JP7437367B2 - How to connect coupling devices and connected members - Google Patents

Description

The present invention relates to a coupling device for connecting one and other connected members at a connecting portion behind a main body, and a method for connecting connected members.

Conventionally, arch-shaped steel shoring used in tunnel construction is divided into a plurality of parts, brought into the tunnel, and generally connected using bolts, nuts, etc. (for example, Patent Documents 1 and 2) reference).

Japanese Patent Application Publication No. 2013-129985 Registered utility model No. 3211895

The above-mentioned shoring is made of steel such as H-shaped steel or T-shaped steel, and is installed in a place in contact with the tunnel (earth), with its ends abutted against each other, and the flange section is inserted from the inner side of the tunnel. It is connected at the position of the web part located between the ground and the back of the ground. As a result, it is difficult for workers to directly see the bolt connection position because the flange gets in the way, and the working space between the flange and the ground behind it is narrow, making it difficult to tighten the nuts on the bolts. The workability is not good, such as not being easy.

The present invention has been made in view of the above points, and an object of the present invention is to provide a joint device and a method for connecting connected members that have good workability in connecting connected members.

The joint device according to claim 1 is a joint device for connecting connected members each including a main body portion and a connecting portion formed behind the main body portion at a position of the connecting portion, wherein one of the connected members a connecting body disposed on both sides of the connecting portion of the connecting member and the connecting portion of the other connected member; a connecting body having a head at one end and a screwing portion at the other end; a bolt to be inserted from one of the connecting bodies to the other connecting body via the connecting part, and a bolt to be inserted into each of the one connected member and the other connected member; The device includes a nut that is screwed onto the threaded portion, and a spacer that restricts the head of the bolt and the nut to protrude from one side and the other side of the main body portion.

A joint device according to a second aspect of the present invention is the joint device according to the first aspect, wherein the connecting body is a splice plate.

A joint device according to a third aspect of the invention is the joint device according to the first or second aspect, in which the connected member is a member constituting a support for a tunnel.

A method for connecting connected members according to claim 4 is a method for connecting connected members comprising a main body portion and a connecting portion formed behind the main body portion, using the coupling device according to any one of claims 1 to 3. A method for connecting members to be connected, in which a bolt inserted into one spacer is connected to the connecting portion of one of the members to be connected and the connecting portion of another member to be connected. one of the connecting bodies overlapped on one side with the connecting body; the connecting part of one of the connected members overlapped on the other side with the connecting part of the other connected member; and the connecting body of the bolt, inserting another spacer into the other end of the bolt, and screwing the nut into the threaded portion of the bolt. One of the spacers, one of the connecting bodies, one of the connecting parts, another of the connecting bodies, and another of the spacers are interposed between the nut and the one of the connected members and the other of the connected members. It connects the

The method for connecting members to be connected according to claim 5 is the method for connecting members to be connected according to claim 4, in which when the nut is screwed into the threaded portion, the nut is temporarily tightened and the position of the connecting body is adjusted. After that, the nut is fully tightened.

According to the present invention, the workability of connecting members to be connected is improved.

FIG. 1 is a front view showing a joint device according to an embodiment of the present invention. It is a side view showing the joint device same as the above. It is a sectional view showing an example of the shoring which consists of connected members connected by the joint device same as the above. 4 is a sectional view taken along line II in FIG. 3. FIG. It is a top view which shows one process of the connection method of a to-be-connected member same as the above. FIG. 6 is a plan view showing a step subsequent to the step shown in FIG. 5 of the method for connecting the connected members same as above. FIG. 7 is a plan view showing a step subsequent to the step shown in FIG. 6 of the method for connecting the connected members same as above.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 indicates a joint device. The coupling device 1 connects a plurality of connected members 2 to each other. The member to be connected 2 is made of steel, for example. In this embodiment, as shown in FIGS. 3 and 4, the connected member 2 is a member that constitutes a shoring 3 used for lining the tunnel T. The connected members 2 are formed in an arch shape and are arranged along the circumferential direction of the cross-sectional shape of the tunnel T by being connected by the joint device 1 with their ends abutted against each other.

