JPH11335091A - Chain deflection preventing device in vertical type elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress deflection of a roller chain generated at a drive time, thus prevent generation of a metal sound due to abutting on a support, also prevent deflection of an equipment, without providing a weight in the equipment, in a vertical type elevator incapable of mounting a tensioner in the point of structure. SOLUTION: In a chain deflection preventing device used in a vertical type elevator constituted so as to up/down move a lift part along a support 2 by turning around roller chains 1A, 1B in a prescribed direction according to rotation of a sprocket 8, chain guides 9, 10 are provided in the vicinity of the upper sprocket 8 and/or lower sprocket, the chain guides 9, 10 are brought into contact with a roller of the roller chains 1A, 1B, so as to give tension by pressing the roller chains 1A, 1B in a prescribed direction. The chain guide 9 has a plane part 24 into contact with the roller of the roller chain or has a guide roller 25 abutting thereon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical elevator, and more particularly, to a chain runout preventing device in the elevator.

[0002]

2. Description of the Related Art A vertical type elevator is arranged so that a lifting portion to which a loader capable of loading a load is attached covers a column.
It has a structure that can be moved up and down along a column by a roller chain. The roller chain has both ends connected to the upper and lower ends of the elevating unit, respectively, and is bridged over a sprocket that is pivotally supported at the upper and lower ends of a column. Vertical elevators are mainly used as luggage elevators for raising and lowering luggage between the first and second floors of a building.

In general, when the distance between the shafts of the sprockets exceeds 1 m, the roller chain which is driven over the sprockets generates natural vibration or run-out due to a chordal action. It is required to provide a tensioner between the shafts.

[0004] However, in the vertical type elevator having the above-described structure, it is impossible to provide a tensioner between the shafts even though the distance between the shafts of the sprockets is extremely long. Occasionally, the roller chain fluctuated. If the roller chain runs out,
The roller chain and the support come into contact with each other to generate a metal noise, and the vibration is transmitted to the transporter, causing the transporter to oscillate and to vibrate vertically. In the past, it was the actual situation that such a problem was used.

Considering that the run-out of the roller chain is greatest when no load is loaded on the transporter, that is, when there is no load, a certain amount of weight is always provided on the back surface of the transporter and the like. Although it has been proposed to apply a certain load, it is not always possible to obtain a sufficient vibration prevention effect depending on the amount of weight, and it is necessary to design a strength to cope with an increase in weight. Causes a new problem of causing

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vertical type elevator in which a tensioner cannot be mounted due to its structure. It is an object of the present invention to prevent the occurrence of metal noise due to contact with a vehicle and to prevent the swing of a transporter.

[0007]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a support, an upper and lower sprocket attached to the upper and lower sides of the support, and a bridge extending over the upper and lower sprockets and having both ends of an elevating section. A vertical chain comprising a roller chain connected vertically and a driving source for rotating the sprocket, wherein the roller chain rotates in a predetermined direction with the rotation of the sprocket, so that the elevating unit is moved up and down along the column. In a mold elevator, a chain guide is provided near an upper sprocket and / or a lower sprocket, and the chain guide is brought into contact with a roller of a roller chain to press the roller chain in a predetermined direction to apply tension. Provided is a chain runout prevention device for a vertical elevator.

According to one aspect of the invention, the chain guide has a flat portion that contacts the rollers of the roller chain.
In this case, it is preferable that the flat portion is provided so as to be able to contact the rollers of the plurality of roller chains.

According to another aspect of the invention, the chain guide has a guide roller that contacts a roller of the roller chain. In this case, it is preferable that the guide roller has a roller diameter that is at least 2.5 times the pitch of the roller chain.

[0010] The guide roller is provided so as to come into contact with the roller of the roller chain passing outside and / or through the support.

[0011]

1 and 2 show a vertical elevator according to an embodiment of the present invention. This vertical type elevator raises and lowers the elevating unit 3 along a column 2 that stands upright from a base 4, and uses a roller chain 1 as a driving member for the elevating.

The base 4 incorporates a geared motor (not shown) as a drive source, and a lower sprocket 7 is attached to an output shaft thereof, while an upper sprocket 8 is attached to the top 5 of the column 2. . Both ends of the roller chain 1 are connected to chain mounting rods 11 and 12 fixed to the bottom and top surfaces of the elevating unit 3, respectively, and are bridged between the lower and upper sprockets 7 and 8 between these two ends. I have. The chain mounting rods 11 and 12 are provided with screws, respectively, so that the tension of the roller chain 1 can be adjusted with nuts.

