JP2002357095A - Member-to-member joint device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint device of a fitting type without using a bolt and a nut, which facilitates introduction and control of a fastening force to a cavity between members to be connected together, and can absorb the manufacturing tolerance and mounting tolerance of a joint. SOLUTION: According to the joint device, a T-shaped member 1 as a male joint is attached to a joint plate 2 of one of the members to be connected together. The T-shaped member has a flange which is inclined with a predetermined gradient. Then, a slit 5 as a female joint is formed in a joint plate 4 of the other member so as to have a slit size sufficient for the T-shaped member 1 to be inserted therein, and a gradient accommodating member 3 is housed in a housing 7 in which a fitting groove is formed, followed by temporarily fixing the gradient accommodating member 3 to the housing 7 by means of a temporary fixing bolt 6 from a side surface of the housing 7. When the T-shaped member 1 is squeezed into the slit such that a gradient portion of the T-shaped member makes contact with the gradient accommodating member 3, a fastening force is generated between the joints, and application of a predetermined shearing force or more to the temporary fixing bolt 6 brings about shear failure of the temporary fixing bolt 6. Then, further squeezing of the T-shaped member 1 brings about maintenance of a predetermined fastening force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-member joint device for connecting members such as structures, and for example, a unitized building structural member (one of which may be a structural body). It can be used for connection of tunnels and connection of tunnel lining segments.

[0002]

2. Description of the Related Art Conventionally, as a joint for connecting members, a joining method using a bolt and a nut is generally known, and is widely used in all fields including the field of a shield tunnel.

[0003] However, this joining method is complicated, and requires a very high degree of technology to make it robotic. Therefore, it cannot be said that this method is necessarily appropriate in terms of automation of assembly and labor saving.

[0004] In order to improve this point, in the field of shield tunnels, aggressive development of technology for changing a joint of a segment for constructing a tunnel from a conventional bolted joint to a boltless joint has been actively performed. Various joints have been proposed.

[0005] For example, fitting type joints are disclosed in Japanese Patent Application Laid-Open Nos. 8-296397 and 11-107689.
And Japanese Patent Application Laid-Open No. 2001-32688.

More specifically, for example, Japanese Patent Application Laid-Open No. 2001-2001
In Japanese Patent No. 32688, a fitting groove as a female joint is formed in one of the joint surfaces of the segment, and an H-shaped steel is embedded in the other as a male joint so that one flange portion protrudes from the joint surface. It describes that the flange surfaces are inclined at a predetermined gradient so that the joint surfaces are drawn together when the male joint is fitted from the end of the fitting groove of the female joint.

[0007]

When segments are joined without using bolts and nuts, the new segments are constructed in such a manner as to match the existing segments. At this time, there is a manufacturing error in both segments and joints, and this error greatly affects the construction accuracy.

In general, it is desirable that the joint portion tends to have a lower structural strength than the main body portion, and that a fastening force is introduced between the joint portions in order to increase the rigidity of the joint portion. This fastening force also works effectively in terms of securing water stoppage when the joint is in a water leakage environment.

Introducing and managing the initial fastening force in the joint portion is relatively easy with a conventional bolt-nut type joint, but there is a problem that it is difficult to manage the bolt-less type joint.

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned problems, and it is possible to connect members in a short time without using bolts and nuts, and to use a fitting type member which can be easily automated in assembling and joining. It is an object of the present invention to provide an inter-member joint device that can easily introduce and manage a fastening force between members to be joined and absorb a joint manufacturing error and a construction error.

[0011]

According to the first aspect of the present invention, a female joint having a fitting groove formed in a joint surface of one member to be joined to each other and projecting from a joint surface of the other member. A member joint device comprising: a male joint fitted along a groove direction of the fitting groove of the female joint;
The male joint is formed with a gradient portion having a gradient in a direction in which the joint surfaces are attracted by fitting the female joint into the fitting groove, and the female joint corresponds to the gradient portion of the male joint. A slope receiving member that has a slope and is in contact with the slope portion of the male joint is provided so as to be slidable along the fitting groove. The slope receiving member is temporarily fixed at a predetermined position in the fitting groove.

In this inter-member joint device, joining is performed by fitting a male joint to a female joint, and the male joint is slid while being pressed against a gradient receiving member of the female joint. As a result, the joint surfaces are brought into close contact with each other while joining.

The direction of the slide is a linear direction when the fitting groove of the female joint extends linearly, but is not necessarily limited to the linear direction. If so, joining can be performed by sliding in the form of rotation in the curved direction.

