JPH0141548Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a tightening/loosening device for tightening bolts for concrete column forming forms.

Conventionally, as a tightening/loosening device for tightening bolts for this type of formwork, devices described in Japanese Utility Model Publications No. 4531/1982 and Japanese Utility Model Publication No. 38341/1988 are known. Therefore, in each of these publications, a formwork divided into upper and lower parts is used as a formwork for forming a concrete column, and a mechanism for tightening and loosening the bolts by approaching or moving away from them is used. Are listed. That is, a horizontal frame of the device is provided that can move up and down above each tightening bolt that tightens the joint flanges of the formwork that is divided into two, and a bolt tightening/loosening unit is mounted on the horizontal frame of the device. It is known from this publication that the loose unit has a mechanism in which it is rotated by a drive mechanism. In such cases, it is expected that the tightening bolt will be tightened or loosened by the function of the sensor, etc.
It was still insufficient. Therefore, this invention has been devised so that the tightening/loosening action of the tightening bolt can be performed more quickly, reliably, and efficiently than those mentioned above, and the above-mentioned conventional technology is incorporated into the superordinate concept of the present invention. This is improved by providing a horizontal frame of the device that can move up and down above each of the tightening bolts that tighten the joining flanges of the vertically divided formwork, and a bolt tightening/loosening unit is mounted on the horizontal frame of the device. This bolt tightening/loosening unit is a forming formwork tightening bolt tightening/loosening device which is rotated by a drive mechanism to tighten/loose the tightening bolt. A spindle is connected via a flexible joint to the lower end of the shaft pivotally connected through the shaft, and a sleeve that attaches a socket to the lower end is fitted onto the spindle, and the sleeve is configured to allow the spindle to move within a predetermined range. furthermore, a compression spring is interposed in the lower part of the spindle, the lower part of the shaft and the flexible joint, and the upper part of the spindle and sleeve are covered with a swing regulating cylinder; Tightening and loosening of a tightening bolt for a concrete column building form, characterized in that the swinging movement of the socket connected via a joint and a spindle is restricted within a certain range by the swinging regulating cylinder. The aim is to provide the equipment.

An embodiment of this invention will be described below in detail with reference to the accompanying drawings. For convenience of explanation, conventionally known configurations and effects will also be explained at the same time. End plates 4, 4 are provided on front and rear vertical columns 2, 2 erected on a pedestal 1 via rollers 3, 3 so as to be movable up and down,
A device horizontal frame 5 is bridged and fixed to the end plates 4, 4, and the end plates 4, 4 are connected to pistons 7, 7 of the lifting cylinders 6, 6. And rollers 8, 8, 8, 8...
A formwork support stand 9 that pivotally supports the upper formwork 1 is provided below the machine horizontal frame 5, and the upper formwork 1 is transferred from another work site using a formwork transfer device 10 such as a crane or a transfer table.
1 and the lower formwork 12 are moved by rollers 8,
8... to tighten the left and right joining flanges 11a, 11a and 12a, 12a of the upper formwork 11 and lower formwork 12, respectively, on either the left or right side of the tightening bolts 14... Attach the bolt tightening/loosening unit 15 to the device horizontal frame 5 at the upper position.

