JP2000145388A - Form device for tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce working as a large bending force on an upper-lower place adjusting device of the load of a form supporting member at a time when the supporting member is displaced largely in the lateral direction. SOLUTION: A form supporting member 11 is supported onto a rail 3 in a manner that the member 11 can be made to travel through an upper-lower adjusting device 14 (a cylinder device) and a lateral-place adjusting device 15. A roller is interposed between a lower member on the rail 3 side and an upper member on the form supporting member 11 side. The roller is brought to a rollable state to both members respectively. The roller is held rotatably to a truck, and displaced in the lateral direction by rotating a screw rod held to the lower member in a non-displaceable manner rotatably in the axial direction. The truck, the roller, is only displaced in the lateral direction by the L of the half of 2L for displacing the form supporting member 11 in the lateral direction by 2L.

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 a tunnel.

[0002] When forming a tunnel, first, a tunnel is excavated so as to have a predetermined tunnel sectional shape.
After that, the inside of the tunnel is concreted. When the inside of the tunnel is concreted, a formwork device is arranged in the tunnel, and concrete is poured between the formwork device and the inside surface of the tunnel. Such a formwork device includes a formwork support member that can travel on rails arranged along the tunnel longitudinal direction, and a formwork member for forming a tunnel inner surface held by the formwork support member, The form support member is supported on the rail via a vertical position adjusting device for adjusting the vertical position and a horizontal position adjusting device for adjusting a horizontal position intersecting the rail.

As the vertical position adjusting device, a hydraulic cylinder device is generally used in many cases. Further, as the lateral position adjusting device, a structure in which a roller is rotatably held by an upper member on the form support member side, that is, the form support member can travel in a lateral direction with respect to the rail via the roller. Structures are often used. The vertical position adjusting device is disposed such that the center of the vertical position adjusting device coincides with the center position in the width direction of the rail. Also, when the form support member is at the neutral position in the lateral direction. The load of the form support member via the roller is set so as to be input to the center of the vertical position adjusting device.

[0004] The formwork device is usually sufficiently short in comparison with the entire length of the tunnel. For this reason, when concrete is stretched by the length of the formwork device, the formwork device is moved along the rail. Then, the next concrete upholstery is repeated. Usually, the rail position with respect to the tunnel, that is, the position of the formwork device is slightly deviated. For this reason, the positioning of the formwork device with respect to the tunnel is performed by the above-described vertical position adjusting device and the lateral position adjusting device.

[0005]

When the form device is largely displaced in the lateral direction with respect to the rail, the rollers are also displaced in the lateral direction by the same amount as the form supporting member. The load of the form support member via the roller is input to a position that is considerably shifted laterally with respect to the center of the rail. This causes a large bending force to be generated with respect to the lifting / lowering device, which not only prevents smooth lifting / lowering, but also causes a situation where the lifting / lowering device is significantly bent and deformed in extreme cases. . To prevent such a situation, the rail width must be extremely large, or the number of rails installed in the horizontal direction must be increased, and the vertical position adjustment device must be reinforced to withstand large bending forces. Although it is conceivable to attach a member, etc., in any case, the cost is greatly increased.

The present invention has been made in view of the above circumstances, and an object of the present invention is to displace a roller itself in a lateral direction when a mold supporting member is displaced in a lateral direction via a roller. An object of the present invention is to provide a tunnel formwork device that is smaller than a lateral displacement of a support member and can reduce a situation in which an excessive bending force acts on a vertical position adjusting device.

[0007]

In order to achieve the above-mentioned object, the present invention adopts the following solution. That is, as described in claim 1 of the claims, a form support member capable of running on a rail disposed along the longitudinal direction of the tunnel, and forming a tunnel inner surface held by the form support member And a form supporting member, wherein the form supporting member is supported on the rail via a vertical position adjusting device for performing vertical position adjustment and a horizontal position adjusting device for adjusting a horizontal position intersecting the rail. In the formwork device for tunnels, the lateral position adjusting device is interposed between the lower member on the rail side and the upper member on the formwork support member side, and the upper member and the lower member On the other hand, there is provided a roller which can freely roll and receives a load from the form support member, and position changing means for changing a lateral position of the roller.
Preferred embodiments on the premise of the above solution are as described in claim 2 and the following claims.

