraction length of both pipes 19 and 20 can be ensured in a wide range without using an extension member or the like.

According to the cutting beam support 11 of the first embodiment, since the support plate 24 and the thrust bearing 22 are used as the support members, the bevel gears 26 and 31 can be formed by earth pressure or concrete placing pressure. It can protect and improve durability. (Second Embodiment) Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. The description of the second embodiment will focus on the differences from the first embodiment.

As shown in FIGS. 4 and 9, the beam support 11 according to the second embodiment includes a pair of pads 13.
Instead, a disc-shaped flange 40 as a pressing body is welded to the outer end of each of the pipes 19 and 20. The flange 40 has a circular hole 40a at the center.

The pair of cushioning members 41 as pressing members are formed in a cylindrical shape having a support hole 41a at the center so as to have the same diameter as the flange 40 using an elastic material such as synthetic rubber.

An elongated hole 42 penetrating vertically is formed on the peripheral surface of the outer end of each of the pipes 19 and 20, and a wedge 43 formed of a metal into a right-angled triangular plate is formed in the elongated hole 42. It has been inserted. The wedge 43 is prevented from dropping out of the elongated hole 42 by inserting the pin 43b into the locking hole 43a at the tip.

The pair of connecting members 44 are formed in a substantially T-shape by a metal and have a stopper hole 4 at the base end.
4a is provided. The display unit 54 displays the outer pipe 19
Are provided on the outer peripheral surface of the inner pipe 20 so as to correspond to the inner end surface of the inner pipe 20 and scales are formed at predetermined intervals in the longitudinal direction. Then, based on the scale of the display unit 54,
The moving distance of the two pipes 19 and 20 can be visually confirmed.

As shown in FIG. 5, the panel 16 is composed of a flat panel panel 45 and a channel-like support column 46 joined to an end of the panel panel 45. A connection hole 46a is formed through the inner wall of the support column 46. Then, as shown in FIGS.
When installing 9 and 20 between the panels 16 of the earth retaining structure,
Insert the connecting member 44 into the connecting hole 46a of each support column 46,
By rotating the pipes 19 and 20 by 90 ° and driving the wedge 43 in that state, the pipes 19 and 20 are integrated with the panel 16. As shown in FIG. 9, when the wedge 43 is driven downward,
Is engaged with the corner of the stop hole 44a, and the vertical surface 43d of the wedge 43 is engaged with the side wall of the pair of long holes 42. It is being regulated. The beam support 11 integrated in this way is mounted on a site where earth retaining is carried out by a crane or the like (not shown).

The beam support 1 of the second embodiment is now described.
When soil retaining is carried out using 1, the two pipes 19, 20 and the panel 16 are integrated on the ground according to the width of the girder. First, by turning the handle 28 in a predetermined direction, the length of each of the pipes 19 and 20 is set according to the width of the cutting beam. Next, as shown in FIG. 8A, the connecting member 44 is inserted into the connecting hole 46a of the support column 46 of the panel 16, and then, as shown in FIG. By rotating, the connecting member 44 is engaged with the support column 46. Next, as shown in FIG. 9, the wedge 43 is driven into the long holes 42 of the pipes 19 and 20 and the stop hole 44 a of the connecting member 44, and
The pipes 19 and 20 are fixed to the panel 16 by fastening the 4 to the support column 46.

Next, as shown in FIG. 6, the cutting beam support 11 in which the pair of right and left pipes 19 and 20 are integrated with the panel 16 as described above is excavated to a predetermined width and depth. It is placed in the groove by a crane (not shown) or the like. Then, in the space formed between the panels 16,
The intended civil engineering work is performed.

When the shoring support is dismantled, the pipes 19 and 20 are first contracted by rotating the handle 28 a predetermined number of times in the opposite direction. Next, the beam support 11 is moved by a crane (not shown) or the like.
Is raised. When disassembling the girder support 11 integrated with the panel 16, first, the wedge 43 is hit from the opposite direction to the case of the assembling step, and the two pipes 1 are struck.
Loosen the fastening between the panels 9 and 20 and the panel 16. Next, the two pipes 19 and 20 are rotated by 90 °, and the connecting member 44 is pulled out from the support column 46, whereby the two pipes 19 and 20 are rotated.
Is disengaged from the panel 16 and disassembly is performed.

