JP3238000U - Auxiliary device for jack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary device for a jack. SOLUTION: The auxiliary device for a jack of the present invention includes a first frame unit in which a plurality of columnar male screw portions extending in the stroke direction of the jack are provided at each of four corners of a top surface portion for transmitting displacement due to jacking up to a heavy object. A base plate in which the lower ends of each of a plurality of columns provided with a hollow space through which a columnar male screw portion is inserted are fixed, and a fixing plate in which an upper end of each of the plurality of columns is fixed and an opening through which the columnar male screw portion is inserted is formed. It is provided with a two-frame unit and a plurality of nuts that are screwed into each of a plurality of columnar male screw portions and are provided between the opening of the fixing plate and the top surface portion. With the displacement of the jack placed in the second frame unit due to jacking up transmitted to the heavy object, each nut is in contact with the fixing plate for each columnar male thread part exposed from the column through the opening. It is moved to support the load of heavy objects in the jacked up state. [Selection diagram] FIG. 4

Description

The present invention relates to an auxiliary device for a jack that transmits the displacement due to jacking up to a heavy object and supports the load of the heavy object in the jacked up state.

Jack-up work is one of the tasks of handling various heavy objects. Jack devices such as hydraulic jacks and screw jacks are used, but since the jack stroke itself is fixed, the jack stroke is insufficient for the distance to the target lifting position (the maximum length of the jack stroke is long). , Shorter than the distance to the target lifting position), perform load receiving work and jack up heavy objects to the target lifting position.

FIG. 8 is a diagram showing an example of a conventional jack-up work involving a load receiving work using a temporary receiving material. As shown in FIG. 8, the jack is installed at the jack-up point (jack-up designated position) of a heavy object and jacked up (circled number 1). Insert the temporary receiving material under the heavy object in the jacked up state and install it (circled number 2). At this time, in order to make it easier to insert the temporary receiving material, jack up higher than the height of the temporary receiving material so that a gap (space) is formed between the bottom surface of the heavy object and the temporary receiving material to be inserted. do. After that, jack down and deposit the heavy object (load of the heavy object) in the temporary receiving material (circled number 3).

Next, the jack is raised (a raising material is laid on the bottom surface of the jack), and after raising, the jack is raised again (circled numbers 4 and 5). After that, repeat until the target lifting position (circled number 6).

Patent No. 2528437

The conventional jack-up work involving load receiving work has a problem of lowering work efficiency in the first place, but further has the following problems. When the weight to be supported becomes large or a large amount of raising is required, the size of the temporary receiving material becomes large and the weight also becomes large. A large and heavy temporary receiving material is difficult to handle, increases the work load, and requires sufficient consideration for safety during transportation and safety when placing it on the floor below a heavy object.

Further, when the temporary receiving material is inserted under the heavy object in the jacked-up state, if the gap between the temporary receiving material and the heavy object is small, the insertion work is difficult and the work load becomes large. In particular, if the temporary receiving material is large and heavy as described above, the work load becomes even greater.

Further, as shown by the circled number 3 in FIG. 8, after installing the temporary receiving material under the heavy object in the jacked up state, the temporary receiving material is jacked down and the heavy object (load of the heavy object) is deposited in the temporary receiving material. At this time, the load applied to the jack changes, which may affect heavy objects in some way. For example, there is a case where each jack is installed at each of a plurality of separated places to jack up a heavy object. In this case, if there is a difference in the jack-down amount of each jack when jacking down and depositing a heavy object (load of a heavy object) in the temporary receiving material, the heavy object may tilt or the load applied to each jack may be excessive. It is conceivable that an unbalance will occur and a twisting force will be applied to the heavy object itself, which will adversely affect the heavy object itself. Therefore, it is necessary to consider both the influence on heavy objects and the safety of work, which causes an increase in work load and a decrease in work efficiency.