According to the first aspect, since the rollers are rotatable with respect to the form support member side and the rail side, respectively, when the form support member is displaced in the lateral direction with respect to the rail. Since the roller itself is only displaced laterally by half of the lateral displacement of the form support member, the bending force acting on the vertical position adjusting device is reduced. Further, the rollers are also displaced in the same direction in accordance with the lateral displacement of the form supporting member, which is preferable in terms of stable support of the form supporting member via the rollers.
Further, since the roller itself receives a large load from the form supporting member, the load bearing capacity is sufficient as compared with, for example, a case in which a small-diameter support pin constituting the rotation center of the roller bears the large load. It becomes something.

According to the second aspect, the holding of the roller and the lateral displacement of the roller can be easily obtained by using the cart. According to the third aspect, the roller can be easily displaced in the lateral direction by a simple structure using the threaded rod, and is preferable in preventing a situation in which the roller is inadvertently displaced in the lateral direction. Become. According to the fourth aspect, a more specific structure for obtaining an effect corresponding to the third aspect is provided.

According to the fifth aspect, the regulation of the lateral displacement of the roller can be easily obtained by regulating the rotation of the threaded rod using the lock nut. According to the sixth aspect, it is possible to easily obtain a structure that enables the screw bar to be rotated using the rotary tool. According to the seventh aspect, it is possible to obtain a preferable one in that the stable support of the form support member via the roller and the load from the form support member are applied to the center of the vertical position adjusting device as much as possible.

According to the eighth aspect, it is preferable to ensure smooth rolling of the roller and to smoothly displace the form support member in the lateral direction. Of course, the roller also has a simple structure. According to the ninth aspect, it is preferable to accurately displace the form support member in the lateral direction according to the lateral displacement amount of the roller. In addition, by restricting the lateral displacement of the roller, it is possible to restrict the lateral displacement of the form support member. According to the tenth aspect, an excessive force acts on the teeth of the toothed rotating body or the toothed elongated body while ensuring smooth rolling of the rollers and smoothly displacing the form support member in the lateral direction. Can be prevented.

According to the eleventh aspect, a plurality of roller rows provided in the lateral direction are provided in a pair in the rail longitudinal direction, so that the form supporting member can be stably supported. Further, since the threaded rod is engaged between the pair of roller rows, an external force for lateral displacement from the threaded rod to the carriage can be applied to the carriage with good balance. According to the twelfth aspect, it is preferable to effectively use the roller itself and accurately displace the form support member in the lateral direction according to the lateral displacement amount of the roller. In addition, by restricting the lateral displacement of the roller, it is possible to restrict the lateral displacement of the form support member. According to the thirteenth aspect, a more specific structure of the portion of the form support member and the form member is provided. In particular, opening and closing (approaching and separating from the inner surface of the tunnel) of the upper form member can be performed using the vertical position adjusting device.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 denotes a tunnel just after excavation, and 2 denotes a tunnel formwork apparatus. The formwork device 2 is substantially symmetrical, and only the left and right halves are shown in FIG.

The formwork device 2 has a formwork support member 11 and a formwork member 12. The form support member 11 is formed substantially in a gate shape, and can run on a rail 3 extending in the longitudinal direction of the tunnel 1. That is, the traveling wheel 13, the vertical position adjusting device 14, and the lateral position adjusting device 15 that are engaged with the rail 3 are sequentially attached to the form support member 11 from below, and the traveling wheel 13 is mounted on the rail 3. In this state, the form support member 11 can travel along the rail 3 together with the adjusting devices 14 and 15.

The form member 12 has a plurality of divided structures in the circumferential direction of the tunnel. More specifically, one upper mold member 1 for forming the tunnel upper surface
2A and a pair of left and right side mold members 12B for forming a tunnel side surface (one of the left and right side mold members 12B is not shown). Each of the left and right side mold members 12B further includes an upper mold member 12B1.
And a lower side frame member 12B2. Adjacent divided mold members are rotatably connected by connecting pins 16.

The upper mold member 12A is provided with a
It is in a state of being fixed at all times to the upper part. The side frame members 12B (12B1, 12B2) are rod-shaped, and are connected to the frame support member 11 via a length adjusting member 17 whose length can be adjusted. The connecting portion of the length adjusting member 17 to the form member 12B or the form supporting member 11 is rotatable.

