JP7157399B2 - Connectors used for tunnel steel shoring - Google Patents

Description

The present invention relates to connectors for tunnel steel shoring.

Conventionally, the NATM construction method (New Austrian Tunneling Method) is known as a method for constructing mountain tunnels. The NATM construction method uses shotcrete, rock bolts, steel shoring, and the like.

This steel shoring is composed of a plurality of members formed in an arc shape, and adjacent shorings are connected to each other by connecting plates provided at the ends of each shoring together with bolts and nuts. It is connected by connecting using (see, for example, Patent Document 1).

JP 2018-131865 A

The joints of the shoring are often located near the zenith of the tunnel. As a result, the operator has to move to the vicinity of the zenith and manually connect the connection plates provided at the ends of the shoring using bolts and nuts, which takes time. rice field.

Also, if a stone or the like enters the nut during the connecting work, there is a risk that a problem will occur when connecting the bolt and the nut.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a connector for use in a tunnel steel shoring which solves the above problems.

In order to solve the above problems, the invention according to claim 1 is used for a tunnel steel shoring used for connecting arc-shaped tunnel steel shorings to each other, and includes a female connecting member and a male connecting member. has
A connector for a worker to connect the female connecting member and the male connecting member at a construction site,
The female coupling member has a storage chamber in which both ends in the axial direction are open, and a tapered hole having a tapered surface whose diameter is reduced on one side in the axial direction is formed in the storage chamber. a female locking member arranged to be slidable in the axial direction and a locking portion that engages with the locking portion of the male coupling member;
a barrel-shaped coil spring that biases the female locking member toward the one side;
leaving the opening on one side of the casing open and closing the opening on the other side of the casing with a resin closing member;
The closure member has a cross-shaped first notch provided at the center thereof, and a first notch provided radially about the axial center of the casing at the outer peripheral portion of the first notch, and not communicating with the first notch. forming a second notch,
The opening closed by the closing member is opened by inserting the male connecting member from the opening on one side , and protrudes outward from the other side of the casing . Connectors used for shoring.

The invention according to claim 2 is the invention according to claim 1 , in which a plurality of sliding guide ridges are formed on the inner surface of the casing in the circumferential direction, and between adjacent sliding guide ridges, the female locking mechanism is provided. It is characterized by providing a member.

The invention of claim 3 is characterized in that, in the invention of claim 1 or 2 , the locking portion of the female locking member is formed of a spiral locking crest and locking groove. be.

The invention according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the locking portion of the female locking member is annularly formed in the circumferential direction and parallel to each other. It is characterized in that it is formed by locking grooves parallel to the locking ridges.

In the present invention, a storage chamber is provided in a casing, both ends of which are open in the axial direction, a tapered hole having a tapered surface whose diameter is reduced on one side in the axial direction is formed in the storage chamber, and a female mold is formed in the tapered hole. The locking member is arranged to be slidable in the axial direction, and a locking portion consisting of a plurality of locking ridges is engraved on the inner surface of the female locking member to urge the female locking member to the one side. By providing the biasing member, the shorings can be connected simply by inserting the male connecting member that engages with the female locking member into the storage chamber without relatively rotating. , can shorten the working time.

In addition, by providing a closing member at the other end of the casing that closes the opening on the other end of the storage chamber and that at least partially opens when the shorings are connected together, stones and the like can be removed during the connection work. Intrusion into the casing of the female locking member can be suppressed.

