JPH0686047B2 - Formwork clamping device for concrete pillar production - Google Patents

Description

Description: [Industrial application] The present invention relates to a mold clamping device for manufacturing concrete piles and concrete columns.

[Prior Art] Generally, in the case of manufacturing a columnar body such as a cylindrical concrete pile or pole, as shown in FIG. 19, inside a lower formwork (K2) of a formwork (K) divided into upper and lower semicircles. After setting the core rebar cage to the core, filling it with fresh concrete, covering it with the upper mold (K1) and closing it, the flange (130) () on the outside of the split ends of the upper and lower molds (K1) (K2) ( 130), fasten the mold (K) at high speed, and centrifugally mold it. After steam curing, loosen the lower mold (K2) and the lower mold (K2) to form the upper mold. (K1) is removed, concrete columns such as piles are taken out and demolded.

Conventionally, as a fastening structure of the form (K), for example, the 20th
As shown in the figure, the upper and lower formwork (K1) (K2) flanges (13
There is a structure in which (0) (130) is fastened by a fastening bolt (131) fixed to one flange and a nut (132) screwed to the fastening bolt (131).

Further, as shown in FIG. 21, a hinge bolt (231) which can be freely rotated is provided on the flange (130) of one (mainly the lower) form, and the upper and lower forms (K1) (K2) are fastened. When the bolt (231) is raised, the nut (232) of the bolt head is screwed and fastened, and when the form (K) is dismantled, the nut (232) is loosened and the bolt (231) is removed. There was a structure in which the upper formwork (K2) was pulled down to remove it.

In the case of any of these fastening structures, fastening bolts,
That is, a large number of fastening points are arranged over the entire length of the formwork (K) for manufacturing a concrete pillar or the like. Particularly, the longer the formwork (K) is in the axial direction, the greater the number of installations. Performing the work manually using a fastener such as an impact wrench requires a lot of labor, time and labor.

Therefore, in recent years, it has been attempted to automatically operate a fastening tool such as an impact wrench to perform the work of fastening and loosening the mold, and various proposals have been made.

[Problems to be Solved by the Invention] However, in the conventional fastening device in which the fastening device is automatically operated, the fastening device provided in the fastening device extends over the entire length of the form (K). Rather than existing, it has a structure in which the number of molds is smaller than that of the molds to be fastened by fasteners, and the long molds (K) are sequentially fastened while moving in the axial direction.

Therefore, it is easy to detect the fastening position, fit the socket of the fastening device and the fastening nut, and adjust the fastening at each fastening point of the form (K) according to the movement of the form (K). Since the fastening is performed in order from the front end in the moving direction, the distortion of the mold (K) becomes closer to the rear end,
Alternatively, minute errors due to fastening are accumulated, and as a result, it is difficult to perform uniform and reliable fastening over the entire length.

Particularly, in the case of a formwork (K) of a pillar body such as a concrete pile that is long in the axial direction, it is necessary to fasten all the fastening points such as both ends and the central part of the formwork (K) at the same time. Although a tightly sealed state cannot be obtained, the conventional method has a drawback that concrete cannot leak from the mating surface of the flange during centrifugal molding because uniform and reliable fastening cannot be performed over the entire length.

The present invention has been made in view of the above, and its purpose is to:
It facilitates the fastening and loosening work of the formwork that manufactures concrete pillars, and it can be fastened uniformly and reliably over the entire length of the formwork, enabling the assembly of the formwork, the automatic dismantling, and the labor saving without problems. It is in the area of providing a fastening device.

[Means for Solving the Problems] The present invention is a device for fastening and unfastening a formwork for producing concrete columns, in which a formwork in which fasteners are arranged at appropriate intervals on the flanges of the upper and lower formwork is mounted. An elevator table that moves up and down is provided above the table, and a plurality of sets of fastening units that engage with the fasteners and can tighten or loosen the fasteners are provided on the elevator table so as to be movable only in the mold width direction. The fastening units are arranged at a predetermined interval over a length corresponding to substantially the entire length of the mold.

The fastening unit may be arranged over a length corresponding to substantially the entire length of the mold according to the arrangement pitch of the fasteners, or one set or a plurality of adjacent sets according to the plurality of the arrangement pitches. Each of them can be arranged over a length corresponding to substantially the entire length of the mold. Further, it is preferable that the mounting table is provided with a means for moving the mold in the axial direction so that the mold mounted on the mounting table can be moved within a range corresponding to several pitches of the fastener.

