JPH09177315A - Movement adjustment device in sliding form device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movement adjustment device for a support yoke or a form spacing which uses no electric motor. SOLUTION: A sliding form device is provided with a support yoke laid out on the lower part of a work floor beam, a pair of forms laid out on the lower part, a lift jack which is located between the forms and engaged with a jack rod built in concrete and lifts up a support jack along the jack rod and movement adjustment devices 44, 46 and 48. Each movement adjustment device is provided with a rack 50 which is movably laid out in one member which makes a relative motion, a hydraulic jack 54 which is connected to the rack 50, thereby reciprocating the rack, a gear 56 which turns reciprocatingly by the reciprocating motion of the rack 50, a spindle screw 62 which interlocks with the turning of the gear 56 and a nut 70 which is integrated with the other member 68b which makes a relative movement in the turning direction. This nut 70 is mounted on the other member 68b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding formwork apparatus for moving and adjusting each part of the sliding formwork apparatus using a hydraulic drive source.

[0002]

2. Description of the Related Art A sliding formwork method is adopted as a means for constructing a tubular structure. In this sliding formwork method, concrete is placed between a pair of forms supported by formwork yokes, and a reaction force is applied to the jack rod embedded in the concrete to raise the hydraulic jack. The frame yoke is lifted to remove the mold, and concrete is placed on the upper part of the mold continuously.

By the way, if the skeleton structure is linear,
Apart from those that do not change in diameter, when constructing structures such as chimneys whose diameter changes upward,
It is necessary to finely adjust the interval between the members in order to move the formwork yoke in the horizontal direction in addition to the upward movement and to change the concrete form space by adjusting the formwork space. As a mechanism for this movement adjustment, for example, there is a movement adjustment mechanism disclosed in Japanese Patent Laid-Open No. 6-2429. As shown in a part of FIG. 4, an electric motor 3 is arranged on a yoke beam 2 horizontally movably arranged under a work floor beam 1, and a gear 4 is rotated by the motor 3. A gear 4 is screwed into a spindle screw 5 fixedly arranged parallel to the work floor beam 1 to form a screw feed mechanism, and the yoke beam 2 is translated along the work floor beam 1 by this screw feed mechanism. It is a thing.

The movement adjusting mechanism is arranged in each part of the support yoke and is used for adjusting the diameter, adjusting the thickness between molds, adjusting the inclination angle of the mold, and the like.

[0005]

However, as described above, the sliding formwork apparatus mainly uses a hydraulic system drive source such as a jack, so that the electric movement is required for adjusting the movement of the support yoke and the formwork space. In the case of using a motor, there are drawbacks that it requires a long wiring for its own wiring and a labor for securing a power source, and maintenance is troublesome.

The present invention solves the above problems, and does not require an electric motor as a mechanism for movement adjustment, and can solve the problems associated with this, such as wiring and securing a power source. It is an object to provide a movement adjusting device in a sliding formwork device.

[0007]

In order to achieve the above-mentioned object, the present invention is directed to a support yoke arranged at the lower part of a work floor beam so as to be movable in the horizontal direction, and to face the lower part of the support yoke. A pair of molds arranged, and a lift jack that is located between the molds and that engages a jack rod built in concrete to raise the support yoke upward along the jack rod; In a sliding formwork apparatus provided with one or a plurality of movement adjusting devices for moving the support yoke laterally and adjusting the interval between the formwork according to the lifting operation by the lift jack,
The movement adjusting device includes a rack movably arranged on one of the members that move relative to each other, a hydraulic jack that is reciprocally connected to the rack, and meshes with the rack to rotate forward and backward by the reciprocating movement of the rack. Gear, a spindle screw that is arranged coaxially with the gear and that rotates in one direction only in conjunction with an arbitrary rotation of the gear in one direction, and that is integrated with the other member that moves relatively and that is screwed into the spindle screw. And a nut that moves in the axial direction in accordance with the rotation direction of the hydraulic jack, and the nut is attached to the other member that makes the relative movement. Fine movement adjustment is possible, and all movement adjustment can be performed only by the hydraulic control system.