FIG. 2 is a partial cross-sectional view of the female coupling member in Example 1 of the present invention, which is taken half as a cross section. The figure seen from the left of FIG. The figure seen from the right of FIG. FIG. 4 is a schematic diagram showing a state in which shorings are connected to each other using a connecting tool in Example 1 of the present invention. Fig. 4 is an enlarged partial cross-sectional view showing a state in which the coupler is attached to the shoring and the shorings are not connected to each other according to the first embodiment of the present invention; FIG. 2 is a partial cross-sectional view for explaining the connection between the female connecting member and the male connecting member in FIG. 1; Sectional drawing of an example which shows the modification of the biasing member in Example 1 of this invention. FIG. 5 is a cross-sectional view of another example showing a modification of the biasing member according to the first embodiment of the present invention; FIG. 11 is a rear view of an example showing a modification of the closing member according to the first embodiment of the present invention; FIG. 11 is a rear view of another example showing a modification of the closing member in Embodiment 1 of the present invention. FIG. 11 is a partial cross-sectional view of an example of a female coupling member in Embodiment 3 of the present invention; A partial cross-sectional view of another example of the female coupling member in Embodiment 3 of the present invention. FIG. 11 is a partial cross-sectional view of an example of a female coupling member in Embodiment 4 of the present invention;

A mode for carrying out the invention will be described based on an embodiment shown in the drawings.

[Example 1]
FIG. 1 shows a partial cross-sectional view of a female coupling member 1 according to Embodiment 1 of the present invention, with a half surface taken as a cross section, FIG. 2 shows a view from the left side, and FIG. 3 shows a view from the right side. is.

The female coupling member 1 has a casing 3, and the outer shape of the vertical cross section perpendicular to the axis XX is formed in a nut-like hexagon as shown in FIG. A storage chamber 4 is formed which is open at both ends in the direction of the core XX. In addition, the outer shape of the casing 3 can be formed in any shape other than the hexagonal shape, such as a circular shape or a polygonal shape.

The inner peripheral surface of the front part of the storage chamber 4 is tapered so that the inner diameter gradually increases from the insertion side (one side) 4a of the male coupling member 2 described later to the inner side (other side) 4b. , and the rear portion of the storage chamber 4 is formed in a cylindrical shape. A stop member 8 having an insertion hole 8a formed in the center thereof is fixed to the rear end of the casing 3 by caulking or the like. The stop member 8 is a plate-like member formed in a flange shape.

A cylindrical insertion portion 9 is formed on the insertion side 4a of the storage chamber 4, and an opening 4e is formed on the insertion side 4a of the insertion portion 9. As shown in FIG.

On the inner surface of the tapered hole 5, a plurality of sliding guide ridges (not shown) along the axis XX direction of the casing 3 are formed at suitable intervals in the circumferential direction of the tapered hole 5. there is In the tapered hole 5, a wedge-shaped female locking member 12 divided into a plurality of parts in the circumferential direction is slidable in the axial center XX direction of the casing 3 between the sliding guide ridges. are placed in In this embodiment, the number of female locking members 12 is three as shown in FIG. 2, but the number may be one or more and can be set arbitrarily. In addition, the female locking member 12 is formed in a cylindrical shape, and a plurality of cuts from the end of the insertion side 4a to the back portion 4b side and a plurality of cuts from the end of the back portion 4b to the insertion side 4a side are alternately formed in the circumferential direction. By forming the female locking member 12 integrally formed, a female threaded hole 12c, which will be described later, can be expanded or contracted. Note that the female locking member 12 is also referred to as a wedge nut 12 hereinafter.

Further, the outer surface of the wedge-shaped female locking member 12 is formed as a tapered surface 12a along the tapered surface of the tapered hole 5, that is, the outer diameter gradually increases from the insertion side 4a to the inner portion 4b. there is Further, on the inner peripheral surface of each female locking member 12, a locking portion (female thread) 12b consisting of a helical locking crest and locking groove is formed in an arc around the axis XX of the casing 3. and is carved in a direction along the axis XX. As long as the spiral locking portion 12b is formed in a spiral shape, a screw thread having an arbitrary shape can be used as the cross-sectional shape thereof, and the axial cross-section thereof is in the shape of an isosceles triangle or a right-angled triangle. , scalene triangle, or any other shape. Moreover, the dimension of the interval (pitch) between the locking ridges can be set arbitrarily.