[Operation] According to the above-described fastening / loosening device of the present invention, even if the formwork for producing a concrete column body is long in the axial direction and a large number of fasteners are arranged over the entire length of both side flanges thereof, Simply place the formwork at a predetermined position on the mounting table, position the fastening unit in the width direction, and lower it to the formwork flange surface. Can be securely fitted to the head.

In particular, since the above-mentioned tightening / releasing unit is arranged over the length corresponding to the substantially entire length of the mold, the fastening points in the entire length of the mold, such as both axial end portions and the central portion of the mold, are entirely and simultaneously simultaneously. In addition, the fastening can be performed uniformly, and the distortion of the form and the uneven fastening due to the fastening do not occur. If the fastening units are arranged according to the arrangement pitch of the fasteners, all the fasteners existing in the entire length of the mold can be fastened at one time. Further, when performing the loosening work, the respective fasteners can be loosened all at once.

Further, the number of the fastening units is reduced, and one set or a plurality of adjacent sets are arranged in accordance with a plurality of arrangement pitches of fasteners. For example, two adjacent fasteners are provided as one fastening unit. Even when it is configured to be fastened by, since it is arranged over substantially the entire length of the formwork, over a length that fits, the fastening points in each part of the formwork length can be fastened at the same time, respectively. There will be no distortion of the formwork due to fastening or uneven fastening. Similarly, when loosening, the fasteners can be loosened uniformly over the entire length of the mold, and distortion of the mold does not occur.

Particularly, when the fastening unit is provided so as to fasten a plurality of fasteners by one fastening unit as described above, by providing the mounting table with the form moving means,
With regard to the fastening at the fastening points left after the fastening of the first time, after the mold is moved to a predetermined position according to the pitch of the fastener, the mold can be stationary and similarly fastened.

[Embodiment] Next, an embodiment of the fastening device of the present invention will be described with reference to the drawings.

In FIG. 1, (B) is a base beam, and the axial direction of the form (K) and the beam longitudinal direction are above the form (K) mounted and set on a mounting table described later. It is fixedly installed on a pillar or a foundation in the factory so that they match.
A hoist device (H) is provided on the upper surface of the base beam (B) to vertically move a fastening device (T), which will be described later, above the mold (K).

(2) is a geared motor that is a drive unit of the hoist device (H), and includes a rotating shaft (4) via a chain (3).
When the rotation is transmitted to, the winding member (7) such as a sprocket, a drum, or a pulley at the end of the rotating shaft (4) winds or loosens the chain (6) and moves the fastening device (T) up and down. In this case, a weight (8) can be attached to one end of the chain (6) to assist the lifting and lowering. A wire may be used instead of the chain as the chain (6).

(9a) is a gear provided on the shaft of the geared motor (2), (9b) is a driven gear meshing with the gear (9a), and both gears (9a) and (9b) are reverse to each other to form The two sets of winding members (7) in the axial direction are simultaneously operated.
(5) is a bearing, and (3a) is a sprocket.

Reference numeral (1) is a guide roller, and as shown in an enlarged view in FIG. 4, two rollers sandwiching a guide rod (11) of a fastening device (T), which will be described later, are paired to form a base beam (B). Are provided in a pair at the upper and lower positions on both sides of, and a plurality of sets are provided in the longitudinal direction according to the number of guide rods (11).

The fastening device (T) has the following structure, as shown in an enlarged scale in FIGS.

It has a lifting table (10) composed of a frame and the like, and a plurality of guide rods (11) standing upright on both sides thereof, and a fastening unit (S) is formed on the upper part of the lifting table (10). Moving tables (12a) and (12b) for moving in the width direction of the frame (K) are provided so as to form a pair on the left and right. This fastening device (T)
The lifting table (10) and the moving tables (12a) (12b) may be integrally formed with a length corresponding to the form (K), and the form (K) to be fastened as shown in the figure. ) May be divided into a plurality of groups in the axial direction. When splitting,
The hoist device (H) for raising and lowering the hoisting device and the guide rod (11) are separately arranged for each block of the lifting table (10).

