JP6837417B2 - Member connection device - Google Patents

Description

The present invention relates to a member connecting device for connecting adjacent concrete members.

For example, when forming a road gutter or the like, a work is performed in which a plurality of concrete members are arranged in a straight line and the opposing ends of adjacent concrete members are connected to each other. Since the concrete members used in such applications are heavy and large, they cannot be transferred to the positions where they should be connected accurately. Therefore, it is necessary to accurately align the opposing ends of these adjacent concrete members. Required a lot of labor, labor and cost.

Therefore, the present inventor attaches a tubular hole-forming member to the end side of the side surface where the concrete members intersect the connecting surface facing each other at a substantially right angle to the side surface, and attach these hole-forming members. The fitting member is inserted into the opening of the concrete member, and the locking portion of the connecting plate is engaged with the fitting member inserted into the opening of the hole forming member attached to each of the adjacent concrete members. We are developing a member connecting device that enables adjacent concrete members to be connected to each other in a state where they are prevented from being separated by stopping them (see, for example, Patent Document 1).

Japanese Patent No. 408907 (Page 4, Fig. 8)

When connecting concrete members to each other using a connecting plate, it is necessary to bury a hole forming member in advance on the end side of the side surface that intersects the connecting surface of the adjacent concrete member. In the case, since the hole forming member is composed of a metal member having both ends opened, if the hole forming member is to be embedded at the stage of manufacturing the concrete member, it is hardened from the concrete side of the hole forming member. The previous concrete milk invades the inside of the hole forming member. According to this, there is a possibility that the concrete in which the concrete milk before hardening has invaded the inside of the hole forming member is hardened, and the insertion accuracy of the inserting member into the hole forming member is lowered. When the fitting member cannot be fitted into the hole forming member with high accuracy, there arises a problem that not only the concrete members by the member connecting device cannot be connected with high connection accuracy but also the connection strength cannot be maintained.

The present invention has been made by paying attention to such a problem, and an object of the present invention is to provide a member connecting device capable of accurately fitting an insertion member into a hole forming member.

In order to solve the above problems, the member connecting device of the present invention is used.
A member connecting device that connects adjacent concrete members to each other.
A hole-forming member that is embedded and attached to the side surface of the concrete member that intersects the connecting surface where the concrete members face each other at a substantially right angle to the side surface and has an opening at one end in the longitudinal direction.
An insertion member to be inserted into the opening of the hole forming member, and
A connection plate having a locking portion that is respectively inserted into the opening of the hole-forming member attached to the adjacent concrete member and locked to the insertion member is provided.
The hole forming member is constituted by a cylindrical member extending longitudinally therethrough, having the opening in the one longitudinal end of the tubular member, the inner peripheral surface of the other longitudinal end is engaged Wataru reset the entire circumference It is characterized by being closed.
According to this feature, the locking portions of the connecting plates are locked to the fitting members inserted into the openings of the hole forming members attached to the adjacent members, respectively, thereby being made of adjacent concrete. The members are connected in a state where they are prevented from being separated from each other. Moreover, since the hole forming member is an inner peripheral surface of the other longitudinal end of the metallic tubular member is constructed is engaged Wataru reset the entire circumference, the hole forming member at the time to be embedded in the concrete member, curing It is possible to prevent the previous concrete milk from entering the inside of the hole-forming member, and the insertion member can be inserted into the hole-forming member with high accuracy, and by extension, the concrete members are connected to each other with high connection accuracy by the member connecting device. can do.

The fitting member is formed so that the outer diameter on one side in the longitudinal direction is substantially the same as the inner diameter of the opening of the hole forming member, and the outer diameter on the other side in the longitudinal direction is larger than the outer diameter on one side in the longitudinal direction. It is characterized by being formed in a small diameter.
According to this feature, since the outer diameter of the fitting member on the other side in the longitudinal direction is smaller than the inner diameter of the opening of the hole forming member, it is easy to insert and the outer peripheral surface on one side in the longitudinal direction is the hole forming member. It can be accurately held on the inner peripheral surface of the opening.