The effects exerted by the second embodiment will be described below. According to the girder support 11 of the second embodiment, the connecting members 44 are attached to the outer ends of the pipes 19 and 20 so that the connecting members 44 can be connected to the panel 16.
For this reason, the panel 16 and the two pipes 19 and 20 can be integrated, and the installation work of the earth retaining structure can be simplified, and the working time can be shortened.

According to the girder support 11 of the second embodiment, since the display 54 is provided on the outer peripheral surface of the inner pipe 20, the moving distance of the two pipes 19, 20 can be easily determined by visual measurement. The work efficiency can be further improved.

According to the girder support 11 of the second embodiment, the pipes 19 and 20 and the connecting member 44 are connected by the wedge 43. And cutting beam support 1
When connecting 1 to the panel 16, the connecting member 44 moves and the connection is easily performed. Further, at the time of construction, the connecting member 44 is fixed by driving the wedge 43. For this reason, the assembling work of the girder support 11 and the panel 16 can be simplified, and the working efficiency can be further improved.

According to the girder support 11 of the second embodiment, since the cushioning member 41 is formed of an elastic material such as synthetic rubber, when the girder support 11 is arranged in the groove, The force such as torsion applied to the pipes 19 and 20 can be reduced, and the excavated surface can be pressed more uniformly.

Third Embodiment Hereinafter, a third embodiment of the present invention will be described with reference to FIG. Note that this third
In the embodiment, a description will be given focusing on differences from the first embodiment.

Now, as shown in FIG. 10, the cutting beam support 11 of the third embodiment comprises a first and a second bevel gear 2.
6, 31, the thrust bearing 22 and the like are omitted. Also, the pad 13 and the pressing plate 1 on the outer pipe 19 side
4 is provided with a mounting hole 50 through which a retaining plate 51 having a through hole 51a formed at the center thereof is welded.

One end of the male screw member 25 is extended to the mounting hole 50, and an engaging portion 52 formed in a quadrangular prism shape is formed at the tip of the rotating shaft portion 25a.
The engaging portion 52 of the male screw member 25 is rotatably supported by the through hole 51 a of the retaining plate 51 with the packing 32 interposed therebetween. The handle 28 is formed in a crank shape by a metal, and has a square hole 53 formed at one end surface thereof so as to be connected to the engaging portion 52.

The cutting beam support 1 of the third embodiment is now described.
When the two pipes 19 and 20 are expanded and contracted, the mounting holes 5
0, one end of the handle 28 is inserted, the engaging portion 52 is engaged with the square hole 53, and then the handle 28 is rotated.
The telescopic operation is performed.

Therefore, the cutting beam support 11 of the third embodiment is used.
According to this, it is possible to obtain essentially the same expansion and contraction effect as in the first embodiment, to simplify the configuration, and to reduce the manufacturing cost.

(Fourth Embodiment) Hereinafter, a fourth embodiment of the present invention will be described with reference to FIG. Note that this fourth
In the embodiment, a description will be given focusing on differences from the first embodiment.

Now, as shown in FIG. 11, the cutting beam support 11 of the fourth embodiment has a configuration in which the female screw member 21 is changed. That is, the inner pipe 20 has a reduced diameter portion 55 formed by reducing the diameter of the inner end. The reduced diameter portion 55 is formed as a female screw member 21 by internally threading a female screw on the inner peripheral surface. The male screw member 25 has a screw portion 25 b screwed to the female screw of the reduced diameter portion 55.

When the two pipes 19 and 20 of the girder support 11 of the fourth embodiment are expanded and contracted, the handle 28 is rotated and the expansion and contraction operation is performed as in the first embodiment.

Therefore, the girder support 11 of the fourth embodiment.
According to the present invention, it is possible to obtain essentially the same expansion and contraction effect as in the first embodiment, and to reduce the number of parts and the material cost, thereby achieving a reduction in manufacturing cost.

The above embodiment can be modified and embodied as follows. In the first to fourth embodiments, another support member is used instead of the support plate 24 and the thrust bearing 22 as the support member.

