JP2585548Y2 - Lifter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lifter having a lifting platform driven up and down.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, a lifter 4 is supported on a base 2 by a pantograph-type link mechanism 3 so as to be able to move up and down, and a hydraulic drive unit drives the elevator 4 to move up and down. Are referred to as table lifters (or scissor lifts), and are widely used for transporting articles in the vertical direction, for adjusting the vertical position, and for raising and lowering work tables.
Specifically, for example, in a production factory, when unloading cargo on trucks, conveyors or pallets,
It is often used as a platform or receiving platform.

[0003]

[Problems to be Solved by the Invention] However, the lifter 1
When the elevator 4 is lowered, or when the elevator 4 is accidentally dropped due to a failure in hydraulic equipment, there is a danger that a nearby worker may be caught under the elevator 4 or the link mechanism 3. This is a serious safety problem, and the work efficiency is low because workers cannot work with peace of mind.

This invention solves the above-mentioned conventional problems, and aims to provide a highly safe lifter which can prevent a person from being caught in an elevating drive mechanism below the elevating platform or under the elevating platform. Things.

[0005]

According to a first aspect of the present invention, there is provided a lifter which supports a lift table on a base so as to be able to move up and down, and includes a driving device for driving the lift table to move up and down. A short inner cylinder surrounding the side portion of the elevating table is attached to the table, and a plurality of short cylinders having inner dimensions different from each other and including an outer cylinder and at least one intermediate cylinder are nested in the inner cylinder. The upper hook piece is fixed to the upper part of the intermediate cylinder toward the inside, and the lower hook piece facing the upper hook piece of the adjacent cylinder is attached to the lower part of the inner cylinder and the intermediate cylinder. A fixing member for fixing the outer cylinder and the base to a base, and supporting the intermediate cylinder at a lower end position.

A lifter according to a second aspect of the present invention is a lifter having a drive unit for supporting a lift table on a base so as to be able to move up and down, and for driving the lift table up and down. Attach a short inner cylinder surrounding the side of the inner cylinder, and fix it on the basis of the short outer cylinder fitted to this inner cylinder and the base.
It is characterized by having been specified .

[0007]

In the lifters of the first and second inventions, the inner cylinder and the intermediate cylinder (in the case of the first invention) or the inner cylinder (in the case of the second invention) have their upper ends attached to the side portions of the lifting platform. Lower end
Acts as a cover that fits into the outer cylinder and expands and contracts in the vertical direction, surrounds the side of the lower space of the elevator, and prevents a part of a person or a body from entering the lower side of the elevator.

[0008]

EXAMPLES Hereinafter by Figures 1-6 illustrating the first embodiment of this invention. The lifter 1 shown in FIG. 4 is a known lifter called a table lifter. The lifter 1 is supported on a base 2 by a pantograph type link mechanism 3 so as to be able to move up and down, and is connected to a hydraulic power unit 5a. The lifting table 4 is driven to move up and down by a driving device 5 including a cylinder 5b. In other drawings, the lifter 1
The internal mechanisms such as the ring mechanism 3 and the driving device 5 are not shown.

The base 2 of the lifter 1 is shown in FIGS.
Buried in the bottom 62a of the pit 62 of the foundation 61
A base frame 63 (described later) is fixed by bolts 64 . A turntable 10 is mounted on the upper surface of the lift 4 so that a circular table 13 is rotatably supported by rollers 12 supported on an annular receiving ring 11.

On the other hand, reference numeral 20 denotes a cover made of a steel plate which is vertically expandable and contractible. The large intermediate cylinders 23, 24, 25 are fitted in a nested manner. 26 is nested in the intermediate cylinder 25
An outer cylinder to be fitted, with a square frame-like edge material 26a at the top
I have. Then, the upper inside of the intermediate cylinders 23 to 25 (center line 21
Side), an upper hook piece 27 is fixed in a square frame shape over the entire circumference, and a short rod-like shape is provided on the outer side of the lower part of the inner cylinder 22 and the intermediate cylinders 23 and 24 so as to face the upper hook piece 27. Are fixedly attached. As shown in FIG. 6 , two lower hook pieces 28 are provided at each of the four corners of the inner cylinder and the intermediate cylinder.
There is.