Therefore, an object of the present invention is to provide a jack assisting device that transmits the displacement due to jacking up to a heavy object and supports the load of the heavy object in the jacked up state.

(1) The present invention includes a first frame unit having a top surface portion that transmits displacement due to jacking up to a heavy object, and a plurality of columnar male screw portions that are fixed to each of the four corners of the top surface portion and extend in the stroke direction of the jack. , Multiple columns arranged at positions corresponding to each of the plurality of columnar male threaded portions and provided with a hollow space inside for inserting the columnar male threaded portions, a base plate to which the lower ends of each of the plurality of columns are fixed, and a plurality of columns. A second frame unit having a fixed plate in which the upper end of each is fixed and an opening through which a hollow space is formed corresponding to each column is formed, and a plurality of columnar male threaded portions are screwed into each. It is provided with a plurality of nuts provided between the opening of the fixing plate and the top surface portion. Then, each column of the first frame unit exposed from the column through the opening in a state where the displacement due to the jack-up of the jack arranged in the area surrounded by the plurality of columns of the second frame unit is transmitted to the heavy object. Each nut is moved to a position where it abuts on the fixing plate with respect to the male threaded portion to support the load of a heavy object in a jacked-up state.

(2) In the above (1), the fixing plate can be composed of one U-shaped plate member to which a plurality of columns provided at the four corners of the base plate are connected and fixed, and is a second frame unit. The fixing plate can be provided so that the U-shaped opening is located in the direction in which the jack is taken in and out with respect to the area surrounded by the plurality of columns.

(3) In the above (1) or (2), the fixing plate can be composed of one U-shaped plate member to which a plurality of columns provided at the four corners of the base plate are connected and fixed. At this time, the second frame unit can be configured so that reinforcing ribs for connecting the columns are provided between the columns other than the columns where the U-shaped opening of the fixing plate is located.

(4) In the above (1), the base plate of the second frame unit can be configured to have a communication hole communicating with the hollow space at a position corresponding to each of the plurality of columns.

According to the present invention, when a jack is arranged in an area surrounded by a plurality of columns of the second frame unit and jacking up is performed, the displacement due to the jacking up is transmitted to a heavy object via the first frame unit. Then, with the displacement due to jacking up transmitted to the heavy object, each nut is lowered with respect to each columnar male thread portion of the first frame unit exposed from the column through the opening, and the nut is moved to a position where it abuts on the fixing plate. Let me. This makes it possible to support the load of a heavy object in a jacked-up state.

Therefore, it is not necessary to perform the load receiving work using the conventional temporary receiving material, and the work efficiency and safety of jacking up are greatly improved. Further, it is possible to suppress the influence on a heavy object when the load is transferred from the jack to the auxiliary device for the jack of the present invention, and it is possible to improve work efficiency and safety.

It is an exploded perspective view of the auxiliary device for a jack of Example 1 which concerns on this invention. It is a figure which shows an example which the jack device was set to the auxiliary device for the jack of Example 1 which concerns on this invention. It is a front view of the state which the jack device is set to the auxiliary device for the jack of Example 1 which concerns on this invention. To explain the first function of transmitting the displacement due to jacking up to a heavy object and the second function of supporting the load of a heavy object in the jacked up state of the auxiliary device for jacking according to the first embodiment of the present invention. It is a figure. It is explanatory drawing of the jack-up work to which the auxiliary device for a jack of Example 1 which concerns on this invention is applied. It is explanatory drawing of the jack-up work to which the auxiliary device for a jack of Example 1 which concerns on this invention is applied. It is a figure which shows the modification of the auxiliary device for a jack of Example 1 which concerns on this invention. It is a figure which shows an example of the conventional jack-up work which involves the load-bearing work using a temporary receiving material.

Hereinafter, examples of the present invention will be described in detail with reference to the accompanying drawings.