For example, as shown in FIG. 12, the rotation assisting member 56 as a supporting member is formed in a bottomed cylindrical shape.
The rotation assisting member 56 has a through hole 56a penetrating the bottom surface and a second through hole 56b formed on the peripheral surface so as to correspond to the through hole 23. Then, with the male screw member 25 inserted through the insertion hole 56a, the first bevel gear 26 is joined to the end of the male screw member 25, and the shaft 3 of the handle 28 is inserted into the through hole 23 and the second through hole 56b.
0, and the second bevel gear 3 is inserted in the middle of the shaft portion 30.
Joining one.

Alternatively, as shown in FIG.
Instead of 4, a part of the outer pipe 19 is reduced in diameter to form a reduced diameter support portion 24a, and a thrust bearing 22 is attached to the inner peripheral surface thereof, and the male screw member 25 is inserted into and supported by the thrust bearing 22.

Even in the case of such a configuration, the rotation can be assisted while supporting the male screw member 25 as in the present embodiment. In the first to fourth embodiments, the seal cylinder 33 and the O-ring 35 are omitted.

With this configuration, the sealing performance inside the pipes 19 and 20 is reduced as compared with the present embodiment, but the required sealed state can be maintained, and
It is easy to reduce the number of parts and to reduce the manufacturing cost.

At this time, as shown in FIGS. 14A and 14B, the four projecting portions 5 are formed on the inner peripheral surface of the outer pipe 19.
7, at least three protruding portions 57 are provided on the inner peripheral surface of the outer pipe 19 or the outer peripheral surface of the inner pipe 20 to prevent rattling when the two pipes 19, 20 expand and contract. desirable.

In the first to fourth embodiments, FIG.
As shown in (a), the retaining plate 27 is omitted. With this configuration, the effect of preventing the inner pipe 20 from falling off is eliminated as compared with the present embodiment, but the same expansion and contraction length as in the present embodiment can be secured, the number of parts is reduced, and the manufacturing cost is reduced. It is easier to achieve a reduction.

In the first to fourth embodiments, FIG.
As shown in (1), the inner pipe 20 is formed in the shape of a square tube, and the outer pipe 19 is formed in the shape of a square tube so that it can be inserted into the inner pipe 20. Alternatively, both pipes 19, 2
0 is formed in a hexagonal cylinder, an octagonal cylinder, or the like.

In the case of such a configuration, the effect can be obtained essentially in the same manner as in the present embodiment. In the fourth embodiment, the formation position of the reduced diameter portion 55 is
For example, the middle of the inner pipe 20 or the like.

Even in the case of such a configuration, the expansion and contraction effect of the two pipes can be essentially obtained as in the present embodiment. In the first to fourth embodiments, the male screw member 25 is provided on the inner pipe 20 and the female screw member 21 is provided on the outer pipe 19.

For example, as shown in FIG. 16, an interlocking member is provided inside the inner pipe 20, and a male screw member 25 extends from the interlocking member toward the outer pipe 19 in the axial direction. The outer pipe 19 has a female screw member 21 attached to the middle of the inside thereof. The two pipes 19 and 20 are configured to expand and contract in the axial direction by screwing the male screw member 25 and the female screw member 21 together.

Alternatively, in the above configuration, the female screw member 21 is formed of a reduced diameter portion obtained by reducing a part of the outer pipe 19 in place of the reduced diameter portion 55 obtained by reducing the diameter of the inner pipe 20 in the fourth embodiment. And In addition, in the above configuration, a reduced diameter support portion formed by reducing a diameter of a part of the inner pipe 20 is used instead of the support plate 24 provided on the inner pipe 20.

With this configuration, the expansion and contraction lengths of the two pipes 19 and 20 are reduced as compared with the respective embodiments, but the same expansion and contraction effect as in the present embodiment can be obtained. In the first, second and fourth embodiments, the handle 2
Change the shape of 8. For example, as shown in FIG. 17A, a pair of engaging protrusions 58 protruding laterally is provided at the tip of the shaft portion 30. The handle 28 is formed in a crank shape, and has a pair of engagement grooves 59 formed in a peripheral wall at a base end. The expansion and contraction operation of the pipes 19 and 20 is performed by rotating the handle 28 after engaging the engagement protrusion 58 of the shaft 30 with the engagement groove 59 of the handle 28. thing.