The fastening unit (S) is supported by the moving tables (12a) and (12b) on the lift table (10) and is provided with two groups in the width direction of the mold frame. Even in the axial direction of the frame (K), the flange (3
The fasteners (G) arranged in 0), that is, the same number as the fastening points, are arranged at the same arrangement pitch over a length corresponding to substantially the entire length of the form (K).

In the present embodiment, a plurality of sets of movable tables (12a) corresponding to the respective elevators (10) divided in the axial direction of the form (K).
(12b) each has a plurality of fastening units (S) (S)
(S) is provided.

In addition, the number of the fastening units (S) is reduced to
As illustrated in the figure, one set or a plurality of adjacent sets are arranged in accordance with the plurality of arrangement pitches of the fastener (G), and for example, several places (for example, two places) adjacent to each other in the mold axial direction are provided. The fastener (G) may be fastened by one fastening unit (S). In this case, the mold (K) is moved in the axial direction as described later.

The moving tables (12a) and (12b) that support the fastening units (S) and (S) are screw shafts (16a) that are rotationally transmitted from the geared motor (14a) via the rotation transmission shaft (14b) and gears. And a moving table (12a) screwed onto this
The feed screw mechanism (16) including the screw member (16b) on the (12b) side is moved in the width direction of the mold (K), that is, both are moved toward and away from each other.
(13a) and (13b) are linear guide rails and linear bearings that support the moving tables (12a) and (12b) so that they can move accurately.

(15) is a position sensor, and a plurality of sets are installed on the elevator (10) according to the position of the fastener (G) of the form (K), that is, the position of the fastening point in the width direction, and the fastening is performed. The positions of the moving tables (12a) and (12b) that are moved and adjusted in the width direction according to the type of the mold (K) to be formed are detected.

As shown in FIGS. 6 and 10, the fastening unit (S) includes a drive unit (S1) which is rotationally driven by a hydraulic pressure such as air pressure and oil, and a rotary fastening unit (S2) connected therebelow. A rotation sensor (22a) for detecting the number of rotations of the drive shaft (22) and a pressure sensor (not shown) for detecting air pressure and the like are provided.

As shown in FIG. 10, the rotary fastening portion (S2) is configured such that the drive shaft (22), the spindle (24), the rotary shaft (26), etc. are housed in the outer pipe (20), and the spindle (24). Is held by the inner pipe (21) connected to the lower part of the drive shaft (22) in a spline shape so as not to come off, and the rotary shaft (26) is attached to the universal joint (2) with respect to the spindle (24).
It is swingably connected via 5). A socket (27) is provided at an end of the rotary shaft (26), and a socket (27) is fitted and engaged with a nut (32) provided on a head of a fastener (G) described later to transmit a rotation in a tightening or loosening direction. It is like this. (27a) is the locking part.

Reference numeral (20a) is a guide pipe provided so that the socket (27) can swing within a certain range.

A compression spring (23) is provided between the drive shaft (22) and the spindle (24) connected to the drive shaft (22) by spline fitting.
The spindle (24), that is, the socket (27) is urged downward by the elastic force of the compression spring (23) to move up and down within a certain range.

As shown in FIG. 5, a detection unit (28) is provided near an arbitrary fastening unit (S). This detector (28)
Is formed by being inserted into the guide pipe (28e) so as to move the rod (28d) up and down, and the rod (28d) has a fixed position detecting portion (28a), a flange detecting portion (28b), a fastening detecting portion ( 28c) are provided in order from the top.

Therefore, when the fastening unit (S) descends, the rod (28
When the detection plate (28f) provided at the lower end of d) comes into contact with the flange surface of the form (K) and the fastening unit (S) is further lowered, the above-mentioned detection sections (28a) (28b) ( 28
c) is detected by the sensor (29) at a position such as a proximity sensor provided in the fastening unit (S), and the fastening operation is accurately performed by the control device (F).

FIG. 16 shows another embodiment of the rotary fastening portion (S2),
In the case where the rotary shaft (26) is directly connected in a spline shape to the shaft portion on the lower side of the drive shaft (22) and the rotary shaft (26) is urged downward by the elastic force of the compression spring (23). Shows. Also in this case, the socket (27) swings within the manufacturing accuracy range of the spline-shaped connecting portion. Guide pipe (20
The fact that a) regulates the swing range is the same as in the above case.

The formwork (K) to be fastened consists of upper and lower formwork (K1) (K2) divided into two semicircular parts, and the body is provided with a plurality of centrifugal tires (40) at appropriate intervals in the axial direction. Flange (30a) (30b) is formed on each of the divided edges that are the mating surfaces of the upper mold (K1) and the lower mold (K2).