The other end in the longitudinal direction of the tubular member that penetrates the hole-forming member in the longitudinal direction is a deformed portion that is pressed and deformed from the outside. It is characterized in that at least a part of the tip end portion of the other end portion in the direction and the deformed portion come into contact with each other.
According to this feature, the tip portion in the longitudinal direction of the fitting member abuts on the deformed portion, so that the number of contact points between the fitting member and the hole forming member can be increased and the fitting member can be accurately held. As a result, concrete members can be connected to each other with high connection accuracy by the member connecting device.

The other longitudinal end of said tubular member extending longitudinally therethrough constituting the hole forming member is pressed and deformed from the outside in the shape of a flat plate, the inner circumferential surface of the other longitudinal end is engaged against each other over the entire circumference It is characterized in that it constitutes a flat plate portion.
According to this feature, the flat plate portion functions as a rotation stopper in the concrete member of the hole forming member, and the fixing strength between the hole forming member and the concrete member can be increased.

The tubular member that penetrates the hole-forming member in the longitudinal direction is characterized in that a slit that cuts the flat plate portion in the thickness direction is formed in the flat plate portion at the other end in the longitudinal direction.
According to this feature, when the tip of the other end of the fitting member in the longitudinal direction and the deformed portion partially come into contact with each other, the flat plate portion is deformed so as to be slightly expanded outward by the slit to form a hole. The effect of preventing the members from coming off can be improved.

It is a front view which shows the member connection apparatus in Example 1. FIG. It is a figure which shows the hole forming member, (a) is the arrow view seen from the opening side, and (b) is the arrow view seen from the flat plate part side. (A) is a side sectional view showing a hole forming member, (b) is a sectional view taken along the line AA of FIG. 3 (a), and (c) is a sectional view taken along the line BB of FIG. 3 (a). It is a figure. It is a perspective view which shows the insertion member. It is a figure which shows the state which the insertion member is temporarily fixed to a hole forming member. It is a figure which shows the state which the hole forming member is embedded in the concrete member. It is a figure which shows the state which the insertion member is finally fixed to the hole forming member. It is a figure which shows the state which inserted the insertion member into a hole forming member with a margin to use a connection jig. It is a figure which shows the state before the concrete members are brought close to each other by using a connecting jig. It is a figure which shows the state which the connection plate is engaged with both insertion members. (A) is a perspective view showing a hole forming member in Example 2, and (b) is a sectional view taken along the line CC of FIG. 11 (a). It is a figure which shows the state which the flat plate part of the hole forming member is expanded.

A mode for carrying out the member connecting device according to the present invention will be described below based on examples.

The member connecting device according to the first embodiment will be described with reference to FIGS. 1 to 10.

Reference numeral 1 in FIG. 1 is a member connecting device to which the present invention is applied. The member connecting device 1 is provided on the end side of the side surfaces 30b and 30b'that intersect the connecting surfaces 30a and 30a'that the concrete members 30 and 30'face each other, respectively, at a substantially right angle to these side surfaces 30b and 30b'. Hole-forming members 2 and 2'(see FIG. 1) to be embedded and attached, and insertion members 3 and 3'to be inserted into the openings 2a (see FIG. 2) of each hole-forming member 2 described later. , A connecting plate 4 having locking portions 4a and 4b, which are locked to the fitting members 3 and 3', respectively.

As shown in FIG. 1, the connecting plate 4 is formed in a substantially rectangular shape, one locking portion 4a is formed by a hole, and the other locking portion 4b is formed by a notch that opens downward. Further, a bent piece 18 projecting toward the front side is formed at the upper end portion of the connecting plate 4, and the strength of the connecting plate 4 is enhanced by the bent piece 18.

