JP3370928B2 - Lifting device using meshing chain - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevating device for vertically moving or pushing up an object using a meshing chain that meshes with each other and integrally moves up and down.

[0002]

2. Description of the Related Art Conventionally, in order to move an object up and down or push it up, a pair of meshing chains which can be bent only in one direction, as described in, for example, Japanese Patent Application Laid-Open No. 8-169693, is used. Lifting devices have been proposed.

As shown in FIG. 6, the lifting device has a pair of meshes which are respectively wound around a pair of forward and reverse sprocket A2 and A3 which are rotatably supported by a machine base A1 and which are extended and retracted. The chains A4 and A5 are used, and the bending preventing restriction members f projecting from the opposite sides of the meshing chains A4 and A5 are meshed with each other.
It is designed so that it can move forward and backward when it extends vertically.

Further, the elevating device has a pair of accommodating portions A6 and A7 for accommodating the meshing chains A4 and A5, respectively, on the machine base A1, and the sprockets A2 and A5.
3 when it is rotated in the normal direction, the meshing chains A4, A5 respectively caught in the accommodating portions A6, A7.
When the sprocket is fed out and passes through the sprockets A2 and A3, the restricting members f of the meshing chains A4 and A5 on both sides mesh with each other to form a column having rigidity, and the upper end of the regulating member f pushes up an actuated member (not shown). Has become.

On the other hand, when these sprockets A2 and A3 are rotated in the reverse direction, the actuating member descends, and the respective meshing chains A4 and A5 are separated from the pair of sprockets A2 and A3 on both sides to accommodate the left and right storage parts A6 and A7. Is caught and stored.

[0006]

In the above-mentioned conventional lifting device, the storage portion A for the meshing chains A4 and A5 is used.
6, a guide rail A10 for guiding the meshing chains A4, A5 in drum-shaped cover cases A8, A9,
It is difficult to manufacture because it is configured by providing A11 in a spiral shape. Also, since the two storage parts A6 and A7 are individually mounted on the machine base A1, it is difficult to perform mounting work and adjustment of the mounting position. Therefore, there is a problem that the manufacturing cost becomes high.

Further, when the meshing chains A4, A5 are paid out and wound into the storage portions A6, A7, the restricting member f provided on the meshing chains A4, A5 slides on the guide rails A10, A11, so that friction occurs. There was a problem that power loss due to resistance increased.

Therefore, the present invention solves the problems of the prior art as described above, the structure of the housing portion of the meshing chain is simple, the manufacturing and assembling are easy, the manufacturing cost can be reduced, and the meshing chain is fed out. Another object of the present invention is to provide an elevating device using a meshing chain that can smoothly perform a storage operation.

[0009]

For the above-mentioned purpose, the lifting device using the meshing chain of the present invention is arranged such that the rotation axes are aligned front and back with respect to the machine base at positions where meshing teeth are opposed to each other. A pair of sprocket rotatably supported, a pair of sprockets, a drive source for rotating the pair of sprockets in opposite directions by synchronizing opposite meshing teeth with each other in opposite directions, and from a lower outer side of the pair of sprockets. The rollers mesh with these sprockets through the gap, and are bent vertically upward, and the meshing parts formed on the opposite sides above these sprockets mesh and move integrally, and In the lower part, bend and separate from the meshing sprockets on both sides,
A pair of meshing chains configured so as not to bend in the direction opposite to the bending direction, a load support member commonly attached to the upper ends of the pair of meshing chains, and a pair of sprockets. On the outer peripheral side of the meshing chain, arcuate guide surfaces for guiding each roller of the meshing chain are formed on both left and right sides, and a pair of meshes continuously meshed with each other above these arcuate guide surfaces. A pair of vertical guide surfaces that enter between the chains and guide the rollers of each meshing chain;
Roller guide slits are continuously provided on both left and right sides of the deflection guide portion and continuously guide the lower part of each arcuate guide surface so as to freely extend and retract between the opposed surfaces to guide and support the roller of the meshing chain. A plate-shaped chain guide made up of a storage guide portion, and a side provided on both sides of the front and back sides of the storage guide portion in the upper part of the entrance side of the roller guide slit, where the meshing portion of the meshing chain is formed. And a guide edge that abuts a flat side edge on the opposite side.

