JP3479593B2 - Secondary structure connection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary product such as a concrete structure such as a casing or a bridge girder buried underground such as an underground passage, a tunnel or a sewer (hereinafter referred to as "secondary structure").
The present invention relates to a secondary structure connection device for connecting and connecting each other.

[0002]

2. Description of the Related Art Conventionally, as a connecting device for connecting so-called secondary structures such as secondary concrete products formed by prefabricating by connecting their end faces to each other, as shown in FIGS. , A fitting cylindrical hole 50 for connection having a substantially equal diameter is formed in the front part, and an anchor screw hole 51 is formed in the rear part.
Are provided on the inner circumference of the fitting cylindrical hole 50 at substantially equal intervals X.
A plurality of pieces (3 in the illustrated example)
) Of the female connector A formed by forming the claw receiving grooves 52, 52 ...
On the outer circumference of the fitting receiving groove 52, 52 ... At the respective positions corresponding to the claw receiving grooves 52, 52 ... .., each of which is configured to have one engaging claw 56, which is urged toward each other, and has a substantially plug-like cylindrical male connector B provided with a screw hole 57 for an anchor at a rear portion thereof, and both are fitted together. By engaging with each other, the engaging claws 56, 5 formed on the male connector B side
6 ... one by one corresponding to the claw receiving groove 52 of the female connector A,
There has been proposed a structure in which 52 and so on are sequentially engaged from the inside to exert a retaining action, and the two A and B are connected to each other.

[0003]

However, in the above-described conventional connecting device, it is possible to use the thin anchor bolts 58, 58, the outer diameter of the connecting device itself is reduced, and the axial direction in the X-axis direction is reduced. In order to enhance the tensile strength, the plurality of engaging claws 56, 56 ... Cannot be arranged on the same vertical plane along the circumferential direction of the apparatus as described above, and the engaging claws 56, 56 ... Not only does the total length of the connecting device become longer because it is structured to shift at equal intervals,
Since a plurality of claw receiving grooves 52, 52 ... Must be formed on the inner circumference of the female connector A, the number of machined parts is increased, and the structure is complicated, resulting in poor workability and extremely uneconomical. , Which causes a price increase, and when the male connector B is set on the female connector A, the engaging claws 56, 56 ... Axis X of mold connector A
Since the female connector A and the male connector B are loaded in the connecting direction due to the eccentricity C with respect to the portion (see FIG. 16), the fitting shaft body 53 is particularly configured at the leading end. There was a problem that the female connector A and the male connector B were pressed by the engaging claws 56 in a bent state in a V shape (see FIG. 17), and normal connection could not be achieved.

A connecting device for a secondary structure according to the present invention was devised in view of the above problem, and a plurality of engaging claws are formed on the same vertical plane extending along the circumferential direction from the outer peripheral side of the female connector. The connecting device itself is made short by the above configuration, and the female connecting body and the fitting shaft body to be connected to the fitting cylindrical hole are configured to have a minimum necessary diameter length, thereby making the connecting device small and short. It is an object of the present invention to provide a connecting device for a secondary structure, which can reduce the manufacturing cost by simplifying the structure of the connecting device.

[0005]

In order to achieve the above object, a connecting device for a secondary structure according to the present invention is a secondary structure for connecting secondary structures such as concrete products facing each other by surface contact. In a connection device to be embedded in an object, a fitting cylindrical hole for connection having a substantially equal diameter is formed in the front part, and a screw hole for anchor is provided in the rear part, and the outer periphery is fitted in the fitting direction from the radial direction along the circumferential direction. A plurality of claw holes opened in the fitting cylinder hole are formed in a direction orthogonal to the axis of the fitting cylinder hole, and engaging claws are fitted in the respective claw holes, and an elastic body is placed on the upper part thereof. After interposing,
A cylindrical female connector configured such that the outside of the claw hole is closed by a lid and the inner tip always projects into the fitting cylindrical hole by the urging force of an elastic body, and the female connector is fitted. A ring-shaped claw receiving groove is formed at a position corresponding to each of the engaging claw positions on the outer circumference of the fitting shaft body fitted in the fitting cylinder hole, and a tip is provided at the tip outer peripheral portion of the fitting shaft body. A tapered insertion guide end that is inclined in the direction is formed, and each pawl is fitted in the pawl receiving groove in the circumferential direction beyond the insertion guide end to provide a retaining function, and the rear portion in which the this <br/> and consisting of a male connector of a substantially plug-like cylindrical shape having a threaded hole for anchoring the gist to.