Opening / closing (approaching / separating) of the upper mold member 12A with respect to the inner surface of the tunnel is performed by the above-described vertical position adjusting device
4 is performed by vertically displacing the form support member 11 itself. The opening and closing of the side mold member 12B is performed by extending and contracting the length adjusting member 17. The vertical position adjustment device 14 and the horizontal position adjustment device 15 adjust the vertical and horizontal positions of the form support member 11 so that the form member 12 is at a predetermined position on the inner surface of the tunnel.

FIGS. 2 and 3 show the details of the vertical position adjusting device 14 and the horizontal position adjusting device 15. The vertical position adjusting device 14 and the horizontal position adjusting device 15 are respectively provided at least at four positions in the front, rear, left and right with respect to the form support member 11. This focuses on the device 15.

First, the vertical position adjusting device 14 comprises a hydraulic cylinder device 20 in the embodiment, and its cylinder 20a is fixed to the upper surface of a wheel holding member 4 for holding the traveling wheel 3, and its piston rod 20b is , Are fixed to the lower surface of a substantially horizontal flat lower member 31. In order to reinforce the cylinder device 20, a pair of upper and lower reinforcing cylinders 21 and 22 slidably fitted to each other are fixed to the upper surface of the wheel holding member 4 or the lower surface of the lower member 31.

The lateral position adjusting device 15 has a plurality of rollers 32. The roller 32 is capable of rolling on the lower member 31 described above. A substantially horizontal flat plate-shaped upper member 33 fixed to the lower portion of the form support member 11 is rollably contacted with the upper portion of the roller 32. Upper and lower members 3
Reference numerals 1 and 33 are each made of a member having sufficient rigidity such as an iron plate. Further, the outer shape of the roller 32 is a perfect circle, and its rotation axis extends in the longitudinal direction of the rail 3. Load of form support member 11 (form support member 1
1, the weight of the mold member 12 and the weight of the concrete when the concrete is filled between the mold member 12 and the inner surface of the tunnel). 31, it is applied to the rail 3 via the cylinder device 20.

The details of the lateral position adjusting device 15 are shown in FIG.
This is shown in FIG. 5 (FIGS. 2 and 3 partially omit the members shown in FIGS. 4 and 5). The lateral position adjusting device 15 will be described in detail with reference to FIGS. First,
The roller 32 is held on a carriage 40. Trolley 40
Has a pair of roller support members 41 spaced apart in the longitudinal direction of the rail 3. Each of the roller support members 41 is elongated in the horizontal direction and rotatably holds a plurality (two in the embodiment) of the rollers 32 at intervals in the horizontal direction. The pair of roller supporting members 41 are connected by a connecting member 42 as a connecting portion located at an intermediate portion thereof,
It is integrated. The connecting member 42 is formed with a female screw portion 43 extending in the lateral direction.

A screw rod 44 having a male screw portion formed on the outer periphery is screwed into the screw portion 43. Each end of the screw rod 44 is connected to a support plate 45 fixed to the lower member 31.
It is held rotatably and non-displaceable in the axial direction via a bearing 46. The bogie 41 is displaced, for example, leftward in FIG. 2 by, for example, rotating the screw bar 44 forward. vice versa,
By reversely rotating the screw rod 44, the carriage 41 is displaced, for example, to the right in FIG. The lateral displacement of the carriage 41 is regulated by strongly pressing the lock nut 47 screwed into the screw rod 44 against the support plate 45 (locked state). The end of the threaded rod 44 is formed as an engaging portion 44a having a cross section of an irregular shape (for example, a quadrangle) so that a rotary tool such as a manual type, a hydraulic type, or an electric type can be engaged so as not to rotate relatively. The rotating tool is engaged with the engaging portion 44a, and the screw rod 44 is rotated.

As shown in FIG. 4, a total of four rollers
They are arranged so as to be located at the four corners of the virtual rectangle. The center line of the cylinder device 20 is indicated by a symbol P, and the center line P is set at the center of the virtual rectangle when the carriage 41 is at a predetermined neutral position.