Alternatively, as shown in FIG.
A hexagonal column-shaped head 60 is provided at the leading end of 0, and a hexagon hole 61 is formed in the head 60. Alternatively, as shown in FIG. 17C, a cross groove 62 is formed in the head 60. Then, the shaft 30 is rotated by means such as engaging a wrench (not shown) with the head 60, engaging a wrench (not shown) with the hexagonal hole 61, or engaging a driver (not shown) with the cross groove 62. The expansion and contraction operation of both pipes 19 and 20 is thereby performed.

With this configuration, the expansion and contraction effect essentially similar to that of the present embodiment can be obtained, and the handle 28 can be rotated with less force. In the first to fourth embodiments, the shape of the retaining plate 27 is, for example, a disk shape, a hexagonal plate shape, a triangular plate shape, or the like.

With this configuration, the same effect of preventing the external thread member 25 from falling off as in the present embodiment can be obtained. In the first, third and fourth embodiments, the pressing plate 14
For example, as a method of joining the positioning plate 14b to the pressure plate, a plurality of holes corresponding to the pressing plate 14 and the positioning plate 14b are made, bolts are inserted into those holes, and tightened and fixed with nuts. Alternatively, the upper portion or the lower portion of the pressing plate 14 is cut off, and the cut portion is bent so as to extend in the horizontal direction. Alternatively, the upper portion of the pressing plate 14 is extended upward, and the extended portion is bent so as to extend in the horizontal direction.

Even in the case of such a configuration, the two pipes 19,
20 can be placed. In the first, third, and fourth embodiments, the same display unit 54 as in the second embodiment is provided on the outer peripheral surface of the inner pipe 20.

With this configuration, the length of expansion and contraction of both pipes 19 and 20 can be easily grasped visually as in the second embodiment. In the first to fourth embodiments, a display section is provided on the outer peripheral surface of the outer pipe 19.

That is, when a display section is provided on the outer pipe 19, a window formed of, for example, a long hole having a scale or the like is provided through the outer peripheral surface of the outer pipe 19, and the end of the inner pipe 20 is connected to the display section. And confirm the length of expansion and contraction of both pipes 19 and 20 by visually confirming and comparing.

Even in the case of such a configuration, it is possible to easily determine the length of expansion and contraction of the two pipes 19, 20 as in the case where the display unit 54 is provided on the outer peripheral surface of the inner pipe 20.

In the first, second and fourth embodiments, the mounting position of the handle 28 is changed by a predetermined distance in the axial direction or circumferential direction of the pipes 19 and 20 as desired.

With this configuration, it is possible to provide the girder support 11 in which the mounting position of the handle 28 is changed according to the work place, and it is possible to effectively improve work efficiency.

In the first, second and fourth embodiments, in place of the pair of bevel gears 26 and 31, other configurations such as a helical bevel gear, a staggered bevel gear, and a helical bevel gear are used. Constructing the girder support 11 by an interlocking member.

With this configuration, the same expansion and contraction effect as that of the present embodiment can be obtained. In the first and second embodiments, the first and second bevel gears 26 and 31 having the same diameter are configured as the first and second bevel gears 26 and 31 having different diameters.

With this structure, the expansion and contraction effect essentially the same as that of the present embodiment can be obtained, and the force applied to the handle 28 and the expansion and contraction of both pipes 19 and 20 in the expansion and contraction operation of the two pipes 19 and 20 can be achieved. The speed at which they are performed can be appropriately changed as desired.

For example, when the first bevel gear 26 has a small diameter and the second bevel gear 31 has a large diameter, both pipes 19 and 20 can be expanded and contracted more quickly. Also,
When the first bevel gear 26 has a large diameter and the second bevel gear 31 has a small diameter, the handle 28 can be rotated with a smaller force.

In the second embodiment, the diameters of the flange 40 and the buffer member 41 having the same diameter are different from each other. For example, a large-diameter buffer member 41 is configured for a small-diameter flange 40. Or,
The small-diameter buffer member 41 is configured for the large-diameter flange 40.