The inner cylinder 22 is fixedly attached to the side surface of the elevator 4 via connecting members 31 and 32 so as to surround the side of the elevator 4, and the outer cylinder 26 is embedded and fixed on the foundation 61.
Is being worn. The base frame 63 to which the base 2 is fixed is
It is made by framing single-girder materials in a cross-girder shape.
It is fixed to the inner surface of the outer cylinder 26 by welding, and its end is
Functions as a support member 35 for supporting the intermediate cylinders 23 to 25.
Things. Reference numeral 65 denotes a mounting piece for mounting the base 2.
You.

Reference numeral 36 denotes a perforated upper plate surrounding the outside of the turntable 10, which is fixed on the lifting platform 4, and the outer edge of which is connected to the upper end of the inner cylinder 22. And, the intermediate cylinder 2 whose lower end is supported by the inner cylinder 22 and the base frame 63
The upper end surfaces of 3 to 25 and the outer cylinder 26 are substantially flush with the upper surface of the upper plate 36.

[0013] FIG. 5 shows the state of the foundation 61 before the lifter 1 is attached.
The outer cylinder 26 integrated with the base frame 63 is positioned and
The pit portion 62 and the floor surface 66
Forming a foundation 61 with a lift 1 therein, and
A cover 20 including an inner cylinder 22 and intermediate cylinders 23 to 25 is provided.
The lifter 6 having the cover 20 which expands and contracts
0 is obtained.

[0014] lifter 60 having the above structure, for example by positioning the end portion side of the conveyor line, the turntable 10
A pallet is placed on the pallet, and the height of the lifting table 4 is raised and lowered, and the height of the pallet can be adjusted, and the packing box or the like containing the product can be used for a loading operation such as a single or multi-tier operation by the operator on the pallet.

At this time, the operation of the driving device 5 causes the
Is lifted, the lower hooking piece 28 of the inner cylinder 22 that has risen integrally with the lifting platform 4 firstly contacts the adjacent outer intermediate cylinder 2.
3 is engaged with the upper hooking piece 27 to raise the intermediate cylinder 23, and similarly, the outer cylinder is sequentially pulled up, and in a state where the lifting platform 4 reaches the rising end, the state shown in FIG. Cover 2
0 surrounds the elevator 4 and its lower side.

When the lifting platform 4 is lowered from this state, the outermost intermediate cylinder 25 is first lowered and the lower end thereof is positioned on the base frame.
The cover 20 is shortened in such a manner that the intermediate cylinders 24 and 23 are successively supported at the lower end position. At this time, since the elevator 4 and its lower side are surrounded by the rigid cover 20, it is surely prevented that a person or an object is trapped under the elevator 4 or the link mechanism 3 where the object descends. Is done. In addition, the elevating stage S
Also when moving up and down to the intermediate position inside, the cover 20 in a partially shortened state can provide the same anti-jamming action. The outer cylinder 26 is fitted with the intermediate cylinder 25,
The space where the cover 20 smoothly descends when the table 4 descends
It functions as a secure outer frame member.

[0017] In the above embodiment, the base frame 63 is fixed to the outer cylinder 26.
The base frame 63 is separated from the outer cylinder 26, and
The frame 63 and the outer cylinder 26 are separately fixed to the foundation 61,
A separate support member for the bearing is provided on the outer cylinder 26 or the base frame 63 or the like.
It may be attached.