(41) is an end plate, (42) is the bottom side (lower side) of the form (K)
Is a seat provided on the upper and lower flanges (30a) and (30b) to be horizontal to support the form (K). (43) is a circular reinforcing flange (43).

Fastener (G) arranged on the flange of the form (K)
Has the following configuration in the embodiment shown in FIGS.

Reference numeral (31) is a fastening rod that is vertically supported by the flange (30a) of the upper mold (K1), and has a substantially rectangular (substantially rectangular) part at the lower end that partially projects in the rod radial direction. A stopper (31b) is provided, and a substantially rectangular nut (32) is screwed into the male screw portion (31c) formed on the body of the rod (31). Further, the fastening rod (31) is biased in the upward direction by the compression spring (33) mounted between the nut (32) and the flange (30a) on the outer peripheral portion thereof, and the compression spring (33) is urged by the compression spring (33). Protruding downwards,
That is, it can move downward. (31a) is the head that also functions as a stopper to prevent the nut from coming off, (32b) is the nut (32)
Is a spring seat arranged on the lower surface of the.

On the flanges (30a) (30b) of the upper and lower molds (K1) (K2),
The fastening rod (31) is provided with, for example, substantially rectangular fastening insertion holes (36a) (36b) having a shape substantially corresponding to the lower end portion of the fastening rod (31), and the locking portion (31b) of the fastening rod (31) is inserted. Hole (3
6a) (36b) can be inserted only when the rectangular shape is approximately matched, and if the direction of the locking part (31b) is changed by further rotating it, the protruding part wraps around the bottom surface of the flange (30b). It is constructed so that it cannot be inserted or pulled out.
In this embodiment, an elongated hole-shaped insertion hole is provided in the axial direction of the form (K), and the locking portion (31b) can be inserted only when the corresponding direction is matched. .

Further, a holding chamber (35) substantially corresponding to the locking portion (31b) is provided on the upper surface of the flange (30a) of the upper mold (K1), and the upper surface of the locking portion (31b) is provided on the holding surface (35a). Abut on the locking part (31
b) is configured so that it does not come out. That is, in the non-fastened state, the nut (32) and the holding chamber (35)
The fastening rod (31) is pulled up by the urging force of the compression spring (33) provided between the locking spring (33) and the locking portion (31b) to be housed in the holding chamber (35). At this time, it is desirable that the lower surface of the rod be slightly fitted in the insertion hole (36a). Further, in this state, the fastening rod (31) is inserted into the holding surface (35a) and the holding pipe (34) so that the upper mold (K
It is held perpendicular to the flange (30a) in 1). Therefore, it is not necessary to raise or collapse the formwork when it is fastened or disassembled.

Furthermore, the flange (30b) of the lower formwork (K2) has an insertion hole (3
6b) with the locking part (31b) penetrating, the fastening rod (31) moves in the nut tightening direction at the required angle (eg 90 °).
°) The locking part (31b) is locked when rotating, and the locking part (31b) is inserted through the insertion hole (36b) when rotating reversely.
Is provided with a stopper (37) for matching with. Therefore, when the fastening rod (31) rotates in the nut tightening direction, the locking portion (31b) abuts and engages with the stopper (37) to prevent further rotation, and the locking rod (31) rotates in the opposite direction. When (31b) matches the insertion hole (36b), further rotation is blocked.

(38) is the flange (30a) (3) of the upper and lower molds (K1) (K2)
The contact surface member for fastening 0b) at a constant interval, and (39) is a packing for preventing leakage of ready-mixed concrete or the like inside the form (K).

As shown in FIGS. 1 and 17, the mounting table (D) of the mold (K) is divided into a plurality of parts in the axial direction of the mold (K), and each mounting table (D) is installed. A transfer machine (R) such as a loader is provided between them so as to enter and exit from a direction perpendicular to the mounting table (D).

The transfer machine (R) such as a loader, as shown in FIG. 2, is a hydraulic means for moving up and down while the traveling means and the form (K) are placed,
An elevating means (57) composed of a pneumatic cylinder or the like is provided, and while the formwork (K) is supported above the mounting table (D), it enters the line of the mounting table (D) and moves up and down at a predetermined position. Then, the form (K) is lowered onto the mounting table (D) and transferred.
(58) is a transfer machine (R) is a running wheel, (59) is a rail. Instead of the transfer machine (R), the form (K) may be transferred by hanging with a crane or the like.