Each roller support member 41 rotatably holds a sprocket 51 as a toothed rotating body. Corresponding to the sprocket (gear) 51, the lower member 31 has a chain (rack) 52 as a long body with teeth.
Are extended and fixed in the lateral direction, and a chain (rack) 53 as a long body with teeth is also extended and fixed to the upper member 33. The sprocket 51 is always meshed with both chains 52 and 53, but the diameter of the sprocket 51 is set to a size that does not receive the load of the form support member 11. .

In the above embodiment, FIG.
The case where the carriage 40 (the roller 32), that is, the form support member 11 is at a predetermined neutral position is shown. From the state of FIG.
By rotating the screw rod 44, the carriage 40, that is, the roller 32 is rotated.
3 is displaced laterally by a length L to the left in FIG. 2 with respect to the lower member 31 in FIG. At this time, the roller 32 is rolled with respect to the upper and lower members 31, 33 to form the lower member 3.
1 or 2L for the rail 3 and the cylinder device 20
2 will be displaced laterally to the left in FIG. As described above, the lateral displacement amount of the roller 32 depends on the form support member 11.
In the lateral direction. in this way,
Since the lateral displacement of the roller 32 can be small,
The load from the form support member 11 via the roller 32 acting as a large bending force on the cylinder device 20 is reduced. This is the same when the carriage 40 is displaced rightward in FIG.

By the engagement of the sprocket 51 with the chains 52 and 53, the rolling of the roller 32, that is, the lateral displacement of the carriage 40 is transmitted to the form support member 11 with high accuracy. Also, the screw rod 4 by the lock nut 47 is used.
4 is controlled by the sprocket 51 by the chain 52.
The rotation of the sprocket 51 is restricted.
The lateral displacement of the upper member 33, that is, the form supporting member 11, which meshes with the second member 33 is regulated.

[0027]

Although the embodiment has been described above, the present invention is not limited to this, and includes, for example, the following case. The horizontal position adjusting device 15 is a vertical position adjusting device 1.
4 can also be arranged below. The number of rollers 32 is
It can be changed as appropriate. The type of the vertical position adjusting device 14 is not limited to the type shown in the embodiment, and may have an appropriate structure. In order to prevent displacement (rattle) in the rail longitudinal direction with respect to the lower member 31 of the upper member 33,
For example, as shown by a chain line in FIG.
When the rollers 3 abut against the rollers 32, flange-shaped stopper portions 31a and 33a that can abut each other in the rail longitudinal direction can be formed.

The screw rod 44 may be held on the carriage 40 so as to be rotatable and not displaceable in the axial direction, and may be screwed to the lower member 31. The lower member 31 of the screw rod 44
May be replaced by a relationship to the upper member 33 (assuming that the upper member 33 has a threaded connection with the threaded rod 44). The driving means for displacing the roller 32 in the lateral direction, that is, the position changing means, is not limited to the one shown in the embodiment, but may be any suitable one, for example, a type that does not use screws. However, a type in which the position is changed using a screw is preferable in terms of cost and simplification of the structure.

The lower member 31 is a member located on the rail 3 side, and need not necessarily be provided separately and independently of other members. Similarly, the upper member 33 is a member located on the form support member 11 side, and does not necessarily need to be provided separately and independently from other members. The function of the roller 32 is changed to a sprocket (gear) 5
1. Chains (rack) 52 and 53 may be used. In this case, the roller 32 shown in the embodiment is abolished, and the function of the roller 32 is assumed by the sprocket 51. Of course, in this case,
Since all the loads from the form support member 11 act on the sprocket 51, the sprocket 51 and the chains 52, 53
Is set to have sufficient strength (rigidity).
The purpose of the present invention is not limited to what is explicitly specified, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

[Brief description of the drawings]

FIG. 1 is an overall schematic diagram showing an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a vertical position adjusting device and a horizontal position adjusting device.

FIG. 3 is a view showing a state where a roller is displaced in a lateral direction from the state of FIG. 2;

FIG. 4 is a plan view showing details of a lateral position adjusting device, excluding an upper member.

5 is a cross-sectional view taken along line X5-X5 in FIG. 4, showing an upper member separated upward from a roller.