The lifting unit 3 has a transporter 6 for loading luggage.
Is attached. The elevating unit 3 is supported on the column 2 so as to be able to elevate and lower as described later.

In the above configuration, when the lower sprocket 7 rotates in either direction by driving the geared motor, the roller chain 1 engaged with the sprocket is rotated.
Orbits in the same direction, and raises and lowers the lifting unit 3 and the transporter 6 along the column 2.

Referring further to FIGS. 3 to 5, the elevating section 3 has lightweight channel steels 17, 17 disposed on both front and rear sides of the column 2, and these are fastened by stay bolts 18, 19 and a connecting plate 26. It has a configuration in which it is connected at a predetermined interval, and the column 2 is arranged between them.

Large diameter rollers 13 made of a nylon material are provided at substantially diagonal positions of the elevating section 3, and a predetermined number of small diameter rollers 14, 14... Are provided at predetermined positions.
The shafts 8 and 19 are rotatably supported around the shafts.

The large-diameter rollers 13 are provided so as to be in contact with a pair of left and right side surfaces of the column 2. Small diameter roller 14,
.. Are arranged in the present embodiment, two of which are arranged so as to be able to abut on a pair of left and right side surfaces of the column 2 at positions substantially facing the large-diameter rollers 13, and the remaining four are arranged.
Two of the two small-diameter rollers are arranged so as to be able to abut on the front and rear side surfaces of the column 2 respectively. A slight gap is provided between each of the rollers and the corresponding side surface of the column 2. Here, “left and right”, “front” and “rear” are all positional relationships based on the states shown in FIGS. 1 and 3, and the same applies to the following description.

That is, the support 2 is divided into eight rollers 1
The elevating unit 3 is configured so as to be sandwiched between 3 and 14. As is apparent from FIG. 1, since the carrier 6 is attached to the right side surface of the elevating unit 3, the carrier 6 is rotated clockwise with respect to the elevating unit 3 depending on the weight of the carrier 6 and the load of the loaded luggage. The resistance to incline acts, but the large-diameter rollers 13, 13 play a role in overcoming this resistance and stably maintaining the attitude of the elevating unit 3. Small diameter roller 14, 1
4... Prevent the lateral movement of the transporter 6, and
It is provided to move up and down smoothly along.

As described above, the carrier 6 is attached to the elevating unit 3. In the present embodiment, six mounting holes 20, 20,... Formed in one of the lightweight channel steel 17 (on the right side of the column 2).
The transporter 6 is attached with bolts (not shown) using.

In addition to the geared motor, the base 4 incorporates a control panel (not shown) for controlling the vertical movement of the elevating section 3, and the elevation of the elevating section 3 is controlled by an external switch connected to the control panel. Perform operations for lowering and stopping. The vertical movement range of the lifting unit 3 is regulated by upper and lower limit switches 15 and 16 (FIG. 2). The positions of the limit switches 15 and 16 are slidable, and the stop position of the transporter 6 can be arbitrarily adjusted within the range.

Mounting brackets 21 and 21 made of angle steel are provided on both sides of the base 4, and can be fixed to the floor surface by anchor bolts (not shown).

The structure of the vertical elevator described so far is substantially the same as that of the prior art. In the vertical type elevator having such a structure, since the elevating unit 3 moves up and down along the support column 2 in a relatively long range so as to cover the support column 2, as described in the related art, the vertical movement of the roller chain 1 is performed. Shake occurs due to natural vibration and chordal action,
Tensioners to prevent this are attached to sprockets 7, 8
It is structurally impossible to arrange them in between.

Therefore, in the present embodiment, the column 2 is located just below the upper sprocket 8 provided on the top 5 of the column 2.
A flat chain guide 9 that contacts only the rollers of the roller chain 1 (1A) that passes outside the roller, and a roller-shaped chain guide that contacts only the rollers of the roller chain 1 (1B) that passes inside the support column 2. 10 are provided.