In this embodiment, six connected members 2 are used for one shoring 3, for example. In the illustrated example, the connected members 2 include three connected members 2a, 2b, 2c forming the upper arch portion of the tunnel T, two connected members 2d forming both side wall portions of the tunnel T, 2e and one connected member 2f that constitutes an inverted portion on the lower side of the tunnel T are set. The coupling device 1 connects both ends of the connected member 2a and the connected members 2b, 2c, connects the lower end of the connected member 2b and the upper end of the connected member 2d, and connects the lower end of the connected member 2c. and the upper end of the connected member 2e are connected, and the lower ends of the connected members 2d and 2e and both ends of the connected member 2f are connected to form one annular shoring 3. In this embodiment, six joint devices 1 are set. By dividing the shoring 3 into a plurality of connected members 2 in this way, the worker can easily carry the connected members 2.

A plurality of shorings 3 configured by connecting a plurality of connected members 2 are each fixed by a fixing member 5 on a frame 4 and arranged in the axial direction of the tunnel T, and these shorings 3 are separated in the axial direction. They are connected in the axial direction by a connecting member 6 between them, and are fixed to the ground 7, which is the installed part of the tunnel T, by a fixing member 8.

The frame 4 is made of, for example, H-beam steel. The pedestal 4 is arranged so as to extend along both sides of the tunnel T. In this embodiment, the connected member 2f at the lower part of the shoring 3 is fixed to the upper part of the pedestal 4 at a central position by the fixing member 5.

The fixing member 5 is, for example, a hole-in anchor bolt. The fixing member 5 is arranged along the cross-sectional radial direction of the tunnel T from the connected member 2f side to the pedestal 4 side in a direction that intersects or perpendicularly crosses or perpendicularly to the longitudinal direction of the connected member 2f.

The connecting member 6 is made of, for example, H-beam steel. In this embodiment, the connecting member 6 is attached to the lower part of the connected member 2f near both ends using a bracket and bolts and nuts. The connecting member 6 extends in a direction intersecting or perpendicular to the pedestal 4.

The fixing member 8 is, for example, a hole-in anchor bolt. The fixing member 8 is arranged along the cross-sectional radial direction of the tunnel T from the side of the connected members 2a to 2e to the ground 7 side in a direction that intersects or perpendicularly with the longitudinal direction of the connected members 2a to 2e.

As shown in FIGS. 1 and 2, the connected member 2 is made of, for example, a shaped steel. In this embodiment, the member to be connected 2 is made of T-shaped steel. In the illustrated example, the connected member 2 integrally includes a main body portion 10 that is a flange portion, and a reinforcing portion 11 that is a web portion that projects from the main body portion 10 . As shown in FIG. 3, the connected member 2 is installed with the main body 10 located on the inner side of the tunnel T and the reinforcing portion 11 facing the earth 7 side.

As shown in FIG. 1, the main body portion 10 has at least a width W. As shown in FIG. In this embodiment, the width W of the main body portion 10 is set to be constant or substantially constant. The main body portion 10 is formed into a plate shape, and is formed in a band-like manner in the longitudinal direction of the connected member 2 .

The reinforcing portion 11 is formed narrower than the main body portion 10. The reinforcing portion 11 protrudes from behind the main body 10 in a direction intersecting or perpendicular to the main body 10 . The reinforcing portion 11 has a plate shape having both sides in the width direction of the main body portion 10 . As shown in FIG. 3, the reinforcing part 11 is interposed between the main body part 10 and the earth 7. That is, the reinforcing part 11 is arranged in the space S between the main body part 10 and the ground 7. This space S is a work space for connecting members 2 to be connected using the coupling device 1. This space S is narrower in the front-rear direction than the width W of the main body portion 10.

A mounting portion 12 into which the fixing member 5 or the fixing member 8 is inserted is integrally formed in the reinforcing portion 11 . The attachment portion 12 is formed into a plate shape and is located parallel or substantially parallel to the main body portion 10 . The attachment portions 12 are arranged near both ends of the connected member 2 or at the center in the direction of both ends. The attachment portion 12 is formed to protrude laterally from both sides of the main body portion 10 . Therefore, the operator M can easily insert the fixing member 5 or the fixing member 8 into the attachment part 12 from the main body part 10 side.

Further, as shown in FIGS. 1 and 2, the reinforcing portion 11 is formed with a connecting portion 13 for connecting at least the members 2 to be connected by the coupling device 1. As shown in FIGS. That is, the connecting portion 13 is located behind the main body portion 10 . The connecting portion 13 is located at least at the end of the reinforcing portion 11 in the longitudinal direction. The attachment part 12 is located near the connection part 13. The connecting portion 13 is configured such that a hole portion 14 is formed in the reinforcing portion 11 to penetrate the reinforcing portion 11 in the thickness direction. That is, the connecting portion 13 has a predetermined thickness t1 in the width direction of the main body portion 10. The hole 14 is a round hole having a predetermined hole diameter. In the illustrated example, two holes 14 are formed for each connection portion 13. These holes 14 are spaced apart from each other at predetermined intervals in the longitudinal direction of the connected member 2 .