[Explanation of symbols]

 1: Tunnel 2: Formwork device 3: Rail 11: Formwork support member 12: Formwork member 12A: Upper formwork member 12B: Side formwork member 13: Running wheel 14: Vertical position adjustment device 15: Horizontal position adjustment Apparatus 17: Length adjusting member 20: Cylinder device (for vertical position adjustment) 31: Lower member 32: Roller 33: Upper member 40: Truck 41: Roller support member 42: Connecting member 43: Female thread portion 44: Screw rod 44a: Engaging part 45: Support plate (holding part) 46: Bearing (holding part) 47: Lock nut 51: Sprocket or gear (rotating body with teeth) 52, 53: Chain or rack (elongated body with teeth)

Claims (13)

[Claims] 1. A mold supporting member which can run on a rail provided along a longitudinal direction of a tunnel, and a mold member for forming an inner surface of a tunnel held by the mold supporting member. In a tunnel formwork device in which a frame support member is supported by the rail via a vertical position adjustment device for performing vertical position adjustment and a horizontal position adjustment device for adjusting a horizontal position intersecting with the rail, A lateral position adjusting device is interposed between the lower member on the rail side and the upper member on the form support member side, and is freely rollable with respect to the upper member and the lower member. A roller receiving a load from the form support member,
And a position changing means for changing a lateral position of the roller. 2. The vehicle according to claim 1, wherein the roller is rotatably held by a carriage which is relatively displaceable with respect to the lower member and the upper member, and wherein the position changing means comprises: A tunnel formwork connected to one of the lower member and the upper member, and the carriage being displaced in a lateral direction with respect to the one member by changing the connection state. apparatus. 3. The trolley according to claim 2, wherein the position changing means has a screw rod extending in a lateral direction and connecting the trolley to the one member. Is displaced laterally with respect to said one member. 4. The device according to claim 3, wherein the position changing means is provided on the bogie and to which the screw rod is screwed, and is provided on one of the holding members so that the screw rod is rotatable. And a holding portion for holding the shaft in such a manner that it cannot be displaced in the axial direction. 5. The apparatus according to claim 4, wherein said position changing means comprises:
A formwork device for a tunnel, further comprising a lock nut for restricting rotation of the screw rod with respect to the holding portion. 6. The screw rod according to any one of claims 3 to 5, wherein the threaded rod is formed with an engaging portion having a cross section of an irregular shape so that the rotary tool is engaged with the rotary tool so that it cannot rotate relatively. A formwork device for a tunnel, comprising: 7. The device according to claim 1, wherein the lifting device is a cylinder device that extends in a vertical direction, and the roller is positioned at least in a lateral direction so as to be positioned at four corners of a virtual rectangle. And one each in the longitudinal direction of the rail.
A total of four pairs are provided, and the center position of the cylinder device is located at the center position of the virtual rectangle when the form support member is at the horizontal neutral position. Formwork equipment. 8. The roller according to claim 1, wherein a rotation axis of the roller coincides with a direction in which the rail extends, and an outer peripheral shape of the roller is a perfect circle. A formwork device for a tunnel, wherein all loads from a formwork support member act on the rails via the rollers. 9. The trolley according to claim 2, wherein a rotating body with teeth is rotatably held by the carriage, and the lower member and the upper member extend in the lateral direction, respectively, and A tunnel formwork device, wherein a long toothed body engaged with a toothed rotating body is integrally provided. 10. The roller according to claim 9, wherein the outer peripheral shape of the roller is a perfect circle, and the load from the form support member acts on the roller but does not act on the toothed rotary member. A formwork device for a tunnel, characterized in that: 11. The cart according to claim 4, wherein the carriage has a pair of roller support members arranged at intervals in the longitudinal direction of the rail, and a connecting portion connecting the pair of roller support members. A plurality of the rollers are rotatably held in the respective roller support members at intervals in a lateral direction, and the screw portion is formed in the connecting portion, wherein a formwork device for a tunnel is provided. . 12. The toothed elongate member according to claim 1, wherein the roller is a toothed rotary member, and the lower member and the upper member respectively extend in the lateral direction and are engaged with the toothed rotary member. A formwork device for a tunnel, wherein a body is provided integrally. 13. The method according to claim 1, wherein:
In the paragraph, the mold member is divided into at least an upper mold member for forming a tunnel upper surface and a pair of left and right side mold members for forming a tunnel side surface in a tunnel circumferential direction; The member is integrated with the form support member, and the side form member is connected to the form support member via a length-adjustable rod-shaped length adjusting member. A formwork device for tunnels, characterized by: