JP2017218757A - Lifter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stable lifter capable of being disposed without requiring any space for a drive unit in a lower part of an installation plane.SOLUTION: A lifter 10 includes a post 12, an intermediate rod member 32 and a rod member 22 in this order, and further includes a drive unit 40 of meshing chain 46. Since the intermediate guide member 34 of the intermediate rod member 32 guides the intermediate rod member 32 with respect to the outer face of the post 12, the drive part 40 and the post 12 are parallelly disposed. With this, any space for the drive part 40 is not required in a lower part of an installation plane, and the post 12 is arranged so that the bottom is close to an installation plane. Thus, the lifter is entirely configured to have low center of balance while enhancing the stability.SELECTED DRAWING: Figure 1

Description

  The present invention uses an elevating device, specifically, an engaging chain (chuck chain) in which a column that extends when a pair of chains are engaged and a column is disassembled and shortened by releasing the engagement. Further, the present invention relates to a meshing chain type lifting device (hereinafter sometimes simply referred to as “lifting device”) including a rod member that moves forward and backward according to the extension and shortening of the meshing chain.

  A general lifting device includes a rod member that moves back and forth with respect to the column, and the rod member is configured to move forward and backward with respect to the column when a linear force is applied by hydraulic pressure, a ball screw, a meshing chain, or the like. Has been. Here, as an example of the raising / lowering device using a meshing chain, there exist some which are shown to patent documents 1-3.

JP-A-4-231560 Japanese Patent Laid-Open No. 2001-241211 JP2015-112673A

  In Patent Documents 1 to 3, a cylindrical column ("Mast part 12 at the bottom" in Cited Document 1, "Maximum Unit Pole 1a" in Cited Document 2, and "First Post 21" in Cited Document 3). On the other hand, a cylindrical rod member disposed on the inner side of the column ("mast portions 14 and 16" in cited document 1, "unit pole 1" excluding unit pole 1a in cited document 2, "middle stage" in cited document 3) A mesh chain type lifting device is disclosed in which the posts 22-27 and the upper post 28 ") are configured to move forward and backward.

  Conventionally, in the mesh chain type lifting device like the lifting devices of Patent Documents 1 to 3, a cylindrical column and a rod member are used, a rod member is disposed inside the column, and further, the rod member A so-called nested structure in which a meshing chain is disposed inside is generally used.

  However, in the case of a nested chain-type lifting device, a drive unit for sending the chain, which is composed of a sprocket or the like, must be installed below the column. Therefore, when fixing the support column to the installation surface, a space for the drive unit must be secured below the installation surface (see Patent Documents 1 and 3), or the drive unit is fixed to the installation surface, A support | pillar must be arrange | positioned on top (refer patent document 2). In the former case, it takes time to install the lifting device, and in the latter case, the column is located above the installation surface.

  SUMMARY OF THE INVENTION In view of the above-described problems of the prior art, the present invention has an object to provide an elevating apparatus that can be installed without providing a space for a drive unit below an installation surface and has high stability. To do.

The present invention includes a support,
Meshing chain,
A drive unit that is arranged in parallel with the support column and that meshes the meshing chain by sending the meshing chain or releases the meshing;
A rod member provided so as to be movable back and forth with respect to the column, and connected to the meshing chain;
The above problem is solved by an elevating device comprising a guide member of the rod member with respect to the outer surface of the support column.

  According to the present invention, since the guide member of the rod member guides the rod member with respect to the outer surface of the support column, the drive unit of the meshing chain can be arranged in parallel with the support column. There is no need to overlap the drive units. Therefore, it is not necessary to provide a space for the drive unit below the installation surface. Further, since the bottom surface of the support can be brought close to the installation surface, the entire lifting device can be lowered, and a highly stable lifting device can be realized.

  In addition, using a column and a rod member having a recess composed of three sides, the direction of the recess is the same direction, at least a part of the rod member in the recess of the column, and the drive unit in the recess of the rod member By arranging at least a part, a compact lifting device with a reduced installation area can be obtained.

