JPH11301981A - Load supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a load supporting device easily operated and capable of performing fine adjustment. SOLUTION: A load supporting device is provided with a cam arm 16, a seat plate 18, a shim plate 20 and a screw member 22. The cam arm has an operation part 24, an input part 25 spaced from the operation part in a horizontal direction, and a fulcrum part 26 spaced from the operation and input parts in horizontal and lower directions. The seat plate is arranged between the cam arm and a load body 10, and has an engaging part 36 brought into contact with the operation part of the cam arm and a screw hole 37 provided in a place corresponding to the input part of the cam arm spaced from the engaging part in a horizontal direction so as to penetrate in upper and lower directions. The shim plate is disposed between the cam arm and a fixed body 12. The screw member is screwed into the screw hole of the seat plate, and brought into contact with the input part of the cam arm to input a supported load to the cam arm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load supporting device, for example, a load body such as a pillar to be placed at a predetermined position in a building under construction, and a fixed body such as a pillar already placed at a predetermined position. The present invention relates to a device that is installed in a clearance between a body and a body to support the load of a load body. In addition to the above, the load support device can be used as an elevating device for countermeasures against land subsidence at a sea reclamation airport, as a maintenance jack, and as a leveling device for an installation machine tool, and can also be used as a simple jack.

[0002]

2. Description of the Related Art For example, in a building under construction, a load such as a pillar to be arranged at a predetermined position from now on is fixed to a fixed body such as a pillar already arranged at a predetermined position. It is necessary to accurately determine the position. Therefore, positioning is performed using a dedicated load supporting device. The load supporting device preferably satisfies requirements such as easy operation, fine adjustment of pushing and pulling down of the load body, inexpensiveness, and small size.

[0003] The present invention provides a load supporting device that can satisfy the above requirements.

[0004]

SUMMARY OF THE INVENTION The present invention relates to an apparatus for supporting a load applied from a load, which is installed in a gap between the load and a fixed body. , A seat plate, and a screw member. The cam arm has an operating portion, an input portion laterally spaced from the operating portion, and a lateral direction from the operating portion and the input portion.
And a fulcrum that is spaced downward and that contacts the fixed body. The seat plate is disposed between the cam arm and the load, and is in contact with the load.
The cam arm has an engaging portion that comes into contact with the operating portion, and a screw hole that is provided at a position corresponding to the input portion of the cam arm and that is laterally spaced from the engaging portion and that penetrates vertically. The screw member is screwed into a screw hole of the seat plate, and comes into contact with an input portion of the cam arm to input a support load to the cam arm.

When the load of the load body is to be supported, the cam arm and the seat plate are inserted into the clearance between the load body and the fixed body, the fulcrum of the cam arm is fixed to the fixed body, and the upper surface of the seat plate is fixed to the load body. Make contact. When the screw member is screwed into the screw hole of the seat plate and the tip of the screw member is brought into contact with the input portion of the cam arm, and the screw member is further screwed, the working portion of the cam arm becomes
A supporting load increased according to the ratio of the distance from the acting portion to the fulcrum and the distance from the input portion to the fulcrum, ie, the arm ratio. This supporting load supports the load body. The reaction force at this time is received by the fixed body.

[0006] The load of the load body can be supported simply by inserting the cam arm and the seat plate of the load support device into the clearance between the load body and the fixed body and screwing the screw member, so that the operability is good.
Further, the load can be pushed up by screwing in the screw member, and the load can be lowered by unscrewing the screw member, and fine adjustment by the screw is possible. Since the load supporting device is composed of three parts, it is inexpensive and can be downsized by appropriately selecting the arm ratio. Further, when any one of the three parts is damaged, the part can be replaced and used, and the parts can be replaced easily.

According to another aspect of the present invention, a load supporting device includes a cam arm, a seat plate, a shim plate, and a screw member. The cam arm and the seat plate can be formed basically in the same manner as in the first aspect of the invention, but the fulcrum of the cam arm does not contact the fixed body. The shim plate is disposed between the cam arm and the fixed body, and comes into contact with a fulcrum of the cam arm and the fixed body.

When the load of the load body is to be supported, the cam arm, the seat plate and the shim plate are inserted into the gap between the load body and the fixed body, the fulcrum of the cam arm is placed on the shim plate, and the upper surface of the seat plate is loaded. The body and the shim plate are brought into contact with the fixed body. Thereafter, as in the first aspect, the screw member is screwed in to apply a supporting load to the action portion of the cam arm.

According to this invention, the same effects as those of the first invention can be obtained. In addition, by inserting the shim plate between the cam arm and the fixed body, it is possible to adjust the clearance when the clearance between the load body and the fixed body is larger than the entire thickness of the cam arm and the seat plate.

When a shim plate is provided, it is preferable that the cam arm, the seat plate, and the shim plate are connected to each other by a string.