As shown in FIGS. 1, 2, and 6, a plurality of wedge nuts 12 form locking holes (female screw holes) 12c, and each wedge nut 12 extends along the tapered hole 5 at the inner portion 4b. By retreating to the side, the diameter of the female screw hole 12c is expanded, and by moving to the insertion side 4a, the diameter of the female screw hole 12c is reduced.

In addition, the sliding guide ridge can be arbitrarily formed, for example, it is formed in a spiral shape, and as the female engaging member 12 moves toward the inner portion 4 b, the female thread 12 b of the female engaging member 12 and The connection with a male thread 2a formed on the male side connecting member 2 and described later may be loosened. Further, although it is not necessary to provide the sliding guide ridges, if the slidable guide ridges are provided, the male coupling member 2 can be connected to the female coupling member 1 in the connected state of the female coupling member 1 and the male coupling member 2. It is easy to rotate with respect to the die connecting member 1, and retightening and releasing of the connected state can be easily performed.

A moving member 14 is provided in the storage chamber 4 behind the wedge nut 12 so as to be movable in the direction of the axis XX. The moving member 14 is commonly engaged with each of the wedge nuts 12, and is fixed to a flange portion 14b having a through hole 14a formed in the center thereof and extending from the inner peripheral end of the flange portion 14b toward the inner side. and a cylindrical guide portion 14c. As shown in FIG. 1, the rear end of the guide portion 14c is formed so as to be located on the insertion side 4a relative to the stop member 8 when the female coupling member 1 and the male coupling member 2 are not coupled. .

The inner diameters of the through hole 14a and the guide portion 14c are set larger than the outer diameter of the male coupling member 2. As shown in FIG. Further, the outer diameter of the guide portion 14c is set smaller than the inner diameter of the insertion hole 8a of the stop member 8. As shown in FIG.

In this embodiment, the guide portion 14c is formed in a cylindrical shape with an inner diameter that is substantially the same throughout the axial center XX direction. Alternatively, it may be formed so as to increase in diameter until it reaches the insertion side 4a. When the guide portion 14c is formed in this manner, its outermost diameter is set smaller than the inner diameter of the insertion hole 8a of the stop member 8. As shown in FIG.

A biasing member 15 is interposed between the flange portion 14b and the stop member 8 in the storage chamber 4. As shown in FIG. The biasing member 15 is made of an elastic member such as a coil spring, rubber, resin, or urethane. In the present embodiment 1, as shown in FIG. 1, a conical coil spring is used and stored in a compressed state. The biasing force of the biasing member 15 constantly biases the wedge nut 12 and the moving member 14 toward the insertion side 4a.

As shown in FIGS. 1 and 3, at the end of the casing on the back 4b side (the other side), an opening 4d on the back 4b side of the housing chamber 4 is closed and a male connection (described later) is provided. A closing member 16 is provided that is torn by insertion of the member 2 to open at least a portion thereof.

The closing member 16 has a cross-shaped first notch 17a in the center and a portion of the casing 3 on the outer periphery of the first notch 17a, as shown in FIG. A plurality of second notches 17b are formed in the radial direction around the axis XX at appropriate intervals in the circumferential direction. The first notch 17a and the second notch 17b are not communicated.

The closing member 16 can be formed of any material that can be torn around the notches 17a and 17b when the male connecting member 2 is inserted through the storage chamber 4. For example, the closing member 16 can be made of paper. , resin, felt, cellophane, rubber, etc. In this embodiment, it is made of resin having stretchability and flexibility.

As shown in FIGS. 5 and 6, the male connecting member 2 is formed in a rod shape, and has a locking groove and a helical locking ridge centered on the axis XX on its outer peripheral surface. A stop portion (male screw) 2a is engraved in the direction along the axial center XX of the casing 3. As shown in FIG. This helical locking portion 2a is formed in a helical shape, and as long as it can be engaged with the locking portion 12b of each female locking member 12, a screw thread having an arbitrary cross-sectional shape can be used. Its axial cross section can be formed in any shape such as an isosceles triangle, a right triangle, or a scalene triangle.