As shown in FIGS. 2A and 2B, the hole forming member 2 is composed of a substantially tubular metal tubular member penetrating in the longitudinal direction, and is formed at one end in the longitudinal direction of the metal tubular member. It has an opening 2a, and the other end side in the longitudinal direction is crushed by a press to form a flat plate portion 2f. In the flat plate portion 2f, the inner peripheral surface 2b of the end edge of the metallic tubular member is closed is engaged Wataru reset the entire circumference. Further, a flexible synthetic resin retaining piece 5 is attached to one end of the metal tubular member in the longitudinal direction.

As shown in FIG. 3A, the retaining piece 5 has a substantially L-shaped cross-sectional view that covers the opening 2a from the end surface 2c to the outer peripheral surface 2d, and the free end portion on the end surface 2c side is an opening. An annular piece 6 extending in the inner diameter direction from the inner peripheral surface 2e of the portion 2a is formed.

Further, as shown in FIG. 3B, the inner peripheral shape of the opening 2a side, which is one side in the longitudinal direction, is a shape that follows the outer peripheral shape of the circular rod-shaped fitting member 3 (hereinafter,). , This portion is referred to as a circular portion 7), and the other end side in the longitudinal direction is crushed by a press as described above as shown in FIG. 3C, so that the internal space is deformed. (Hereinafter, this portion is referred to as a deformed portion 8).

As shown in FIG. 4, the fitting member 3 has a bolt shape, and is composed of a body portion 9 on which a male screw is formed and a bolt head 10. The body 9 includes a first body 11 on the bolt head 10 side and a second body 12 on the tip side, and the outer diameter of the first body 11 is larger than the outer diameter of the second body 12. Is formed in.

Further, the outer diameter of the first body portion 11 is larger than the inner diameter of the annular piece 6 of the hole forming member 2, and the outer diameter of the second body portion 12 is the annular piece 6 of the hole forming member 2. The diameter is smaller than the inner diameter. Therefore, when the insertion member 3 is inserted into the hole forming member 2, the second body portion 12 passes through the inside of the annular piece 6 and is smoothly inserted into the hole forming member 2, but the first body portion 11 is annular. It comes into contact with the piece 6 and is difficult to insert, and as shown in FIG. 5, a part of the first body portion 11 is temporarily fixed in a protruding state at a stage before the main fixing described later. According to this, the insertion member 3 can be aligned with the hole forming member 2, and the subsequent insertion work can be easily performed.

Subsequently, a mode in which adjacent concrete members 30, 30'are connected to each other by using the member connecting device 1 will be described with reference to FIGS. 6 to 10.

The hole forming member 2 is arranged in advance at a predetermined position in the concrete milk before hardening in the manufacturing stage of the concrete member 30, and is buried in a state where the opening 2a and the retaining piece 5 are exposed to the outside (FIG. 6). reference). At this time, the hole forming member 2, since the inner circumferential surface 2b is formed is engaged against each other over the entire circumference at the flat plate portion 2f of the other longitudinal end of the metallic tubular members, prior to curing the concrete milk It is possible to prevent the hole forming member 2 from invading the inside of the hole forming member 2.

Further, as shown in FIG. 6, the hole forming member 2 is embedded in the concrete member 30 so that the flat plate portion 2f is substantially parallel to the facing surface 30a of the concrete member 30. According to this, in the proximity work in which the concrete member 30 and the concrete member 30'described later are brought close to each other, the force acting on the hole forming member 2 can be received on the surface of the flat plate portion 2f, and the hole forming member 2 can be received. It can be auxiliaryly prevented from coming off.

Subsequently, although not shown here, the formed concrete member 30 is lifted by a crane or the like, transferred to an installation location to be connected, and with respect to the connection surface 30a'of the already installed concrete member 30'. Temporarily place the lifted concrete member 30 with the connection surfaces 30a facing each other.

