JPH0751840B2 - Lift up device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a lift-up device for preliminarily assembling a steel frame or the like constituting a roof of a structure on the ground and moving the steel frame to a predetermined height position.

<< Prior Art >> An example of a conventional lift-up method is generally as shown in FIG.

A lower pedestal 2 is provided between the tops of vertically-supported columns 1-1, a hydraulic jack 3 is placed on the pedestal 1-1, and the upper pedestal 4 is carried by the jack 3.

Then, the structure 6 to be lifted is suspended at the lower end of the rod 5 which vertically penetrates the upper mount 4 and the lower mount 2,
An upper nut 7 that locks to the upper end surface of the upper pedestal 4 and a lower nut 8 that abuts on the lower pedestal 2 are respectively screwed into the upper portions of the.

When the ram of the jack 3 is extended, the rod 5 is integrally lifted as the upper pedestal 4 is lifted, so that the lifted structure 6 is lifted by the amount of extension of the ram. In order to hold this state, the lower nut 8 is rotated to lower it until it hits the upper end of the lower pedestal 2, and then the ram of the jack 3 is lowered, so that the lifted structure 6 can be temporarily hung by the nut 8. Next, the upper nut 7 is rotated down to the upper end surface of the upper mount 4 to prepare for the rising step of extending the ram of the jack 3 again.

<< Problem to Solve the Problem >> However, in the above-described conventional example, the upper nut 7 and the lower nut 8 must be screwed to a predetermined position in advance in preparation for expansion and contraction of the jack 3. Moreover, the rod 5 for suspending the lifted structure 6 was required.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a lift-up device that does not require the operation of the nut or the rod, and that can be configured and operated simply.

<Means for Solving the Problems> In order to achieve the above object, a lift-up device of the present invention is erected in a lift-up direction, a slide rail is formed along the lift-up direction, and the lift-up is performed. Column and a pair of upper and lower sliders slidably fitted in the slide rail of the column in the lift-up direction, and these upper sliders. And the lower slider, which are respectively provided in the locking holes so as to be freely inserted into and removed from the locking holes, and insertion and extraction pins that are inserted to engage and support the sliders with the columns, and the insertion and extraction pins provided in the sliders, and the insertion and extraction pins are inserted into the locking holes. Biasing means for pressing and pushing for insertion, and the insertion tip of the insertion / extraction pin are formed obliquely in order from the upper side to the lower side in the insertion direction, When the insertion / extraction pin is inserted into the locking hole, it abuts against the upper edge of the locking hole from the insertion direction, and the sliding pin slides in the lift-up direction against the biasing means. It is provided between the upper and lower sliders and an inclined surface that slides on the upper edge of the hole and is pushed in the extraction direction to allow the insertion / extraction pin to be extracted from the locking hole. Is extended on the lower slider, which is supported by being engaged with, and slides the slider in the lift-up direction with respect to the supporting column, while under the upper slider, which is supported by being engaged with the supporting column by the insertion / removal pin. A jack that is contracted to slide the lower slider in the lift-up direction with respect to the column, and a lift-up object is attached to at least one of the jack and the slider.

<Operation> To describe the operation of the present invention, in the initial state,
The upper slider and the lower slider are fitted to the slide rails of the column, and the insertion / extraction pins of these sliders are pressed and biased by the biasing means to be inserted into the locking holes of the column. As a result, both sliders are engaged with and supported by the column. At this time, the inclined surface formed at the insertion tip of the insertion / extraction pin is in contact with the upper edge of the locking hole in the insertion direction.

In this state, the jack is extended. Due to the extension operation of the jack, a force in the lift-up direction that pushes up the upper slider is applied between the upper slider and the lower slider. In the slider described above, the lift-up force that accompanies the extension of the jack acts on the insertion / extraction pin, and by extension, the inclined surface of the insertion tip of the insertion / extraction pin.

Since the inclined surface is formed obliquely from the upper side to the lower side in the insertion direction of the insertion / extraction pin, when the lift-up force acts on the inclined surface, the inclined surface and the upper edge of the locking hole are separated. Force is generated in the direction that pushes the slanting surface that slides up from the locking hole, and the slanting surface has the effect of pulling out the insertion / extraction pin from the locking hole against the biasing means. Demonstrate. That is, when the sliding operation in the lift-up direction of the upper slider by the extension operation of the jack is started,
The lift-up force of the jack causes the insertion / extraction pin to be pulled out from the locking hole, which allows the upper slider to slide on the column via the slide rail.
It will be lifted up.