[0008]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a sliding formwork device to which the present invention is applied. The formwork apparatus shown in the figure includes a support yoke 12 suspended and supported under a work floor beam 10 and a support yoke 1.
It is composed of a pair of inner and outer lower supporters 14 which are suspended and fixed to the lower part of 2.

The support yoke 12 is movably arranged in parallel directly below the working floor beam 10 and the yoke beam 1 and the yoke beam 1.
6, a pair of lower floor beams 18 arranged in parallel below and having scaffolding plates 18a on the upper surface, a pair of inner and outer struts 20 and 22 connecting the yoke beam 16 and each lower floor beam 18, and both lower floors A pair of molds 2 arranged to face the lower end of the beam 18
4 and 26, and a support stay 30 which is erected inside and outside each lower floor beam 18 and in which a handrail 28 is arranged in a direction orthogonal to the paper surface.

The support yoke 12 projects above the inside of the yoke beam 16 and is connected to the inner support column 20 by a brace 32a, and a suspension bracket portion extended above the outer support column 22. It is suspended and supported movably along the lower portion of the work floor beam 10 via 22a.

A connecting beam 3 is provided between the columns 20 and 22.
4 are arranged horizontally, and a lift jack 36 is fixed to the center of the connecting beam 34 at a required inclination angle. The lift jack 36 is built by penetrating through the center of the concrete C cast on the two molds 24, 26, and is inserted through the upper end of a jack rod 38 protruding above the concrete C. Along with this, the entire formwork device is raised.

Further, the molds 24 and 26 are fixedly arranged inside a pair of support frames 40 and 42 which are vertically connected to the connecting beam 34 and the lower floor beams, respectively.

A hydraulic drive type movement adjusting device 44 according to the present invention is provided on the yoke beam 16 in the vicinity of the suspension bracket 32 in the above-mentioned structure, and the lift jack raises the support yoke 12 to raise the support yoke 12. The entire support yoke 12 is moved in the radial direction.

The outer column 22 is guided so as to be movable along the yoke beam 16, and the concrete thickness (form 24, form 24, The gap 26 is connected to a movement adjusting device 46 for both adjustment and radial movement, and can be moved horizontally along the yoke beam 16.

Further, a support frame 42 for the outer mold 28
Is movable in parallel along the connecting beam 34 and moves horizontally in cooperation with a movement adjusting device 48 provided at the outer end of the connecting beam 34 for adjusting the concrete thickness (gap) d of the same structure as described above. It is possible.

That is, as shown by the arrow in FIG. 1, as the yoke is lifted by the lift jack 36, it is necessary to move it in the radial direction, which is the horizontal component of the diagonal direction thereof. By driving, the entire support yoke 12 moves along the work floor beam 10, and the decrease in the radial direction is dealt with. Also, the movement adjusting device 4
The outer support 22 does not move relatively only by driving 4 and the distance between the outer molds 28 increases, but by simultaneously driving the movement adjusting device 46 to move the same amount, the molds 26, 28 are moved. The gap d between them can be kept constant, and the load on each device 44, 46 can be reduced.

Further, when the concrete thickness d is arbitrarily adjusted, the outer support frame 42 and the form are horizontally moved along the connecting beam 34 by driving the movement adjusting device 48, and the thickness d is adjusted. It can be performed.

2 and 3 show the movement adjusting devices 44 and 4 described above.
6 and 48 show specific structures.

In the figure, this device is composed of a rack 50,
A guide sleeve 52 that slidably inserts the rack 50 and guides the rack 50, a hydraulic jack 54 arranged in parallel on the guide sleeve 52, and a guide sleeve 52.
A spur gear 56 rotatably engaged with the rack 50 on one end side of the spur gear 56, and a ratchet clutch 58 projecting from the center of the spur gear 56 and arranged on the back surface of the spur gear 56.
Spindle screw 6 that rotates in one direction in conjunction with the reciprocating movement of the rack 50 in conjunction with the inner rotating body (not shown)
2 is provided.