In the lifting device, it is preferable that the deflection guide portion and the storage guide portion of the chain guide are integrally formed of a single plate material. In addition, a plurality of pairs of sprockets are coaxially arranged in the machine front-rear direction, and a pair of meshing chains are knitted in multiple rows so that the rollers mesh with the corresponding sprockets. It is also preferable that a plurality of rollers are arranged in the front-rear direction and each of them is configured to guide the rollers of each row of the meshing chain.

[0011]

In the lifting device of the present invention, when the load supporting members connected to the upper ends of the pair of meshing chains are in the lowered position, most of the meshing chains are stored at the left and right sides of the chain guide. It is housed in the roller guide slit. Here, when the drive source is rotated in the forward direction, the pair of sprockets feeds the respective meshing chains upward.

Accordingly, the meshing chains, most of which are stored in the storage guides provided on the left and right sides of the chain guide, are deflecting guides while rolling the rollers in the roller guide slits. It is pulled out to the side, guided by the arcuate guide surface of the deflection guide portion and the vertical guide surface following it, deflected in the vertical direction, and sequentially meshes with a pair of sprockets.

At the same time, the opposite meshing portions of the meshing chains on both sides are successively meshed with each other, and the upper parts passing through these sprockets are integrated into a rigid columnar shape and attached to the upper ends of the pair of meshing chains. The load supporting member rises and pushes up the object.

On the other hand, when the drive source is rotated in the opposite direction, the pair of sprockets moves the respective meshing chains downward to lower the load supporting member. At this time, below the pair of sprockets, each roller of each meshing chain is sequentially guided from the vertical guide surface of the deflection guide section to the arcuate guide surface, and the meshing of the opposed meshing sections is disengaged. Then, the rollers sequentially enter the roller guide slits of the left and right storage guide portions from the deflection guide portion, and most of the meshing chains are stored again in the storage guide portion.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a side view and a plan view of a portion excluding a load supporting member, showing an embodiment of an elevating device using a meshing chain according to the present invention.

As shown in these figures, the lifting device 1 includes a pair of sprockets 3A and 3B having the same shape at the center of the machine base 2.
have. These sprockets 3A and 3B are fixed to driven shafts 4A and 4B that are rotatably supported with their axes aligned in the longitudinal direction of the machine base 2.

Interlocking gears 5A and 5B meshing with each other are fixed to the driven shafts 4A and 4B, respectively, and a driving gear 7 fixed to the output shaft of the speed reducer 6 meshes with one of the interlocking gears 5B. ing.

A motor 8 capable of rotating in the forward and reverse directions is connected to the speed reducer 6 as a drive source. The rotation of the motor 8 is reduced by the speed reducer 6, and the drive gear 7 moves the interlocking gears 5A, 5A.
B, so that the sprockets 3A and 3B are synchronously rotated in opposite directions.

The sprocket wheels 3A and 3B have a space between the meshing teeth facing each other, and the pair of meshing chains 9A and 9B are bent vertically upward from the lower outer sides of the sprocket wheels 3A and 3B to form the above-mentioned space. A roller R is provided so as to mesh with these sprockets 3A and 3B at a position where the roller R passes.

Above the sprockets 3A and 3B, hook-shaped meshing portions F formed by a part of the link plates of the meshing chains 9A and 9B mesh with each other so that both meshing chains 9A and 9B are formed. It is configured to move integrally in a columnar shape having rigidity, and the upper ends of the meshing chains 9A and 9B integrated in a columnar shape are
It is connected to a load support member 10 for receiving an object not shown.

Below the sprockets 3A and 3B, the meshing chains 9A and 9B are bent outward from both sprockets 3A and 3B meshing with each other so that the meshing portion F is separated. Moreover, the structure is such that bending in the direction opposite to the bending direction is restricted.

On the other hand, the machine base 2 has a meshing chain 9A,
A plate-shaped chain guide 11 for guiding and supporting 9B is provided. The chain guide 11 is provided below the pair of sprockets 3A and 3B, and the deflection guide portion 12 that deflects the directions of the meshing chains 9A and 9B by approximately 90 degrees.
And a pair of storage guide portions 13A and 13B that are continuously provided on both left and right sides of the deflection guide portion 12.