A retaining portion 23 having a diameter larger than the outermost diameter from the locking portion 2a is formed at the inner end portion of the male connecting member 2. As shown in FIG.

A connecting tool 20 is composed of the female connecting member 1 and the male connecting member 2 .

Next, a method of connecting tunnel steel shorings (hereinafter referred to as shorings) 21 and 22 using a connector 20 comprising the female connecting member 1 and the male connecting member 2 will be described.

As shown in FIGS. 4 and 5, shorings 21 and 22 made of steel and formed in an arc shape are formed with connection plates 21a and 22a at the connection side ends thereof, respectively. Insertion holes 21b and 22b are formed in the connection plates 21a and 22a, respectively. The number of insertion holes 21a, 21b formed in each connection plate 21a, 22a can be set arbitrarily.

First, as shown in FIG. 5, the connection plate 21a of one shoring 21 to be connected and the connection plate 22a of the other shoring 22 to be connected are brought close to each other by any means.

Next, a worker inserts the leading end of the male connecting member 2 into the insertion hole 21b of one of the shorings 21 from the side opposite to the side of the other shoring 22, and the insertion hole of the other shoring 22 is inserted. 22b.

Next, the tip portion of the male coupling member 2 is inserted into the receiving chamber 4 of the female coupling member 1 without rotating each other. By inserting the male connecting member 2, each wedge nut 12 is pushed toward the inner portion 4b, and the wedge nut 12 and the moving member 14 move backward against the biasing force of the biasing member 15. As shown in FIG. The male connecting member 2 expands the diameter of the threaded hole 12c formed by each wedge nut 12, and is inserted into the threaded hole 12c while getting over the locking ridge of the locking portion 12b of each wedge nut 12. As shown in FIG.

As shown in FIG. 6, the closing member 16 is torn when the male connecting member 2 is inserted, and the central portion of the closing member 16 is bent backward along the outer peripheral surface of the male connecting member 2. The tip of the male connecting member 2 protrudes outward from the inner end of the casing 3 .

When connecting the female connecting member 1 and the male connecting member 2, as shown in FIG. Even if it is tilted more than a predetermined amount, as shown in FIG. Guided to the axial center XX side, the engaging portion 2a of the male coupling member 2 is restrained from engaging with the stop member 8, and the male coupling member 2 is inserted to a predetermined position.

After that, each wedge nut 12 and the moving member 14 are moved by the biasing force of the biasing member 15.

4a, the diameter of the threaded hole 12c formed by each wedge nut 12 is reduced by the tapered hole 5, and the engaging portion 12b of each wedge nut 12 meshes with the engaging portion 2a of the male coupling member 2. , the female connecting member 1 and the male connecting member 2 are connected, and the shorings 21 and 22 are connected. Also, if necessary, retighten.

In this way, the female coupling member 1 and the male coupling member 2 of the present invention are not rotated with each other, and the tip of the male coupling member 2 is inserted into the receiving chamber 4 of the female coupling member 1. can be connected by Positioning of the male coupling member 2 and the female coupling member 1 during mutual insertion is easy, and can be performed more easily and quickly than the work of inserting a normal bolt into the hole of the nut. Further, even if there is a dent or the like on the outer peripheral portion of the locking portion 2a, the effect on the connecting work between the female connecting member 1 and the male connecting member 2 can be suppressed.

In addition, a closing member 16 for closing the opening 4d on the other end of the storage chamber 4 is provided at the far side (other side) end of the female connecting member 1, so that one side of the female connecting member 1 is open. Since the other side is closed by the closing member 16, one side and the other side of the female connecting member 1 can be distinguished at a glance, and the female connecting member 1 can be connected to the end of the other shoring 22 to be connected. It is possible to prevent a mistake in the mounting direction to the connection plate 22a provided in the part.

In addition, since the closing member 16 is provided at the far side (other side) end of the female connecting member 1, when the shoring 21 on one side and the shoring 22 on the other side are connected, stones and dust are prevented from entering the storage chamber 4. , etc., can be prevented from adhering to the engaging portion 12b of the wedge nut 12, and the female coupling member 1 and the male coupling member 2 can be securely fastened.

