JP2810992B2 - Formwork equipment for rail fastening shoulder embedding - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork device for embedding rail fastening shoulders, which is used when manufacturing track slabs and concrete sleepers in which rail fastening shoulders are embedded.

[0002]

2. Description of the Related Art A conventional formwork apparatus A shown in FIGS. 8 and 9 is described in Japanese Utility Model Publication No. 3-54887 and is for concrete sleepers. Form B to be poured and bottom plate B1 of form B
And a fixing device C for temporarily fixing the rail fastening shoulder D to the mold B until the concrete is hardened in a state where the embedding portion D1 of the rail fastening shoulder D is projected into the mold B.

The bottom plate B1 of the form B is provided with a fitting hole B2 through which the exposed portion D2 of the rail fastening shoulder D is fitted. The fixing device C allows the exposed portion D2 of the rail fastening shoulder D to be inserted. It comprises a holding portion C1 for holding, and a rod-shaped body C2 arranged to be able to reciprocate toward a through hole D3 of an exposed portion D2 of the rail fastening shoulder D.

[0004] In the formwork device A, the holding portion C1 of the fixing device C is provided with a ridge C3 projecting from the inner peripheral surface of the fitting hole B2 of the formwork B and an exposed portion D2 of the rail fastening shoulder D. And an exposed portion of the rail fastening shoulder D on the inner peripheral surface of the fitting hole B2 and the upper surface of the ridge C3. Sealing material B that adheres to D2 to prevent leakage of slurry concrete
3 are adhered.

[0005] In the formwork device A, when the fixing device C is used, the elastic cylinder C5 is previously fitted into the through hole D3 of the rail fastening shoulder D, so that the rail fastening shoulder D can be inserted into the through hole D3. The temporary fixing of the rail fastening shoulder D to the formwork B by inserting the rod-shaped body C2 is ensured.

FIG. 10 shows the use of a molded product E which is a concrete sleeper. One end of a steel J-clip F shown in the figure is a through hole D of a rail fastening shoulder D.
3 and is fixed to the rail fastening shoulder D, and the molded product E is formed by the strong spring force developed at the other end.
The rail G is firmly fixed.

Incidentally, four rail fastening shoulders D are embedded in the molded product E. When the molded product E is removed from the mold B of the formwork device A, the four rail fastening shoulders D are used. It is necessary to pull out each of the exposed portions D2 from the fitting hole B2 of the mold B at a stretch.

A molded product E which is a concrete sleeper
Since the molded product E is heavy, when removing the molded product E from the mold B of the mold apparatus A, a mechanical device such as a hoist that lifts the molded product E is used.

However, the pull-out resistance value when pulling out the exposed portion D2 of each rail fastening shoulder D of the molded product E from the fitting hole B2 of the mold B is generally non-uniform within the mold B, and The molded product E is tilted during the pulling out and does not lift vertically vertically. As a result, the exposed portion D2 of each rail fastening shoulder D comes into strong local contact with the sealing material B3 of each fitting hole B2 of the mold B. As a result, the removal of the molded article E from the mold B is not successful, and in the mold apparatus A, it is often necessary to repeat the operation of lifting the heavy molded article E from the mold B with a hoist or the like many times. Had occurred.

[0010] Therefore, the conventional molding apparatus A includes a molded product E
There is a problem that it takes time and effort to remove the mold from the mold B.

When the molded product is a track slab, the amount of concrete is larger than that of a concrete sleeper.
Therefore, since the weight is large and the number of rail fastening shoulders to be embedded is large, the problem that the demolding work is troublesome has been a bigger problem than when the molded product is a concrete sleeper.

[0012]

In view of the THE INVENTION Problems to be Solved] The problems of the prior art, the present invention, the mold framework and mold conventional formwork device of FIG. 8 illustrates a time required for demolding the work of the molded product from frame A
It is an object of the present invention to provide a formwork device for embedding a rail fastening shoulder which can be reduced as compared with the above.

