JPH0541849Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fastening device for a formwork of a rail mounting fitting embedded in a concrete sleeper.

[Conventional technology]

The above-mentioned rail mounting bracket is equipped with an anchor part, a contact part against the inner surface of the formwork, and an insertion hole for inserting the rail holding tool. In the case of a concrete sleeper in which two pairs of metal fittings are buried in a concrete sleeper to support two rails, two pairs of two metal fittings are buried in the concrete sleeper to support two rails.
The sets are buried in concrete sleepers.

When embedding such rail mounting fittings in concrete sleepers, conventionally, in order to fasten the rail fittings to the concrete sleeper formwork, as shown in FIG. 7, a plurality of concrete sleeper formworks 31... They are arranged in parallel in the width direction at intervals, and are formed in two longitudinally adjacent openings 33 (only one is shown in the drawing) formed in each bottom plate part 32 of the formwork 31. , each rail mounting bracket 34
The rail holding tool insertion hole 35 is inserted into the formwork with it protruding downward, and the rotary operation shaft 37, which is equipped with an eccentric cam body 36 at a position corresponding to both sides of the rail mounting bracket 34, is inserted into the formwork 31. By inserting it into the rail presser insertion holes 35 of the rail mounting brackets 34 groups adjacent in the width direction and rotating the operating shaft 37,
The rail mounting bracket 34 is fastened to the formwork 31 in a state where it is biased and protruded downward from the formwork by a cam action that uses the lower surface of the formwork as a point of reaction force. Although not shown, there is also one in which each formwork 31 is equipped with one short rotary operation shaft 37 equipped with an eccentric cam body 36, so that concrete sleepers can be formed one by one.

The openings 33 are provided in a pair of two in the formwork for concrete sleepers for one rail, and two in a pair in the formwork for concrete sleepers for two rails. The following explanation will focus on a formwork for two rails.

[The problem that the idea attempts to solve]

According to the above configuration, with the rail mounting bracket 34 set from above the formwork 31, the operating shaft 37 is connected to the rail mounting bracket 34 from the lateral side of the formwork 31.
The operation of inserting the tube into the insertion hole 35 was troublesome, and the workability was poor.

In particular, as shown in the figure, four forms are set in the formwork 31 for concrete sleepers in the longitudinal direction.
In a fastening device that urges and holds the rail mounting brackets 34 of the four sets against the formwork 31 at once, the long operation shaft 37 is inserted into the insertion hole of the four rail mounting brackets 34 groups. 35... is extremely troublesome, and the long operating shaft 57...
It requires a large operation space to insert and remove the
Moreover, manufacturing errors in the rail mounting bracket 34 and formwork 3
1, each of the plurality of rail mounting brackets 34 may be fixed to the formwork 31 as specified without wobbling due to distortion etc.
There was room for improvement in that it was difficult to maintain the bias and the reliability of fastening the rail mounting bracket was lacking.

An object of the present invention is to provide a fastening device for a rail mounting bracket that is useful in terms of use and eliminates the above-mentioned conventional drawbacks.

[Means to solve the problem]

The technical measures taken by the present invention to achieve the above objectives are as follows. That is, the fastening device for a rail mounting bracket to a formwork for concrete sleepers according to the present invention attaches the rail mounting bracket to an opening formed in the bottom plate of the formwork for concrete sleepers, and attaches the rail retainer formed on the rail mounting bracket to the opening formed in the bottom plate of the formwork for concrete sleepers. A rail mounting bracket for fastening the rail mounting bracket to the formwork by inserting the rail mounting bracket into a state in which the tool insertion hole protrudes below the bottom plate part and a part of the rail mounting bracket is in contact with the upper surface of the bottom plate part. In the fastening device, an engaging member that engages with an end of the insertion hole is placed below the bottom plate portion so as to face each other in the width direction of the opening of the formwork. The engaging member is provided to be swingable around an axis, and the engaging member is connected to a rotating operating shaft via a spring that biases the engaging member in the engaging direction, and the engaging member is connected to the rotating operating shaft to rotate the operating shaft. Therefore, the engaging member is in a fastened state in which the engaging member is engaged with both ends of the insertion hole under elastic deformation of the spring to urge the rail mounting bracket downward; It is characterized in that it is configured to be able to be freely switched to a fastening release state in which the rail mounting metal fitting is removed from the insertion hole and allowed to come out of the opening.

