JP6469763B2 - lift device - Google Patents

Description

  The present invention relates to an elevating device for elevating and lowering an object, and in particular, an object using a ball screw mechanism or the like moving forward and backward by rotating a screw shaft arranged in parallel with a column with a driving device such as a motor. The present invention relates to a lifting device that lifts and lowers an object and guides the lifting with a guide member.

  The lifting device using the ball screw mechanism is mainly composed of a lifting mechanism such as a support, a ball screw mechanism, a driving device that transmits torque from a driving unit such as a motor to the lifting mechanism, and a guide member that guides the lifting. Examples thereof are shown in Patent Documents 1 and 2.

JP, 2006-193786, A JP, 2006-196364, A

  Patent Documents 1 and 2 disclose an elevating device in which a motor, a gear box, and a ball screw mechanism are arranged on one of the left and right sides with respect to the opposing direction of a pair of support columns, and a work mounting base is arranged on the other side. . The forks attached to the work attachment bases of these lifting devices extend in a direction orthogonal to the direction in which the columns face each other.

  The lifting devices disclosed in Patent Documents 1 and 2 may be used alone or in pairs. However, in the maintenance of these lifting devices, when the fork is removed from the lifting base, the operator has to turn to the lifting object side to work, which may cause an accident. In addition, when a plurality of these lifting devices are used in one set and the total length of the lifting object is increased afterwards, the interval between the forks must be increased unless the intervals between the lifting devices are increased. It is inconvenient because it cannot be changed. In addition, when the object to be lifted is intended to achieve stable lifting even with a larger load, the column is enlarged or the space between the pair of columns is expanded to increase the mounting space for the guide member, and the guide member is enlarged. There is a need to increase the outer diameter of the screw shaft or increase the installation area of the entire lifting device due to a change in the size of each member.

  Therefore, in view of the above-described problems of the prior art, the present invention aims to provide a lifting device that is safe and easy to maintain. Further, the interval between each fork can be easily changed afterwards. It is an object of the present invention to provide an elevating device that can realize stable elevating without requiring a change in arrangement or an increase in installation area.

The present invention relates to an installation base, a fixing hole for the installation base, a driving device including an input shaft and a pair of columns disposed on the installation base, and a screw that is rotated by torque output from the driving device. A screw nut that moves forward and backward in the axial direction of the screw shaft by rotation of the shaft and the screw shaft, a lifting base that is connected to the screw nut and is positioned between the pair of struts, and a forward and backward movement of the screw nut and the lifting base A guide member for guiding the pair of struts, and a fork interlocking with the lift base;
The drive device is located outside the range of the elevating base and in any direction perpendicular to the opposing direction of the support column,
The fork is located on the other side in the orthogonal direction;
The guide member is a lifting device provided between the lifting base and each of the pair of support columns,
The above-mentioned problem has been solved by a lifting device characterized in that the lifting base and the fork extend from the orthogonal direction to the opposing direction.

  According to the present invention, since the fork extends from the orthogonal direction to the opposing direction of the support column in the opposing direction, in particular, when installing a plurality of the lifting devices of the present invention, the lifting object is located in the opposing direction of the support column. Will be located. Therefore, when removing the fork from the lifting base in the maintenance of the lifting device, the operator can work so as to be parallel to the lifting target, so that maintenance can be performed safely and easily.

  Further, (a) a lifting base and a relatively small guide member having a relatively large size in the opposing direction of the pair of support columns, and (b) a lifting base and a relatively large guide member having a relatively small size in the same direction. A configuration that can be selected and applied, a configuration in which the screw shaft is selected from any one of (c) a relatively large outer diameter screw shaft and (d) a relatively small outer diameter screw shaft, or drive If the apparatus is selected from any one of (e) a drive apparatus having a relatively large output capacity and (f) a drive apparatus having a relatively small output capacity, the arrangement of the pair of struts and the drive apparatus may be changed or moved up and down. Without increasing the installation area of the device, it is possible to provide a lifting device that performs stable lifting according to the load of the lifting target.

The cross-sectional view of the lifting device of the first embodiment of the present invention. The side view of the state which removed one support | pillar and guide member of the raising / lowering apparatus of 1st embodiment of this invention. The figure which showed the variation of installation of the raising / lowering apparatus of this invention. The figure which showed the screw shaft used for this invention. The figure which showed the drive device used for 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.

  A lifting device 10 shown in FIG. 1A includes an installation base 12 provided with a plurality of fixing holes 14, and a drive device 16 and a pair of support columns 22 are disposed on the installation base 12 ( (See also FIG. 2). The drive device 16 includes an input shaft 18, and torque is transmitted to the input shaft 18 from a drive device such as a motor (not shown). The torque transmitted to the input shaft 18 is transmitted to the screw shaft 20 disposed on the drive device 16 through a gear mechanism inside the drive device 16, and is also transmitted to the rotary shaft 19. The torque output from the rotating shaft 19 may be transmitted to the input shaft 18 of another lifting device 10. The struts 22 and 22 have a U-shaped cross section, but struts having other cross sections such as an H shape can also be used.

  When the screw shaft 20 rotates, the screw nut 23 screwed into the screw shaft 20 moves forward and backward in the axial direction of the screw shaft 20 according to the rotation direction of the screw shaft 20. As the screw shaft 20 and the screw nut 23, a ball screw mechanism, a trapezoidal screw mechanism, or the like can be applied. As shown in FIG. 2, a connecting member 25 is attached to the screw nut 23, and the connecting member 25 is connected to the elevating base 24 shown in FIG. The elevating base 24 is disposed so as to be positioned between the pair of support columns 22. A fork 28 is connected to the elevating base 24 on the side opposite to the side where the screw nut 23 is provided, and a guide member 26 that guides the advancing and retreating of the elevating base 24 with respect to each of the pair of columns 22 and 22. , 26 are provided. The guide members 26 and 26 of the elevating device 10 are of a guide rail type, and another guide mechanism such as a roller can be used. However, in order to make the elevating device 10 compact, a pair of support columns 22 is used. , 22 is preferably configured so as to be guided with respect to the inner surface. As shown in the drawing, the fork 28 extends from the elevating base 24 to the fork 28 in a facing direction X from a direction Y orthogonal to the facing direction X of the pair of support columns 22 and 22.