As shown in FIG. 4, the bolt tightening/loosening unit 15 rotatably supports the shaft 17 by means of a bearing 16 attached to the horizontal frame 5 of the apparatus.
7 and the spindle 19 are connected by a connecting member such as a flexible joint 18 such as a universal joint as shown in the figure or a flexible wire that can transmit torque and is flexible in the axial direction, and a socket 20 is attached to the lower end. The sleeve 21 is attached to the large diameter portion 1 of the spindle 19.
9a, and the boss 21a at the bottom of the sleeve 21
The sleeve 21 is formed so that it can move up and down with respect to the spindle 19 along the key 22 over a stroke S (approximately 70 mm) until the sleeve 21 comes into contact with the lower end of the small diameter part 19b of the spindle 19, and the large diameter part 19
A retaining screw 23 that engages with the groove 19c provided in a.
is attached to the sleeve 21 to prevent the sleeve 21 from falling off the spindle 19. A compression spring 24 is interposed between the boss 21a and the lower end of the large diameter portion 19a, and a compression spring 24 is interposed between the lower end of the shaft 17, the flexible joint 18, the spindle 19, and the sleeve 2.
1 is covered with a swing regulating tube 25, and the flexible joint 1
8 and the socket 20 connected via the spindle 19, the swinging movement of the socket 20 is controlled within a certain range by the swinging regulating cylinder 25. Also, shaft 1
A torque limiter 26 for limiting the tightening torque to a constant value is attached to the upper part of the drive gear 29 which is driven by a motor 27 via a gear mechanism 28.
is the shaft 17 via this torque limiter 26.
I like to drive. That is, the illustrated torque limiter 26 has a boss 3 fixed to the shaft 17.
0 and a friction plate 31 affixed to the drive gear 29 are pressed together by a disc spring 32 whose tension can be adjusted freely, and the gear mechanism 28 is connected to the rotating shaft 33 of the motor 27 as shown in FIG. The drive gear 29 is directly driven by a pinion 35 integrated with a shaft 34 connected to the
Alternatively, a structure is adopted in which both are indirectly driven in the same rotational direction via the idle gear 36.

For example, in the molding work, the joining flanges 11a, 11a of the joined upper formwork 11 and lower formwork 12 are
and 12a, 12a, and when the pistons 7 are operated downward, the bolt tightening/loosening units 15 are rotated and moved downward together with the device horizontal frame 5, and the respective sockets 20 are moved downward. Since the socket 20 swings within the range of the swing regulating cylinder 25 via the flexible joint 18, even if there is a variation in the bolt position of the tightening bolts 14 of the upper and lower formworks, it is possible to absorb this variation while absorbing this. After each socket 20 is fitted into the tightening bolt 14 and the socket 20 moves downward until the compression spring 24 is sufficiently compressed to a size larger than the screwing amount of the tightening bolt 14, the piston 7... The tightening bolt 1 is tightened by stopping only the downward motion and continuing to rotate the shaft 17.
4..., and as the tightening bolt 14 moves downward, the compression spring 24 gradually extends toward its free length.
will always maintain a state in which it is fully fitted with the tightening bolt 14. This tightening work is performed with a constant tightening force by the torque limiter 26, and the tightening bolt 14 is
When the tightening force set at 6 is reached, the drive gear 29 will idle. When all the drive gears 29 start idling, this means that the tightening work has been completed, and the tightening work can be completed by moving the piston 7 upward and removing the socket 20 from the tightening bolt 14. become.

In addition, during the tightening work, each drive gear 29...
The idling operation of the sleeve 21 or the stopping operation of the sleeve 21 can be detected by a detector, and the motors 27 can be automatically stopped in conjunction with the above-mentioned operation of all the detectors, thereby further saving labor in operation. It is possible.

In addition, when loosening and returning the tightening bolts 14 during demolding work that divides the upper and lower formwork after forming a concrete column, by moving the pistons 7, 7 downward, the operation horizontal frame 5 can be moved. At the same time as the bolt tightening/loosening unit 15 moves downward, the spindle 19 of the bolt tightening/loosening unit 15 also moves downward while rotating at the same time.
8, spindle 19, and socket 20 swing within the range of the swing regulating cylinder 25, and tighten the bolt 14.
Each socket 20 is fitted into the tightening bolt 14 while absorbing variations in bolt position. When this insertion operation is completed, the pistons 7, 7 stop moving downward and the spindle 19 continues to rotate, the tightening bolt 14 gradually loosens and begins to come out, and gradually moves upward together with the socket 20. However, along with this upward movement, the compression spring 24...
is gradually compressed, and each socket 20 always remains fully fitted with the tightening bolt 14, so that the tightening bolt 14 completely comes out of the upper and lower forms.