FIG . 7 shows a second embodiment of the present invention.
The vertical dimension of the inner cylinder 22 and the outer cylinder 26 is increased,
It has the same configuration as that of the first embodiment, except that 3 to 25 and the lower hooking piece 28 for hooking are omitted.
That is, the lifter 70 of this embodiment is provided with a one- stage telescopic cover 71 , which is suitable when the elevating step S of the elevating table 4 can be small, and the structure of the cover 71 is simple and inexpensive. Can be manufactured.

The present invention is not limited to the above embodiments. For example, in the above embodiment, each of the inner cylinder 22, the intermediate cylinders 23 to 25, and the outer cylinder 26 is a short rectangular cylinder. However, a cylindrical or polygonal cylindrical shape may be used according to the shape of the lift 4 and the like, and a metal is preferable as the constituent material, but a plastic material is used if the rigidity and strength are high. Can also. In addition, the number of intermediate cylinders in the first invention may be one or more. However, a larger number of intermediate cylinders can reduce the height of the cover when shortened, and can cope with a large ascending and descending stroke.

[0020] Furthermore, since in the above embodiment is provided with the turntable 10 on the lifting platform 4, it is convenient to the product of the luggage wholesale or the like, and by connexion turntable 10 the upper surface of the lifting table 4 is omitted in applications It may be exposed and used as a luggage loading surface or a foot scene, or another device such as a roller conveyor may be provided instead of the turntable 10. Further, as the lifter 1, a lifter having a lifting mechanism and a driving device of a different type from the above embodiment may be used.

[0021]

[Effect of the invention] As described above, according to the invention,
The inner cylinder, the outer cylinder, and the intermediate cylinder (in the case of the first invention ) surround the sides of the lower space of the lift platform and prevent people and objects from entering the lower side of the lift platform. It is possible to prevent an accident in which a person is caught in the lifting drive mechanism below the table or the lower part of the lifting table, and the safety is high. In addition, the worker near the lifter can work with peace of mind, and the work efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lifter showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1 (7).

FIG. 4 is a front view of the lifter 1 in FIG.

FIG. 5 Longitudinal section of the foundation before mounting the lifter 1 in FIG.
FIG.

FIG. 6 Partially cut-out showing the lifter lifting state of the lifter in FIG.
It is a front view.

FIG. 7 FIG. 7 is a diagram showing a second embodiment of the present invention, corresponding to FIG. 6.
You.

[Description of Signs ] 1 ... lifter, 2 ... base, 3 ... ring mechanism, 4 ... lifting platform,
5 ... Driver, 20 ... Cover, 22 ... Inner cylinder, 23 ... Intermediate cylinder, 24 ... Intermediate cylinder, 25 ... Intermediate cylinder, 26 ... Outer cylinder, 26a
... edge material, 27 ... upper hooking piece, 28 ... lower hooking piece, 31 ...
Connecting material, 32 ... Connecting material, 35 ... Support member, 60 ... Rif
Motor, 61 ... foundation, 62 ... pit portion, 63 ... base frame, 70 ...
Lifter, 71 ... cover.

Claims (2)

(57) [Scope of request for utility model registration] [Claim 1] to support the lifting platform to the base vertically movably, in lifter comprising a driving device for vertically driving the elevator platform, the inner cylinder of short surrounding said lifting platform side to said lifting table A plurality of short cylinders having different inner dimensions, each composed of an outer cylinder and at least one intermediate cylinder, are nestedly fitted in the inner cylinder, and are directed inward to the upper part of the intermediate cylinder. To fix the upper hook piece, and to the lower part of the inner cylinder and the intermediate cylinder, fix the lower hook piece facing the upper hook piece of the adjacent cylinder, and fix the outer cylinder and the base to the base. A lifter further comprising a support member for supporting the intermediate cylinder at a lower end position. 2. A lifter comprising a base for supporting a lifting platform so as to be able to move up and down, and a drive device for driving the lifting platform to move up and down, wherein the lifting platform surrounds a short inner tube surrounding a side portion of the lifting platform. And a short outer cylinder fitted to the inner cylinder and the base fixed to a base.