  Further, by providing an intermediate rod member that moves forward and backward in conjunction with the rod member between the column and the rod member, the operating range of the lifting device can be increased.

The front view which shows the expansion | extension state of the raising / lowering apparatus of 1st embodiment of this invention. The side view which shows the shortened state of the raising / lowering apparatus of FIG. The top view of the raising / lowering apparatus of FIG. The top view of the raising / lowering apparatus of 2nd embodiment of this invention.

  An embodiment of the present invention will be described with reference to FIGS. However, the present invention is not limited to this embodiment.

  FIG. 1 shows the extended state of the lifting device 10 of the present invention. The lifting device 10 includes an intermediate rod member 32 and a rod member 22 in order from the support column 12. The intermediate rod member 32 and the rod member 22 are configured to be able to advance and retract relative to each other and the support column 12. The rod member 22 includes a top plate portion 26 and is used by placing an object on the top plate portion 26. The support column 12 includes a base 18 and is fixed to the installation surface via the base 18.

  The elevating device 10 includes a drive unit 40 that meshes the meshing chain 46 or releases the meshing by sending the meshing chain 46 (see FIG. 3). The drive unit 40 is juxtaposed with the support column 12 (see FIG. 2). A description with detailed illustration of the operation of the drive unit 40 and the meshing chain 46 is omitted, but in brief, the drive unit 40 is housed in the chain cases 42a and 42b and is not meshed. A pair of sprockets (not shown) that respectively send a pair of meshing chains in a state are stored, and the sprockets rotate according to the rotation of the input shaft 44 that is rotated by torque from a driving device such as a motor (not shown). It is configured. When the meshing chains accommodated in the chain cases 42a and 42b are sent in one direction by the sprocket, the chains are simultaneously meshed to form a column, and the column extends. On the other hand, when the chain is sent in the reverse direction by the sprocket, the meshing between the chains is released and the column is shortened.

  Since the meshing chain 46 is connected to the rod member 22 (including the top plate portion 26), the rod member 22 moves forward and backward with respect to the column 12 and the intermediate rod member 32 according to the length of the column of the meshing chain 46. To do. FIG. 2 shows a shortened state of the lifting device 10. Normally, when the column of the meshing chain 46 is extended, the rod member 22 advances from the state shown in FIG. 2 with respect to the intermediate rod member 32, and when the rod member 22 reaches the advance limit range with respect to the flow rod member 32, the intermediate rod member 32 is reached. Is configured to advance with respect to the column 12.

  The elevating device 10 includes a guide member 24 and an intermediate guide member 34 for smoothly moving the rod member 22 and the intermediate rod member 32 back and forth. The guide member 24 is configured to guide the rod member 22 with respect to the outer surface of the intermediate rod member 32, and the intermediate guide member 34 is configured to guide the intermediate rod member 32 with respect to the outer surface of the column 12. Yes. As the guide member 24 and the intermediate guide member 34, a roller or a needle may be used in addition to the slider type as shown.

  Conventionally, the column and rod member of the lifting device using the meshing chain are cylindrical, and since the guide member for the inner surface of the cylindrical column and rod member is provided, the meshing chain and the drive for moving the rod member forward and backward are driven. It was necessary to arrange the portion so as to overlap the support column and the rod member. However, by using the guide member 24 or the intermediate guide member 34 that guides the rod member 22 or the intermediate rod member 32 with respect to the outer surface of the intermediate rod member 32 or the support column 12 as in the lifting device 10, the support column 12 and the drive unit 40 can be juxtaposed. Further, in comparison with the conventional lifting device in which the components are concentrated toward the inside of the support column, the present invention attaches the components such as the rod member 22 and the guide member 24 to the outside of the support column 12. There is also an advantage that maintenance is easy.