Even in the case of such a configuration, the same buffer effect as that of the present embodiment can be obtained. -In the second embodiment, either the flange 40 or the cushioning member 41 is omitted to form the pressing body.

Even in the case of such a configuration, the same effect of pressing the panel 16 as in the present embodiment can be obtained. Further, a technical idea grasped from the embodiment will be described below.

(1) The girder support according to any one of claims 1 to 9, wherein a pair of pressing members are attached to ends of the two pipes. With this configuration, the excavated surface can be pressed more uniformly.

(2) A pair of pressing members are attached between the two pipes and the panel, and at least a portion of the pressing member that contacts the panel is made of an elastic material. The girder support according to any one of the above.

With this configuration, it is possible to reduce the force such as torsion applied to both pipes, and to press the excavated surface more uniformly. (3) A long hole penetrating in a direction perpendicular to the axial direction is provided at an outer end portion of the two pipes, and the connecting member is connected to the two pipes by inserting a wedge through the long hole. A girder support according to any one of claims 7 to 9.

In such a configuration, the movement of the connecting member can be restricted or released by driving or removing the wedge, so that the work of attaching to the panel can be simplified and the working efficiency can be improved.

(4) A projection according to any one of claims 1 to 9, wherein a protrusion is provided on the inner peripheral surface of the outer pipe or the outer peripheral surface of the inner pipe to prevent rattling when the two pipes expand and contract. Circular beam support described in Crab.

With this configuration, it is possible to prevent rattling when the two pipes expand and contract. (5) On the inner peripheral surface of the outer pipe or the inner pipe,
The cutting beam support according to any one of claims 1 to 9, further comprising a support member for supporting rotation of the male screw member.

With such a configuration, the rotation of the male screw member can be assisted while the male screw member is supported at a predetermined position. (6) The cutting beam support according to (5), wherein the support member has a function of receiving earth pressure applied to the male screw member via the female screw member.

With this configuration, the interlocking member can be protected from earth pressure, and the durability can be improved. (7) The girder support according to (5), wherein the support member is formed by reducing a diameter of a part of the outer pipe or the inner pipe.

With this configuration, the support member can be easily formed.

[0095]

The present invention is configured as described above, and has the following effects. According to the cutting beam support according to the first aspect of the present invention, it is not necessary to directly rotate one of the two pipes, and the male screw and the female screw member are arranged in both pipes. The pipe can be easily expanded and contracted, the working efficiency is good, the working time can be reduced, and the required durability can be secured.

According to the cutting beam support of the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the interlocking member is provided, the length of both pipes can be easily set by the interlocking member. Changes can be adjusted.

According to the cutting beam support of the third aspect, in addition to the effect of the second aspect, since the interlocking member is a bevel gear, the interlocking member is interlocked with the expansion and contraction directions of both pipes. The rotation direction of the member can be changed, and the working efficiency can be improved.

According to the cutting beam support of the invention described in claim 4, in addition to the effect of the invention described in any one of claims 1 to 3, at least the outer end of each pipe has a closed structure. Therefore, the insides of both pipes can be made substantially closed, and the intrusion of earth and sand into both pipes can be prevented, and the maintenance work can be simplified.

According to the girder support of the fifth aspect of the invention, in addition to the effect of the fourth aspect of the present invention, the sealing material is interposed in the sliding portion, so that both pipes are sealed. Can be improved, and the intrusion of earth and sand etc. into both pipes can be reliably prevented, so that the maintenance work can be further simplified.

According to the girder support of the invention described in claim 6, in addition to the effect of the invention described in any one of claims 1 to 5, in addition to the provision of the retaining means, both pipes are provided. It is possible to prevent the external thread member from falling off due to excessive extension.

According to the cutting beam support of the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1 to 6, a panel for receiving earth pressure via a connecting member. Since the panels are connected to each other, the panel and the girder support can be integrated, so that the installation work of the shoring support can be simplified and the working time can be shortened.