If the formwork is of a type that allows the concrete column to be punched out, it is only necessary to tighten the joint flange on one side with the tightening bolt, so the bolt tightening/loosening unit 15... However, in the case of a type of formwork in which the concrete columns cannot be removed unless the upper formwork is completely separated from the lower formwork, tightening bolts should be installed at the joint flanges on both the left and right sides. In this case, the above-mentioned bolt tightening/loosening units 15 are provided in two rows on the left and right in the horizontal frame of the apparatus, so that the tightening/loosening work of the left and right bolts can be performed simultaneously. Also good.

As described above, the device for tightening and loosening tightening bolts for concrete column building formwork according to this invention is attached to the horizontal frame 5 of the device above each of the tightening bolts 14 for tightening and loosening the joint flanges of the formwork 13. Mount the bolt tightening/loosening unit 15... and insert the socket 20 of the bolt tightening/loosening unit 15.
is provided so that it can only move up and down within a certain range with respect to the spindle 19 against elasticity, and the socket 20 is driven by a drive mechanism 28, and
Since the structure is such that the horizontal frame 5 of the apparatus can be moved up and down by rotating while the oscillation is restricted within a certain range, the tightening bolts 14 on at least one side of the formwork 13 are powered. Each socket 20 is connected by a flexible joint 18 that can be tightened or loosened at the same time, and whose swing rotation is restricted within a certain range. Because it can be easily fitted into the mold even if the position of the mold is always the same, molding work or demolding work can be done more efficiently, quickly and reliably than with conventional types. It was.

[Brief explanation of drawings]

The drawings show one embodiment of this invention; FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a longitudinal sectional view of the bolt tightening/loosening unit. Explanation of symbols, 1... Frame, 2... Vertical column, 3, 8...
...Roller, 4...End plate, 5...Device horizontal frame, 6...
... Lifting cylinder, 7 ... Piston, 9 ... Formwork support stand, 10 ... Formwork transfer device, 11 ... Upper formwork,
12... Lower formwork, 11a, 12a... Joint flange,
13... Formwork, 14... Tightening bolt, 15... Bolt tightening/loosening unit, 16... Bearing, 17... Shaft, 18... Flexible joint, 19... Spindle,
19a...Large diameter section, 20...Socket, 19b...
...Small diameter part, 21...Sleeve, 19c...Groove, 2
2...key, 21a, 30...boss, 23...set screw, 24...compression spring, 25...oscillation regulating tube, 26...torque limiter, 27...motor,
28... Gear mechanism, 29... Drive gear, 31...
Friction plate, 32... Belleville spring, 33... Rotating shaft, 34
... shaft, 35 ... pinion, 36 ... idle gear, S ... stroke.

Claims (1)

[Scope of utility model registration request] The machine is equipped with a horizontal frame that can move up and down above each of the tightening bolts that tighten the joining flanges of the vertically divided formwork, and a bolt tightening and loosening unit is mounted on the machine horizontal frame to tighten and loosen the bolts. The unit is pivotally mounted to the side frame of the device via a bearing in a tightening/loosening device for a shaping formwork tightening bolt, which is rotated by a drive mechanism to tighten/loose the tightening bolt. A spindle is connected to the lower end of the shaft via a flexible joint, and a sleeve that attaches a socket to the lower end is fitted onto the spindle, and the sleeve allows the spindle to move up and down within a predetermined range. Further, a compression spring is interposed in the lower part of the spindle, and a swing regulating cylinder covers the lower part of the shaft, the flexible joint, and the upper part of the spindle and sleeve, and A device for tightening and loosening a tightening bolt for a concrete column forming formwork, characterized in that the swinging movement of the connected sockets is restricted within a certain range by the swinging regulating cylinder.