[0013]

As a means for solving the above-mentioned problems, according to the first aspect of the present invention, a mold into which concrete is poured, and an embedded portion of a rail fastening shoulder from the bottom plate of the mold are formed. The following configuration is added to a form device for embedding a rail fastening shoulder which includes a fixing device for temporarily fixing the rail fastening shoulder to the form until the concrete hardens while being protruded inward.

That is, according to the first aspect of the present invention, a pair of locking holes arranged in parallel on the left and right sides are formed in the bottom plate of the formwork, and the locking holes are provided with exposed rail fastening shoulders. frame joint and a section puller, which extends into the fitting hole and the lower for fitting the can was Datsukakari capable say that have engaged configuration towards the mold.

[0015] Further, the fixing device of the formwork device includes
Direction perpendicular to the parallel line of the locking holes penetrating in parallel
A main shaft that can move forward and backward is provided.

The main shaft has a pair of locking holes on the left and right, which are arranged side by side.
At the corresponding position, project from the spindle in the direction of its advance.
That project from the pair of locking holes
Into the through hole at the exposed part of the shoulder
Are provided, and the rod is integrally formed with the rod.
It is inserted into the through hole and presses down the rail fastening shoulder downward.
The elastic member is provided.

According to the second aspect of the present invention, the left and right sides of the
The locking holes aligned in a pair at
Multiple sets are installed in a line in a straight line
And a rod-shaped body protruding from one main shaft of the fixing device
And an elastic body of the locking holes arranged in parallel on the left and right,
It is provided at the position corresponding to each of the plural sets
Is added to the first aspect of the present invention.

[0018]

According to the first aspect of the present invention, as shown in FIG. 7, a locking hole 12 is formed through a bottom plate 11 of a mold 10 (see FIG. 1). Since the frame joint 20 having the fitting hole 21 into which the exposed portion 42 of the rail fastening shoulder 40 is fitted is detachably engaged toward the inside of the mold 10, the embedded portion 4 of the rail fastening shoulder 40 is provided.
The frame joint 20 that has been engaged with the locking hole 12 of the formwork 10 is rail-fastened to the fitting hole 21 only by an operation of lifting the molded product 50 embedded in concrete with a mechanical device such as a hoist. It is disengaged from the locking hole 12 while the exposed portion 42 of the shoulder 40 is fitted, and is released from the mold 10 together with the molded product 50.

Therefore, according to the first aspect of the present invention, even when a large number of rail fastening shoulders 40 are embedded in the molded product 50, when the molded product 50 is removed from the mold 10,
The frame joint 20 was once removed from the mold 10 together with the molded product 50, and thereafter, the frame joint 20 was extended downward from the exposed portion 42 of each rail fastening shoulder 40 of the molded product 50 .
By pulling individually by pulling the puller ,
It is possible to complete the demolding of the molded product 50 from the mold 10 without having to pull out all the rail fastening shoulders D from the fitting holes B2 of the mold B at a stretch as in the conventional mold apparatus A shown in FIG. it can.

Therefore, according to the first aspect of the present invention, the molded article 50
Of the molded product 50 from the mold frame 10 due to the unevenness even if the pull-out resistance value when the frame joint 20 is pulled out from the exposed portion 42 of each rail fastening shoulder 40 is not uniform in the molded product 50. The molded product 50 does not tilt at the time of demolding, and therefore, the work of lifting the heavy molded product 50 from the inside of the mold frame 10 with a hoist or the like due to the unevenness is not repeated.