The slope receiving member of the female joint is temporarily fixed in the fitting groove by a temporary fastening member, but the temporary fastening member is actuated by the force acting between the sloped portion of the male joint and the slope receiving member. When a force greater than a predetermined value is received, the temporary fastening member is broken and loses its fixing function, and the slope receiving member slides in the fitting groove while maintaining the engagement relationship with the slope portion of the male joint. Will be.

At the time when the force exceeding the predetermined value acts,
The force acting on the joint surfaces of the members to be joined becomes almost the initial fastening force by the joint device of the present invention, and the gradient receiving member slides while maintaining the engagement relationship with the gradient portion of the male joint. Thus, the initial fastening force is substantially maintained.

As a specific form of the temporary fixing member, a pin or bolt-shaped member for fixing the gradient receiving member to the fitting groove from the direction perpendicular to the fitting direction can be considered.
When the gradient receiving member is temporarily fixed and receives a shearing force higher than the proof stress, it undergoes shear failure and loses the fixing function. The temporary fixing member is not limited to the one that loses the fixing function due to such shear failure, and various forms can be considered as to the mounting position. In summary, the male joint gradient part and the female joint side gradient receiving member are essential. It is only necessary that the restraint of the temporary receiving state of the slope receiving member be released (not necessarily completely released) when the force between them becomes a predetermined value or more.

In order to surely generate the initial fastening force, the slope receiving member is temporarily fixed before the position where the fitting is completed, and the temporary fixing member must be broken before the fitting is completed. In order to confirm that the fastening force has been introduced into the joint.

According to a second aspect of the present invention, in the inter-member joint device according to the first aspect, the slope receiving member restrains the movement of the male joint in the fitting direction at a position before the fitting end position of the male joint. This is limited to the case where the position is temporarily fixed.

The member-to-member joint device according to the present invention absorbs a manufacturing error of the joint device, a construction error of the building, and the like, because the position of the temporary fixing of the slope receiving member is different from the position in the final fitting state. However, in order to ensure that the error absorbing function works, the gradient receiving member is temporarily fixed at a position where the movement of the male joint in the fitting direction is restricted at a position before the male joint fitting end position. Is required. It is desirable to design the gradient length of the gradient receiving member in accordance with the allowable minus and plus errors, and to design the temporary fixing position of the gradient receiving member in consideration of this length.

According to a third aspect of the present invention, in the inter-member joint device according to the first or second aspect, the temporary fastening member is a member that is broken by receiving a predetermined or more shearing force, and a plurality of arbitrary types having different shearing strengths. The case where the temporary fixing member is replaceable is limited.

This facilitates designing of the insertion force and the joint fastening force of the joint by changing the strength category of the temporary fixing member. For example, when a bolt is used as the temporary fixing member, the bolt is standardized. As a result, the joint fastening force after fitting can be managed.

According to a fourth aspect of the present invention, in the inter-member coupling device according to the first, second or third aspect, the gradient receiving member is provided with an elastic member for maintaining a contact relationship with the gradient portion of the male joint. Is limited.

If a tensile force greater than the fastening force repeatedly acts on the joint portion after fitting of the joint, the fastening force may decrease due to the movement of the gradient receiving member.
By disposing an elastic member such as a spring or rubber at the rear part of the gradient receiving member (the side opposite to the insertion side of the male joint), it is possible to suppress the movement of the gradient receiving member.

The arrangement of the elastic member is not limited to the rear part of the slope receiving member, but may be suppressed from the side.

[0025]

FIG. 1 shows an embodiment (prototype device) of an inter-member joint device according to the present invention. A T-shaped member 1 as a male joint is provided on a joint plate 2 located on the right side in the drawing. Is attached. The T-shaped member 1 has a T-shaped cross section, and a predetermined slope is provided in a flange portion thereof.

In the drawing, a slit 5 is formed in the joint plate 4 located on the left side of the fitting plate 4 so that the inclined T-shaped member 1 can be inserted therein. The gradient receiving member 3 is housed therein, and the gradient receiving member 3 is temporarily fixed from the side surface of the housing 7 with the temporary fixing bolt 6.

In the actual fitting of the joint, the position where the T-shaped member 1 and the gradient receiving member 3 come into contact slightly fluctuates due to manufacturing errors and construction errors of the joint portion. Provided before the position where the part ends mating,
In order to absorb the error, the gradient length of the gradient receiving member 3 is made longer than the gradient length of the gradient T-shaped member 1.