The hydraulic jack 54 has one end connected to one end of the guide sleeve 52 via a bracket 64, and a hydraulic cylinder 54a projecting to and from the other end of the hydraulic cylinder 54a and to the other end of the rack 50. Bracket 6
And a plunger 54b connected via 6.

The ratchet clutch 58 is, for example, as shown in Japanese Utility Model Publication No. 56-7704, an inner rotating body which is connected to an inner gear (not shown) formed on the inner surface of a spur gear,
A plurality of ratchet pawls that are biased in the protruding direction from the inner rotating body and mesh with the inner gear, and are interposed between the ratchet pawl and the inner gear according to the rotational position of the ratchet pawl and the inner gear. The spur gear 56 is provided with a switching ring that connects and disconnects the spur gear 56, and one of the spur gears 56 can be rotated in accordance with the reciprocating rotation of the spur gear 56, and the switching of the switching ring can be performed to change the rotation direction and stop the rotation. It was done like this.

The guide sleeve 52 shown in FIG.
As shown in FIG. 3, the spindle screw 62 is fixed on one member 68a that moves relatively, and the spindle screw 62 is screwed into a fixed nut 70 that projects from the other member 68b that moves relatively. The spindle screw 62 is rotated in one direction as the hydraulic jack 54 reciprocates, and the nut 70 and the other member 68 to which the nut 70 is attached are rotated.
b is relatively moved along the longitudinal direction of the screw 62.

Therefore, each movement adjusting device 44 (4
6 and 48), by repeating the reciprocating motion of the hydraulic jack 54, it is possible to move and adjust the entire supporting yoke 12 and its respective parts by a moving amount according to the screw pitch of the spindle screw 62. In addition to horizontal movement in the radial direction according to the amount of rise, it is possible to perform work such as adjusting the concrete thickness.

[0025]

As described above, according to the present invention, the relative movement between the members can be finely adjusted according to the piston operation of the hydraulic jack, and the movement can be adjusted only by the hydraulic control system. As a result, compared to the case of using a conventional electric motor, there is no need for dedicated wiring and securing of a power supply, and since piping and the like are integrated into one, there is an advantage that maintenance work is simplified. .

[Brief description of the drawings]

FIG. 1 is a side view of a sliding formwork device to which the present invention is applied.

2A and 2B are a plan view and a side view of the movement adjusting device according to the present invention.

FIG. 3 is a perspective view showing a relationship between the movement adjusting device and a member that relatively moves.

FIG. 4 is a partially enlarged view showing the relationship between a conventional movement adjusting device and a sliding formwork device.

[Explanation of symbols]

 10 Working Floor Beam 12 Support Yoke 24, 26 Form 36 Lift Jack 38 Jack Rod 44, 46, 48 Movement Adjusting Device 50 Rack 54 Hydraulic Jack 56 Spur Gear 62 Spindle Screw 68a (Relative Movement) One Member 68b (Relative Movement) Do the other member 70 Nut C Concrete

Claims (1)

[Claims] 1. A support yoke arranged at the lower part of the work floor beam so as to be movable in the horizontal direction thereof, a pair of molds arranged so as to face the lower part of the support yoke, and a space between the molds. There is a lift jack that engages with a jack rod built in concrete to raise the support yoke upward along the jack rod, and the support yoke moves laterally with the lift operation by the lift jack. In a sliding formwork device having one or a plurality of movement adjusting devices for moving to, and adjusting the interval between the forms, the movement adjusting device is movably arranged on one of the members that relatively move. A rack, a hydraulic jack connected to the rack for reciprocating movement, a gear that meshes with the rack and rotates forward and backward by the reciprocating movement of the rack, and is arranged coaxially with the gear. It is integrated with a spindle screw that rotates in one direction in conjunction with only arbitrary rotation in one direction, and the other member that moves relatively, and is screwed with the spindle screw to move in the axial direction according to the rotation direction of the spindle screw. And a nut, and the nut is attached to the other member that performs the relative movement.