  The positional relationship of each member demonstrated above is as follows. First, the driving device 16 is provided outside the range of the elevating base 24 and is disposed in any one of the orthogonal directions Y with respect to the opposing direction X of the pair of support columns 22 and 22. For this reason, the screw shaft 20 and the screw nut 23 provided on the drive device 16 are also located on the drive device 16 side with respect to the lifting base 24 provided between the pair of support columns 22 and 22. On the other hand, the fork 28 provided outside the range of the elevating base 24 is arranged in the other direction of the orthogonal direction Y to the opposing direction X of the pair of support columns 22 and 22. The guide members 26 and 26 are located between the elevating base 24 and each of the pair of support columns 22 and 22.

  As described above, the fork 28 of the lifting device 10 extends in the facing direction X from the direction Y orthogonal to the facing direction X of the support columns 22, 22, so that the lifting device 10, 100 shown in FIG. In the case where a plurality of objects are installed, the ascending / descending objects are located in the opposing direction X of the columns 22 and 22. When the elevating device shown in FIG. 6 of Patent Document 1 is arranged in parallel and the elevating base and the work mounting base are inspected, it is assumed that the elevating device enters under the elevating object. In such a case, the worker can work in a place other than the lower part of the object to be lifted, so that maintenance can be performed safely and easily.

  By the way, the fixing holes 14 provided in the installation base 12 of the lifting devices 10 and 100 are provided symmetrically with respect to the facing direction X of the pair of support columns. For this reason, the installation place of the raising / lowering apparatuses 10 and 100 can be replaced, and it can install as shown in FIG.3 (b). Thereby, the space | interval between the forks 28 and 28 can be changed in two ways, d1 and d2. Therefore, the interval between the forks can be easily changed afterwards.

  The lifting device 10 in FIG. 1A and the lifting device 10a in FIG. 1B have a lifting base 24 and a relatively small guide, the former having a relatively large size in the facing direction X of the pair of support columns 22 and 22. The latter includes a lift base 24a having a relatively small size in the facing direction X and a relatively large guide member 26a, 26a. As described above, the lift base 24 and the relatively small guide members 26 and 26 having a relatively large size in the facing direction X, or the lift base 24a and the relatively large guide member having a relatively small size in the facing direction X. If it is set as the structure which can select and apply any of 26a, 26a, without the arrangement change of a pair of support | pillars 22 and 22 and the drive device 16, or the increase in the installation area of the raising / lowering apparatus 10 and 10a, it is required. It can be set as the raising / lowering apparatus which can implement | achieve stable raising / lowering according to the load of the raising / lowering target object.

  Also, as shown in FIGS. 4 (a) and 4 (b), either a relatively small outer diameter screw shaft 20 and a relatively large outer diameter screw shaft 20a can be selected, or As shown in FIGS. 5A and 5B, the driving device 16a having a relatively small output capacity and the driving device 20 having a relatively large output capacity can be selected. A lifting device that can achieve stable lifting according to the load of the lifting object without changing the arrangement of the pair of support columns 22 and 22 or the drive device 16 or increasing the installation area of the lifting devices 10 and 10a. it can. In addition, you may make it the structure which can select two or all of the raising / lowering base demonstrated above, a guide member, a screw shaft, and a drive device.

  As described above, according to the present invention, it is possible to provide a lifting device that is safe and easy to maintain, and further, it is easy to change the interval between the forks afterwards. It is possible to provide an elevating device that can realize stable elevating without requiring an increase of.

10, 10a Lifting device 12 Installation base 14 Fixing hole 16 Drive device 18 Input shaft 20 Screw shaft 22 Post 23 Screw nut 24 Lifting base 26 Guide member 28 Fork

Claims (4)

An installation base, a fixing hole for the installation base, a driving device and a pair of columns provided with an input shaft, a screw shaft that is rotated by a torque output from the driving device, and the screw. A screw nut that moves forward and backward in the axial direction of the screw shaft by rotation of the shaft, a lifting base that is connected to the screw nut and is positioned between the pair of struts, and a forward and backward movement of the screw nut and the lifting base is supported by the pair of struts A guide member that guides against the lift, and a fork that interlocks with the lifting base,
The drive device is located outside the range of the elevating base and in any direction perpendicular to the opposing direction of the support column,
The fork is located on the other side in the orthogonal direction;
The guide member is a lifting device provided between the lifting base and each of the pair of support columns,
The lifting base to the fork extends from the orthogonal direction to the opposing direction,
lift device. The elevating base and the guide member are
(A) a lifting base having a relatively large dimension in the facing direction and a relatively small guide member;
(B) a lifting base having a relatively small size in the facing direction and a relatively large guide member;
The lifting device according to claim 1, wherein the lifting device is one selected from any of the above. The screw shaft is
(C) a relatively large outer diameter screw shaft;
(D) a relatively small outer diameter screw shaft;
The lifting device according to claim 1, wherein the lifting device is one selected from any one of the above. The drive device
(E) a drive device having a relatively large output capacity;
(F) a drive device having a relatively small output capacity;
The lifting device according to any one of claims 1 to 3, wherein the lifting device is one selected from any one of the above.

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