JPH0542318U - Lifting device for self-propelled formwork equipment - Google Patents

Abstract

(57) [Summary] [Objective] The present invention relates to a lifting device for a self-elevating formwork device used when constructing concrete dams and other large-scale concrete structures. It is an object of the present invention to provide an elevating device for a self-elevating formwork device, which is provided with a height adjusting device for holding the elevating device horizontally in order to absorb it. [Structure] Formwork support 11 that supports a formwork for pouring concrete and is provided with a seabolt that is detachably engaged with an anchor bolt embedded in a side wall of concrete, and a reaction force between an upper surface 30a of concrete. In the elevating device 10 of the self-elevating formwork apparatus, which is formed by an elevating device 13 that is vertically expandable and contractible to elevate the frame support body, independently expands and contracts to the lower frame 14a of the elevating device. It is due to the provision of a free height adjustment device.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lifting device in a self-elevating formwork device used when constructing a concrete dam or other large-scale concrete structures.

[0002]

[Prior Art]

 Conventionally, when building the above-mentioned mass concrete structure, various formwork devices have been developed due to demands for labor saving and work safety. In particular, the ingenuity has been made so that the formwork itself can be raised. For example, there are the following relating to the applicant of the present application.

A self-propelled formwork apparatus 10 shown in FIGS. 3 to 5 roughly includes a formwork support 11 including a formwork 11 a for placing concrete, and swinging with respect to the formwork support 11. It comprises a flexible support frame 12 and an elevating device 13 for raising the mold support 11 through the support frame 12.

As shown in FIG. 4, the frame support body 11 is a frame that is assembled by vertical end thick materials 18, 18, 18 made of a U-shaped steel material, cross bars 19, ... And a reinforcing material 20. It is a body, and the frame 11a is fixed to the frame via a support beam 11b.

Further, the frame body is provided with a guide roller 11c for moving the concrete side wall surface, and a jack 11d for retracting the guide roller toward and away from the concrete side wall 30b, and the frame frame 11a of the frame body is made of concrete. A peeling jack 11e is provided to be separated from the side wall surface.

[0006] Further, the frame of the formwork support 11 is provided with a sea bolt 16 whose tip is detachably engaged with an anchor bolt 17 embedded in a concrete side wall 30b.

Next, the support frame 12 is pin-coupled 21 at a lower portion 12 a of the support frame 12 and an upper portion of the mold frame support body 11 and is swingable. Further, a lock device for locking the swing of the support frame 12 by the engagement of a claw or the like (not shown) is also provided.

As shown in FIG. 3 or 5, the elevating device 13 is composed of a pair of expansion / contraction mechanisms 14, 14, and the lower frame 14a has a hydraulic jack when the formwork 11a is raised or concrete is poured. The rod 14c of 14b is expanded and contracted in the vertical direction by the expansion and contraction of the rod 14c, and the pair of expansion and contraction mechanism portions 14 and 14 are rotated about 90 degrees around the engaging portion 22 with the support frame 12 to support each other with the form. The structure is such that it is superimposed on the body 11 side.

As shown in FIG. 3, the structure of the expansion / contraction mechanism 14 of the lifting device 13 is such that an I-shaped steel is cut to an appropriate length and an upper frame 14d and a U-shaped steel material are downwardly U-shaped. The lower frame 14a to be installed is disposed so as to face each other, and between them, rotary bars 14f and 14g which are X-shaped and can be freely opened around a fulcrum 14e, and a hydraulic jack for rocking the rotary bar 14g. 14b as main constituent elements.

One end of the rotating bar 14f is rotatably supported on the upper frame 14d by a shaft 14j, while the other end of the rotating bar 14f freely rolls on the upper surface of the lower frame 14a. 14k is pivoted.

One end of the rotating bar 14g is axially supported by the lower frame 14a, and one end of the rotating bar 14g is rotatably supported by a rotatable roller 14m. The roller 14m is connected to the upper frame 14d. It is adapted to roll on the upper surface 14n of the lower flange. Further, the tip of the rod 14c of the hydraulic jack 14b rotatably attached to the lower frame 14a is rotatably connected to the middle of the main body of the rotating bar 14g.

A guide cylinder 14p for vertical movement is provided at the tip of the upper frame 14d, and a guide rod 14r inserted into the guide cylinder 14p is erected from the tip of the lower frame 14a.

Further, on the lower surface of the lower frame 14a, a cushioning member 23 made of an elastic material such as rubber and having a flat plate shape and a triangular protrusion on the bottom surface is fixed at three positions at appropriate intervals. The cushioning material 23 serves as a slip stopper for the elevating device 13, and also serves to absorb the inclination of the concrete placing surface 24 due to the unevenness and to keep the lower frame 14a horizontal.

Reference numeral 14s shown in FIGS. 3 and 5 indicates a drive unit for driving the fine height adjustment device 15, the hydraulic jack 14b, and a cylinder 25 described later.