The joint device 1 includes a connecting body 15 disposed across the connecting portions 13, 13 of the adjacent connected members 2, 2. The connecting body 15 is formed into a longitudinal plate shape. The connecting body 15 is a splice plate having a predetermined thickness t2. In this embodiment, the thickness t2 of the connecting body 15 is set to be equal or approximately equal to the thickness t1 of the connecting portion 13. An insertion hole 16 corresponding to the hole 14 of the connecting portion 13 is formed in the connecting body 15 . The insertion hole 16 is a round hole having the same or approximately the same diameter as the hole 14 . In this embodiment, four insertion holes 16 are provided for each connecting body 15. Two insertion holes 16 correspond to the holes 14 of the connecting portion 13 of one of the connected members 2 adjacent to each other, and the remaining two insertion holes 16 correspond to the holes 14 of the connecting portion 13 of one of the connected members 2 adjacent to each other. This corresponds to the hole 14 of the connecting portion 13 of the other connected member 2 of the connecting members 2 . The insertion holes 16 are arranged at equal or approximately equal intervals to the holes 14.

In this embodiment, a pair of connecting bodies 15 are set, including one connecting body 15a located on one side of the connecting part 13 and another connecting body 15b located on the other side of the connecting part 13. .

A bolt 17 is inserted from one connecting body 15a to the other connecting body 15b via the connecting portion 13 of the connected member 2. In other words, the bolt 17 is inserted through the insertion hole 16 of one coupling body 15a, the hole 14 of the connection part 13, and the insertion hole 16 of the other coupling body 15b. The bolt 17 of this embodiment is a long bolt, and is formed to have a length L1 longer than the width W of the main body portion 10 of the connected member 2. Here, the width W of the main body portion 10 is defined as the width W of the main body portion 10 at the portion where the bolt 17 is located. That is, it is assumed that the main body part 10 has a partially uneven shape in the width direction. shall be defined as the width at the part where

The bolt 17 has a head 18 at one end and a threaded portion 19 at the other end. In this embodiment, the bolt 17 is, for example, a hexagonal bolt whose head 18 is hexagonal. The threaded part 19 may be arranged from the head 18 of the bolt 17 to the other end, or may be arranged only at the other end.

A nut 20 is screwed onto the threaded portion 19 of the bolt 17 . In this embodiment, the nut 20 is a hexagonal nut formed to have approximately the same size as the head 18 of the bolt 17.

Further, a spacer 21 is interposed between the bolt 17 and nut 20 and the connecting body 15. In this embodiment, the spacer 21 is formed into a cylindrical shape, for example, a cylindrical body into which the bolt 17 can be inserted. In the illustrated example, the spacer 21 is formed in the shape of a long pipe, with an axial length L2 larger than the radial dimension.

The axial length L2 of the spacer 21 is set to more than half of the value obtained by subtracting the thickness t1 of the connecting portion 13 and twice the thickness t2 of the connecting body 15 from the width W of the main body portion 10 of the connected member 2. has been done. That is, L2≧(W−t1−2·t2)/2. Further, the length L1 of the bolt 17 is set to be longer than the sum of twice the axial length L2 of the spacer 21, the thickness t1 of the connecting portion 13, and twice the thickness t2 of the connecting body 15. has been done. That is, L1>(2*L2+t1+2*t2). Therefore, the spacer 21 is configured to restrict the positions of the head 18 of the bolt 17 and the nut 20 to a position where they protrude to one side and the other side of the main body 10.

Further, the inner diameter of the spacer 21 is smaller than the outer diameter of the head 18 of the bolt 17 and the nut 20. Therefore, the spacer 21 is held between the head 18 of the bolt 17 and the nut 20. In this embodiment, the spacer 21 includes one spacer 21a interposed between the head 18 of the bolt 17 and one connecting body 15a, and a spacer 21a interposed between the nut 20 and the other connecting body 15b. Another pair of spacers 21b are set. Therefore, the end of one spacer 21a serves as a seat for the head 18 of the bolt 17, and the end of the other spacer 21b serves as a seat for the nut 20.

