JPH078392U - lift device - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention is to raise an elevating table on which articles and the like are placed,
A lifting device for lowering. [Structure] The lifting table is attached to the joint plate (13), and the nut mounting body (11) is fixed to the nut (10) screwed to the ball screw (3) rotated by the driving body. ), A swing body (12) is swingably attached via a joint pin B, and the joint plate (13) is swung on the swing body (12) via a joint pin A in a direction different from the joint pin B. It is installed and configured as much as possible.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an elevating device that elevates and lowers an elevating table on which articles and the like are placed.

[0002]

[Prior art]

 Conventionally, as an example of an elevating device, in a garage of a two-stage automobile, a lifting platform is raised and lowered via a chain. However, since the chain is subject to considerable load and wear, we have installed a stop mechanism in case of regular replacement or breakage. Therefore, it is disadvantageous in terms of production. Therefore, there is a lifting device that uses a ball screw to raise and lower the lift, but this device is more economical than a chain because it is replaced less frequently and a stop mechanism is not required.

[0003]

[Problems to be solved by the device]

 However, if a ball screw is used, it can be raised and lowered without inconvenience when the load weight to be placed on the elevator is light, but when a heavy object such as an automobile is placed and lifted, the ball screw bends. It may not be possible to move up and down. Then, this invention provides the raising / lowering apparatus which eliminates the said inconvenience.

[0004]

[Means for Solving the Problems]

 In the lifting device according to claim 1, the lifting table is mounted on the joint plate, the nut mounting body is fixed to a nut screwed to a ball screw rotated by a driving body, and the nut mounting body is swung via a joint pin B. A swing body is freely attached, and the joint plate is swingably attached to the swing body in a direction different from that of the joint pin B via a joint pin A. According to a second aspect of the present invention, the lift table is attached to a joint plate having a cutout opening at the lower end edge, and the joint pin A is inserted into the cutout opening of the joint plate to a nut that is moved up and down by a driving body. A detector C is provided at the lower limit stop position and a detector D is provided at the lower end position, and a stop platform that can stop the lifting platform at the lower limit stop position is provided. When the above is detected, the driving body is stopped. A third aspect of the present invention is an elevating device having the constituent features of the first and second aspects.

[0005]

[Action]

 According to the first aspect of the present invention, the nut is not affected by the bending of the lifting table in the vertical and horizontal directions, and the nut is screwed into the ball screw to enable smooth lifting. That is, with respect to the vertical deflection of the lift table, the swinging body swings about the joint pin A, while the swinging body swings around the joint pin B with respect to the horizontal deflection, so that the nut is The effect of bending is reduced, allowing smooth elevation. According to the second aspect, when the elevator is further lowered from the lower limit stop position, the elevator is placed on the stopper and the notch opening is formed at the lower edge of the joint plate. Therefore, the elevator is cut from the nut. When released and detected by the detector D at the lower limit position, the driving body can be stopped, so that safety can be ensured. According to claim 3, the bending of the lift table according to claim 1 in the vertical direction and the horizontal direction is absorbed, and as described in claim 2, the lift table does not descend and does not stop at the lower limit position. Can also be stopped at the lower limit position.

[0006]

【Example】

 Embodiments will be described with reference to the drawings. 1 is a front sectional view of a cantilever lifting device, FIG. 2 is a right side view of FIG. 1, and FIG. 3 is a sectional view taken along line AA of FIG. In the lifting device, a pair of columns 2 are erected on a base plate 1, and a driving body (motor) 4 of a ball screw 3 is installed near the top. On the other hand, the elevating table 5 is fixed to a slider 6 and ascends and descends via a guide body 8 which fits and slides on a guide rail 7 fixed to the column 2. FIG. 4 shows components forming the joint between the slider 6 and the nut 10 of the ball screw, FIG. 5 is a perspective view of the assembled state, FIG. 6 is a view taken in the direction of arrows BB of FIG. 5, and FIG. 5 is a view taken along the line C-C in FIG. Reference numeral 10 denotes a nut that fits into a ball screw 3 vertically provided at the center between the columns 2. A bottom bottom plate is provided with a hole 10a for a nut mounting body, which will be described later, and 10b is a fixing bolt thereof. is there. Reference numeral 11 denotes a nut mounting body, and a hole 11c into which the nut 10 can be inserted is formed in the center of a flat plate, and a bolt hole 11d that can be screwed with the bolt 10b is formed. Further, ribs 11a are vertically provided at both ends of the flat plate of the nut mounting body 11, and holes 11b into which the joint pins B can be fitted are formed. Reference numeral 12 is a swing body having a hole 12c into which the nut 10 can be inserted and a rib 16 vertically extending from each side. The rib 16 has a joint pin A and a joint pin B. A pair of holes 12a and 12b that can be fitted to each other are formed at right angles to each other and at opposing positions. A joint plate 13 has a notch opening 13a formed at the lower end edge at a position corresponding to the hole 12a and is fixed to the slider 6.

The components of each of the above components are assembled as shown in FIGS. That is, after inserting the nut 10, the nut mounting body 11, and the swing body 12 into the ball screw 3, first, the nut mounting body 11 is fixed to the nut 10 screwed to the ball screw 3 via the bolt 10b. Then, when the swing body 12 is fitted into the nut mounting body 11 and the joint pin B is inserted into the holes 11b and 12b, the swing body 12 is swingable around the joint pin B 1. Next, when the joint pin A is inserted into the hole 12a and the notch opening 13a of the joint plate 13 is placed on the joint pin A, the joint plate 13 is swingable around the joint pin A. It That is, the joint pin A and the joint pin B are formed so as to be swingable in different directions with respect to the lift table 5.