In addition, the above-mentioned engaging members are respectively provided below the bottom plate portions of the plurality of concrete sleeper formworks arranged in parallel in the width direction, and the plurality of said engagement members corresponding to the plurality of formworks are provided. are connected to a common rotating operating shaft via a spring that biases the engaging member in the engaging direction, and the engaging member is rotated by the rotating operation of the operating shaft. is engaged with both ends of the insertion hole under elastic deformation of the spring to urge the rail mounting bracket downward; and the engagement member is separated from the insertion hole and removed from the opening. It is more effective to configure it so that it can be freely switched to an unfastened state that allows the rail mounting fitting to come off.

[Effect]

According to the above characteristic configuration, the rail mounting bracket is set in the formwork opening with the engagement member in the unfastened state, and the rail mounting bracket is set in the formwork opening by switching the engagement member to the fastened state. is concluded.

When demolding, the engaging member is switched to the unfastened state, so even if the spring force that urges the engaging member is set strongly so that the engagement is performed reliably and firmly, the mold is removed. The rail mounting fittings can be easily extracted from the frame opening, and the concrete sleepers can be easily removed from the formwork.

In particular, the above-mentioned engagement member and spring are provided below each bottom plate of a plurality of concrete formworks arranged in parallel in the width direction, and these are connected to a common rotating operation shaft to change the fastened state and release the fastened state. When switching the state, a plurality of rail mounting brackets corresponding to the formwork are fastened to the formwork opening at once, and the spring connected to the engagement member is elastically deformed. Therefore, each rail mounting bracket can be securely fastened to the formwork opening without any looseness.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a manufacturing apparatus for a plurality of concrete sleepers, 1 is a frame frame, 2 is the frame frame 1
A plurality of formworks 2 for concrete sleepers are installed in the upper frame 1a and are arranged in parallel in the width direction.

As shown in FIG. 2, the formwork 2 for concrete sleepers has side plate parts 4, 4 on both sides in the width direction of the bottom plate part 3.
are set up and connected, and both plate parts 3, 4, 4
An end plate part 5 is flanged to both ends in the longitudinal direction (only one end is shown), and the end plate part 5 holds an unbonded PC steel wire a for introducing stress, and the bottom plate part 3 Two sets (one set in the drawing) of two openings 6, 6 adjacent to each other in the longitudinal direction are formed on both sides in the longitudinal direction of the end plate part 5.
An erection flange 7 is provided at the upper edge of the side plate parts 4, 4. In addition, 8 and 8 in the figure are the openings 6,
These are seal members attached to three sides of 6.

Returning to FIG. 1 and FIG. 2, reference numeral 9 denotes a rail mounting bracket, and the seal mounting bracket 9 includes an anchor part 10, a contact part 11 that comes into contact with the inner surface of the formwork around the opening 6, and a rail holder. It consists of an insertion hole portion 12 in which a tool insertion hole b is formed, and the insertion hole portion 12 is inserted into the openings 6, 6 from the inside of the mold with the contact portion 11 in contact with the inner surface of the mold. ing.
The hole axis Q of the rail presser insertion hole b is directed in the width direction of the formwork 2 when the rail mounting bracket 9 is inserted into the two openings 6, 6.