(Example 1)
1 to 7 are views showing Example 1 according to the present invention. In the jack auxiliary device 1 of the present embodiment, a jack device A such as a hydraulic jack or a screw jack is arranged inside, and the displacement due to jacking up is transmitted to a heavy object, and the load of the heavy object in the jacked up state is transferred. It is a load receiving device for supporting jacks.

FIG. 1 is an exploded perspective view of the jack auxiliary device 1. FIG. 2 is a perspective view of the jack auxiliary device 1 in which the jack device A is set, and FIG. 3 is a front view of the jack auxiliary device 1 in which the jack device A is set.

As shown in FIG. 1, the jack auxiliary device 1 includes a first frame unit 10, a second frame unit 20, and a nut 30.

The first frame unit 10 has a top surface portion 11 that transmits displacement due to jacking up to a heavy object, and a plurality of columnar male screw portions 12 (12A, 12B, 12C, 12D) extending in the stroke direction of the jack device A. The top surface portion 11 is a square plate-shaped member, and columnar male screw portions 12 are fixed to each of the four corners of the top surface portion 11. The columnar male threaded portion 12 has a male threaded groove formed on the peripheral surface thereof, and the nut 30 is screwed into the columnar male threaded portion 12.

In the second frame unit 20, columns 21 (21A, 21B, 21C, 21D) in which a hollow space 21a through which the columnar male threaded portion 12 is inserted are formed are arranged at positions corresponding to each of the plurality of columnar male threaded portions 12. ing. Each of the four columns 21 is a hollow cylindrical column that stands upright above the base plate 22. Each of the plurality of columns 21 has a lower end fixed to the base plate 22 and an upper end fixed to the fixed plate 23, and is sandwiched between the base plate 22 and the fixed plate 23. The area surrounded by the plurality of columns 21 is a space for accommodating and arranging the jack device A. The base plate 22 is formed with a communication hole (drainage port or exhaust port) 22a that communicates with the hollow space 21a at a position corresponding to each of the plurality of columns 21.

The fixing plate 23 is a plate member wider than the diameter of the column 21, and an opening 24 for inserting the hollow space 21a of the column 21 is formed at a position where the upper ends of each of the plurality of columns 21 are fixed. The opening 24 is a hole having a size through which the columnar male screw portion 12 can be inserted.

Further, the fixing plate 23 is formed in a U shape along the four columns 21 (from the column 21A to the column 21B, the column 21C and the column 21D), and the upper part of the base plate 22 opens toward the top surface portion 11. .. The fixing plate 23 functions as a reinforcing member for connecting and fixing between the columns 21, and also functions as a receiving surface that comes into contact with the seat surface of the nut 30 and receives a load of a heavy object via the nut 30.

The fixing plate 23 is arranged so that a U-shaped opening is located in the direction in which the jack device A moves in and out of the area surrounded by the plurality of columns 21. That is, a U-shaped opening area of the fixing plate 23 is located between the support columns 21A and the support column 21D, and the fixing plate 23 is used when the jack device A is taken in and out of the area surrounded by the plurality of support columns 21. You can set it smoothly without getting in the way.

Reinforcing ribs 25 for connecting the columns 21 are provided between the columns 21 of the second frame unit 20. At this time, the reinforcing rib 25 is not provided between the columns 21A and 21D where the U-shaped opening region of the fixing plate 23 is located, and between the other columns 21 (between the columns 21A and 21B, the columns 21B). , 21C, and between the columns 21C and 21D), reinforcing ribs 25 are provided. The reinforcing rib 25 is a plate-shaped member, and the end faces extending in the longitudinal direction are in contact with and fixed to the fixing plate 23, and the end faces extending in the width direction are in contact with and fixed to each of the separated columns 21. .. By providing the reinforcing rib 25, the strength of the four columns 21 against the horizontal stress can be improved.

The nut 30 is provided between the opening 24 of the fixing plate 23 and the top surface portion 11 by screwing the columnar male screw portion 12 of the first frame unit. The nut 30 is formed with a female thread groove to be screwed into the columnar male threaded portion 12, and when the seat surface comes into contact with the fixing plate 23, a heavy object is loaded at the screwed position of the nut 30 in the columnar male threaded portion 12. be able to. That is, the load applied to the first frame unit 10 from the heavy object is transmitted to the second frame unit 20 via the nut 30, and the load of the heavy object is supported by the entire jack auxiliary device 1.

FIG. 4 is for explaining a first function of transmitting the displacement due to jacking up to a heavy object and a second function of supporting the load of the heavy object in the jacked up state of the jack auxiliary device 1 of the present embodiment. It is a figure of.

In the jack auxiliary device 1, the upper portion of the base plate 22 is opened toward the top surface portion 11 in order to cause the top surface portion 11 of the first frame unit 10 to be displaced by the jack up by the jack device A, and the top surface portion 11 is opened. The displacement due to jacking up is transmitted to the heavy object through the jack-up (first function). Then, in a state where the heavy object is jacked up, each nut 30 screwed into each columnar male screw portion 12 of the first frame unit 10 exposed from the support column 21 through the opening 24 is in contact with the fixing plate 23. By moving it to, it is possible to support the load of a heavy object in a jacked up state (second function).

FIG. 5 is an explanatory diagram of a jack-up operation to which the jack auxiliary device 1 of the present embodiment is applied. The jack auxiliary device 1 is used when jacking up a heavy object to a position higher than the stroke length peculiar to the jack device A, and requires load receiving work using the conventional temporary receiving material shown in FIG. Achieve no jack-up work.

First, the jack auxiliary device 1 is installed at the jack-up point (jack-up designated position) of a heavy object. The jack device A is placed and set on the installed jack auxiliary device 1. At this time, by carrying the jack device A into the second frame unit 20 from the direction in which the U-shaped opening region of the fixing plate 23 is located, smooth setting work can be performed.

Further, in the jack device A, the displacement portion of the jack device A (for example, a piston (ram) that strokes in the vertical direction or a pedestal provided at the tip of the piston) is located substantially in the center of the top surface portion 11. It is set in the auxiliary device 1 for the jack.

Next, jacking up is performed by the jack device A (circled number 1). Along with the jacking up, the columnar male screw portion 12 of the first frame unit 10 moves upward and is exposed from the second frame unit 20. Then, the nut 30 is lowered with the jack up to the maximum value of the stroke length of the jack device A. By lowering the nut 30 and bringing it into contact with the fixing plate 23, the jack auxiliary device 1 prepares to support the load of a heavy object. Then, the jack device A is lowered, and the load of a heavy object is supported by the jack auxiliary device 1 (circled number 2).

Further, in order to jack up a heavy object to a target height, the jack device A is raised. A raising member is laid under the jack device A, and the raised jack device A is driven by the jack auxiliary device 1 to further jack up (circled number 3). With the jack up to the maximum value of the stroke length of the jack device A, the nut 30 is lowered and brought into contact with the fixing plate 23, and the load of a heavy object is supported by the jack auxiliary device 1. After that, the jack device A is jacked down (circled number 4). By repeating this, it is possible to jack up a heavy object to the target height without performing the load receiving work using the temporary receiving material.

FIG. 6 is an example in which the raising member is installed not under the jack device A but between the displacement portion of the jack device A and the top surface portion 11 in the jack-up work exemplified in FIG. Even in such an embodiment, it is possible to jack up to the target height without performing the load receiving work of the heavy object using the temporary receiving material.

FIG. 7 is a diagram showing a modified example of the jack auxiliary device 1 of the present embodiment. The fixed plate 23A is applied to the modification shown in FIG. 7. The fixing plate 23A is not a U-shape but a hollow square shape. That is, in the fixing plate 23 shown in FIG. 1 and the like, a plate-shaped member is also arranged between the columns 21A and the columns 21D, and the upper ends of the four columns 21 are fixed to the annular plate member. Further, the reinforcing rib 25 is also provided between the support column 21A and the support column 21D.