This inclined surface generates a force for pulling out the insertion / extraction pin from the locking hole only by a force in the lift-up direction, and therefore, when the jack is extended, the lower slider is lifted. Since a force is applied in the direction opposite to the up direction, the insertion / extraction pin of the lower slider remains inserted in the locking hole, and eventually the jack takes a reaction force to the lower slider to lift up the upper slider. Become.

The upper slider lifted up in this way then reaches the position where the insertion / extraction pin matches the locking hole,
The insertion / extraction pin is inserted into the locking hole by the biasing means, and is engaged with and supported by the column.

Next, when the jack is contracted, the contraction of the jack causes a gap between the upper slider and the lower slider.
Contrary to the above, a force in the lift-up direction for pulling the lower slider is applied to the lower slider.

At this time, as described above, the inclined surface functions to pull out the insertion / extraction pin from the locking hole by the force in the lift-up direction, so that the force in the direction opposite to the lift-up direction acts on the upper slider. During the contraction operation of the jack, the insertion / removal pin of the upper slider remains inserted in the locking hole, and the jack eventually takes a reaction force to the upper slider to lift up the lower slider.

In the lower slider as well, similarly to the above, the lift-up force due to contraction of the jack acts on the inclined surface of the insertion tip of the insertion / extraction pin, and the insertion / extraction pin is extracted from the locking hole. That is, when the sliding movement of the lower slider in the lift-up direction starts due to the contraction operation of the jack, the lift-up force of the jack causes the insertion / extraction pin to be pulled out from the locking hole. It will be slidable and lifted up.

The lower slider lifted up in this way also reaches the position where the insertion / extraction pin matches the locking hole,
The insertion / extraction pin is inserted into the locking hole by the biasing means, and is engaged with and supported by the column.

In this way, one expansion / contraction operation of the jack lifts both the upper slider and the lower slider by the stroke of the jack. By repeating the expansion / contraction operation of the jack, the sliders are sequentially lifted up. It can be lifted up by attaching a lift-up object to these jacks or the upper slider or the lower slider.

According to such a configuration, the nut refilling work when changing the position of the upper pedestal accompanying the vertical movement of the jack, which was conventionally required for the lift-up operation of the object to be lifted, is performed by inserting / removing the pin into / from the locking hole. The automatic insertion / removal operation is performed, and this insertion / removal operation is achieved all at once in association with the expansion / contraction operation of the biasing means and the jack, and it is possible to improve the workability of lift-up work and increase the efficiency. .

In addition, the rod that was necessary to suspend the lift-up target object becomes unnecessary by directly attaching the lift-up target object to the jack or slider that is sequentially lifted up with respect to the support post, and At the time of lifting, it is possible to simplify the connection between the device and the object to be lifted up, and it is possible to improve workability in this respect as well.

«Examples» Hereinafter, preferred examples of the present invention will be described in detail with reference to the drawings.

1 to 4 all relate to an embodiment of the present invention. The present embodiment is basically a pillar that is erected in the lift-up direction, has slide rails 10a formed along the lift-up direction, and has a plurality of locking holes 9 formed at equal intervals in the lift-up direction. 10 and the slide rail 10a of the pillar 10,
A pair of upper and lower sliders 12a and 12b, which are slidably fitted in the lift-up direction, and the upper and lower sliders 12a and 12b, respectively, are provided so that they can be inserted into and removed from the locking holes 9, and inserted. Levers 13a, 1b for engaging and supporting these sliders 12a, 12b on the column 10.
3b and these sliders 12a, 12b are provided with insertion / removal pins 13
A coil spring 20 as a biasing means for pressing and pushing a and 13b into the locking hole 9 and an insertion tip portion of the insertion / extraction pins 13a and 13b obliquely in order from the top to the bottom in the insertion direction. The insertion / removal pins 13a, 13b are inserted into the locking holes 9 to contact the upper edge of the locking holes 9 from the insertion direction, and when the sliders 12a, 12b slide in the lift-up direction, the coil spring 2
The slanted surface 18 that slides against the upper edge of the locking hole 9 against 0 and is pressed in the pulling-out direction to pull out the insertion / removal pins 13a and 13b from the locking hole 9, the upper slider 12a, and the lower slider. 12b and is extended on the lower slider 12b that is supported by the support pin 10 by the insertion / removal pin 13b so that the upper slider 12a slides in the lift-up direction with respect to the support 10, and the other insertion / removal pin Upper slider 12a engaged with and supported by the column 10 by 13a
And a jack 15 that is contracted below to slide the lower slider 12b in the lift-up direction with respect to the column 10.
A structure 14 which is a lift-up target is attached to at least one of the jack 15 and the sliders 12a and 12b.