Reference numeral 13 denotes a fastening device for the rail mounting bracket 9 to the formwork 2, and more specifically, as shown in FIGS. A pair of brackets 14, 14 are hung down and connected to each other on the lower surface of the mold, and an L-shaped engagement member 15 is attached to each of the brackets 14, 14 so as to be able to swing freely around an axis 16 in the longitudinal direction of the formwork 2. The engaging portion c on one end side of the engaging member 15 is pivotally connected to
, the rail mounting bracket 9 inserted into the opening 6
It is designed so that it can be switched between a state in which it is engaged with the end of the insertion hole b and a state in which it is disengaged.

On the other hand, a rotation operation shaft 17 which is long in the direction in which the formworks 2 are arranged side by side is attached to the frame 1 at a position below the opening 6, and the rotation operation shaft 1
7, an arm 18 is provided near the arrangement portion of the engaging member 15, and the arm 18 and the engaging member 15
The other end side is connected by a spring 19, and the plurality of engagement members 15 corresponding to the plurality of molds 2 are connected by the rotation operation of the rotation operation shaft 17. A fastening state X in which the engaging portion c of the engaging member 15 is engaged with both ends of the insertion hole b under elastic deformation of the spring 19 to urge the rail mounting bracket 9 downward, and the engaging member 15 is disengaged from the insertion hole b to allow the rail mounting bracket 9 to come out of the opening 6.

Then, with the engagement member 15 in the unfastened state Y, the rail mounting bracket 9 is set in the opening 6 from the inside of the formwork 2, and the rotation operation shaft 14 is
By rotating and switching the engaging member 15 to the fastening state X, the rail mounting fittings 9 corresponding to the openings 6 of each of the plurality of formworks 2 are fastened to the formwork openings 6 at once. Even if there is a manufacturing error in the rail mounting bracket 9 or a distortion in the formwork 2, the spring 1 in each engaging member 15 can be
Since only the amount of elastic deformation of the rail fittings 9 changes, the plurality of rail mounting fittings 9 can be firmly fastened to the opening 6 of the formwork 2 without wobbling.

As described above, the concrete sleeper formwork 2
At the same time, the rail mounting bracket 9 is fastened to the rail mounting bracket 9, and an unbonded PC steel wire a is stretched to the end plate portion 5, and
Pour concrete into the formwork 2, apply vibration to the frame 1 as necessary,
By separating and demolding the end plate portion 5 after the concrete hardens, the anchor portion 1 of the rail mounting bracket 9 is removed, as shown in FIGS. 5 and 6.
A concrete sleeper 20 in which 0 is embedded is produced.

Then, a rail 21 is placed between the rail mounting fittings 9, 9, and rail pressers 22, 22 are placed on both sides of the flange portion d of the rail 21,
In addition, the rail presser 2 is inserted into the insertion hole b of the rail mounting bracket 9 so as to press the rail presser 22.
3, the rail 21 is laid.

In the above-mentioned embodiment, the present invention will be explained by taking as an example a case where a plurality of concrete sleeper forms 2 are arranged in parallel in the width direction on one frame 1 to form a plurality of concrete sleepers. However, the present invention
Even in the case where concrete sleepers are formed one by one, the above-mentioned engaging member 15 and spring 1 are used for each concrete sleeper form 2.
9 and a rotating operation shaft 17.

[Effect of idea]

Since the present invention has the above-mentioned configuration, even if the spring force of the engaging member is strengthened so that the rail mounting bracket can be securely and firmly fastened, the rail mounting bracket can be easily set and the concrete sleeper can be easily removed from the mold. It can be done.

In particular, according to the structure of claim (2), a plurality of engaging members corresponding to a plurality of formworks are brought into a fastened state at once by one rotational operation on the rotational operation shaft. Then, by setting the rail mounting bracket in the formwork opening with the engaging member in the unfastened state, and then switching the engaging member to the fastened state, the plurality of A plurality of rail attachment fittings corresponding to the formwork can be fastened to the formwork opening at once.

Moreover, since the spring is under elastic deformation in the above-mentioned fastened state, each rail mounting bracket can be securely fastened to the formwork opening without wobbling, regardless of manufacturing errors of the rail mounting bracket or distortion of the formwork. You get it.