Next, the insertion member 3 is inserted into each hole forming member 2. As shown in FIG. 1, since one locking portion 4a of the connecting plate 4 is composed of holes, the locking portion 4a is previously aligned with the hole forming member 2 and is interposed through the locking portion 4a. The insertion member 3 is inserted into the hole forming member 2, and the connecting plate 4 is pivotally supported by the hole forming member 2 on the one side of the concrete member 30.

Further, as shown in FIG. 7, the outer diameter of the first body portion 11 is formed to be substantially the same as the inner diameter of the circular portion 7 of the hole forming member 2. Further, the second body portion 12 is formed in a tapered shape from the base end portion, which is the boundary with the first body portion 11, toward the tip end side, and a part of the second body portion 12 is one of the deformed portions 8. It has an outer diameter that comes into contact with the part.

Further, the dimension of the first body portion 11 in the longitudinal direction is such that the insertion member 3 is in a state where the bolt head 10 of the insertion member 3 is in contact with the other surface of the connection plate 4 in which one surface is in contact with the retaining piece 5. Is sized so that the first body portion 11 fits within the circular portion 7 in a state where the head is inserted into the hole forming member 2. On the other hand, the dimensions of the second body portion 12 in the longitudinal direction are similarly inserted until the bolt head 10 of the fitting member 3 is in contact with the other surface of the connection plate 4 in which one surface is in contact with the retaining piece 5. The size is such that a part of the second body portion 12 comes into contact with a part of the deformed portion 8 in a state where the member 3 is inserted into the hole forming member 2.

The insertion member 3 is first temporarily fixed to the hole forming member 2 with a part of the first body portion 11 protruding, and then by an external force such as hitting the bolt head 10 with a hammer or rotating it with a spanner. Proceed with insertion (fixed). Due to this external force, a plurality of threads of the first body portion 11 of the fitting member 3 exceed the annular piece 6, and the first body portion 11 is irremovably inserted into the circular portion 7 of the hole forming member 2 (FIG. 8).

In this fixing, as shown in FIG. 8, a connection jig 13 (see FIG. 9), which will be described later, is located between the other surface of the connection plate 4 in which one surface is in contact with the retaining piece 5 and the bolt head 10. The insertion member 3 is inserted into the hole forming member 2 until the thickness of) is left, and at this time, the second body portion 12 is not in contact with the deformed portion 8.

In the connection work between the concrete member 30 and the concrete member 30', as shown in FIG. 1, first, the locking portion 4b of the connection plate 4 pivotally supported by the insertion member 3 on the one side of the concrete member 30 side. The lower surface 4c at the end on the side is supported by the fitting member 3'on the other concrete member 30'(temporary erection state).

Subsequently, the connection jig 13 (see FIG. 9) is used to perform a proximity operation in which the concrete member 30 and the concrete member 30'are brought close to each other via the insertion member 3 and the insertion member 3'.

Here, the configuration of the connection jig 13 will be described. As shown in FIG. 9, the connecting jig 13 includes a jig main body 14, an operating plate 15, and an operating rod 16. The jig body 14 has a substantially rectangular shape, and a concave groove-shaped locking portion 14a that is locked to the fitting member 3 on the one side of the concrete member 30 is formed on one end side in the longitudinal direction thereof. A shaft support portion 14b that rotatably supports one end of the operating plate 15 is formed on the end side.

As shown in the figure, the operating plate 15 has a rectangular shape and is fixed to the operating rod 16. Further, one end side in the longitudinal direction is rotatably supported with the other end of the jig body 14, and the other end side is opened to the other end side in the longitudinal direction, and the other fitting member 3'on the concrete member 30'side. A hooking recess 17 that engages with is formed.

Return to the explanation of proximity work. First, as shown in FIG. 9, the fitting member 3 on the one side of the concrete member 30 is locked to the locking portion 14a of the jig main body 14. Next, the fitting member 3'on the other concrete member 30'side is engaged with the engaging recess 17 of the operating plate 15. Then, in this state, the operation rod 16 is rotated downward (in FIG. 9, it is rotated clockwise toward the figure).