As shown in FIG. 1, the roller (5
0) is installed and the slide base (52)
Is provided, and the mold (K) is placed on the slide base (52) via the seat (42) of the mold (K) described above.

A push-pull cylinder (51) is connected to the bottom of the slide base (52) as a form moving means. By pushing and pulling with the push-pull cylinder (51), the form (K) is moved together with the slide base (52). It is provided so as to move in the axial direction.

In this case, the amount of movement of the form (K) is of a length corresponding to several pitches of the fasteners (G) provided on the flange at a constant array pitch (length equivalent to several places of the fasteners). Move within range.

That is, for example, as shown in FIG. 17, when one fastening unit (S) is provided at two fastening points by the fastener (G), it is moved by one pitch and one at three fastening points. When fastening with the fastening unit (S), 2
It is configured to be moved sequentially every one pitch.

As described above, in addition to the case where the slide table (52) is provided on the roller (50) of the mounting table (D) so that the mold (K) can be accurately moved at a fixed position in a fixed direction, Instead of the roller (50), it may be slidably provided by a linear guide (53a) and a linear bearing (53b) as shown in FIGS. 8 and 9. Furthermore, the mold (K) may be moved by a roller conveyor that is rotationally driven by a motor or the like. In this case, push-pull cylinder (5
1) is unnecessary.

(54) is a stopper, which is provided so that the mold (K) stops at a predetermined position when the mold (K) is moved by the push-pull cylinder (51), and (55) is Formwork (K)
Is a guide provided so as to move with accuracy in the axial direction.

The position sensor (56) detects the axial position of the mold (K) and detects the movement of the mold (K), that is, the stop position. (60) is a position sensor for detecting the widthwise position of the form (K), and confirms whether or not the form (K) is placed on the mounting table (D).

As shown in the control block diagram of FIG. 18, the control device (F) controls the operation of the drive device based on the detection signal from the sensor or the like, and automatically performs the work of fastening or loosening the form (K). Composed. The block diagram of FIG. 18 shows a control state at the time of fastening by a device in which one fastening unit (S) is arranged for two fasteners (G) adjacent to each other in the mold axis direction.

The operating state of the fastening device will be described below.

When the formwork (K) is fastened, it is performed as follows.

First, fresh concrete is filled inside the form (K),
The formwork (K) with the rebar cage set is detected by the position sensor (60) and placed at a predetermined position on the mounting table (D) by the transfer machine (R) such as a loader. The upper and lower molds (K1) (K2) of this mold (K) are flanges (30a) (30
It has been put together in b) and has not been concluded yet.

The type of form (K) (especially the size of the form (K))
Information has already been input to the control device (F), and the moving tables (12a) (12b) are operated according to the intervals between the fasteners (G) (G) on both sides of the formwork (K), The pair of fastening units (S) (S) are moved to a predetermined position.

Next, the gear motor (2) is driven to move the lifting table (10) of the fastening device (T) downward toward the form (K), and the fastening unit (S) is lowered.

Due to this lowering, the detection plate (28f) at the lower end of the rod (28d) of the detection portion (28) provided near the fastening unit (S) contacts the surface of the flange (30a) of the upper mold (K1). The flange detector (28b) is detected by the position sensor (29), the form (K) is detected at a predetermined position, and the fastener (G) is also at a normal position, and a signal is sent to the control device ( Call F).

When the elevator table (10) is further lowered, the fastening unit (S) is lowered and the socket (27) at the tip of the fastening unit (S) engages with the nut (32) of the fastener (G). . In this case, another nut detector may be provided to detect the position of the fastener (G).

When the fastening unit (S) is further lowered in this state, the fastening rod (31) is pushed downward by lowering the nut (32), and the locking portion (31b) at the lower end of the fastening rod (31). Is inserted through the insertion holes (36a) (36b) of the flanges (30a) (30b) from the upper and lower molds (K1) (K2).
The confirmation of the insertion is performed by detecting the fastening detection unit (28c) by the position sensor (29).