By switching the plurality of engagement members to the disengaged state, the rail mounting bracket can be easily extracted from the formwork opening, and as a result,
Not only can concrete sleepers be demolded one by one, but also multiple concrete sleepers can be demolded at the same time.

Moreover, since the plurality of rail mounting brackets are fastened by a simple rotational operation with respect to the rotational operation shaft, unlike the conventional method, a plurality of rail mounting brackets corresponding to a plurality of formworks are connected. Compared to the case where the operating shafts are individually inserted through the insertion holes, the operating space required is extremely small, and overall, all of the conventional drawbacks have been overcome by extremely simple improvements.

[Brief explanation of drawings]

Figure 1 is a sectional view of the concrete sleeper manufacturing equipment, Figure 2 is a perspective view showing a part of the concrete sleeper formwork and rail mounting hardware, and Figure 3 is a cross-sectional plan view showing the main parts of the fastening device. 4 is a longitudinal sectional side view of the same. FIG. 5 is a sectional view of the concrete sleeper, and FIG. 6 is a plan view of the concrete sleeper.
FIG. 7 is a sectional view of a conventional concrete sleeper manufacturing apparatus. 2... Formwork for concrete sleepers, 3... Bottom plate portion, 6... Opening, 9... Rail mounting bracket, 15
...Engagement member, 17... Rotation operation shaft, 19... Spring, b... Rail presser insertion hole, X... Fastened state, Y... Fastened state.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The rail mounting bracket is inserted into the opening formed in the bottom plate of the formwork for concrete sleepers, and the rail holding tool insertion hole formed in the rail mounting bracket is inserted into the opening formed in the bottom plate of the formwork for concrete sleepers. A rail mounting bracket fastening device for fastening the rail mounting bracket to the formwork by inserting the rail mounting bracket into a state in which the rail mounting bracket protrudes downward and a part of the rail mounting bracket is in contact with the upper surface of the bottom plate part,
An engaging member that engages with an end of the insertion hole is provided below the bottom plate portion so as to be opposite to both sides of the opening in the formwork width direction, and is swingable about an axis in the longitudinal direction of the formwork. At the same time, the engaging member is connected to a rotating operating shaft via a spring that biases the engaging member in the engaging direction, and the engaging member is rotated by rotating the operating shaft. , a fastened state in which the engaging member is engaged with both ends of the insertion hole under elastic deformation of the spring to urge the rail mounting bracket downward; and a fastened state in which the engaging member is separated from the insertion hole. A fastening device for a rail mounting bracket to a formwork for a concrete sleeper, characterized in that the device is configured to be able to switch freely between a fastening release state that allows the rail mounting bracket to come out of the opening. (2) In the opening formed in each bottom plate of multiple concrete sleeper formwork installed in parallel in the width direction,
Inserting each rail mounting bracket into a state in which a rail presser insertion hole formed in the rail mounting bracket projects below the bottom plate part and a part of the rail mounting bracket is in contact with the upper surface of the bottom plate part, A fastening device for a rail mounting bracket for fastening the rail mounting bracket to the formwork, wherein the rail mounting bracket is inserted into the bottom plate portion so as to be opposite to each other in the formwork width direction of the opening in each of the formworks. An engaging member that engages with the end of the hole is provided to be swingable around an axis in the longitudinal direction of the mold, and a plurality of the engaging members corresponding to the plurality of molds are provided with the engaging member. It is connected to a rotating operating shaft via a spring that urges it in the engagement direction, and the engaging member is rotated by the rotating operation of the operating shaft, and the engaging member is connected to the rotating operating shaft under the elastic deformation of the spring. A fastened state in which the rail mounting bracket is urged downward by engaging with both ends of the insertion hole, and a fastening state in which the engaging member is disengaged from the insertion hole to allow the rail mounting bracket to come out from the opening. A fastening device for a rail mounting bracket for a formwork for concrete sleepers, characterized in that it is configured to be able to be switched freely between a fastening state and an unfastened state.