FIG. 1 is a side view showing before and after construction by a lift-up device according to the present invention, which mainly comprises locking holes 9 opened at equal intervals in an upper flange 10a of an H-shaped steel. A pair of upper and lower sliders 12 that are slidably fitted to the pillars 10 and the upper flanges 10a of the pillars 10 as slide rails and that have through holes 11 that match the locking holes 9.
a, 12b, and a claw-shaped insertion / extraction pin 13 that is passed through the through hole 11,
At least one of the slider 12 and the structure 14 is directly or indirectly arranged with a jack 15.

The structure 14 is the roof of the building. The jack 15 comprises a hydraulic cylinder and a cylinder rod or ram.

As will be described later, while applying a rising reaction force to the insertion / extraction pin 13,
Since the jack 15 repeats the expansion and contraction movement, and thereby rises in the standing direction of the column 10, the structure 14 is fixed to the jack 15 side, and the structure 14 together with the jack 15 also rises while being guided by the column 10. It is a thing.

The upper flange 10a of the column 10 is provided with circular locking holes 9 formed in parallel in two rows at equal intervals, but this is not limited to a circular shape and may be a rectangular opening. It is desirable that the shape of the insertion / removal pin 13 has a cross section that matches the shape of the locking hole 9. This is because if the mechanical backlash is large, there is a risk that the insertion / extraction pin 13 will come off the locking hole 9.

FIG. 2 shows details of the sliders 12a and 12b and the insertion / extraction pin 13.

Since the upper slider 12a and the lower slider 12b have the same structure, the upper slider 12a will be described as an example. The slider 12a is made of a steel material having a C-shaped cross section that grips both sides of the upper flange 10a of the column 10. Further, a fastening plate 16 for connecting to the jack 15 is integrally provided on the upper end of the slider 12a (FIG. 8B). Further, the slider 12 has through holes 11 arranged in parallel with each other at the positions of the locking holes 9 in two rows.
It is provided individually. Insertion / extraction pin 13 loosely inserted into each through hole 11
The top portion of the is integrally fixed by welding or the like on both sides of the steel plate 17 (a in the figure).

Further, the insertion / removal pin 13 is attached to the slider 17 together with the steel plate 17.
12a, and the slider 12a on the upper flange 10a of the column 10.
An inclined surface 18 is formed which reaches the upper edge of the locking hole 9 of the support column 10 when fitted to the. The inclined surface 18 has a shape in which the tip of the insertion / removal pin 13 is rounded up obliquely upward, and is uniformly upward when the steel plate 17 is attached to the slider 12a.
Since the inclined surface 18 is attached to the insertion / extraction pin 13 having a circular cross section,
The tip is tapered, so that the pillar 10 can be smoothly inserted into the locking hole 9.

When moving the sliders 12a and 12b on the column 10, insert / remove the pin 1
Although the tip of 3 enters the locking hole 9, it has a structure as shown in FIG. 3 in order to automate and ensure its insertion operation.

That is, an L-shaped support bracket 19 is integrally provided so as to extend from the lower end of the slider 12a to the lower surface of the fastening plate 16, and between the support bracket 19 and the steel plate 17 to which the insertion / extraction pin 13 is attached. The coil spring 20 is contracted. As a result, the insertion / extraction pin 13 that is passed through the through hole 11 of the slider 12a and has its tip facing the locking hole 9 is constantly urged by the coil spring 20 toward the locking hole 9.