Next, the height fine adjustment device 15 interposed between the elevating device 13 and one end of the support frame 12 is driven by the drive unit 14s to move the supporting frame 12 in the up-down direction of the supporting frame 12. The height of the mold 11a of the mold support 11 connected to the lower part of the support frame 12 is finely adjusted by changing the relative position of the mold.

Further, reference numerals 26 and 27 shown in FIG. 5 indicate, as a frame constituting the elevating device 13, when the pair of overlapping telescopic mechanism parts 14 are opened from the support frame 12 by approximately 90 °, the telescopic mechanism. A support rod is shown that is installed between the parts 14 and 14 to stabilize it.

A method of using the self-raising mold device 10 thus formed will be described with reference to FIGS. 6 to 8. FIG. 6A shows a state in which the mold 11a of the self-propelled mold making apparatus 10 is moved up and down. Reference numeral 28 indicates concrete which was cast last time and solidified to the required strength.

Next, as shown in FIG. 6B, the anchor bolt 17 having one end opened and embedded in the concrete 28 is driven by a motor 29 (see FIG. 3) from the formwork support body 11 to remove the seabolt 16. The mold support 11 is supported by being inserted.

Then, the support rods 26 and 27 are detached, the rods 14c of the hydraulic jacks 14b of the pair of expansion / contraction mechanisms 14 of the lifting device 13 are retracted by operating the drive unit 14s, and the lower frame 14a is raised.

Next, as shown in FIG. 6C, the pair of expansion / contraction mechanism portions 14 and 14 are rotated by approximately 90 ° in the direction of the support frame 12 to be superposed and stored. Then, an anchor bolt 17 for dummy is fixed to the concrete placing surface side of the formwork 11a with a nut or the like.

Then, as shown in FIG. 7A, fresh concrete 30 is poured. When the concrete 30 reaches a predetermined strength, as shown in FIG. 7B, the pair of extending and contracting mechanism portions 14 and 14 which are overlapped with each other are opened by approximately 90 °. Further, the rod 14c of the hydraulic jack 14b of the expansion / contraction mechanism 14 is extended to lower the lower frame 14a to the upper surface 30a of the concrete 30 so as to abut.

After that, in order to stabilize the lifting device 13, the support rods 26 and 27 are installed between the expansion and contraction mechanism portions 14 and 14. Then, as shown in FIG. 7C, the motor 29 is operated to disengage the sea bolt 16 from the anchor bolt 17 to release the engagement, and the peeling jack 11e of the frame support 11 is extended to extend the frame 11a. From the side wall of the concrete 30. At this time, the anchor bolts 17 buried in the concrete 30 are left in the concrete 30.

Next, the jack 11d of the formwork support 11 is operated to bring the guide roller 11c into contact with the side wall 30b of the concrete 30. From this state, the hydraulic jack 14b of the expansion / contraction mechanism section 14 is operated, and a reaction force is applied to the upper surface 30a of the concrete 30 by the lower frame 14a.

Then, as shown in FIG. 8A, the rotating bars 14f and 14g rise in an X shape, and the mold 11 rises accordingly. Since the weight of the lifting / lowering device 13 is about three times the weight of the entire formwork support 11, there is no risk of the lifting / lowering device 13 wobbling when the formwork support 11 is raised.

In this way, as shown in FIG. 8B, the form support 11 is raised by a predetermined amount to stop the operation of the elevating device 13. At this time, the sea bolt 16 of the frame support 11 is aligned with the anchor bolt 17 embedded in the concrete 30 in a horizontal position.

When the height of the frame support 11 is displaced from a predetermined position, the height fine adjustment device 15 interposed between the support frame 12 and the elevating device 13 is installed in the drive unit 14s. The height of the mold support 11 is finely adjusted by driving with. In this way, the state shown in FIG. 6A is returned to again and the above-described work is repeated. There is a self-propelled formwork device that constructs mass concrete bodies such as dams in this way.

[0027]

[Problems to be solved by the device]

 However, in the above-mentioned automatic formwork equipment, since the lifting device is placed on the top surface of the concrete that was cast last time and the formwork support is raised, the lifting device is placed horizontally and stably on the top surface of the concrete. Must. However, the top surface of the concrete that was cast last time has many uneven surfaces (referred to as unevenness), and the unevenness may not be completely absorbed by the triangular peaks of the cushioning material 23 of the lifting device 13. . As a result, the form support 11 is raised while the lifting device 13 remains tilted, so that the form support 11 also tilts and the lifting work cannot be performed smoothly.

The present invention has been made in view of the above problems, and in order to completely absorb unevenness on the upper surface of concrete, the self-propelled frame equipment provided with a height adjusting device for holding the elevating device horizontally. It is an object of the present invention to provide a lifting device for a stationary device.

[0029]

[Means for Solving the Problems]

 The gist of the present invention to solve the above problems and achieve the above objects is to provide a sea bolt that supports a formwork for concrete pouring and is detachably engaged with an anchor bolt embedded in a side wall of concrete. In a lifting device for a self-elevating formwork device, the lifting device for lifting the formwork support is configured to be vertically expandable and contractible by taking a reaction force on the upper surface of concrete. This is because the lower frame of the lifting device is provided with a height adjusting device that can be independently expanded and contracted.