The deflection guide portion 12 includes the sprocket 3
FIG. 3 which guides each roller R of the chain on the outer peripheral side of the meshing chains 9A and 9B meshing with A and 3B.
The arc-shaped guide surfaces 12A and 12B shown in are formed on both the left and right sides, and the arc-shaped guide surfaces 12A and 12B are also formed.
A pair of vertical guide surfaces 12C and 12D that continuously enter above the respective shafts and enter between the pair of meshing chains 9A and 9B meshed with each other at the meshing portion F to guide the rollers R of the meshing chains 9A and 9B. Are formed.

Further, the storage guide portions 13A, 13B
Are fixed to the left and right sides of the deflection guide portion 12, and each of the arc-shaped guide surfaces 12A, 12 of the deflection guide portion 12 is fixed.
Roller guide slits 14A continuous to the lower part of B,
14B.

These roller guide slits 14A, 1
4B is a meshing chain 9A, 9B between the facing surfaces.
Guides the roller R so as to sandwich it and meshes with the chain 9
A and 9B are supported so that they can be extended and retracted, and extend to the outside on both the left and right sides of the deflection guide portion 12, and then are folded back upward near the outer end portions of the respective storage guide portions 14A and 14B to the vicinity of the inner end portion. Has been formed.

Guide edges 15A and 15B are attached to the upper portions on the inlet side of the roller guide slits 14A and 14B formed in the storage guide portions 13A and 13B, respectively.

These guide edges 15A and 15B are
The meshing chain 9 is provided on each of the front surface side and the rear surface side of the storage guide portions 13A and 13B.
The meshing chain 9 is brought into contact with the flat side edge of the A and 9B link plates opposite to the side where the meshing portion F is formed.
The inclination of A and 9B is prevented, and the roller R of the meshing chains 9A and 9B is smoothly entered into the roller guide slits 14A and 14B.

Next, FIG. 4 shows the chain guide 11 'in which the deflection guide portion 12' and the storage guide portions 13'A, 13B 'are formed of a single metal plate, and the function thereof is as shown in FIG.
It is the same as the chain guide 11 shown in FIG. The guide edges 15A and 15B are the same as those shown in FIGS. 1 to 3.

FIG. 5 is a plan view showing another embodiment of the lifting / lowering device of the present invention in which the load supporting member is not shown. The lifting / lowering device 21 shown in FIG.
A and 29B are of a double row knitting in which rollers R are arranged in two rows, and the sprockets 23A and 23B meshing with the meshing chains 29A and 29B are respectively driven shafts 24.
Two are fixed to each of A and 24B.

The driven shafts 24A and 24B are respectively fixed to interlocking gears 25A and 25B meshing with each other, and one interlocking gear 25B is provided with a drive gear 27 fixed to the output shaft of the speed reducer 26. It is in mesh.

A motor 28 capable of rotating in the forward and reverse directions is connected to the speed reducer 26 as a drive source.
The sprocket 23A, 23B is rotated by 8.

Further, two chain guides 11 having the structure shown in FIG. 3 are vertically arranged side by side in the front-rear direction of the machine base 22, and each roller R in the corresponding row of the meshing chains 29A and 29B is respectively arranged. Supports the guide. In place of these chain guides 11, a chain guide 11 'made of a single plate material shown in FIG. 4 may be used.

In the lifting device 21 shown in FIG. 5, the meshing chains 29A and 29B have a two-row organization,
It is also possible to use a three-row knitting machine or more, and in that case, the load capacity can be increased by constructing a pair of sprockets and a chain guide in three or more groups.

Further, in each of the above-described embodiments, the roller guide slits formed in the storage guide portions on both the left and right sides of the chain guide extend to the left and right outer sides of the deflection guide portion, and the outer ends of the respective storage guide portions. Although it is folded back upward near the edge part and is formed near the inner end part, the roller guide slit may be formed in a symmetrical spiral shape on both left and right sides of the deflection guide part. Since the length of the meshing chain that can be stored in the portion can be increased, the lifting stroke of the load supporting member can be increased.

[0035]

As described above, according to the first aspect of the present invention, the storage guide portion for storing the left and right separated meshing chains on both sides of the deflection guide portion for diverting the meshing chains. Since the plate-shaped chain guides are used in series, the chain guides can be easily aligned with the machine base with high accuracy when assembling the lifting device. Since it can be easily manufactured by a method such as processing, the manufacturing cost of the lifting device can be reduced.