Here, in the modified example shown in FIG. 7, when the jack device A is carried into the area surrounded by the four columns 21 and set, the fixed plate 23A becomes an obstacle rather than the fixed plate 23 shown in FIG. 1 and the like. If the jack device A is tilted and carried in, it can be easily set. Further, as compared with the fixing plate 23 shown in FIG. 1 and the like, the fixing plate 23A connects and fixes all the columns 21 in an annular shape, and the reinforcing rib 25 is also provided between all the columns, so that the second frame unit 20 is horizontal. The strength against stress in the direction can be further improved.

In the jack auxiliary device 1 of the present embodiment, when the jack device A is arranged in the area surrounded by the plurality of columns 21 of the second frame unit 20 and jacked up, the displacement due to the jacking up causes the first frame unit 10. It is transmitted to a heavy object through. Then, in a state where the displacement due to the jack-up is transmitted to the heavy object, each nut is lowered to each columnar male screw portion 12 of the first frame unit 10 exposed from the support column 21 through the opening 24 to hit the fixing plate. Move it to the position where it touches. This makes it possible to support the load of a heavy object in a jacked-up state.

Therefore, it is not necessary to perform the load receiving work of a heavy object using the conventional temporary receiving material, and the work efficiency and safety of jacking up are greatly improved. Further, since there is no operation of jacking down and depositing the load of a heavy object, even when the heavy object is jacked up by a plurality of jack devices A, when the load is transferred from the jack device A to the jack auxiliary device 1. The influence on heavy objects can be suppressed, and work efficiency and safety can be improved.

1 Jack auxiliary device 10 1st frame unit 11 Top surface 12 (12A, 12B, 12C, 12D) Columnar male thread 20 2nd frame unit 21 (21A, 21B, 21C, 21D) Strut 21a Hollow space 22 Base plate 22a Communication hole 23 Fixing plate 24 Opening 25 Reinforcing rib 30 Nut A Jack device

Claims (4)

A first frame unit having a top surface portion that transmits displacement due to jacking up to a heavy object, and a plurality of columnar male screw portions that are fixed to each of the four corners of the top surface portion and extend in the stroke direction of the jack.
A plurality of columns arranged at positions corresponding to each of the plurality of columnar male threaded portions and provided with a hollow space inside through which the columnar male threaded portions are inserted, and a plurality of base plates to which the lower ends of the plurality of columns are fixed. A second frame unit having a fixed plate in which the upper end of each of the columns is fixed and an opening through which the hollow space is inserted corresponds to each of the columns.
A plurality of nuts, which are screwed into each of the plurality of columnar male screw portions and are provided between the opening of the fixing plate and the top surface portion, are provided.
The first frame unit is exposed from the support column through the opening in a state where the displacement due to the jack-up of the jack arranged in the area surrounded by the plurality of columns of the second frame unit is transmitted to the heavy object. An auxiliary device for a jack, characterized in that each nut is moved to a position where it abuts on the fixing plate with respect to each of the columnar male screw portions to support a load of a heavy object in a jacked-up state. The fixing plate is a single U-shaped plate member to which a plurality of the columns provided at the four corners of the base plate are connected and fixed.
The auxiliary device for a jack according to claim 1, wherein the fixing plate is provided so that the U-shaped opening is located in a direction in which the jack is taken in and out of the area. The fixing plate is a single U-shaped plate member to which a plurality of the columns provided at the four corners of the base plate are connected and fixed.
The second frame unit is characterized in that a reinforcing rib for connecting the columns is provided between the columns other than the columns where the U-shaped opening of the fixing plate is located. The auxiliary device for a jack according to item 1 or 2. The jack auxiliary device according to claim 1, wherein the base plate of the second frame unit is provided with a communication hole communicating with the hollow space at a position corresponding to each of the plurality of columns. ..

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