JPH081843Y2 - Fastening device for rail mounting brackets for concrete sleeper formwork - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastening device for a rail mounting bracket embedded in a concrete sleeper to a frame.

[0002]

2. Description of the Related Art The above-mentioned rail mounting metal fitting has an anchor portion embedded in a concrete sleeper, an abutting portion for contacting an upper surface of a bottom plate portion of a concrete sleeper frame, and an insertion hole for inserting a rail retainer. In a concrete sleeper that supports one rail, two pairs of the rail mounting brackets are embedded in the concrete sleepers, and in a concrete sleeper that supports two rails, two pairs of the rail mounting brackets. 2 sets are embedded in concrete sleepers.

The embedding of the rail mounting member in the concrete sleeper is performed as follows, for example. That is, while forming an opening in the bottom plate part of the formwork for concrete sleepers, the rail mounting metal fitting in which the rail retainer insertion hole is formed, with a part of it being in contact with the top surface of the bottom plate part, and the rail Insert the presser tool insertion hole into the opening with the hole projecting below the bottom plate, and fasten this rail mounting bracket to the form by a fastening device located below the form, and also anchor the rail mounting bracket. This is done by placing concrete in the formwork so as to fill the part.

An example of a device for fastening the rail mounting bracket to the opening of the mold is, for example, Japanese Utility Model Laid-Open No. 60-1821.
The one shown in Japanese Patent No. 13 has been proposed. In this fastening device, an opening is formed in a bottom plate portion of a concrete sleeper frame, and a plurality of vertically rotatable pieces are opposed to each other so as to face the opening. It is provided on the lower side, and a concave portion is provided at the tip end portion of the rotating piece that faces each other.
Further, a spring member capable of urging the rotating piece in the circumferential direction of the rotating shaft is provided.

According to the above construction, the rail mounting member is engaged with the recess through the opening while the recess at the tip of the rotating piece is biased and held upward by the spring member, and then the rail mounting member is pushed in. Then, by rotating the rotating piece downward by this pushing force and reversing the biasing direction of the spring member beyond the dead point, the rail mounting bracket can be easily fastened to the form, The fastening release of the rail mounting bracket can be easily achieved by pulling out the rail mounting bracket.

[0006]

However, in the fastening device having such a structure, the space for rotating the rotating piece and the biasing direction of the spring member are reversed on both sides of the opening in the lower part of the mold. It is necessary to secure a space for this, and there is a problem in that the device becomes large.

Further, because of the structure in which the biasing direction of the spring member is switched by the turning of the turning piece by a slight angle, the form frame receives a strong shock, or the turning piece itself receives a strong shock. In this case, the biasing direction of the spring member and the direction of the rotating piece may be reversed in an instant.

If this reversal occurs when pouring concrete, the rail mounting bracket will rise and be displaced, so it is necessary to set it again, but this requires wasteful work and time to remove the concrete. If the direction of the rotating piece is reversed before setting the rail mounting bracket, it is extremely difficult to return it to the original position against the strong urging force of the spring. It was necessary to prepare tools and equipment.

The present invention has been made in view of the above circumstances, and the fastening and releasing of the rail mounting metal fitting to the mold frame opening portion can be easily performed as in the prior art, while the above-mentioned construction is performed. An object of the present invention is to provide a fastening device for a rail mounting bracket that can avoid inconvenience.

[0010]

In order to achieve the above object, the present invention provides a rail mounting bracket having a rail retainer insertion hole formed in an opening formed in a bottom plate of a concrete sleeper formwork. In order to fasten the rail mounting bracket to the form, insert the rail retainer insertion hole with a part of it in contact with the top surface of the bottom plate and project the rail retainer insertion hole below the bottom plate. In the fastening device for rail mounting metal fittings described above, a tubular member, an engagement member that is slidably fitted in the tubular member in a slidable state, and an engaging portion of the engaging member that is internally provided in the tubular member is provided at an end of the tubular member. Two urging engagement members each having a spring for urging and projecting from the portion are urged to engage with the lower side of both ends of the insertion hole of the rail mounting member inserted in the opening. The bottom of the bottom plate so that they face each other on both sides of the opening. It is placed, configured Then co so as to conclude the rail mounting bracket into a mold by urging downward
The spring, the fastening is a concrete sleeper
The feature is that the spring force is set so that it is released by demolding .