In this state, the fastening unit (S) is driven to rotate the rotary shaft (26).
When the nut is rotated, the nut (32) engaged with the socket (27) is rotated, and the fastening rod (31) is rotated by the downward force and frictional force applied to the nut (32) by the rotation of the nut (32). Also rotates. As a result, the locking portion (31
b) is rotated by the required angle, and the flange (30 mm) of the lower formwork (K2) is rotated.
It goes around the lower surface of b) and abuts and locks against a stopper (37) provided on the lower surface, and further rotation is blocked.

Therefore, when the fastening unit (S) continues to rotate further, the fastening rod (31) is held in a state where the lower end locking portion (31b) is locked to the lower surface of the flange (30b), and the nut (32) is screwed in. , The upper and lower flanges (30a) (30b) are fastened. At this time, the tightened state is firmly held by the elastic force of the compression spring (23).

In this case, the fastening degree can be confirmed by checking the rotational speed of the drive shaft (22), the rotary shaft (26) of the fastening unit (S) or another rotary shaft in the drive unit (S1), for example, the rotation sensor (22a). It is performed by detecting by. That is, as the nut (32) is screwed in, the tightening force, that is, the torque increases and the rotation speed decreases, which is detected. Further, a pressure sensor may detect a change in the pressure of air or oil used as a drive source.

The fastening unit (S) is a fastener (G) of the formwork (K).
In contrast, if the sockets (27) are provided corresponding to each other, the fastening work is completed by removing the sockets (27) from the nuts (32) and raising the elevating table (10).

Further, for example, as shown in FIG. 16, one fastening unit (S) for two adjacent fasteners (G) in the mold axial direction.
If the fastener (G1) shown in FIG. 8 is completed, the socket (27) of the fastening unit (S) is removed from the fastener (G1) and lifted up and down. The tool (G2) is moved up together with the platform (10), and the push-pull cylinder (51) is operated, so that the fastener (G2) becomes the fastening unit (S).
The mold (K) is moved in the axial direction so as to be located below the. This movement stop position is detected by the position sensor (56).

The fastening work to the fastener (G2) may be performed in the same manner as above, and when the fastening work for all the fasteners (G) is completed in this way, the lifting table (10), that is, the fastening unit (S) is lifted. Then, the push-pull cylinder (51) returns the mold frame (K) to the original position, and then the transfer machine (R) sends the mold frame (K) to the next step.

In addition, since a plurality of sets of fastening units (S) (S) forming a pair in the width direction are arranged over substantially the entire axial length of the form (K), the fastener (G) formed by the fastening unit (S). ), For example, all the fasteners (G) in the axial direction are simultaneously fastened, and the fasteners (G) at the required positions such as both axial end portions and the central portion are fastened first, and then left in order. Fastening the fasteners (G) at different locations can also be done by biasing the fasteners (G) arranged axially by 1/2 or 1/3 of every few fasteners (G) on either side in the axial direction. It is also possible to conclude in order without.

Particularly, in the conventional method of sequentially fastening from one axial end of the mold (K), the upper and lower molds (K1) (K2) may be deformed due to distortion of the mold (K), manufacturing error of the fastener (G), and the like. Flange (30a) (30
Although it is difficult to firmly fasten and tightly seal b), the apparatus of the present invention described above enables uniform fastening over the entire length of the mold.

The case where the formwork (K) is fastened has been described above, but when removing the product (concrete body) after centrifugal molding and steam curing, the upper formwork (K1) is removed from the lower formwork (K2) to remove the formwork. Frame (K)
Remove the concrete body from the inside.

The loosening operation of the fastener (G) in this case is performed as follows when the fastening device of the present invention is used.

The mold (K) containing the concrete body molded inside is placed at a predetermined position on the mounting table (D) by the transfer machine (R). In this case, the fastening unit (S) is preliminarily moved and adjusted to a predetermined position in the width direction of the mold (K) by the controller (F) according to the type of the mold (K), and the fastening by the fastener (G). It corresponds to the position.

Then, drive the geared mode (2), and lift (10)
Is moved downward toward the mold (K), and the fastening unit (S) is lowered.

As a result, the socket (2
7) engages the nut (32) of the fastener (G). At this time, the detection of the flange surface by the position sensor (29) and the position of the fastener (G) are performed by the same operation as in the case of the fastening operation.