According to the present invention, since the plurality of engaging claws are arranged side by side in the axial direction on the same vertical plane along the outer peripheral direction of the female connector, the female connector is attached to the female connector. A structure in which when the fitting shaft of the male connector is inserted, the male connector is simultaneously fitted into the claw receiving groove formed in the outer phase, and the male connector is simultaneously supported from the outer peripheral direction by a plurality of engaging claws. Therefore, the axes of the female connector and the male connector are completely aligned with each other, and the structure is such that an eccentric load is unlikely to occur. Further, with this configuration, it is not necessary to form an engaging claw on the male connector side, so that the shaft diameter of the male connector can be made small and the claw receiving groove on the outer periphery can be easily processed to improve the workability. In addition, it is possible to arrange a plurality of engaging claws on the same vertical section along the circumferential direction of the female connector, and it is possible to downsize the connecting device.

In the inner cavity of the claw hole, a rotation stopping mechanism for stopping the rotation of the engagement claw fitted in the claw hole is constructed, and the fitting shaft of the engagement claw fitted in the claw hole is formed. An engagement mechanism is configured to prevent dropping into the hole. Further, at least the upper side of the claw hole for interposing the elastic body is configured as an elliptical or quadrangular rotation stopping mechanism. It should be noted that the upper side of the claw hole in which the elastic body is interposed may be formed as a concave groove along the circumferential direction of the female connector. With such a configuration, the male connector can be firmly integrated by simply inserting and fitting it into the female connector with a small pressing force,
Has a perfect retaining effect. Further, the male connector can be connected to the female connector with one touch, which is useful for improving workability.

In order to reduce the pushing force at the time of connecting the male connector to the female connector, a tapered insertion guide that is inclined toward the distal end is provided at the outer peripheral portion of the distal end of the fitting shaft of the male connector. Since an end is formed and the insertion guide end is designed to be engaged with the guide taper formed on the side of each engaging claw, the insertion direction, that is, the inserting direction of the fitting shaft body of the male connector is admitted. It is possible to fit the female connector with a small pushing force.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a connecting device for a secondary structure according to the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment of a connecting device for a secondary structure according to the present invention. In the drawings, a female connector A is formed in a tubular shape, and is provided with a fitting tubular hole 2 that is opened forward at an axial center X portion and that is bored inward from the opening 1 to have substantially the same diameter. In addition, an anchor screw hole 3 communicating with the fitting cylinder hole 2 and opening rearward on the same axis X is screwed. On the outer circumference of this female connector A, radially aligned along the circumferential direction from a plurality of directions Y orthogonal to the axis X of the fitting cylindrical hole 2, as if radially aligned in the same vertical plane, A plurality of (three in the illustrated example) claw holes 4, 4 ... Opening into the fitting cylindrical hole 2 are formed. In the present embodiment, each of the nail holes 4, 4, ... Is separated into two stages in the abdomen of the inner cavity, and the upper side 4a.
Is formed in a substantially quadrangular shape, and a lower side 4b is formed below the quadrangular shape so as to be continuous as a cylinder having the same diameter as one side of the substantially quadrangular shape, and a step 4c is formed at a corner portion of the middle abdomen. Is configured.

The claw holes 4, 4 ...
After fitting the engaging claws 5, 5 into the inside thereof, the upper side 4a thereof is filled with elastic bodies 6, 6 ... Holes 4, 4 ...
The opening is closed by a lid 7 formed as a cylindrical outer cylinder to cover the female connector A from the outer peripheral direction. Thus, the engaging claws 5, 5 ... Fit into the respective claw holes 4, 4 ...
Operate such that the lower end side of the elastic bodies 6, 6 ... Is constantly projected into the fitting cylindrical hole 2. The lid 7 for covering the openings of the claw holes 4, 4 ... Does not necessarily have to be formed as a cylindrical outer cylinder.
A simple lid (not shown) that covers only the opening of 4 ...
Of course, it may be welded or adhesively fixed.

Further, as shown in FIG. 6, each of the engaging claws 5 has a cylindrical main body portion 5a which functions as a "wedge" of the female connector A and the male connector B. It is formed in a cylindrical shape so that it can be inserted into the lower side of the claw hole 4, and has a substantially same shape that can be fitted to the upper side of the claw hole 4 formed in a substantially square shape on the upper side thereof. The plywood 5b is integrally or integrally fixed. Therefore, the engaging claw 5 is
The engaging plate 5b formed on the upper part of the claw hole 4 is restricted from rotating in the direction of rotation in the shape of the inner cavity of the upper side 4a of the claw hole 4 (rotation stopping mechanism), and is formed at the four corners of the inner cavity of the claw hole 4. At the position where it engages with the step 4c portion, the downward drop is prevented (locking mechanism), and the female connector A is prevented from coming out into the fitting cylindrical hole 2.