The joint fastening mechanism of the present invention will be described below in three processes by using the above-described prototype apparatus shown in FIG.

(1) Process 1 Insert the sloped T-shaped member 1 into the slit 5 of the female joint,
The joint plates 2 and 4 are pressed against each other, and the T-shaped member 1 which is a male joint is slid in the fitting direction with an insertion load P (FIG. 2).
(a) and (b)).

(2) Process 2 Both the male and female joints come into contact with each other,
Shear force is generated. Accordingly, a fastening force is introduced between the male and female joints (see FIGS. 3 (a) and 3 (b)).

(3) Process 3 The temporary fixing bolt 6 is sheared and broken by the load P1, and thereafter, while maintaining the fastening force P2, the male T-shaped member 1 as a male joint and the female slope-receiving member 3 on the female joint side are further joined. Slide to complete the fitting (see FIGS. 4 (a) and 4 (b)).

In order to confirm the fastening mechanism, a fitting experiment was performed. The objectives of the experiment were three points: whether a fastening force could be introduced into the joint, whether errors in production and construction could be absorbed, and the insertion load could be changed depending on the strength classification of the temporary fastening bolt. Table 1 shows the specifications of the test pieces.

The joint is manufactured by changing the height of the web of the T-shaped member by changing the web height of the T-shaped member on the basis of 1/10 of the gradient of the T-shaped member and the fastening force being introduced from 40 mm before the end of the fitting. Was simulated.

That is, the web height is set to the design value (30 m
Specimen A which was 2 mm lower than m) was 20 mm lower than the design.
Specimens B and C, which are 2 mm longer, are introduced from the near side and the specimens B and C are introduced 20 mm behind the design, and a total of 4 mm error is absorbed in the 40 mm sliding range determined from the joint gradient. Further, in the specimen C, the strength classification of the bolts was 10.9 to 4.8 for A and B.
Reduced to

[0035]

[Table 1]

FIG. 5 shows the relationship between the insertion load P and the insertion displacement δ. For the insertion displacement δ, the fitting end position was set to 0. The following is qualitatively assumed as the insertion behavior until the end of the fitting.

As the T-shaped member and the slope receiving member become familiar, the load gradually increases due to frictional resistance between the joints.

The load suddenly increases from the position where the joint gradient portion comes into close contact, and the joint fastening force is introduced until the temporary fastening bolt breaks.

[0039] The temporary fixing bolt is sheared and the load is temporarily reduced.

Thereafter, the fitting of the joint is completed while the frictional resistance between the joints is caused by the generation of the joint fastening force.

The rise of the insertion load was -6 for the specimen A.
0 mm, and the specimens B and C are in the vicinity of -20 mm, and show the expected behavior. In addition, since the maximum insertion loads of the specimens A and B were approximately equal to 380 kN, it was confirmed that the insertion force could be controlled to be almost constant. Further, from the comparison of the test pieces B and C, it was confirmed that the joint insertion force can be easily adjusted by changing the strength category of the temporary fixing bolt.

In order to grasp the relationship between the insertion displacement δ and the joint fastening force N, the strain ε generated in the elongation direction of the web of the T-shaped member attached to measure the insertion displacement δ and the fastening force in FIG. The relationship between the calculated fastening force N is shown. The strains generated in the T-shaped members all corresponded to the rise of the insertion load shown in FIG.
B was 600 μm and specimen C was 360 μm. afterwards,
Until the fitting of the joint was completed, the behavior was generally maintained at this value.

From these results, the joint fastening force of the specimens A and B was calculated to be 200 kN per one place, and the specimen C was calculated to be 120 kN per one place.
It was confirmed that the fastening force was determined by the shear strength of the temporary fastening bolt. In addition, the joint insertion force also depends on the shear strength of the temporary fixing bolt, and when designing the present joint, determine the conditions of the temporary fixing bolt while considering the joint inserting force and the initial fastening force required for the joint. It is desirable.

As described above, the joint structure of the present invention not only obtains the fastening force by the shear strength of the bolt, but also causes the bolt to undergo shear failure, thereby maintaining the joint fastening force at a constant level. It can be confirmed that it has a function of absorbing errors.