[0021] In the present invention of claim 1, as shown in FIGS. 2 to 4, the fixing device 30, reciprocally disposed toward the through hole 43 of Exposed portions 42 of the rail fastening shoulder 40 The rod-shaped body 32 and the elastic body 33 fixed to the rod-shaped body 32 and inserted into the through hole 43 together with the rod-shaped body 32 to resiliently press the rail fastening shoulder 40 downward. After the exposed portion 42 of the fastening shoulder 40 is held by the holding portion 31 of the fixing device 30, the rod 32 is moved forward (see FIG. 3) toward the through hole 43 of the exposed portion 42, and is fixed to the rod 32. The elastic body 33 and the rod 32 are connected to each other by the through hole 43 of the rail fastening shoulder 40.
The rail fastening shoulder 40 is pressed downward by the elasticity of the elastic body 33, and
The rod-shaped body 32 is moved backward (see FIG. 2), and the rod-shaped body 32 and the elastic body 32 are pulled out from the through-hole 43 of the rail-fastened shoulder 40. The fixing of 40 is released.

Therefore, according to the first aspect of the present invention, the left and right
Two exposed portions 4 protruding from the locking holes arranged in parallel
Only by reciprocating the rod 32 toward the two through holes 43, it is possible to securely fix the two rail fastening shoulders 40 to the formwork 10 and release the fixation.

According to the second aspect of the present invention, the left and right sides are arranged in a pair.
In the direction where the aligned system blind holes are perpendicular to the parallel line,
In a linear array, multiple sets are penetrated as a group,
Fastening of multiple rails with one advance / retreat of main shaft of fixing device
Securely fix and release the shoulder at the same time
You.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS.
And mold apparatus 1 which is an example of embodiment applying together inventions of claim 2 is intended for track slabs, a mold 10 made of metal which concrete is poured, the bottom plate 11 of the mold 10 And a fixing device 30 for temporarily fixing the rail fastening shoulder 40 to the mold 10 until the concrete is hardened in a state where the embedded portion 41 of the rail fastening shoulder 40 is projected into the mold 10.

In this formwork apparatus 1, as shown in FIG. 7, a locking hole 12 is formed through the bottom plate 11 of the formwork 10, and a rail fastening shoulder 40 is formed in the locking hole 12.
The metal frame joint 20 having the fitting hole 21 into which the exposed portion 42 is fitted is removably engaged in the mold 10. Reference numeral 50 in FIG. 7 indicates a molded product that is a track slab.

In the formwork device 1, the inner peripheral surface of the locking hole 12 of the formwork 10 is an upward tapered surface 13 and the outer peripheral surface of the frame joint 20 is a downward tapered surface 22. The downward tapered surface 22 is locked to the upward tapered surface 13 of the locking hole 12, and the frame joint 20 engaged with the locking hole 12 can be disengaged into the mold 10.

In the formwork apparatus 1, as shown in FIGS . 4 and 5, a rubber sealing material 23 for preventing the leakage of the slurry-like concrete is provided in the fitting hole 2 of the frame joint 20.
7, the peripheral edge of the fitting hole 21 in the frame joint 20 is formed of a sealing material 23, and a puller 25a having a finger stopper 26a (FIG. 6A , FIG. 7 ) . of
( See (c) ) is fixed to the lower surface 24 of the frame joint 20 and extends downward from the lower surface 24 of the frame joint 20 with the finger stopper 26a at the lower end.

FIG. 6B shows the pulling tool 25.
A pulling tool 25b different from a is illustrated, and a through hole 26b through which a finger passes is provided in the pulling tool 25b.
Note that the pulling tool is not limited to the pulling tools 25a and 25b described above, and may be, for example, a simple rod-shaped tool.

Further, in the formwork device 1, as shown in FIGS. 3 and 4, the fixing device 30 comprises a holding portion 31 for holding the exposed portion 42 of the rail fastening shoulder 40 and an exposed portion 4
A rod-like body 32 disposed reciprocally toward the through-hole 43 of the second rod-shaped body;
2 and an elastic body 33 which is a spring material inserted into the through hole 43 of the rail fastening shoulder 40 and resiliently presses the rail fastening shoulder 40 downward, and the holding portion 31 of the fixing device 30 includes: L-shaped fitting 34 fixed to the lower surface of bottom plate 11 of formwork 10 at a position near locking hole 12
And the engaging edge 4 of the exposed portion 42 of the rail fastening shoulder 40
4 is formed from an engagement portion 27 of the frame joint 20 which engages with the frame joint 4.