FIGS. 7 and 8 show another embodiment of the engaging claw 5, wherein the former is one in which the engaging plate 5b fixed to the upper part of the main body 5a is formed in a substantially elliptical shape. In the illustrated example, the left and right sides of the disc-shaped engaging plate 5b are cut off in accordance with the diameter of the main body 5a to form a substantially elliptical shape. Corresponding to the engaging claws 5 formed in this way, the inner side of the claw hole 4 formed on the female connector A side is also formed with an upper side 4a and a lower side 4b so that both can be fitted. To do. In the latter, the main body portion 5a is formed in a quadrangular prism shape, imparts a rotation stopping function to the main body portion 5a itself, and has edges protruding at the front and rear ends or the left and right ends that prevent the main body portion 5a from falling into the fitting cylindrical hole 2. It has a structure in which the engagement plate 5b is formed. Main body 5a of the engaging claw 5 formed as described above
On the front side of the lower end, a guide taper 5c that is inclined rearward is formed, and at the time of connection with a male connector B to be described later, engagement by an axial pressing force on the side surface of the main body portion 5a of the engagement claw 5 is engaged. The claw 5 is configured to be easily moved up and down.

The male connector B is provided with a cylindrical fitting shaft 8 which is inserted and fitted into the fitting cylindrical hole 2 of the female connector A, and a flange 9 which is continuous to the outside thereof. Thus, the opening 1 of the fitting cylindrical hole 2 is completely connected at a position where the opening 1 comes close to or comes into contact with the flange 9. A ring-shaped claw receiving groove 10 is formed in a portion of the outer periphery of the fitting shaft body 8 in the circumferential direction corresponding to the position where the claw holes 4, 4, ... Are drilled, and the claw holes 4, 4 are formed. The guide shafts 5c, 5c of the engaging claws 5, 5 mounted on the ... are formed with tapered insertion guide ends 11 inclined toward the front end on the outer periphery of the front end of the fitting shaft body 8. The insertion guide end 11 is taper-engaged with the guide taper 5c, 5c ...
The engaging claws 5, 5 are caused by the pressing force in the axial direction (connection direction) generated by the connecting operation of the female connector A and the male connector B.
Are pushed back to the upper side 4a of the corresponding claw holes 4, 4, so that the fitting shaft body 8 is passed between the respective engaging claws 5, 5, and thereafter, in the claw receiving groove 10 from the circumferential direction. The claws 5, 5 ... Are pushed back by the pressing force of the elastic body 6 and fitted in a wedge shape so as to have a retaining action. A screw hole 1 for an anchor is provided at the rear of the male connector B on the axis X.
2 is provided.

The elastic material 6 into which the engaging claws 5, 5 ... Are inserted into the respective claw holes 4, 4 ...
Generally, it is composed of a corrosion-resistant synthetic resin such as urethane tar-based soft filler or a corrosion-resistant cushion such as a corrosion-resistant rubber, but instead of simply using a filler, a spring formed of corrosion-resistant spring steel. Alternatively, a leaf spring or the like (not shown) may be used instead. Further, according to the illustrated example, the engaging claws 5 are configured to advance and retreat in three directions on the same longitudinal plane (Y direction) along the circumferential direction of the female connector A, but the number is not necessarily three. Needless to say, it is not necessary that the number be 4 or 5, and the number can be increased or decreased within a range allowed by the structural space.

The opening 1 of the female connector A is formed with a predetermined radius that is curved in a convex shape from its inner side to the outer side (the arrow C portion), and at the same time, the male type is formed. The transitional portion (viewed by the arrow D) from the fitting shaft body 8 to which the connection body B abuts this radius corresponds to the radius on the side of the female connection body A, and the transitional portion is received and overlapped. A rounded curve is formed. Therefore, when the two are connected and integrated, they are completely closely coupled in the vicinity of the opening 1 of the female connector A, and the fitting shaft body on the side of the male connector B formed with a small diameter is formed. Shear stress is not applied to the outer peripheral portion of 8, and shear resistance can be generated in the vicinity of the collar portion 9 formed in the precinct, and the strength of the connecting device can be increased.