Referring to FIGS. 6 to 11, the chain guide 9 is fixed to the front surface of the column 2 with bolts 22 immediately below the upper sprocket 8, and contacts the rollers of the roller chain 1A passing outside the column 2. Plane part 24
Having. The flat portion 24 extends over a predetermined length, and comes into contact with the rollers of the plurality of links of the roller chain 1A (see FIG. 8), and forcibly presses the roller chain 1A in the direction of the arrow (FIG. 6). To give tension.

The chain guide 10 is fixed to the left side surface of the column 2 with bolts 23 immediately below the upper sprocket 8, and a guide roller 25 protruding into the column 2 and rotatably provided passes through the inside of the column. Chain 1
It is configured to contact the roller B. The guide roller 25 has a pitch of 2.5 to the pitch of the roller chain 1B.
It has a roller diameter twice or more, and makes contact with the roller of the roller chain 1B to forcibly press it in the direction of the arrow (FIG. 6) to apply tension.

Here, the reason why the roller diameter of the guide roller 25 is set to 2.5 times or more the pitch of the roller chain 1B will be described with reference to FIG.
When the guide roller 25 having a roller diameter 2.5 times or more the pitch P of B is used, the center movement amount of the roller chain 1B is set to L2, and a guide having a roller diameter less than 2.5 times the roller pitch P is used. Assuming that the center movement amount when the roller 25 'is used is L1, L2 <L1 is always satisfied. A large center movement amount of the roller chain 1B means that the deflection of the rollers 27 of the roller chain when the rollers 27 and 27 contact the guide rollers is large. Therefore, the center movement amount of the roller chain 1B is as small as possible. Preferably, it is 1 mm or less.
As a result of repeated experiments from this viewpoint, it has been proved that the guide roller 25 preferably has a roller diameter of 2.5 times or more the pitch of the roller chain 1B.

The flat portion 24 of the chain guide 9 which comes into contact with the rollers of the roller chains 1A and 1B and the outer peripheral portion of the roller 25 of the chain guide 10 are both heat-treated, and are worn due to the contact of the roller chains 1A and 1B with the rollers. Has been prevented.

According to the embodiment of the present invention described above,
Even in vertical elevators where it is impossible to place a tensioner in the middle of two sprockets with a long center-to-center distance,
Chain guides 9 and 10 are provided immediately below the upper limit sprocket 8, and these roller guides 1A pass through the outside of the support 2 and the roller chains 1B pass through the inside of the support 2
The roller chain can be tensioned by being brought into contact with the roller and pressed in a predetermined direction, so that the roller chain can be prevented from swaying during driving.

In the illustrated embodiment, the chain guide 9 is used.
Is configured to contact the roller of the roller chain 1A at the flat portion 24, and the chain guide 10 is configured to contact the roller of the roller chain 1B at the guide roller 25, but this is not limiting. Roller chain 1 with chain guide 9 using guide rollers (25)
The configuration may be such that the chain guide 10 is brought into contact with the roller of the roller chain 1B at the flat portion (24) by contacting the roller A. Further, the chain guides 9 and 10 may be configured to be brought into contact with the rollers of the roller chains 1A and 1B by the flat portion (24) or the guide roller (25).

In the illustrated embodiment, the chain guides 9 and 10 are provided directly below the upper sprocket. However, the same applies if the chain guides 9 and 10 are provided directly above the lower sprocket instead of or in combination with this. The effect is obtained. That is, in the present invention, a chain guide is provided near one or both of the upper sprocket and the lower sprocket, and the roller guide 1A passes through the chain guide outside the support 2 and the roller chain passes through the inside of the support 2 The tension is applied to the roller chain by bringing the roller chain into contact with the roller 1B and pressing the roller chain in a predetermined direction.

The pressing direction of the roller guides 1A and 1B by the chain guides 9 and 10 is not limited to the illustrated embodiment. On the contrary, both may be pressed to the left. Alternatively, the tension may be applied by pressing in a direction approaching or away from each other.

Further, although the illustrated embodiment is a vertical elevator in which the roller chain 1 is hung in an S-shape, the present invention can be applied to a so-called endless hanging vertical elevator as shown in FIG. Needless to say.

[0033]

According to the present invention, in a vertical elevator in which a tensioner cannot be attached due to its structure, a chain guide is provided immediately below an upper sprocket to contact a roller of a roller chain, and thereby the roller chain is moved in a predetermined direction. Since the tension can be applied to the roller chain by pressing, it is possible to suppress the deflection of the roller chain which occurs at the time of driving, and thus it is possible to prevent the generation of metal noise due to the contact with the support and the deflection of the transporter.