[0030]

[Action]

 According to the elevating device of the self-elevating formwork device of the present invention, the inclination of the ascending / descending device due to the unevenness of the concrete top surface is leveled by appropriately expanding and contracting by independently operating the height adjusting devices by the drive unit. can do.

[0031]

【Example】

 Next, an embodiment according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a self-elevating formwork device according to the present invention, and FIG. 2 is an enlarged front view and a plan view of a height adjusting device of a lifting device. In the figure, reference numeral 1 is a hydraulic cylinder, 2 is a rod tip portion of the hydraulic cylinder, 3 and 4 are connecting pipes, and 5 is a hydraulic jack. The same reference numerals are attached to those corresponding to the conventional example.

In the height adjusting device according to the present invention, the lower frame 14a of the lifting device 13 is provided with a retractable hydraulic jack 5.

As shown in FIGS. 2 (a) and 2 (b) as an example, the hydraulic jack 5 has a hydraulic cylinder 1 and a tip portion 2 provided via a rod, and a lower surface of the tip portion 2 is provided. A buffer material 23 made of an elastic material such as rubber is fixed.

Such hydraulic jacks 5 are attached to the lower frame 14a of the lifting device 13 at least at four locations (see FIG. 1). The hydraulic jacks 5 operate independently of each other and are operated by a drive unit 14s of the lifting device 13 by remote control.

Although the hydraulic jack is used as an example of the height adjusting device of the present invention, the invention is not limited to this, and it is also possible to adopt an expanding / contracting means such as a screw type jack, a rack drive jack or a hydraulic jack. it can. Further, it is possible to provide a small motor so that each can independently perform the expansion and contraction operation.

In this way, the height adjusting device is provided in the elevating device 13, and the usage method thereof will be described. As described in the conventional example, the elevating device 13 is mounted on the upper surface 30a of the concrete 30 that was cast last time. Then, the pair of expansion / contraction mechanism portions 14 and 14 are opened, and the hydraulic jack 14b is operated to open the lifting device 13 (steps of FIGS. 7A, 7B, and 7C).

After the elevating device 13 is erected and set on the concrete upper surface 30a with the support rods 26 and 27, next, the inclination of the elevating device 13 is checked. If the lifting device 13 is tilted in a certain direction due to the unevenness of the concrete upper surface 30a, the four hydraulic jacks 5 of the height adjusting device are appropriately operated by the drive unit 14s in order to correct this.

When the tilt of the elevating device 13 is corrected in this way and the horizontal state is maintained, the form support 11 is raised by a predetermined amount as shown in FIGS. 8A and 8B, as described in the conventional example. Let

Although the height adjusting device in the lifting device 13 of the present invention is as described above, the cushioning material 23 fixed to the lower surface of the rod tip portion 2 may be omitted in some cases.

[0040]

[Effect of the device]

 As described above, the elevating device of the self-elevating formwork device of the present invention supports the formwork for concrete pouring, and includes the sea bolt that is detachably engaged with the anchor bolt embedded in the concrete side wall. And a lifting device for a self-elevating formwork device, which is formed by a vertical support device and a lifting device that is vertically expandable and contractible by a reaction force on the upper surface of the concrete to raise the mold support. Since the lower frame of the lifting device is equipped with an independently adjustable height adjustment device, it is possible to easily correct the tilt of the lifting device caused by the unevenness of the top surface of the cast concrete, and thus the formwork support. As the work can be lifted straight, the work of raising the formwork becomes efficient.

[Brief description of drawings]

FIG. 1 is a perspective view of an elevating device in a self-propelled formwork device according to the present invention.

FIG. 2 is a partial front view of the height adjusting device of the lifting device (a),
It is a side view (b) as well as.

FIG. 3 is a side view of a self-propelled formwork apparatus according to a conventional example.

FIG. 4 is a front view of a self-raising mold device according to a conventional example, excluding a lifting device.

FIG. 5 is a perspective view showing a usage state of the self-propelled formwork apparatus.

FIG. 6 is an explanatory diagram showing a usage state of the self-propelled formwork apparatus in the same manner.

FIG. 7 is an explanatory view showing a usage state of the self-propelled formwork apparatus in the same manner.

FIG. 8 is an explanatory diagram of a use state similarly.

[Explanation of symbols]

1 hydraulic cylinder, 2 rod end of hydraulic cylinder, 3, 4 connecting pipe, 5 hydraulic jack.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Creator Mitsuo Kanazawa 7-7-9 Nishigotanda, Shinagawa-ku, Tokyo Kanazawa Manufacturing Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A formwork support body that supports a formwork for pouring concrete and is provided with a seabolt that is detachably engaged with an anchor bolt embedded in a side wall of concrete, and a reaction force on the upper surface of concrete. In an elevating device for a self-elevating formwork device, which is formed by an elevating device that is vertically expandable and contractible to elevate the mold support, a lower frame of the elevating device is provided with independently extendable and retractable heights. A lifting device for a self-propelled formwork device, characterized in that a height adjustment device is provided.