In this state, drive the fastening unit (S) to rotate the rotary shaft (26).
When is rotated in the nut loosening direction contrary to when tightening the nut, the nut (32) engaged with the socket (27) rotates and is added to the nut (32) as the nut (32) rotates. The fastening rod (31) also rotates due to the upward force and frictional force of the compression spring (33), and the locking portion (31b) at the lower end.
Rotates in the opposite direction to that when tightened, and when the corresponding shape and direction of the insertion hole (36b) of the flange (30b) of the lower formwork (K2) corresponding to this is reached, the locking part (31b) The stopper (37) is also brought into contact with and locked to prevent further rotation of the rod (31).

Therefore, when the fastening unit (S) is moved upward while continuing to rotate, the nut (32) moves upward, and the fastening rod (31) also moves upward due to the elastic force of the compression spring (33), so that the locking portion ( 31b) starts with the lower formwork (K2) flange (3
0b) through the insertion hole (36b) to the upper side, and further, the insertion hole (36a) of the flange (30a) of the upper mold (K1) is pulled out from the lower surface to engage the holding surface (35a), and the holding portion ( 35) retained within. Therefore, the locking portion (31b) of the fastening rod (31) does not project to the flange facing surface, although it is held by the flange (30a) of the upper mold (K1).

In this case, the position of the fastening rod (31) and the upward movement of the fastening unit (S) are detected by the fixed position detection unit (28a), the flange detection unit (28b), the fastening detection unit (28c), etc. This is similar to the case of the above-mentioned fastening.

In this state, if the fastening unit (S) is detached from the fastener (G) and raised, the loosening work is completed, and the work is sent to the process next to the form (K) by the transfer machine (R) or the like.

In the next step, the upper formwork (K1) is removed, and the concrete body is hung to remove the mold.

In addition, the above-mentioned tightening / loosening device is a fastener (G) for the mold (K).
The present invention can be applied not only to the case of the structure of the illustrated embodiment but also to a fastener similar to the conventional one.

[Effects of the Invention] According to the above-described fastening and loosening device of the present invention, there are the following effects.

A plurality of sets of fastening units, which are paired in the width direction of the form and movable only in the width direction, are arranged over a length corresponding to substantially the entire length of the form. Even if the formwork is long, it is possible to move it to the formwork flange surface without moving the formwork placed on the mounting table, as long as the fastening unit is aligned in the formwork width direction. The fastening unit can be securely engaged with the fastener. For example, the socket of the fastening unit can be securely fitted to the nut of the fastening portion.

Therefore, the fastener and the fastening position, the position fastening state and the loosening state can be easily detected, and the fitting and the like operations can be easily performed, so that the fastening work can be efficiently and reliably performed.

In particular, since the fastening units that make a pair in the form width direction are arranged over the length corresponding to the substantially entire length of the form, the entire length of the form such as the widthwise both ends and the central part of the form are entirely Moreover, since they can be fastened at the same time, in addition to improving the fastening efficiency, there is no distortion of the formwork due to fastening or unevenness of the fastening, and a reliable tightly sealed state can be obtained. Therefore, the flanges are aligned during centrifugal molding of the formwork. There is no risk of concrete leaking from the surface. Further, during the loosening work, the respective fasteners can be simultaneously and efficiently loosened simultaneously, and the fasteners are not unduly strained.

Further, the number of fastening units is reduced, and one set or a plurality of adjacent sets are arranged in accordance with a plurality of arrangement pitches of fasteners. For example, two adjacent fasteners are fastened by one fastening unit. Even in such a case, since it is arranged over a length corresponding to the substantially entire length of the formwork, it can be fastened at the same time and uniformly as a whole, and like the above, distortion of the formwork due to fastening and uneven fastening It is possible to securely fasten and seal without causing such as.

Further, since the mold frame axial moving means is provided on the mounting table of the mold, the fastening of the fastening points left by the first fastening is performed at the position determined by the pitch of the fastener. Since the mold can be held stationary after the mold is moved to the same position, the tightening operation such as detection of the tightening position and fitting of the socket of the fastener and the tightening nut can be easily performed without any problem.