[Brief description of the drawings]

FIG. 1 is a side view of a vertical elevator according to an embodiment of the present invention.

FIG. 2 is a front view of the vertical elevator according to the embodiment.

FIG. 3 is a side view showing details of an elevating unit in the vertical elevator according to the embodiment.

FIG. 4 is a front view of a lifting unit.

FIG. 5 is a view taken in the direction of arrows AA in FIG. 3;

FIG. 6 is a side view showing details of a portion related to a chain guide in the vertical elevator of the embodiment.

FIG. 7 is a front view showing the details of the same parts as in FIG. 6;

FIG. 8 is an enlarged side view showing a chain guide having a flat portion together with a roller chain.

FIG. 9 is an enlarged front view similar to FIG. 8;

FIG. 10 is an enlarged side view showing a chain guide having a guide roller together with a roller chain.

FIG. 11 is an enlarged front view similar to FIG. 10;

FIG. 12 is a diagram similar to FIG. 10, illustrating the relationship between the roller diameter of the guide roller and the center movement amount of the roller chain.

FIG. 13 is a side view showing an embodiment in which the present invention is applied to an endless hanging type vertical elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A, 1B Roller chain 2 Post 3 Elevating part 4 Base 5 Post top 6 Carrier 7 Lower sprocket 8 Upper sprocket 9, 10 Chain guide 11, 12 Chain mounting rod 13 Large diameter roller 14 Small diameter roller 15 Upper limit switch 16 Lower limit Limit switch 17 Lightweight channel steel 18, 19 Stay bolt 20 Mounting hole 21 Mounting bracket 22, 23 Bolt 24 Flat part of chain guide 9 25 Guide roller of chain guide 10 26 Connecting plate 27 Roller of roller chain

[Procedure amendment]

[Submission date] July 28, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction contents]

Here, the reason why the roller diameter of the guide roller 25 is set to 2.5 times or more the pitch of the roller chain 1B will be described with reference to FIG.
When the guide roller 25 having a roller diameter 2.5 times or more the pitch P of B is used, the center movement amount of the roller chain 1B is L1, and a guide having a roller diameter less than 2.5 times the roller pitch P is used. Assuming that the center movement amount when the roller 25 'is used is L2 , L1 <L2 is always satisfied . A large center movement amount of the roller chain 1B means that the deflection of the rollers 27 of the roller chain when the rollers 27 and 27 contact the guide rollers is large. Therefore, the center movement amount of the roller chain 1B is as small as possible. Preferably, it is 1 mm or less.
As a result of repeated experiments from this viewpoint, it has been proved that the guide roller 25 preferably has a roller diameter of 2.5 times or more the pitch of the roller chain 1B.

Claims (8)

[Claims] 1. A strut, upper and lower sprockets mounted above and below the strut, a roller chain spanned over the upper and lower sprockets, and both ends of which are connected above and below an elevating portion, and a drive for rotating the sprocket. A vertical lift having a source and a roller chain orbiting in a predetermined direction as the sprocket rotates to raise and lower the elevating unit along the column. A chain run-out preventing device for a vertical type elevator, wherein a guide is provided, and the roller guide is pressed in a predetermined direction to apply tension by bringing the chain guide into contact with a roller of the roller chain. 2. The chain run-out prevention device according to claim 1, wherein the chain guide has a flat portion that contacts the rollers of the roller chain. 3. The chain runout prevention device according to claim 2, wherein the flat portion is provided so as to be able to contact the rollers of the plurality of roller chains. 4. The chain runout prevention device according to claim 1, wherein the chain guide has a guide roller that comes into contact with a roller of the roller chain. 5. The apparatus according to claim 4, wherein the guide roller has a roller diameter that is at least 2.5 times the pitch of the roller chain. 6. The chain run-out preventing device according to claim 1, wherein the guide roller is provided so as to come into contact with a roller of a roller chain passing outside the support. 7. The chain runout prevention device according to claim 1, wherein the guide roller is provided so as to be in contact with a roller of a roller chain passing inside the support. 8. A method according to claim 1, wherein a first guide roller is provided for contacting a roller of a roller chain passing outside the support, and a second guide roller is provided for contacting a roller of the roller chain passing inside the support. The chain runout prevention device according to any one of claims 1 to 5, wherein