When the work using the load supporting device is performed at a high place, it is possible to drop one or more parts when installing or removing the load supporting device by connecting them with each other with a string. Character can be reduced.

It is preferable that the action portion of the cam arm has a cylindrical surface convex upward, and in this case, the engaging portion of the seat plate is concave upward and has a cylindrical shape. It has a cylindrical surface that matches the surface.

[0013] Since the cylindrical surface of the working portion of the cam arm meshes exactly with the cylindrical surface of the engaging portion of the seat plate, when the screw member is screwed to rotate the working portion of the cam arm about the fulcrum, slippage occurs on both cylindrical surfaces. Occurs. As a result, the seat plate moves laterally with respect to the cam arm.

Since the cylindrical surface of the working portion of the cam arm and the cylindrical surface of the engaging portion of the seat plate are in surface contact, the supporting load can be increased. In other words, the size of the load supporting device can be further reduced. In addition, since the movement of the seat plate in the lateral direction with respect to the cam arm means that the seat plate also moves in the lateral direction with respect to the load body, the inclination of the load body caused by the rotation of the working portion of the cam arm is prevented. This allows accurate positioning of the load body.

It is preferable that the fulcrum of the cam arm has a cylindrical surface that is convex downward.

When the cylindrical surface of the fulcrum contacts the fixed body or the shim plate, the contact becomes a line contact, and the supporting load can be increased.

[0017]

FIG. 1 is a side view of a load supporting device according to the present invention.
2 and FIG. 3 in a perspective state, the load 1
It is installed in a gap 14 between the zero and the fixed body 12 and supports a load applied from the load body 10, and includes a cam arm 16, a seat plate 18, a shim plate 20, and a screw member 22.

The load body 10 is, for example, an extension attached to a column to be guided to a predetermined position in a building under construction, and the fixed body 12 is an extension attached to a column already built at a predetermined position. The extension is attached to the column or beam when positioning the column or beam to facilitate use of the load supporting device.

The cam arm 16 has an action portion 24, an input portion 25 laterally spaced from the action portion 24, and a lateral and downward interval from the action portion 24 and the input portion 25. And a fulcrum portion 26 that comes into contact with the fixed body 12. Although the input unit 25 is located in the lateral direction of the action unit 24, this is not just beside, and even if the input unit 25 is above the action unit 24,
Conversely, it may be below. On the other hand, the fulcrum part 26 is located downward in the lateral direction of the action part 24 and the input part 25,
A lever is formed by the action part 24, the input part 25, and the fulcrum part 26.

In the embodiment shown, the cam arm 16 is formed by grinding and normalizing structural carbon steel into the following shape. As shown in FIG.
4 has a cylindrical surface 27 convex upward, and a fulcrum 26 of the cam arm 16 has a cylindrical surface 28 convex downward.
Having. The cylindrical surface 27 and the cylindrical surface 28 are formed by connecting circular arcs of radii R ₁ and R ₂ , respectively, over a certain width perpendicular to the paper surface. The radii R ₁ and R ₂ may be the same size or may be different sizes. For example, when defining the length L ₁ is called the cam arm 16 to 120-150Mm, it defines a center distance L ₂ of the cylindrical surface 27, 28 10-30 mm, be defined radius R _1, R ₂ to 20-40mm it can. The width of the cam arm 16 perpendicular to the plane of the drawing is determined based on the required supporting load. Since the cylindrical surface 27 of the action portion 24 comes into surface contact with the engagement portion of the seat plate as described later, it is preferable to define the range so that the center angle α is approximately 100 to 120 °. On the other hand, the cylindrical surface 28 of the fulcrum 26
May be in line contact with the shim plate 20 or the fixed body 12 to function as a fulcrum, and the central angle may be several degrees. Above the cam arm 16, an inclined surface 29 is connected to the cylindrical surface 27, and a horizontal surface 30 is connected to the inclined surface 29. On the other hand, on the lower side of the cam arm 16, two inclined surfaces 31, 32 are connected to the cylindrical surface 28, and the inclined surface 31
Is connected to an extension of the cylindrical surface 27, and the inclined surface 32 is connected to the vertical surface 33.

The seat plate 18 includes the cam arm 16 and the load body 10.
, And is in contact with the load body 10 in part, and is in contact with the action section 24 of the cam arm 16.
6 and a screw hole 37 which is provided at a position corresponding to the input portion 25 of the cam arm 16 and is vertically spaced from the engagement portion 36 and penetrates vertically. In the embodiment shown, the seat plate 18 is made by grinding structural carbon steel,
The engagement portion 36 of the seat plate 18 has a cylindrical surface that is concave upward. This cylindrical surface fits and snugly fits the cylindrical surface of the working part 24 of the cam arm 16. Load body 1 of seat plate 18
The portion that comes into contact with 0 is preferably a surface having a low coefficient of friction. For example, the coefficient of friction is reduced by increasing the finishing accuracy of the surface or by fitting a resin plate such as nylon.