FIG. 9 illustrates a secondary structure K1, such as a concrete secondary product, using the secondary structure connecting device according to the present invention.
At the time of pouring concrete to be K2, the female connector A in which the anchor member 13 is connected and integrated at a predetermined position on each end face on one side, that is, on the end face of the secondary structure K1 on one side, and on the other side. The male connector B, in which the anchor members 14 are connected and integrated, is set on the end surface of the secondary structure K2 to be embedded as a whole. Thus, when the secondary structures K1, K2 are joined together, the fitting shaft body 8 of the male connection body B on the other side is fitted into the fitting cylindrical hole 2 of the female connection body A on the one side, A plurality of engaging claws 5, 5 ... Configured on the mold connecting body A side are simultaneously fitted into the claw receiving groove 10 of the male connecting body B to integrate the two by male and female coupling, and a secondary device is provided via a connecting device. The connection between the structures K1 and K2 is completed.

FIGS. 10 and 11 show a second embodiment of the secondary structure connecting device according to the present invention, and only parts different from the first embodiment will be described. In the present embodiment, the plurality of nail holes 4, 4
On the outer periphery of the female connector A in which the ... Are drilled, each claw hole 4 and a ring-shaped recessed groove 15 which is continuous with the claw hole 4 along the circumferential direction are continuously formed. Has a structure in which the bottom of the groove 15 communicates with the inside of the fitting cylindrical hole 2, and after the engaging claws 5, 5 ... Are fitted into the claw holes 4, 4 ,. The elastic body 6 is filled in the inside 15, and a cylindrical lid 7 formed in a cylindrical shape is wound from the outside. In this way, each claw hole 4, 4 ...
When it is configured to be opened from the inside into the fitting cylindrical hole 2 of the female connector A, it is not necessary to configure a special structure in the inner cavity of the claw holes 4, 4, ... Can be simplified and workability is improved.

FIGS. 12 to 14 show a third embodiment of the secondary structure connecting device according to the present invention, and only parts different from the first and second embodiments will be described. To do. In the present embodiment, instead of the ring-shaped concave groove 15 in the second embodiment,
Corresponding to the formation portions of the claw holes 4, 4, ..., Only the circumferential portion on the upper side thereof is cut out so as to be a flat surface above the claw holes 4, 4 ,. 16 are formed, and the respective claw holes 4, 4 ...
Has a structure in which the bottom portion of the
After fitting the engaging claws 5, 5 ... into the respective claw holes 4, 4 ,.
The partial recessed groove 16 is filled with the elastic body 6, and the lid 7 formed in a cylindrical shape is attached from the outside thereof. By forming such a partial groove 16, it is possible to increase the strength of the female connector A against shearing force in the longitudinal direction.

[0019]

The connecting device for the secondary structure according to the present invention comprises:
As described above, since the plurality of engaging claws are arranged in parallel on the same vertical plane along the outer peripheral direction of the female connector in the axial direction, the male connector is connected to the female connector. When the fitting shaft of the body is inserted, it fits into the claw receiving groove formed on the outer periphery at the same time from multiple directions, and these multiple engaging claws prevent the male connector from coming off from the outer periphery at the same time. Since the structure is such that it is supported, the axes of the female-type connecting body and the male-type connecting body are completely aligned with each other, and eccentric load is less likely to occur.

Further, with this structure, it is not necessary to form an engaging claw on the male connector side, so that the shaft diameter of the male connector can be reduced, and the claw receiving groove on the outer periphery can be easily processed. The workability is improved, and multiple engaging claws can be easily configured from the outside of the female connector on the same longitudinal section along the circumferential direction of the female connector, which simplifies the structure. , Enables downsizing of the connection device itself.

Further, a rotation stopping mechanism for stopping the rotation of the engaging claw fitted in the claw hole is constructed in the inner cavity of the claw hole, and the engaging claw fitted in the claw hole is fitted. Since the engaging mechanism that prevents the engaging member from falling into the fitting hole is configured, and at least the upper side of the claw hole in which the elastic body is interposed is configured as an elliptical or quadrangular rotation stopping mechanism, a male connector. Can be firmly integrated by simply inserting and fitting the female connector into the female connector with a small pressing force, and has a complete retaining function. In addition, the male connector can be connected to the female connector with a single touch, which helps improve the workability of connecting the secondary structure, and thus the effects obtained by implementing the present invention are extremely large.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing a state in which a female-type connecting body and a cylindrical male-type connecting body showing a first embodiment of a connecting device for a secondary structure according to the present invention are coupled with a male-and-female connecting body. .