Next, a method for connecting members 2 to be connected using the joint device 1 of one embodiment will be described.

As shown in FIG. 3, the worker M connects the connected member 2 to the adjacent connected member 2 from the main body 10 side, that is, from the inner space side of the tunnel T, using the coupling device 1.

First, the ends of the connected members 2 are butted against each other, and the connected members 2 are aligned in the width direction, that is, in the axial direction of the tunnel T. At this time, it is difficult for the worker M to visually observe the connecting portion 13 located behind the main body 10, that is, between the main body 10 and the earth 7 from the inside of the tunnel T.

Next, as shown in FIG. 5, the worker M inserts the bolt 17 into one of the spacers 21a and inserts it through the insertion hole 16 of one of the connecting bodies 15a, thereby connecting one of the connecting bodies 15a to the adjacent one. The bolt 17 is further inserted into the hole 14 of the connection part 13 and passed to the other side while overlapping the connection parts 13, 13 of the connected member 2. At this time, the axial length L2 of the first spacer 21a is set to more than half of the value obtained by subtracting the thickness t1 of the connecting part 13 and twice the thickness t2 of the connecting body 15 from the width W of the main body part 10. , and the length L1 of the bolt 17 is longer than the width W of the main body portion 10 of the connected member 2, and twice the axial length L2 of the spacer 21, the thickness t1 of the connecting portion 13, and the width W of the connecting body 15. Since the thickness is larger than the sum of twice the thickness t2, when one spacer 21a is held between the head 18 of the bolt 17 and the one connecting body 15a, the head of the bolt 17 18 protrudes from the space S on one side of the main body 10, and the threaded part 19 at the tip of the bolt 17 protrudes from the space S on the other side of the main body 10, and are located on the inner side of the tunnel T. It becomes directly visible to worker M.

In this state, the operator M sequentially passes the tip of the protruding bolt 17 through the insertion hole 16 of the other connecting body 15b and the other spacer 21b, as shown in FIG.

Then, as shown in FIG. 7, by screwing the nut 20 onto the threaded portion 19 of the bolt 17 protruding from the other side of the main body 10, there is a gap between the head 18 of the bolt 17 and the nut 20. One spacer 21a, one connecting body 15a, the connecting portion 13, another connecting body 15b, and another spacer 21b are interposed therebetween. Note that the nut 20 is temporarily tightened manually by the worker M. At this time, the axial length L2 of the other spacer 21b is set to more than half of the value obtained by subtracting the thickness t1 of the connecting portion 13 and twice the thickness t2 of the connecting body 15 from the width W of the main body portion 10. , and the length L1 of the bolt 17 is longer than the width W of the main body portion 10 of the connected member 2, and twice the axial length L2 of the spacer 21, the thickness t1 of the connecting portion 13, and the width W of the connecting body 15. Since the thickness is larger than the sum of twice the thickness t2, the nut 20 can be placed on the other side of the main body 10 while the other spacer 21b is held between the nut 20 and the other connecting body 15b. The position protrudes from the space S and is directly visible to the worker M who is located on the inner side of the tunnel T.

Subsequently, another bolt 17 is inserted into another spacer 21a and inserted into the insertion hole 16 of one coupling body 15a for the other hole 14 of the connecting portion 13, and the main body is removed. While visually observing the connection part 13 from the gap between the main body part 10 and the ground 7 on the side of the first part, one connecting body 15a is overlapped over the connection parts 13, 13 of the adjacent connected members 2, and the bolt 17 is tightened. Furthermore, it is inserted into the hole 14 of the connecting part 13 and the insertion hole 16 of the other connecting body 15b overlapped with the connecting part 13, and passed through to the other side, and then another spacer 21b is inserted into the tip of the bolt 17. , and screw the nut 20 onto the threaded portion 19. This operation is performed for one connected member 2 and another connected member 2 that are adjacent to each other.

After adjusting the positions of the first and other connecting bodies 15a and 15b in the circumferential direction of the tunnel T (vertical direction in FIGS. 1 and 2) with respect to the one connected member 2 and the other connected members 2, , fully tighten the nuts 20. For final tightening, a tightening tool such as a box wrench or a ratchet wrench is preferably used. Since the head 18 of the bolt 17 and the nut 20 each protrude on both sides of the main body 10, the nut 20 can be easily fully tightened with the tightening tool while the head 18 of the bolt 17 is held with the holding tool. can. As a result, one connected member 2 and another connected member 2 are connected by the coupling device 1.