As a result, the operating plate 15 rotates about the engaging portion between the engaging recess 17 and the fitting member 3'as a rotation axis, and as a result, the jig body 14 moves in the direction of the fitting member 3'on the other concrete member 30'side. The insertion member 3 and the insertion member 3'are brought close to each other.

Then, the insertion member 3 and the insertion member 3'are brought close to each other until the distance between the insertion member 3 and the insertion member 3'matches the distance between the locking portion 4a and the locking portion 4b of the connecting plate 4. Then, the connecting plate 4 rotates downward due to its own weight with the fitting member 3 on the one side of the concrete member 30 as the rotation axis, and as shown in FIG. 10, the locking portion 4b is the other concrete member 30. Engage with the'side fitting member 3'. As a result, the concrete members 30, 30'are connected. By hitting the bent piece 18 with a hammer or the like, the locking portion 4b can be increased and fixed to the fitting member 3'on the concrete member 30'side.

An elastic packing material 19 is interposed between the connecting surfaces 30a and 30a'of the adjacent concrete members 30 and 30', and the packing material 19 is connected when the concrete members 30 and 30'are connected. It will be pinched and a connection with higher adhesion will be obtained.

After the concrete members 30 and 30'are completely connected by the connecting plate 4, the connecting jig 13 is removed and the proximity work is completed.

Finally, by an external force such as hitting the bolt head 10 with a hammer or rotating it with a spanner, the bolt head 10 is inserted until the other surface of the connection plate 4 with one surface of the retaining piece 5 abuts with the bolt head 10. Further fixing work is performed to advance the insertion of the member 3 into the hole forming member 2. As a result, the second body portion 12 is partially pressed against the deformed portion 8, and the fixing strength between the hole forming member 2 and the fitting member 3 can be increased.

Next, the member connecting device according to the second embodiment will be described with reference to FIGS. 11 and 12. It should be noted that the description of the same configuration as that of the above embodiment and the overlapping configuration will be omitted.

As shown in FIG. 11A, a slit 21 is formed in the flat plate portion 20f of the hole forming member 20. The slit 21 is formed by being cut by press working, and as shown in FIG. 11B, in a natural state, the slits 21 are formed and the cut surfaces 20a and 20a facing each other are in contact with each other to form a hole. The flat plate portion 20f side of the member 20 is in a substantially sealed state.

Further, although not described in detail here, in the present embodiment, the tip portion of the second body portion 12 of the fitting member 3 is pressure-welded to the deformed portion 8 (see FIG. 7) during the above-mentioned additional fixing operation. It is in a dimensional relationship with the hole forming member 20 such that the flat plate portion 20f is expanded so that the inner peripheral surfaces 2b and 2b constituting the flat plate portion 20f are separated from each other. Therefore, as shown in FIG. 12, as the flat plate portion 20f is expanded, the slit 21 is also expanded so as to form the slit 21 so that the opposing cut surfaces 20a and 20a are separated from each other.

According to this, the portion forming the flat plate portion 20f bites into the embedded concrete member 30, and the effect of the hole forming member 20 on the concrete member 30 can be improved. In addition, in order to surely prevent the intrusion of concrete milk, instead of the slit 21, a groove-shaped notch that does not penetrate the front and back is made, and the notch is used as a trigger when the insertion member 3 is inserted to expand the flat plate portion 20f. It may be an open configuration.

Although examples of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these examples, and any changes or additions within the scope of the gist of the present invention are included in the present invention. Is done.

For example, the end of the hole forming member 2 on the opposite side of the opening 2a is not limited to a flat plate unless it has a perfect circular shape, if it can be kept substantially sealed so that concrete milk does not enter, for example, a substantially triangular shape or abbreviated. It may be star-shaped or the like.