Next, the operation of the above configuration will be described. When the driving body (motor) 4 is driven, the nut 10 moves up or down. That is, as the nut 10 moves up and down, the lift base 5 moves up and down via the nut mounting body 11, the swing body 12, and the joint plate 13 mounted on the joint pin A. When a heavy object such as an automobile is placed on the lift table 5 and moved up and down, the lift table 5 moves up and down while bending vertically and / or horizontally. Therefore, when the lift table 5 bends in the vertical direction, the joint plate 13 swings about the joint pin A (swings about the X-axis shown in FIG. 5), and such deflection directly affects the nut 10. Reduce. On the other hand, when the elevating table 5 bends in the left-right direction, the bending through the joint plate 13 is transmitted to the swing body 12, and the swing body 12 swings around the joint pin B (Y-axis center shown in FIG. 5). ), And reduce the direct effect on the nut 10. As a result, the nut 10 and the ball screw 3 can be screwed up and down smoothly without any deviation. In the above example, the joint pin A and the joint pin B are formed so as to be able to swing in directions different from each other by 90 degrees, but in consideration of the strain direction of the mounting table, etc., they swing at other angles. It may be configured as possible.

Next, FIGS. 8 and 9 are views showing the lower part of the lifting device, showing a structure for stopping the lifting platform 5 at a predetermined position. Reference numeral 31 is a stop table for stopping the elevating table 5 at the lower limit position, and it can be stopped by mounting it on the projection 30 protruding from the slider 6. It should be noted that if the stop base 31 is installed directly below the slider 6, the protrusion 30 is unnecessary. The detector C (limit switch) is installed so that the lift table 5 can be stopped at the lower limit position, and the limit switch C is operated by the slider 6. On the other hand, the detector D (limit switch) is installed in the lower end position below the installation position of the detector C, and is attached so as to be operated by the nut mounting body 11. When the detector C and the detector D are activated (ON), the driving body 4 is stopped via a control device (not shown). It is designed to stop at a position where it is not placed on the stop table 31. When the nut 10 is lowered by the rotation of the driving body 4 to lower the lifting table 5, the detector C is actuated by the slider 6, the driving body 4 is stopped by a control device (not shown), and the lifting table 5 is moved. Stop at the lower limit position (Fig. 8). However, when the driving body 4 is not stopped due to a failure of the detector C, the projection 30 is placed on the stop base 31, and the notch opening 13a formed in the joint plate 13 causes the joint plate 13 to move. 13 and the joint pin A (nut 10) are cut off, and only the nut 10 continues to descend. Then, when the nut 10 further descends and the detector D operated by the nut body 11 detects it, the driving body 4 is stopped via a control device (not shown). Thus, even if the driving body 4 cannot be stopped by the detector C installed at the lower limit position, only the nut 10 descends and the driving body is stopped by the detector D installed at the lower limit position. Therefore, the safety can be improved. This structure is not limited to the ball screw type, but is also effective for a chain type lifting device. In the case of the chain type, the structure is such that the end of the chain is fixed to the nut to move up and down. do it.

[0010]

[Effect of device]

 Since the lifting device of the present invention swings around the joint pin A and the joint pin B even when the lifting platform bends in the vertical direction and / or the lateral direction, the influence on the nut can be reduced. , The nut can move up and down smoothly with respect to the ball screw. Also, even if the detector that detects the lower limit position fails, only the nut descends and the detector installed at the lower limit position can safely stop.

[Brief description of drawings]

FIG. 1 is a front sectional view of a cantilever lifting device.

FIG. 2 is a right side view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a view showing components forming a joint between a slider and a nut of a ball screw.

5 is a perspective view showing a state where the parts shown in FIG. 4 are assembled.

FIG. 6 is a view taken in the direction of arrows BB in FIG.

FIG. 7 is an arrow view including a C-C cross section of FIG. 5;

FIG. 8 is a perspective view showing a lower portion of the lifting device.

FIG. 9 is a view showing the lower part of the lifting device and explaining the operation.

[Explanation of symbols]

 4 Driving body 5 Lifting table 10 Nut 11 Nut mounting body 12 Swinging body 13 Joint plate 13a Notch opening 30 Projection body 31 Stopping base A, B Joint pin C, D Detector

Claims (3)

[Scope of utility model registration request] 1. A lifting plate is attached to a joint plate, a nut mounting body is fixed to a nut screwed to a ball screw rotated by a driving body, and a swinging body is swingably attached to the nut mounting body via a joint pin B. The joint pin B is attached to the swing body via the joint pin A.
A lifting device, wherein the joint plate is attached so as to be swingable in a different direction. 2. A lift plate is attached to a joint plate having a cutout opening at a lower edge thereof, and a joint pin A is inserted into a cutout opening of the joint plate in a nut which is moved up and down by a driving body. Is provided with a detector C and a detector D at the lower end position, and a stop table capable of stopping the lift table at the lower limit stop position is provided. When the detector C or the detector D detects Lifting device characterized by stopping. 3. A lifting plate is attached to a joint plate, a nut mounting body is fixed to a nut screwed to a ball screw rotated by a driving body, and a swinging body is swingably attached to the nut mounting body via a joint pin B. The joint pin B is attached to the swing body via the joint pin A.
The joint plate is attached so as to be able to swing in a direction different from that of the joint plate, a notch opening is formed in the lower end edge of the joint plate, and the detector C is arranged at the lower limit stop position of the lift table and the detector D is arranged at the lower limit position. At the same time, a lifting table is provided, which can stop the lifting table at the lower limit stop position, and stops the driving body when detected by the detector C or the detector D.