As described above, according to one embodiment, the bolt 17 is formed longer than the width W of the main body 10, and the head 18 of the bolt 17 and the nut 20 are connected to one spacer 21a and the other spacer 21b. By regulating the head 18 of the bolt 17 that protrudes from one side and the other side of the main body 10 from the main body 10 side, While visually observing the nut 20, the tightening work can be performed using a tightening tool or the like by utilizing the space outside the space S between the main body portion 10 and the earth 7. Therefore, the field of view and work space for the worker M can be secured, and work efficiency can be improved.

Specifically, one connecting body 15a is formed by overlapping the bolt 17 inserted into one spacer 21a over one side of the connecting portion 13 of one connected member 2 and the connecting portion 13 of another connected member 2. The bolt 17 is inserted between the connecting part 13 and another connecting body 15b that overlaps the connecting part 13 of one connected member 2 and the connecting part 13 of the other connected member 2. By inserting another spacer 21b into the other end side and screwing the nut 20 into the threaded part 19 of the bolt 17, one spacer 21a and one spacer 21b are formed between the head 18 of the bolt 17 and the nut 20. Since one connected member 2 and the other connected member 2 are connected through the connecting body 15a, the connecting portion 13, the other connecting body 15b, and the other spacer 21b, the A worker M is located while visually observing the head 18 of the bolt 17 and the nut 20, respectively, with the head 18 of the bolt 17 and the nut 20 protruding from one side and the other side of the main body 10 due to the spacer 21. It becomes possible to work, and the workability becomes good.

By using a splice plate as the connecting body 15, the strength of the shoring 3 connected by the joint device 1 can be improved, and it can be easily selected from pre-standardized ones according to the required strength.

Since the connected member 2 is a member constituting the support 3 for the tunnel T, the support 3 can be assembled with the joint device 1 with good workability even in the tunnel T where space is limited. .

When screwing the nut 20 onto the threaded portion 19, the nut 20 is temporarily tightened, the position of the connecting body 15 is adjusted, and then the nut 20 is fully tightened, so that the position of the connecting body 15 can be adjusted with good workability. Easy to adjust.

Note that in the above embodiment, the connected member 2 may be an H-beam steel.

Further, the spacer 21 does not need to be cylindrical as long as it can regulate the positions of the head 18 of the bolt 17 and the nut 20 on one side and the other side of the main body 10. In addition, it is not limited to being directly interposed between the connecting body 15 and the head 18 of the bolt 17 or the nut 20, but may be interposed with another member interposed therebetween.

1 Coupling device 2 Connected member 3 Shoring 10 Main body 13 Connection portion 15 Connecting body 17 Bolt 18 Head 19 Threaded portion 20 Nut 21 Spacer T Tunnel

Claims (5)

A joint device that connects connected members including a main body and a connecting part formed behind the main body at the position of the connecting part,
a connecting body disposed on both sides of the connecting portion of one of the connected members and the connecting portion of the other connected member;
It has a head at one end, a threaded part at the other end, and connects the connecting part from one of the connecting bodies to each of one of the connected members and the other connected member. a bolt inserted across the other connecting body;
a nut screwed onto the threaded portion of the bolt;
a spacer that restricts the head of the bolt and the nut to positions where they protrude from one side and the other side of the main body;
A coupling device comprising: The coupling device according to claim 1, wherein the coupling body is a splice plate. The joint device according to claim 1 or 2, wherein the member to be connected is a member constituting a support for a tunnel. A connected member comprising a main body portion and a connecting portion formed behind the main body portion and connecting the connected members at the position of the connecting portion using the coupling device according to any one of claims 1 to 3. A connection method,
A connecting body in which a bolt inserted into one spacer is stacked on one side of the connecting portion of one of the connected members and the connecting portion of the other connected member; Insert the connection part of the connected member and the other connecting body overlapped on the other side of the connection part of the other connected member,
Insert another spacer into the other end of the bolt,
By screwing a nut into the threaded part of the bolt, one of the spacers, one of the connecting bodies, the connecting part, the other of the connecting bodies, and A method for connecting members to be connected, characterized in that one of the members to be connected and the other member to be connected are connected with another spacer interposed therebetween. 5. The method for connecting members to be connected according to claim 4, wherein when the nut is screwed onto the threaded portion, the nut is temporarily tightened, the position of the connecting body is adjusted, and then the nut is fully tightened.

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