Moreover, in the accommodating guide portion of the chain guide, since each roller of the meshing chain is guided between the facing surfaces of the slits for guiding the roller, there is little friction when the meshing chain moves, and when the meshing chain moves up and down. Power loss can be reduced. Guide edges are provided on both the front side and the back side of the storage guide section in the upper part of the entrance side of the roller guide slit, and the flat side edge on the side opposite to the side where the meshing section of the meshing chain is formed. By abutting against the meshing chain, the meshing chain is prevented from inclining by contacting the flat side edge of the meshing chain opposite to the side where the meshing portion is formed, and the meshing chain is inserted into the roller guide slit. It is possible to smoothly enter the rollers.

According to the second aspect of the invention, since the deflection guide portion and the storage guide portion of the chain guide are integrally formed of a single plate material, the deflection guide portion and the storage guide portion are aligned with each other. Therefore, the step of connecting and fixing can be omitted, the productivity can be improved, and the accuracy of the chain guide can be improved.

Further, according to the third aspect of the invention, in the conventional lifting device in which the housing portion of the meshing chain is formed of a drum-shaped cover case, when the meshing chain is used in double rows, the cover case is used. However, in the present invention, since a plurality of chain guides having a common structure can be used to guide a double-row knitting chain, the lifting / lowering with a large load capacity can be performed. The device has a simple structure and can be manufactured compactly.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an elevating device using a meshing chain according to the present invention.

FIG. 2 is a plan view showing an example of an elevating device using the meshing chain of the present invention.

FIG. 3 is a side view of the chain guide.

FIG. 4 is a side view showing another mode of the chain guide.

FIG. 5 is a plan view showing another embodiment of the lifting device using the meshing chain of the present invention.

FIG. 6 is a side view showing an example of a lifting device using a conventional meshing chain.

[Explanation of symbols]

1 Lifting device 2 units 3A, 3B sprockets 4A, 4B Driven shaft 5A, 5B interlocking gear 6 reducer 7 drive gear 8 motor 9A, 9B meshing chain 10 Load supporting member 11 Chain guide 12 Deflection guide section 12A, 12B arcuate guide surface 13A, 13B storage guide section 14A, 14B Roller guide slit 15A, 15B Guide edge

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B66F 3/00-7/28

Claims (3)

(57) [Claims] 1. A pair of sprockets rotatably supported with their rotation axes aligned in the front-rear direction with respect to a machine base at positions where the meshing teeth face each other with a gap therebetween, and the pair of sprockets have their meshing teeth facing each other. A drive source that rotates in both forward and reverse directions in synchronism with each other, and a roller meshes with the sprocket through the gaps from the lower outer sides of the pair of sprockets, and is bent vertically upward to bend these sprockets. Above, the meshing portions formed on the opposite sides mesh with each other and move integrally, and below the pair of sprockets, the sprockets are separated from the meshed sprockets by bending outwards on both sides. A pair of meshing chains configured so as not to bend in the opposite direction, and a load support commonly attached to the upper ends of the pair of meshing chains. On the outer peripheral side of the member and the meshing chain that meshes with the pair of sprockets, arcuate guide surfaces for guiding the respective rollers of the meshing chain are formed on both left and right sides, and are continuously formed above these arcuate guide surfaces. And a pair of vertical guide surfaces that enter between the meshing chains that mesh with each other and guide the rollers of the meshing chains, and the deflection guides are connected to the left and right sides of the deflection guides. And a plate-like chain consisting of a storage guide portion formed with roller guide slits for guiding and supporting the rollers of the chain meshing between the opposing surfaces so as to be continuously extended and retracted from the lower portions of the respective arcuate guide surfaces. The guide and the slits for guiding the rollers are provided on the front side and the rear side of the storage guide at the upper side of the entrance side, and the meshing part of the meshing chain is formed. Lifting device using the meshing chain, characterized in that a contact with the guide edge on the flat side edge opposite the. 2. An elevating device using a meshing chain according to claim 1, wherein the deflection guide portion and the storage guide portion of the chain guide are integrally formed of a single plate material. 3. A plurality of pairs of sprockets are coaxially arranged in the longitudinal direction of the machine base, and a pair of meshing chains are knitted in a double row so that the rollers mesh with the corresponding sprockets, and a chain guide. A plurality of gears are arranged in the front-rear direction of the machine base, and each is configured to guide the rollers of each row of the meshing chain. apparatus.