[0011]

According to the above characteristic structure, the rail mounting member is pushed into the opening from the inner side of the mold against the biasing force of the spring, and the rail mounting member is urged to both sides of the rail retainer insertion hole. The one-touch operation of engaging the engaging portion of the engaging member easily achieves the fastening of the rail mounting bracket to the mold opening, and the biasing force of the spring acts downward on the rail mounting bracket. Therefore, the rail mounting member is securely fastened to the mold frame opening without rattling.

On the other hand, by pulling up the rail mounting member against the biasing force of the spring, the fastening of the rail mounting member with respect to the frame opening can be easily released. That is, when the concrete sleepers are released from the mold after predetermined curing, the fastening of the rail mounting bracket is automatically released accordingly, and the operation of releasing the fastening to the fastening device is not required. By removing the molded product from the mold, it is possible to obtain a concrete sleeper in which the rail mounting bracket is embedded at a predetermined position.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an apparatus for manufacturing a plurality of concrete sleepers, 1 is a frame, 2 is an upper frame 1a of the frame 1.
A plurality of concrete sleeper forms 2 are erected in a row, and a plurality of them are arranged side by side in the width direction.

As shown in FIG. 2, in the concrete sleeper formwork 2, side plate portions 4 and 4 are erected continuously on both sides in the width direction of the bottom plate portion 3 and the lengths of these plate portions 3, 4 and 4 are long. End face plate portions 5 are continuously provided on both ends in the direction (only one end is shown),
Also, the unbonded P for introducing stress to the end plate 5
C steel wire a ...
Sets) openings 6 and 6, and said end face plate portion 5
A flange 7 for erection is provided on the upper edges of the side plates 4 and 4. In the figure, 8 and 8 are seal members attached to three sides of the openings 6 and 6.

Returning to FIG. 1 and in FIG. 2, 9 is a rail mounting member, and this rail mounting member 9 is the anchor portion 1.
0, an abutting portion 11 that abuts the upper surface of the bottom plate portion 3 around the opening 6 of the concrete sleeper form 2, and an insertion hole portion 12 in which a rail retainer insertion hole b is formed. The insertion hole 12 is inserted into the openings 6 and 6 from the inside of the mold with 11 being in contact with the upper surface of the bottom plate 3. It should be noted that the hole axis Q of the rail retainer insertion hole b is configured to extend in the width direction of the mold 2 while the rail mounting member 9 is inserted into the two openings 6 and 6.

Reference numeral 13 is a fastening device for the rail mounting bracket 9 to the form 2, and more specifically, as shown in FIG. 3, it has a spherical shape having a spherical engaging portion c that engages with the end of the insertion hole b. The engaging member 14 is slidably fitted into the tubular member 15 in a retaining state, and the coil-shaped spring 16 for biasing and projecting the engaging portion c from the end of the tubular member 15 is provided. A male screw member 17 for adjusting the elastic deformation of the spring 16 is screwed into the tubular member 15 to form an urging engaging member 18, and the urging engaging member 18 is formed. 2 of the engaging portion c and the opening 6
Face each other on both sides of the opening 6 while facing each other,
It is arranged below the bottom plate portion 3 via a holder 23.

Here, in a state in which the rail mounting member 9 is fastened to the opening 6 of the mold 2 in a predetermined manner, the dimension from the bottom surface of the mold to the slide axis P of the engaging members 14 and 14 is as described above. The size of the engaging member 14 is set to be slightly larger than the dimension from the bottom of the frame to the hole axis Q of the rail retainer insertion hole b, and is set to be slightly smaller than the inner diameter of the insertion hole b. are doing. Further, the corner portion of the insertion hole b is processed into a curved surface.

According to the above structure, when the rail mounting member 9 is pushed into the opening 6 from the inside of the mold 2, the insertion hole 12 of the rail mounting member 9 is engaged with the engaging portion c of the engaging member 14. To the engaging member 14, which receives the pressing force.
When the rail 14 is moved inward of the tubular member 15 against the urging force of the spring 16 and the rail mounting member 9 is further pushed, the engaging members 14, 1 are generated based on the urging force of the spring 16.
The engaging portions c, c of 4 are biased and engaged with both sides of the insertion hole b.

At this time, the slide axis P of the engaging member 14
Since the dimensional relationship between the rail holding member insertion hole b and the hole axis Q of the rail holding member insertion hole b is set as described above, the engaging portion c of the spherical engaging member 14 is a curved edge on the lower edge side of the rail holding member insertion hole b. The spring 16 is urged and locked to the portion, and thus the spring 16
Is elastically deformed, even if there is a manufacturing error of the rail mounting member 9 or a distortion of the form 2, the wedge action is generated between the curved corner portion of the insertion hole b and the engaging portion c. The rail mounting member 9 is surely biased and projected below the mold 2.