Therefore, according to the present invention, it is possible to promote the labor saving and automation of the fastening and loosening work (assembling and disassembling) of the concrete column manufacturing formwork, and there is an effect of improving the manufacturing efficiency.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a fastening and loosening device of the present invention,
FIG. 2 is a schematic front view showing the mounting table of the same as above, and FIG.
FIG. 4 is a plan view of the above base beam, FIG. 4 is an enlarged cross-sectional view of a guide rod portion, FIG. 5 is an enlarged side view of a portion of a fastening device portion, and FIG. Vertical front view of
FIG. 7 is a partial plan view of the same as above, FIG. 8 is a partially cutaway side view showing an enlarged view of the mold moving means in the mold placing table, and FIG. 9 is a front sectional view of the same. FIG. 10 is an enlarged vertical sectional view showing a fastening unit and a fastener, FIG. 11 is a vertical sectional view showing a state in which the fastening unit in the same is lowered, and FIG. 12 is a vertical sectional view in which the same fastening is completed, and FIG. Fig. 13 is a sectional view taken along the line 13-13 in the previous figure, Fig. 14 is a sectional view taken along the line 14-14 in the previous figure, Fig. 15 is a plan view from below the locking portion, and Fig. 16 is rotational fastening of the fastening unit. FIG. 17 is a cross-sectional view showing another embodiment of the part, FIG. 17 is a schematic side view of the entire fastening / loosening device showing an embodiment in which a fastening unit is provided every several pitches of fasteners, and FIG. 18 is a control state during fastening. FIG. 19 is a cross-sectional view illustrating the formwork structure, FIG. 20 is a partial perspective view showing a conventional fastening structure, and FIG.
The figure is a side view showing another conventional fastening structure. (Description of symbols) (B) ... Base beam, (D) ... Mounting table, (F) ... Control device, (G) ... Fastener, (H) ... Hoist device, (K) ... Formwork, (K1) ) ... Upper mold, (K2) ... Lower mold, (R) ... Transfer machine, (S) ... Fastening unit, (S1) ... Driving part, (S2) ... Rotating fastening part, (T) ... Fastening device , (1) ... Guide roller, (10) ... Lifting table, (11) ... Guide rod, (12a) (12b) ... Moving table, (15) ... Positioner, (16) ... Feed screw mechanism, (20) … Outer pipe, (22)… Drive shaft, (23)… Compression spring, (24)… Spindle, (26)… Rotation shaft, (27)… Socket, (28a) (28b) (28c)… Detection part, (29) ... Position sensor, (30a) (30b) ... Flanges of upper and lower molds, (31) ... Fastening rod, (31b) ... Locking part, (32) ... Nut, (33) ... Compression spring, (35) ) ... holding chamber, (37) ... stopper , (36a) (36b) ... upper and lower flange fastening through holes, (42) ... formwork seat, (43) ... reinforcing flange, (51) ... push-pull cylinder, (52) ... slide base, (54 ) ... Stopper, (55) ... Guide, (56) ... Position sensor, (57) ... Elevating means, (58) ... Running wheel, (59) ... Rail, (60) ... Position sensor.

Front Page Continuation (72) Inventor Susumu Hattori 2-10-10 Koraibashi, Chuo-ku, Osaka City, Osaka Takeuchi Engineering Co., Ltd. (72) Inventor Shojiro Hayasaka 2-10-10 Koraibashi, Chuo-ku, Osaka City, Osaka Stocks Takechi Industrial Co., Ltd. (56) Reference JP-A-52-23121 (JP, A)

Claims (4)

[Claims] 1. A lifting platform that moves up and down is provided above a mounting table on which molds in which fasteners are arranged at appropriate intervals are mounted on the flanges of the upper and lower molds. A plurality of sets of fastening units capable of engaging with and tightening or loosening the tool are provided so as to be movable only in the mold width direction, and the fastening units are arranged at predetermined intervals over a length corresponding to substantially the entire length of the mold. An apparatus for tightening and loosening a formwork for producing concrete columns, which is characterized by being installed. 2. The tightening and loosening of a concrete pillar manufacturing formwork according to claim 1, wherein the fastening unit is arranged over a length corresponding to substantially the entire length of the formwork in accordance with the arrangement pitch of the fasteners. apparatus. 3. The fastening unit is arranged such that one set or a plurality of adjacent sets according to a plurality of arrangement pitches of fasteners are arranged over a length corresponding to substantially the entire length of the mold. The fastening device for a concrete column manufacturing form described in. 4. The mounting table is provided with means for moving the mold in the axial direction so that the mold mounted on the mounting table can be moved within a range corresponding to one to several pitches of the fastener. The fastening and loosening device for a concrete column body manufacturing form according to any one of 3 to 3.