Then, as shown in FIG. 4, the sliders 12a, 12b having the insertion / extraction pins 13a, b mounted thereon are fitted on the support column 10, and the insertion / extraction pins 13a, b are inserted into the locking holes 9 to fix the fixing plate of the slider 12a. Structure at 16
Carry 14 The insertion / extraction pins 13a and 13b engage with the locking holes 9 of the support column 10 and bear the load of the structure 14. Then, the ram of the jack 15 is fixed to the back surface of the fixing plate 16a of the upper slider 12a, and the bottom surface of the cylinder portion is fixed to the surface of the fixing plate 16b of the lower slider 12b. The inclined surface 18 of each of the insertion / removal pins 13a and 13b is arranged upward. Note that the load of the structure 14 is determined by at least one of the sliders 12a and 12b.
It can be supported on the 0 side.

Further, the steps of lifting up the structure 14 using the above apparatus are shown in detail in FIGS. 4 (a) to 4 (c).

In the initial state, the upper slider 12a and the lower slider 12b are fitted to the upper flange 10a of the column 10, and the insertion / extraction pins 13 of these sliders 12a and 12b are pressed by the coil springs 20 to lock the columns of the column 10. Insert it in 9.
As a result, the sliders 12a and 12b are engaged with and supported by the column 10. At this time, the inclined surface 18 formed at the insertion tip of the insertion / removal pin 13 is in contact with the upper edge of the locking hole 9 in the insertion direction.

In this state, the jack 15 is extended. This jack
By the extension operation of 15, the force in the lift-up direction that pushes up the upper slider 12a acts between the upper slider 12a and the lower slider 12b. In the upper slider 12a, the lift-up force that accompanies the extension of the jack 15 acts on the insertion / extraction pin 13, and by extension, the inclined surface 18 of the insertion tip of the insertion / extraction pin 13.

Since the inclined surface 18 is formed obliquely from the upper side toward the lower side in the insertion direction of the insertion / extraction pin 13, when the lift-up force acts on the inclined surface 18, the upper surface of the inclined surface 18 and the locking hole 9 are prevented. A force is generated between the edge and the slidable surface 18 that slides up and comes out from the locking hole 9, so that the slanted surface 18 resists the coil spring 20 and locks the insertion / extraction pin 13. 9
Demonstrate the action of pulling out from. That is, jack 15
When the sliding operation of the upper slider 12a in the lift-up direction is started by the extension operation of, the insertion / extraction pin 13 is pulled out from the locking hole 9 by the lift-up force of the jack 15, whereby the upper slider 12a Upper flange 10a
It becomes slidable with respect to the support column 10 through and is lifted up.

The inclined surface 18 generates a force for pulling out the insertion / removal pin 13 from the locking hole 9 only by a force in the lift-up direction. Therefore, when the jack 15 is extended as described above, Since a force in the direction opposite to the lift-up direction acts on the slider 12b, the lower slider 12b
The insertion / removal pin 13 remains inserted in the locking hole 9, and the jack 15 eventually lifts the upper slider 12a by applying a reaction force to the lower slider 12b.

The upper slider 12a lifted up in this way
After that, when the insertion / extraction pin 13 reaches a position where it coincides with the locking hole 9, the insertion / extraction pin 13 is inserted into the locking hole 9 by the coil spring 20 and is engaged and supported by the column 10.

Then, when the jack 15 is contracted, the jack 15
In contrast to the above, a force in the lift-up direction for pulling up the lower slider 12b acts between the upper slider 12a and the lower slider 12b due to the contraction operation.

At this time, as described above, the inclined surface 18 functions so as to pull out the insertion / extraction pin 13 from the locking hole 9 by the force in the lift-up direction, so that the upper slider 12a moves in the direction opposite to the lift-up direction. When the jack 15 is contracted by the force of, the insertion / extraction pin 13 of the upper slider 12a is inserted into the locking hole 9, and the jack 15 ends up in the upper slider 12a.
The lower slider 12b is lifted up by applying a reaction force to a.

In the lower slider 12b as well, similarly to the above, the lift-up force accompanying the contraction of the jack 15 acts on the inclined surface 18 of the insertion tip of the insertion / extraction pin 13, and the insertion / extraction pin 13 is extracted from the locking hole 9. That is, when the lower slider 12b starts to slide in the lift-up direction due to the contraction of the jack 15, the lift-up force of the jack 15 causes the insertion / extraction pin 13 to be extracted from the locking hole 9. The lower slider 12b becomes slidable with respect to the column 10 and is lifted up.

The lower slider 12b thus lifted up
Also, after that, when the insertion / extraction pin 13 reaches the position where it coincides with the locking hole 9, the insertion / extraction pin 13 is inserted into the locking hole 9 by the coil spring 20 and is engaged and supported by the column 10.