FIG. 2 is also a front view of the connection device.

FIG. 3 is also a rear view of the connection device.

FIG. 4 is a vertical cross-sectional view of the connection device, taken along line YY in FIG. .

FIG. 5 is a longitudinal cross-sectional view of a main part showing a state in which a female connector and a male connector are separated.

6A and 6B show a structure of an engaging claw, where FIG. 6A is a plan view, FIG. 6B is a side view, and FIG. 6C is a front view.

7A and 7B show another embodiment relating to an engaging claw, wherein FIG. 7A is a plan view, FIG. 7B is a side view, and FIG. 7C is a front view.

FIG. 8 is a view showing still another embodiment of the engaging claw, (a) is a plan view, (b) is a side view,
(C) is a front view.

FIG. 9 is a side view showing a state in which the female type connection body and the male type connection body are connected and integrated by being embedded in a secondary structure to be connected.

FIG. 10 is a longitudinal cross-sectional view of essential parts showing a second embodiment of a connecting device for a secondary structure.

FIG. 11 is a Y-Y line in FIG. 10 also along the circumferential direction.
It is a line principal part longitudinal cross-sectional view.

FIG. 12 is a plan view showing a third embodiment of the secondary structure connecting device.

FIG. 13 is likewise a vertical cross-sectional view of a main part.

FIG. 14 is also Y-Y in FIG. 13 along the circumferential direction
FIG.

FIG. 15 is a side sectional view of a main part showing a conventional connecting device for a secondary structure.

FIG. 16 is a side sectional view of an essential part showing a state before connection of the male connector to the female connector, similarly.

FIG. 17 is a side sectional view of an essential part showing a state where connection is similarly impossible due to an eccentric load.

[Explanation of symbols]

A female connector B Male connector 1 opening 2 Fitting cylinder hole 3 Anchor screw holes 4 nail holes 4a upper side 4b lower side 4c step 5 engaging claws 5a main body 5b Engagement plate 5c Guide taper 6 elastic body 7 Lid 8 Mating shaft 9 collar part 10 claw receiving groove 11 Insertion guide end 12 Screw holes for anchors 13 Anchor member 14 Anchor member 15 Ring-shaped groove 16 partial groove K1, K1 secondary structure

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E21D 11/04

Claims (6)

(57) [Claims] 1. A connecting device which is embedded in a secondary structure that connects opposing secondary structures such as concrete products in surface contact with each other, wherein a fitting cylindrical hole for connection having a substantially equal diameter is formed in the front part. In addition, a screw hole for an anchor is provided in the rear part, and a plurality of holes are formed on the outer periphery in the radial direction along the circumferential direction in a direction orthogonal to the axis of the fitting cylinder hole, and open in the fitting cylinder hole. Claw holes are formed, the engaging claws are fitted in the claw holes, and the elastic body is interposed above the claw holes, then the outside of the claw hole is closed by the lid, and the inner tip is always biased by the elastic body. The cylindrical female connector configured to project into the fitting cylindrical hole by the above, and the respective engagements on the outer periphery of the fitting shaft body fitted in the fitting cylindrical hole of the female connector. A ring-shaped claw receiving groove is formed at a position corresponding to the claw position, and a circle is formed in the claw receiving groove beyond the tip of the fitting shaft. Configured to exert a retaining action missing each pawl fitted from the direction, and the this <br/> and consisting of a male connector of a substantially plug-like cylindrical shape having a threaded hole for anchoring the rear Characteristic dual structure connection device. 2. The device for connecting a secondary structure according to claim 1, wherein a rotation stopping mechanism for stopping the rotation of the engaging claw fitted in the claw hole is formed in the inner cavity of the claw hole. . 3. The locking mechanism for preventing the engagement claw fitted in the claw hole from dropping into the fitting shaft hole in the inner cavity of the claw hole. Secondary structure connection device. 4. The connecting device for a secondary structure according to claim 2, wherein the upper side of the claw hole for interposing an elastic member is configured as an elliptical or quadrangular rotation stopping mechanism. 5. The connecting device for a secondary structure according to claim 2, wherein the engaging claw is formed in a cylindrical shape or a prismatic shape. 6. The connection of a secondary structure according to claim 2, wherein the upper side of the claw hole for interposing an elastic body is formed as a concave groove along the circumferential direction of the female type connection body. apparatus.