The shim plate 20 includes the cam arm 16 and the fixed body 1.
2 and is in contact with the fulcrum 26 of the cam arm 16 and the fixed body 12. The shim plate 20, as shown,
The cam arm 16 is formed so that the surface 21 that contacts the fulcrum 26 is an inclined surface. Thereby, the cam arm 16
The shim plate 20 can be inserted into the fulcrum 26 and the fixed body 12 even when the size of the gap between the fixed body 12 and the fixed body 12 changes. It is also possible to mount the cam arm 16 directly on the fixed body 12. In this case, shim plate 2
0 can be omitted.

The screw member 22 is screwed into a screw hole 37 of the seat plate 18 and comes into contact with the input portion 25 of the cam arm 16 to input a support load to the cam arm 16. In the illustrated embodiment, a hexagon socket head cap screw is used. It is. The tip of the screw member 22 or the surface of the input section 25 of the cam arm 16 preferably has a low coefficient of friction. For example, the tip of the screw member 22 is made to have a spherical surface, or a resin plate such as nylon is attached to the input section 25 to have a low friction coefficient.

The cam arm 16, the seat plate 18 and the shim plate 20 are preferably connected to each other by a string 40. For this purpose, the cam arm 16, the seat plate 18, and the shim plate 20 are provided with seats 42 having through holes, and a string-like body 40 such as a wire or a rope is connected through the through holes of these seats. .

When the load supporting device is to be used, first, the cam arm 16 and the seat plate 18 are inserted into the gap between the load body 10 and the fixed body 12, and then the shim plate 20 is inserted. The adjustment by 20 is not troublesome. Insert the tool 44 into the hexagonal hole of the screw member 22 to insert the screw member 2
2, the input section 25 of the cam arm 16 is pushed downward, and the action section 24 of the cam arm 16
And move upward. Thus, a load can be applied to the load body 10. Cam arm 16
With the movement of the action portion 24, the cylindrical surface of the action portion 24 and the cylindrical surface of the engaging portion 36 of the seat plate 18 are engaged, so that the seat plate 18 moves in the horizontal direction. The load of the load body 10 is received by friction between the screw member 22 and the screw hole 37 of the seat plate 18.

[Brief description of the drawings]

FIG. 1 is a side view showing a use state of an embodiment of a load supporting device according to the present invention, in which movement of a cam arm is shown by a virtual line.

FIG. 2 is an enlarged side view of a cam arm.

FIG. 3 is an exploded perspective view of an embodiment of the load supporting device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Load body 12 Fixed body 14 Clearance 16 Cam arm 18 Seat plate 20 Shim plate 22 Screw member 24 Working part 25 Input part 26 Support point part 36 Engagement part 37 Screw hole

Claims (5)

[Claims] 1. A device installed in a clearance between a load body and a fixed body to support a load applied from the load body, comprising: an operation section; and an input section spaced laterally from the operation section. A cam arm having a fulcrum that is laterally and downwardly spaced from the action section and the input section and that contacts the fixed body; and a cam arm disposed between the cam arm and the load body, An engaging portion that is in contact with the load body and is in contact with the action portion of the cam arm, and is provided at a portion corresponding to the input portion of the cam arm, spaced from the engaging portion in the lateral direction; A load supporting device, comprising: a seat plate having a screw hole vertically penetrating; and a screw member screwed into the screw hole of the seat plate and in contact with an input portion of the cam arm to input a support load to the cam arm. . 2. A device installed in a clearance between a load body and a fixed body to support a load applied from the load body, comprising: an action section; and an input section spaced laterally from the action section. A cam arm having a fulcrum part laterally and downwardly spaced from the action part and the input part; and a seat plate disposed between the cam arm and the load body and in contact with the load body. And an engaging portion that comes into contact with the operating portion of the cam arm, and a screw hole that is provided at a portion corresponding to the input portion of the cam arm and is vertically spaced from the engaging portion, and penetrates vertically. A shim plate disposed between the cam arm and the fixed body and in contact with a fulcrum of the cam arm and the fixed body; and an input section of the cam arm screwed into a screw hole of the seat plate. In contact with the cam arm And a screw member for inputting a bearing load, load bearing device. 3. The load support device according to claim 2, wherein the cam arm, the seat plate, and the shim plate are connected to each other by a string. 4. The operating portion of the cam arm has an upwardly convex cylindrical surface, and the engaging portion of the seat plate is upwardly concave and is compatible with the cylindrical surface of the operating portion. The load supporting device according to claim 1, wherein the load supporting device has a cylindrical surface. 5. The load support device according to claim 1, wherein the fulcrum portion of the cam arm has a cylindrical surface convex downward.