In addition, after the one shoring 21 and the other shoring 22 are connected, in the male connecting member 2 projecting from the other side of the casing 3, at least the outer peripheral portion on the side of the casing 3 is covered with the bent closing member 16. Thus, it is possible to suppress the intrusion of water or the like into the casing 3 and suppress the rusting of the inside of the female coupling member 1 .

Also, as shown in FIG. 1, when a conical coil spring is used as the biasing member 15, the force of the biasing member 15 (coil spring) is greater than when the coil spring is cylindrical. The length in the axial direction when compressed can be shortened, the length in the axial direction XX of the female coupling member 1 can be shortened, and the size can be reduced.

In addition, a plurality of sliding guide ridges along the axis XX direction of the casing 3 are formed in the tapered hole 5 in the circumferential direction, and the female locking member 12 slides between the sliding guide ridges. As a result, the wedge nut 12 can be supplied by rotating either the female connecting member 1 or the male connecting member 2 even after the one shoring 21 and the other shoring 22 are connected. The coupling between the female coupling member 1 and the male coupling member 2 can be released without turning.

In the above embodiment, the locking portion (female screw) 12b is formed on the inner peripheral surface of the female locking member 12, but at least the inner peripheral surface of the female locking member 12 is connected to the male connecting member 2. The locking portion 12b may be omitted by using a material softer than that of the locking portion 2b. At least the inner peripheral surface of the female locking member 12 is made of a material softer than the locking portion 2 b of the male connecting member 2 , so that the locking portion of the male connecting member 2 is formed inside the female locking member 12 . The inner peripheral surface of the female locking member 12 may engage with the outer peripheral surface of the locking portion 2b when the locking portion 2b is inserted.

Also, when the biasing member 15 is formed of a coil spring and formed in a drum shape as shown in FIG. 7 or in a barrel shape as shown in FIG. It is possible to achieve the same effect as in the case of using a coil spring formed in the .

Also, the notches 17a and 17b formed in the closing member 16 are not limited to the shape shown in FIG. It may be formed in an arbitrary shape as long as it assists, and the closing member 16 does not need to be cut. When the notches 17a and 17b are formed, it is preferable to form them at least in the center of the casing 3, which is the axial center XX. For example, the shape can be formed as shown in FIGS.

Further, the shape of the guide portion 14c of the moving member 14 can be arbitrarily formed other than the shape described above. Further, the guide portion 14c may be provided on the inside portion of the stop member 8 instead of being provided on the moving member 14, or the guide portion 14c may not be provided.

[Example 2]
In the first embodiment, the engaging portion 2a of the male coupling member 2 and the engaging portion 12b of the female engaging member 12 are formed by spiral engaging ridges and engaging grooves. , 12b are provided with a plurality of annular locking ridges and locking grooves orthogonal to the respective axes YY and XX, which are parallel to each other and continuous in the axial direction. It may be arranged.

As with the spiral locking portion of the first embodiment, the annular locking portion can have an arbitrary cross-sectional shape. It can be formed in any shape, such as a shape, scalene triangle shape, or the like. Moreover, the dimension of the interval (pitch) between the locking ridges can be set arbitrarily.

Since the other members have the same structure as that of the first embodiment, description thereof will be omitted.

Also, in the second embodiment, substantially the same functions and effects as in the first embodiment are obtained.

In addition, in the second embodiment of the present invention, the engaging portion 2a of the male connecting member 2 and the engaging portion 12b of the female engaging member 12 are perpendicular to the axes YY and XX. A plurality of annularly formed locking ridges and locking grooves are continuously arranged parallel to each other in the axial direction, so that the female coupling member 1 and the male coupling member 2 are formed. After the connection, the mutual connection is released by some action, and it is possible to prevent the female connection member 1 and the male connection member 2 from coming off.