Further, the fitting member 3 is not limited to the one made of a metal tubular member having a substantially cylindrical shape, and may be made of, for example, a substantially rectangular tubular member. In this case, the opening of the hole forming member 2 By making the inner peripheral shape on the portion 2a side correspond to the outer peripheral shape of the fitting member 3, the above-mentioned effect can be similarly obtained.

Further, as long as the fitting member 3 and the hole forming member 2 are inserted so as not to be detached, the male screw may not be formed on the body portion of the fitting member 3.

Further, the body portion of the fitting member 3 may have the same outer diameter on the bolt head 10 side and the outer diameter on the tip side. In this case, although the insertion efficiency at the time of temporary fixing is lowered, the stress at the time of pressure contact between the tip portion of the inserting member 3 and the deformed portion 8 at the time of additional fixing is increased.

Further, in the above embodiment, the second body portion 12 of the fitting member 3 has been described with a configuration in which the second body portion 12 is formed in a tapered shape from the base end portion, which is the boundary with the first body portion 11, toward the tip end side. However, it may be configured with a constant outer diameter dimension smaller than the outer diameter of the first body portion 11.

Further, in the above embodiment, the outer diameter of the second body portion 12 of the insertion member 3 has been described as being smaller than the inner diameter of the annular piece 6 of the hole forming member 2, but the present invention is not limited to this. By making the inner diameter of the annular piece 6 of the forming member 2 smaller than the outer diameter of at least a part of the second body portion 12, the first body portion 11 is inserted in the state before being inserted into the annular piece 6. The fitting member 3 can be temporarily held in a state of being axially aligned with the hole forming member 2.

1 Member connection device 2 Hole forming member 2a Opening 2b Inner peripheral surface 2f Flat plate part 3 Inserting member 4 Connection plate 5 Retaining piece 6 Circular piece 7 Circular part 8 Deformed part 9 Body part 10 Bolt head 11 First body part 12 Second body 13 Connection jig 19 Packing material 20 Hole forming member 20a Cut surface 20f Flat plate part 21 Slit 30 Concrete member 30a Connection surface 30b Side surface

Claims (5)

A member connecting device that connects adjacent concrete members to each other.
A hole-forming member that is embedded and attached to the side surface of the concrete member that intersects the connecting surface where the concrete members face each other at a substantially right angle to the side surface and has an opening at one end in the longitudinal direction.
An insertion member to be inserted into the opening of the hole forming member, and
A connection plate having a locking portion that is respectively inserted into the opening of the hole-forming member attached to the adjacent concrete member and locked to the insertion member is provided.
The hole forming member is constituted by a cylindrical member extending longitudinally therethrough, having the opening in the one longitudinal end of the tubular member, the inner peripheral surface of the other longitudinal end is engaged Wataru reset the entire circumference A member connecting device characterized by being closed. The fitting member is formed so that the outer diameter on one side in the longitudinal direction is substantially the same as the inner diameter of the opening of the hole forming member, and the outer diameter on the other side in the longitudinal direction is larger than the outer diameter on one side in the longitudinal direction. The member connecting device according to claim 1, wherein the member connecting device is formed to have a small diameter. The other end in the longitudinal direction of the tubular member that penetrates the hole-forming member in the longitudinal direction is a deformed portion that is pressed and deformed from the outside. The member connecting device according to claim 1 or 2, wherein the tip end portion of the other end portion in the direction and the deformed portion come into contact with each other at least in part. The other longitudinal end of said tubular member extending longitudinally therethrough constituting the hole forming member is pressed and deformed from the outside in the shape of a flat plate, the inner circumferential surface of the other longitudinal end is engaged against each other over the entire circumference The member connecting device according to claim 3, wherein the flat plate portion is formed. 4. The fourth aspect of the present invention is characterized in that a slit for cutting the flat plate portion in the thickness direction is formed in the flat plate portion at the other end in the longitudinal direction of the tubular member that penetrates the hole forming member in the longitudinal direction. The member connecting device according to the description.

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