In this way, one expansion / contraction operation of the jack 15 causes both the upper slider 12a and the lower slider 12b to be lifted up by the stroke of the jack 15, and the jack 15
The sliders 12a and 12b can be sequentially lifted up by repeating the expansion and contraction operation of the jack 15 or the upper slider 12a or the lower slider 12b.
This can be lifted up by attaching the structure 14 to the.

In this embodiment, since the structure body 14 is lifted by the reaction force of the insertion / removal pins 13a and 13b with respect to the locking hole 9 provided in the support column 10, the structure body 14 is raised as compared with the conventional lift-up method. There is no need to temporarily fix the rod that suspends 14 and the raised position of the rod.

The insertion / removal pins 13a, 13b are supported by the urging force of the coil spring 20 on the column 10
Since it is automatically fitted into the locking hole 9 of the above structure, the structure 14 can be raised only by repeating the expansion and contraction of the jack 15, and there is an effect that the working efficiency becomes extremely high.

<< Effect >> In summary, according to the present invention, the nut refilling work for changing the position of the upper cradle accompanying the vertical movement of the jack, which was conventionally required for the lift-up operation of the object to be lifted, is performed by the locking hole. It is replaced by the automatic insertion / removal operation of the insertion / removal pin, and this insertion / removal operation is achieved all at once in association with the expansion / contraction operation of the biasing means and the jack, thereby improving the workability of lift-up and improving the efficiency. be able to.

In addition, the rod that was necessary to suspend the lift-up target object becomes unnecessary by directly attaching the lift-up target object to the jack or slider that is sequentially lifted up with respect to the support post, and At the time of lifting, it is possible to simplify the connection between the device and the object to be lifted up, and it is possible to improve workability in this respect as well.

[Brief description of drawings]

1 to 4 are all related to the embodiment of the present invention.
The figure shows a side view of the construction state by the lift-up device, FIGS. 2 (a) and 2 (b) are perspective views showing a part of the constituent members, and FIG. 3 shows the insertion / extraction pin mounted on the slider to the locking hole at all times. The structure for urging the pressing is shown, (a) is a plan view, (b) is a cross-sectional view, and (a) to (c) in FIG. 4 are vertical cross sections sequentially showing the state of lift-up. FIG. 5 is an explanatory view showing a conventional construction example. 1 ... Support post, 2 ... Lower mount 3 ... Hydraulic jack, 4 ... Upper mount 5 ... Rod, 6 ... Ascended structure 7 ... Upper nut, 8 ... Lower nut 9 ... Locking hole , 10 ... Strut 11 ... Through hole, 12a 12b ... Lower slider, 13a, 13b ... Insertion / extraction pin 14 ... Structure, 15 ... Jack 16 ... Fixing plate, 17 ... Steel plate 18 ... Inclined surface, 19 ... Support bracket 20 ... Coil spring

Claims (1)

[Claims] 1. A lift rail is provided upright in the lift-up direction, a slide rail is formed along the lift-up direction, and
A column having a large number of locking holes formed at equal intervals in the lift-up direction, and a pair of upper and lower sliders that are slidably fitted in the slide rail of the column in the lift-up direction, and a lower slider. The upper slider and the lower slider are respectively provided in such a manner that they can be inserted into and removed from the locking holes, and the insertion and extraction pins that are inserted to engage and support the sliders with the support columns; A biasing means for pressing and pushing to insert into the stop hole, and an insertion tip of the insertion / extraction pin are formed obliquely in order from the upper side to the lower side in the insertion direction, and the insertion / extraction pin is inserted into the locking hole. When it is inserted, it comes into contact with the upper edge of the locking hole from the insertion direction, and is pulled out while slidingly contacting the upper edge of the locking hole against the biasing means when the slider slides in the lift-up direction. Out On the lower slider, which is interposed between the upper and lower sliders, which is pressed in the direction to pull out the insertion / extraction pin from the locking hole, and which is engaged with and supported by the column by the insertion / extraction pin. The upper slider is extended to slide in the lift-up direction with respect to the column, while the upper slider is contracted below the upper slider engaged with and supported by the column by the insertion / extraction pin to move the lower slider to the column. A lift-up device comprising a jack that slides in the lift-up direction, and a lift-up target is attached to at least one of the jack and the slider.