According to the cutting beam support of the invention described in claim 8, in addition to the effect of the invention described in any one of claims 1 to 7, an internal thread member can be obtained by reducing the diameter of the pipe. Therefore, it is possible to reduce the number of parts and achieve a reduction in manufacturing cost.

According to the cutting beam support of the ninth aspect of the present invention, in addition to the effect of the first aspect of the present invention, since the display portion is provided, the expansion and contraction of both pipes is achieved. The length can be easily measured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a cutting beam support according to a first embodiment.

FIG. 2 is a front sectional view showing a use state of the cutting beam support of the first embodiment.

FIG. 3 is a front sectional view in which a part of a section support is enlarged.

FIG. 4 is a perspective view showing a cutting beam support according to a second embodiment.

FIG. 5 is a perspective view showing a panel for receiving earth pressure according to a second embodiment.

FIG. 6 is a perspective view showing a cutting beam support to which panels are connected.

FIG. 7 is a front sectional view showing a use state of a cutting beam support according to a second embodiment.

8A is a side sectional view showing a state where a connecting member is inserted into a panel, and FIG. 8B is a side sectional view showing a state where the connecting member is connected to a panel.

FIG. 9 is a partially enlarged front sectional view showing a state where the connecting member is fixed.

FIG. 10 is an enlarged front sectional view showing a part of a beam support according to a third embodiment;

FIG. 11 is an enlarged front sectional view showing a part of a beam support according to a fourth embodiment;

FIG. 12 is a partially enlarged front sectional view showing another form of a girder support.

FIG. 13 is an enlarged front sectional view showing a part of a cutting beam support of another embodiment.

14 (a) is a front sectional view showing a part of a cut beam support of another form in an enlarged manner, and FIG. 14 (b) is a side sectional view of a part showing a cut beam support of another form.

FIG. 15 is a partial perspective view showing another form of a girder support.

FIG. 16 is a partially enlarged front sectional view showing another form of a beam support.

17A is an exploded perspective view showing another form of a handle, FIG. 17B is a perspective view showing another form of a handle,
(C) is a perspective view showing another form of handle.

FIG. 18 is a front sectional view showing a use state of a conventional cutting beam support.

[Explanation of symbols]

11: Cut beam support, 16: Panel, 19: Outer pipe, 20: Inner pipe, 21: Female screw member, 25: Male screw member, 26: First bevel gear as interlocking member, 27 ...
A retaining plate as retaining means, 31 a second bevel gear as an interlocking member, 33 a sealing cylinder as a sealing material, 35 an O-ring as a sealing material, 44 a connecting member, 54 a display unit, 55 ... reduced diameter portion.

Claims (9)

[Claims] 1. A cutting beam support having an outer pipe and an inner pipe fitted inside the outer pipe, wherein the cutting pipe support is configured to reciprocate both pipes in the axial direction, wherein the outer pipe or the inner pipe is provided. A female screw member is provided on the pipe, and a male screw member that is screwed to the female screw member and extends in the axial direction of both pipes is provided in both pipes. A girder support that is configured to extend and retract. 2. The cutting beam support according to claim 1, wherein the inner pipe or the outer pipe and the male screw member are provided with an interlocking member that rotates the male screw member to extend and contract the two pipes via the female screw member. 3. The bevel gear according to claim 2, wherein said interlocking member is a bevel gear.
Cut beam support as described in. 4. The girder support according to claim 1, wherein at least the outer ends of the respective pipes have a sealed structure so that the insides of the two pipes are substantially sealed. 5. The girder support according to claim 4, wherein a sealing material is interposed in the sliding portion in order to improve a sealed state between the two pipes. 6. The cutting beam support according to claim 1, wherein said male screw member is provided with a retaining means for preventing a screwed state with said female screw member from coming off. 7. The girder support according to claim 1, wherein a panel for receiving earth pressure is connected to the two pipes via a connecting member. 8. The cutting beam support according to claim 1, wherein the female screw member has a reduced diameter of the outer pipe or the inner pipe and is provided at a reduced diameter portion thereof. 9. The cutting device according to claim 1, wherein a display is provided on an outer peripheral surface of the outer pipe or the inner pipe to measure a moving distance of the two pipes in the axial direction. Beam support.