[Example 3]
In Embodiments 1 and 2, the closing member 16 closes the opening 4d on the side of the inner part 4b of the casing 3. However, as shown in FIG. The opening 4e on the insertion side 4a of the casing 3 may be closed by providing the opening 4e on the insertion side 4a of the casing 3. Alternatively, as shown in FIG. The opening 4d on the side of the portion 4b may be closed.

When the closing member 16 is provided on the insertion side 4a and the inner portion 4b side of the casing 3, the respective colors are changed so that the insertion side 4a and the inner portion 4b side of the casing 3 can be easily distinguished. It is preferable to

Since the other members have the same structure as in the first and second embodiments, description thereof is omitted.

Further, in the present Example 3 as well, the same actions and effects as those of the above-described Examples 1 and 2 can be obtained.

[Example 4]
In Examples 1 to 3 above, the closing member 16 closes the opening 4e on the insertion side 4a of the casing and/or the opening 4d on the depth 4b side. By inserting the blocking member 30 elongated in the direction from the opening 4e of the insertion side 4a in the casing 3 to the opening 4d of the inner part 4b, the opening 4e of the insertion side 4a of the casing and the inner part The opening 4d on the 4b side may be closed.

As the closing member 30, any member such as sponge, corrugated cardboard, wood, or bolts may be used. It can be formed in any shape other than the shape shown in FIG. 13 as long as it can move in the axial direction.

The closing member 30 may block only one of the opening 4e on the insertion side 4a of the casing and the opening 4d on the back 4b side.

When the male connecting member 2 is inserted through the opening 4e on the insertion side 4a of the casing 3, the closing member 30 is pushed by the male connecting member 2 to move or compress to the inner side. As a result, the opening 4e on the insertion side 4a and/or the opening 4d on the side of the inner part 4b closed by the closing member 30 is opened.

Since the other members have the same structure as those of Examples 1 to 3, description thereof will be omitted.

Also, in the present embodiment 4, the same actions and effects as in the above embodiments 1 to 3 can be obtained.

[Other Examples]
Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

REFERENCE SIGNS LIST 1 female coupling member 2 male coupling member 3 casing 4 storage chamber 5 tapered hole 12 female locking member 12b locking portion 15 biasing member 16, 30 closing member 20 coupling 21, 22 tunnel steel shoring

Claims (4)

Used for tunnel steel shoring used to connect arc-shaped tunnel steel shoringhaving a female connecting member and a male connecting member,
workA connector for a worker to connect the female connecting member and the male connecting member at a construction site,
The female coupling member has a storage chamber in which both ends in the axial direction are open, and a tapered hole having a tapered surface whose diameter is reduced on one side in the axial direction is formed in the storage chamber. a female locking member arranged slidably in the axial direction and a locking portion that engages with the locking portion of the male coupling member;
biasing the female locking member toward the one side;and a barrel-shaped coil springprovided,
Leave the opening on one side of the casing open. , of said casingotherthe opening on one side,of resinblocked by a blocking member,
The closing member has a cross-shaped first notch provided at the center thereof, and a first notch provided radially about the axial center of the casing at the outer peripheral portion of the first notch, and not communicating with the first notch. forming a second notch,
The opening closed by the closing member can be opened by inserting the male connecting member through the opening on one side.open and protruding outwardly from the other side of said casingA connector used for a tunnel steel shoring, characterized by: 2. The tunnel steel according to claim 1 , wherein a plurality of sliding guide ridges are formed on the inner surface of the casing in the circumferential direction, and the female locking member is provided between adjacent sliding guide ridges. Connectors used for shoring. 3. A connector used for tunnel steel shoring according to claim 1 or 2 , wherein the locking portion of said female locking member is formed of a helical locking crest and locking groove. 4. The locking portion of the female locking member is formed in a ring shape in the circumferential direction, and is formed by locking ridges parallel to each other and locking grooves parallel to each other. 1. A connector used for the tunnel steel shoring according to claim 1.

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