As shown in FIGS. 1 to 3, in the formwork apparatus 1, two main shafts 35 arranged below the bottom plate 11 of the formwork 10 are paired on the left and right sides of the bottom plate 11. And
Through the two parallel locking holes 12 and
The locking holes 12 are provided so as to be able to reciprocate in the longitudinal direction of the intersecting molds 10 and are arranged in parallel with one set of
The arm member 36 is fixed at a position corresponding to the main axis 35 at right angles to the main shaft 35, and the rods 32 are fixed to both ends of each arm member 36 in parallel with the main shaft 35. With the reciprocating motion, reciprocating motion toward the through hole 43 of the rail fastening shoulder 40 is enabled. In addition,
Reference numeral 37 in FIGS. 2 and 3 denotes a bearing that supports the main shaft 35 so as to reciprocate in the longitudinal direction of the mold 10.

In the illustrated embodiment, as shown in FIG.
The locking holes 12 arranged in a pair on the left and right
A set of eight sets in a linear array in the direction orthogonal to each other
Are provided in two rows, and one spindle 35 is arranged in each row.
ing.

By the way, in the formwork apparatus 1, the locking holes 12 of the formwork 10 are formed as upward tapered surfaces 13 as shown in FIG. 7B, and the outer peripheral surface of the frame joint 20 is formed as downward tapered surface 22. The downward tapered surface 22 of the frame joint 20 is locked to the upward tapered surface 13 of the locking hole 12, and the frame joint 20 engaged with the locking hole 12 of the mold 10 is
The engagement structure between the locking hole 12 of the formwork 10 and the frame joint 20 is such that the frame joint 20 engaged with the locking hole 12 of the formwork 10 can be disengaged inward. The structure is not limited to the structure of the formwork device 1 described above, as long as the structure can be disengaged into the frame 10.

Although the sealing material 23 is made of rubber in the formwork apparatus 1, the material of the sealing material 23 is not limited to rubber, and may be a synthetic resin such as ethylene tetrafluoride or a fibrous material. There may be. However, considering the variation in the dimensions of the rail fastening shoulder 40, it is preferable that the material of the sealing member 23 is rubber having elasticity.

Further, in the formwork device 1, the sealing material 23 is bonded to the inner peripheral surface of the fitting hole 21 of the frame joint 20 so that the periphery of the fitting hole 21 in the frame joint 20 is sealed.
However, the periphery of the fitting hole 21 is
The means formed by the method is not limited to the bonding.
For example, a ring-shaped sealing material may be fitted into a concave groove formed in the inner peripheral surface of the first member.

Furthermore, in the formwork apparatus 1, the frame joint 20 is made of metal, but the material of the frame joint 20 is not limited to metal, but may be plastic such as FRP or wood. Further, the frame joint 20 may be formed not only of the peripheral portion of the fitting hole 21 but also of the entire frame joint 20 with hard rubber.

[0036] While the mold apparatus 1 shown is intended for track slabs are not limited to those for orbit slab, for example, those for concrete sleepers, such as a conventional mold apparatus A of FIG. 8 shown It may be.

[0037]

According to the first aspect of the present invention, even if the pull-out resistance value at the time of pulling out the frame joint from the exposed portion of each rail fastening shoulder of the molded product is not uniform within the molded product, it is caused by this non-uniformity. Therefore, the molded article does not tilt when the molded article is removed from the mold, and therefore, due to the unevenness, the work of lifting the heavy molded article from the inside of the mold with a hoist or the like is not repeated. Compared with the conventional mold apparatus A shown in FIG. 8, which often needs to repeat this lifting operation many times, it is possible to reduce the labor required for removing the molded product from the mold. Play.

Further, the frame joint that is released from the mold with the molded product when withdrawn from the exposed portion of each rail fastening shoulder, by pulling the puller being secured to the frame joints downwardly, the frame joint each it is possible to pull out from the exposed portion of the rail fastening shoulder, it can be reduced cutting effort required for pulling work of the frame joint from the exposed portion, an effect that.