That is, the one-touch operation of pushing the rail mounting member 9 into the opening 6 can firmly fasten the rail mounting member 9 to the opening 6 of the mold 2 without rattling.

On the other hand, by pulling up the rail mounting bracket 9 against the urging force of the spring 16, the fastening of the rail mounting bracket 9 to the concrete sleeper formwork 2 is automatically released, which will be described later. It is possible to easily remove the concrete sleepers from the formwork 2.

That is, the rail retainer insertion hole b is locked to the urging engagement member 18 so that the rail mounting member 9 is fastened to each opening 6 of the form 2, and the end face plate 5 is unbonded PC. Steel wires a ... are stretched, concrete is placed in the form 2, vibration is applied to the frame 1 if necessary, and the end face plate portion 5 is separated after hardening of the concrete. When the concrete molded product is released from the mold, the engaging portion c of the spherical engaging member 14 is disengaged from the insertion hole b, and the fastening of the rail mounting bracket 9 to the concrete sleeper frame 2 is automatically released. As a result, as shown in FIGS. 4 and 5, a concrete sleeper 19 in which the rail mounting member 9 is embedded at a predetermined position is manufactured.

Then, the rail 20 is arranged between the rail mounting members 9, 9, the rail retainers 21 are positioned on both sides of the flange portion d of the rail 20, and the rail retainers 21 are pressed. The rail 20 is laid by mounting the rail retainer 22 in the insertion hole b of the rail mounting member 9. In addition, the engaging member 1
Although the embodiment in which 5 is spherical and the engaging portion c is spherical is adopted, the engaging portion c can be implemented in a conical surface or a tapered surface.

[0024]

As described above, according to the fastening device of the rail mounting bracket for the concrete sleeper formwork of the present invention, rattling is not caused by the one-touch pushing operation of the rail mounting bracket into the mold opening. Thus, the rail mounting bracket can be fastened to the opening of the frame very easily and firmly, and the fastening can be released automatically by demolding the concrete sleepers.

The main constitution of the fastening device is that the tubular member, the engaging member that is slidably fitted in the tubular member in a retaining state, and the engaging portion of the engaging member that is internally provided in the tubular member. It comprises two biasing engagement members each having a spring for biasing and projecting from the end portion of the member. The biasing engagement members are compact and, for example, in a space other than the space for disposing the biasing engagement members. Since no space is required for movement, the whole fastening device can be compactly assembled.

Moreover, since this biasing engagement member has no element for changing the posture due to shock, if the rail mounting metal fitting is reset with wasteful time and time for removing concrete as in the conventional case. The inconveniences mentioned above did not occur at all, and as a whole, rational improvements made it possible to eliminate the conventional defects.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a concrete sleeper manufacturing apparatus.

FIG. 2 is a perspective view showing a part of a concrete sleeper formwork and a rail mounting bracket.

FIG. 3 is a cross-sectional plan view showing a main part of the fastening device.

FIG. 4 is a vertical sectional side view showing a main part of the fastening device.

FIG. 5 is a sectional view of a concrete sleeper.

[Explanation of symbols]

2 ... Concrete sleeper formwork, 3 ... Bottom plate part, 6 ... Opening part, 9 ... Rail mounting metal fitting, 14 ... Engaging member, 15 ... Cylindrical member, 16 ... Spring, 18 ... Energizing engaging member, b ... Rail Presser foot insertion hole, c ... Engagement part.

Claims (1)

[Scope of utility model registration request] 1. A rail mounting member having a rail retainer insertion hole formed in an opening formed in a bottom plate portion of a concrete sleeper formwork, a part of which is brought into contact with an upper surface of the bottom plate portion, and the rail. A rail attachment metal fitting fastening device for inserting a holding tool insertion hole in a state of protruding downward from a bottom plate portion, and fastening the rail attachment metal fitting to the formwork,
A tubular member; an engagement member slidably fitted in the tubular member in a retaining state; and a spring built into the tubular member for biasing and projecting an engaging portion of the engaging member from an end of the tubular member. The two urging engagement members provided are relatively opposed to both sides of the opening so that the engagement portions urgely engage with the lower portions of both ends of the insertion holes of the rail mounting member inserted into the opening. It is arranged below the bottom plate portion so that the rail mounting bracket is biased downward to be fastened to the formwork, and
Detaching the spring from the concrete sleepers
A device for fastening rail mounting brackets to a formwork for concrete sleepers, characterized in that the spring force is set so as to be released by .