FIG. 7 shows an embodiment in which the joint device of the present invention is applied to a concrete structure. By attaching the anchor streaks 8 to the joints, the joints are integrated with the concrete member 9, and it is possible to exhibit joint rigidity without damaging the concrete member 9 with respect to the joint pull-out force. The mounting method is not particularly limited in the present invention as long as the mounting method can exert the function of the joint.

Although the embodiment of FIG. 7 shows a form of connection between two concrete members 9, a large number of segments are arranged in the direction of the ring and the direction of the tunnel, for example, a segment for lining of tonenur. It can also be used as a joint between the pieces of the segments constituting the segment ring, in which case the fitting groove on the female joint side can be configured to insert a male joint from the end of the joint surface. .

[0047]

According to the member-to-member joint device of the present invention, the error between both joint members is absorbed by simply pressing the joint surface of the joint member against the other joint surface and sliding the joint member, and the desired predetermined fastening is achieved. It is possible to gain strength. Further, maintenance of the fastening force is facilitated.

Further, the present joint device has high pull-out stiffness, bending stiffness, and shear stiffness between the joining members by obtaining the fastening force.

In terms of construction, as compared with the conventional bolt and nut system, it is possible to cope with automation, so that labor saving and speeding up of construction are realized, and construction cost is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment (prototype device) of an inter-member joint device of the present invention.

FIGS. 2A and 2B show a fastening process 1 by the prototype device of FIG. 1, wherein FIG.
Is a sectional view taken along the line A-A.

FIG. 3 shows a fastening process 2 following FIG. 2;
(a) is a front view from the inside of the female joint, and (b) is its A-
It is A sectional drawing.

FIG. 4 shows a fastening process 3 following FIG. 3;
(a) is a front view from the inside of the female joint, and (b) is its A-
It is A sectional drawing.

FIG. 5 is a graph showing a relationship between an insertion load and an insertion displacement in a fitting experiment using a test piece simulating an error.

FIG. 6 is a graph showing a relationship between a generated strain and an insertion displacement of a sloped T-shaped member in a fitting experiment using a test piece simulating an error, and the Y2 axis represents a joint fastening force estimated from the generated strain. Is shown.

FIG. 7 is a perspective view showing an embodiment in which the member-to-member joint device of the present invention is applied to a concrete structure.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... T-shaped member with slope, 2 ... Joint plate, 3 ... Slope receiving member, 4 ... Joint plate with slit, 5 ... Slit, 6 ... Temporary fixing bolt, 7 ... Housing, 8 ... Anchor bar, 9 ... Concrete member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayoshi Iwahashi 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal Industries, Ltd. (72) Inventor Yoichi Ishikura 3 Kitahoku-ji Temple-cho, Chuo-ku, Osaka, Osaka 6-1-1 Konoike Gumi Co., Ltd. (72) Inventor Akio Nishimura 3-6-1 Kitakyuhoji-cho, Chuo-ku, Osaka-shi, Osaka F-term (reference) 2D055 BA01 GC01 GC04 LA12 2E125 AA51 AE02 AG08 AG41 BA02 BB01 BB02 BB08 BB09 BB12 BB25 BB31 BC09 BE08 BF05 CA46 CA71 EA11 EA33 3J001 FA02 GA07 GB01 HA02 HA03 HA09 JD16 KA19 KA26 KB04

Claims (4)

[Claims] 1. A female joint having a fitting groove formed in a joint surface of one member to be joined to each other, and a female joint projecting from a joint surface of the other member and extending along a groove direction of the fitting groove of the female joint. In the inter-member joint device including the male joint to be fitted and fitted, the male joint is formed with a gradient portion having a gradient in a direction of drawing the joint surfaces together by fitting the female joint into the fitting groove. The female joint has a slope corresponding to the slope of the male joint, and a slope receiving member that is in contact with the slope of the male joint is provided slidably along the fitting groove. The inter-member joint device, wherein the gradient receiving member is temporarily fixed to a predetermined position in the fitting groove by a temporary fixing member that loses a fixing function by receiving the above force. 2. The member according to claim 1, wherein the slope receiving member is temporarily fixed to a position where the movement of the male joint in the fitting direction is restricted at a position before the fitting end position of the male joint. Joint equipment. 3. The temporary fixing member according to claim 1, wherein the temporary fixing member is a member that is broken by receiving a predetermined or more shearing force, and arbitrary plural types of temporary fixing members having different shear strengths can be exchanged. Member joint device. 4. The inter-member coupling device according to claim 1, wherein the gradient receiving member is provided with an elastic member for maintaining a contact relationship with the gradient portion of the male joint.