[0039] Further to expose the exposed portion of the locking hole a fit Lumpur fastening shoulder of the mold, only reciprocating the rod-like body toward the through hole of the exposed portion, the right and left pair of 2 to mold Pieces
8 can be realized in a single operation, and the elastic cylinder D3 (see FIG. 8) needs to be inserted into and pulled out of the through hole of the rail fastening shoulder. Compared with the conventional formwork device A shown in the figure, the work required for securely fixing the rail fastening shoulder to the formwork and releasing the fixation is reduced, and the working efficiency is improved.
It has the effect of being able to make

According to the second aspect of the present invention, the left and right
Multiple sets of exposed rail fastening shoulders
The set is fixed by one operation of the spindle rod,
Can be unlocked, further improving work efficiency
Has the effect of

[Brief description of the drawings]

FIG. 1 is a plan view showing an example in which both the first and second aspects of the invention are applied.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a cross-sectional view showing a state where a rail fastening shoulder is temporarily fixed to a mold.

FIG. 4 is an end view of a section taken along line YY of FIG.

FIG. 5 is a rear view showing a frame joint.

FIG. 6A is a perspective view showing a pulling tool. (B) is a perspective view showing a pulling tool different from the pulling tool of (a).

FIG. 7A is a cross-sectional view showing a state before a molded article is released from a mold. (B) is a sectional view showing a state immediately after the molded article is released from the mold. (C) is a cross-sectional view showing a state immediately after the removal of the molded product from the mold is completed.

FIG. 8 is a sectional view showing an example of a conventional product.

9 is an end view of a section taken along line ZZ of FIG.

FIG. 10 is a perspective view showing a use state of a concrete sleeper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Formwork apparatus 10 Formwork 11 Formwork bottom plate 12 Locking hole 20 Frame joint 21 Fitting hole 23 Sealing material 24 Lower surface of frame joint 25a, 25b Pulling tool 30 Fixing device 31 Holding part 32 Bar-shaped body 33 Elastic body 40 Rail Fastening shoulder 41 Embedded part of rail fastening shoulder 42 Exposed part of rail fastening shoulder 43 Through hole

Claims (2)

(57) [Claims] 1. A mold into which concrete is poured, and a rail fastening shoulder is temporarily fixed to the mold until concrete is solidified in a state in which an embedding portion of the rail fastening shoulder is projected from the bottom plate of the mold into the mold. in formwork device for the rail fastening shoulder buried comprising a fixing device which, in the bottom plate of the mold frame, locking holes which are brought in parallel to the pair in the left and right is formed through each, the individual locking In the hole, a frame joint having a fitting hole for fitting the exposed portion of the rail fastening shoulder and a pulling tool extending downward is disengageably engaged into the mold .
The fixing device is provided with a pair of
It has a main shaft that can advance and retreat in the direction perpendicular to the parallel line of the stop holes, and the main shaft has a position corresponding to the locking holes arranged in a pair on the left and right.
And protrudes from the main shaft in the direction in which the main shaft extends.
Rail fastening shoulders protruding from each set of right locking holes
Each rod is inserted into the through hole of the exposed part of the
And the rod-shaped body are inserted into the through-hole integrally with the rod-shaped body.
And an elastic body that presses down the shoulder fastening shoulder downward.
Formwork equipment for the rail fastening shoulder embedded that is. 2. A pair of right and left side plates are arranged on the bottom plate of the formwork.
The locking holes are aligned linearly in a direction perpendicular to the parallel lines.
A plurality of sets are formed as a group, and a rod-shaped body protruding from one main shaft of the fixing device;
The body and the plurality of sets of the locking holes parallel to each other on the left and right
2. The method according to claim 1, wherein the plurality of sets are provided at positions corresponding to the sets.
A formwork device for embedding a rail fastening shoulder according to the above.