  Moreover, as the support | pillar 12, the rod member 22, and the intermediate | middle rod member 32 of this invention, as shown in FIG. 3, the thing of the shape which has the recessed parts 13, 23, and 33 each comprised by 3 sides is used. Good. By arranging the recesses 13, 23, 33 in the same direction and disposing at least a part of the intermediate rod member 32 in the recess 13 of the support column 12, the installation area of the lifting device 10 can be reduced accordingly. Because it can be done. The rod member 22 is disposed so that at least a part thereof is positioned in the recess 33 of the intermediate rod member 32, and is further arranged so that at least a part of the drive unit 40 is positioned in the recess 23 of the rod member 22. By installing, the installation area of the lifting apparatus 10 can be further reduced.

  Covers C1, C2, and C3 that cover the recesses 12, 23, and 33 can be provided on the support column 12, the rod member 22, and the intermediate rod member 32, respectively. Specifically, the cover C <b> 1 covers the recess 13 of the support column 12, the recess 23 of the intermediate rod member 32, and the recess 23 of the rod member 22. The cover C2 covers the recess 23 of the intermediate rod member 32 and the recess 23 of the rod member 22, and the cover C3 covers the recess 23 of the rod member 22. With this configuration, it is possible to prevent dust and the like from entering the lifting device 10 regardless of whether the lifting device 10 is shortened or extended.

  Since the lifting device 10 includes the intermediate rod member 32, the operating range of the lifting device 10 can be increased correspondingly. However, as another embodiment of the present invention, the intermediate rod member 32 and the intermediate guide member 34 are provided. The guide member 24 may be configured to guide the rod member 22 relative to the support column 12. Conversely, an intermediate rod member and an intermediate guide member can be further provided to further increase the operating range of the elevating device.

  As the support column of the present invention, for example, an H-shaped support column 12 a as shown in FIG. 4 can be used. In this case, the lifting device 10 a can easily handle the uneven load compared to the support column 12. In addition, it cannot be overemphasized that a support | pillar may be made into another shape, The shape of a rod member or an intermediate | middle rod member can also be suitably changed similarly.

  As described above, according to the present invention, in the mesh chain type lifting device, the support column and the driving unit can be arranged side by side, so the space for the driving unit below the installation surface, which was necessary in the conventional lifting device, is It becomes unnecessary. Further, since the bottom surface of the support can be brought close to the installation surface, the entire lifting device can be lowered, and a highly stable lifting device can be obtained.

10, 10a Lifting device 12, 12a Column 13 Recess (column)
22 Rod member 23 Recess (Rod member)
24 Guide member 32 Intermediate rod member 33 Recessed portion (intermediate rod member)
34 Guide member 40 Drive part 46 Meshing chain

Claims (4)

Struts,
Meshing chain,
A drive unit that is arranged in parallel with the support column and that meshes the meshing chain by sending the meshing chain or releases the meshing;
A rod member provided so as to be capable of advancing and retreating with respect to the support column and connected to the meshing chain;
It comprises a guide member of the rod member with respect to the outer surface of the support column,
lift device. The support column and the rod member have a recess composed of three sides,
The direction of the recess is the same direction,
The lifting device according to claim 1, wherein at least a part of the rod member is positioned in the recess of the support column, and at least a part of the drive unit is positioned in the recess of the rod member. Struts,
Meshing chain,
A drive unit that is arranged in parallel with the support column and that meshes the meshing chain by sending the meshing chain or releases the meshing;
A rod member provided so as to be capable of advancing and retreating with respect to the support column and connected to the meshing chain;
An intermediate rod member that is provided between the support column and the rod member, and moves forward and backward relative to the support column in conjunction with the rod member;
A guide member of the rod member with respect to the outer surface of the intermediate rod member;
It comprises an intermediate guide member of the intermediate rod member with respect to the outer surface of the support column,
lift device. The strut, the rod member, and the intermediate rod member have a recess composed of three sides,
The direction of the recess is the same direction,
At least a part of the intermediate rod member is positioned in the recess of the support column, at least a part of the rod member is positioned in the recess of the intermediate rod member, and at least one of the drive units is positioned in the recess of the rod member. The lifting device of claim 3, wherein the part is located.

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