JP2003095578A - Cleaning mechanism for traveling crane and traveling crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning mechanism for traveling cranes, which can solve the problem of contamination occurring when using a traveling crane in clean space in a simple mechanism and a traveling crane provided with the cleaning mechanism. SOLUTION: This cleaning mechanism is used for cleaning a section near traveling wheels of the traveling crane and comprises a suction nozzle 20 arranged near the wheels, and the suction nozzle 20 has an upper face suction port 22a facing to the gap between the suction port 22a and the upper face of the wheel guide section 4 of rails, etc., and side face suction ports 22b facing to the side face of the wheel guide section 4 extended to both ends of the upper face suction port 22a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning mechanism for cleaning a region near wheels for traveling in an overhead crane such as a hoist type crane, and a traveling crane equipped with such a cleaning mechanism.

[0002]

2. Description of the Related Art Electronic material manufacturing factories, food manufacturing factories,
An overhead crane such as a hoist crane is used for moving articles in a clean space such as a clean room in various factories requiring cleanliness such as a pharmaceutical manufacturing factory. Figure 6
9 to 10 show an example of a conventional overhead crane,
Two traveling rails 4 and 4 as wheel guides are provided on the side wall surfaces 3 and 3 near the ceiling 2 of the building 1, and these traveling rails 4 and 4 are movable on these traveling rails 4 and 4. The garter 6 is bridged via the trolleys 5 and 5. Thus, the garter 6 is guided by the traveling rails 4 and 4 and is movable. The garter 6 is provided with a club 7 which is movable on the garter 6, and a crane 8 is attached to the club 7. In addition, 9 in the figure
Is a wire of the crane 8, 10 is a hook, and 11 is a wheel in the figure. Thus, the running rails 4,
The hook 10 of the crane 8 can be moved to a desired position by driving the trolleys 5 and 5 that can move on the garter 4 and the club 7 that can move on the garter 6.

[0003]

As described above, the overhead crane is indispensable for the movement of articles in the clean space. However, when the trolley or the club is moved, dust is generated by the traveling of those wheels. May occur and cause unintended contamination in the clean space.
Explaining this in detail, for example, behind the wheels traveling on the traveling rail, dust such as metal pieces and paint pieces caused by the contact between the wheels and the traveling rail is generated, and on the traveling rail ahead. Wheels crush the existing dust and generate recurrent dust as finer particle dust, and the regenerated fine dust is difficult to clean, which is a major problem in the cleaning space. For this reason, for example,
In JP-A-206585, there is proposed a device in which a suction device having a complicated mechanism is provided in the vicinity of the wheel, but the device is large and there is a problem in cost performance. Moreover, there is also a problem that dust is fined by the roll brush that is brought into contact with the traveling rail or adheres to the traveling rail, and the dust scatters again over time. Therefore, the present invention intends to provide a traveling crane cleaning mechanism that can solve the problem of contamination that occurs when the traveling crane is used in the clean space, and a traveling crane including the cleaning mechanism. Is.

[0004]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the inventors of the present invention improved the suction nozzle which is arranged near the wheels of a trolley or a club and does not come into contact with a traveling rail or the like. It was discovered that with such a configuration, dust generated near the wheels of the traveling crane can be reliably removed. That is, the suction nozzle is provided with an upper surface suction port facing the upper surface of the wheel guide part such as a rail with a gap, and side surface suction ports facing the side surfaces of the wheel guide part are provided at both ends of the upper surface suction port. By extending, a gap is formed between at least the upper side of the upper surface and the side surface of the wheel guide portion and the tip of the suction nozzle,
It was found that the air sucked through this gap is formed into a high-speed airflow, and the dust existing near the suction nozzle can be surely sucked and removed. The cleaning mechanism for a traveling crane according to the present invention is based on this finding, and is a cleaning mechanism for cleaning a region near a wheel for traveling in the traveling crane, which is arranged near the wheel, according to claim 1. The suction nozzle has an upper surface suction port facing the upper surface of the wheel guide part such as a rail with a gap, and the side surfaces of the wheel guide part are provided at both ends of the upper surface suction port. It is characterized in that it is formed by extending a side suction port facing the. The traveling crane cleaning mechanism according to claim 2 is the traveling crane cleaning mechanism according to claim 1, wherein the side surface suction port is narrower than the upper surface suction port, the lower end side is closed, and the upper side is expanded. It is characterized in that it is formed as a substantially triangular opening. The cleaning mechanism for a traveling crane according to claim 3 is the cleaning mechanism according to claim 1 or 2.
In the traveling crane cleaning mechanism described above, the nozzle is made of a tube made of a soft material such as soft polyethylene, polypropylene, or silicone rubber. A cleaning mechanism for a traveling crane according to a fourth aspect is the cleaning mechanism for a traveling crane according to any one of the first to third aspects, characterized in that the suction nozzles are arranged before and after the wheel in the traveling direction. . A traveling crane cleaning mechanism according to a fifth aspect of the present invention is the traveling crane cleaning mechanism according to any of the first to fourth aspects, wherein the wheels are trolley wheels or club wheels. Further, the traveling crane according to the present invention is, as described in claim 6, claim 1 to claim 5.
The cleaning mechanism for a traveling crane according to any one of 1 to 3 is provided.

The suction nozzle according to the present invention has an upper surface suction port which faces the upper surface of a wheel guide portion such as a rail with a gap, and both sides of the upper surface suction port are provided on the side surfaces of the wheel guide portion. By extending the facing side suction port, a gap is formed between at least the upper side of the upper surface and side surface of the wheel guide portion and the tip of the suction nozzle, and the air sucked through this gap is formed into a high-speed air stream. Since the suction is performed through the top suction port and the side suction port, it is possible to reliably suck and remove dust existing in the vicinity of the suction nozzle. In particular, when the side suction port is formed as a substantially triangular opening having a width narrower than that of the top suction port and a lower end side closed and an upper side opened, a large negative pressure is provided near the side suction ports at both ends of the top suction port. Can be formed. Therefore, it is possible to reliably prevent dust from falling from the upper surface of the traveling rail to the side surface and contaminating the clean space. When such a nozzle is composed of a tube made of a soft material such as soft polyethylene, polypropylene or silicone rubber, it is possible to easily form a nozzle having a side suction port and an upper surface opening which are formed as the substantially triangular opening.

Thus, when the suction nozzle is arranged on the front side in the traveling direction of the wheel, dust existing on the traveling rail in front of the wheel can be surely sucked and removed by the suction nozzle, and the suction nozzle can be removed. Even when it is arranged on the rear side in the traveling direction of the wheels, it is possible to reliably suck and remove the dust generated in the rear side in the traveling direction of the wheels by the contact between the traveling rail and the wheels.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 shows an example of the configuration of the cleaning mechanism of the traveling crane of the present invention, which is applied to the vicinity of the wheels 11 of the trolleys 5 and 5 moving on the traveling rails 4 and 4 which are wheel guides. is there.

Reference numeral 20 in the drawing denotes a suction nozzle which will be described later in detail,
It is arranged before and after each wheel 11 in the traveling direction, and each wheel 1 is always
The dust before and after the traveling direction of 1 can be removed by suction. Reference numeral 12 in the figure denotes a pipe connected to the suction nozzle 20, and the other end of the pipe 12 is connected to a dust collector 15 having a filter 13 and a blower 14. As the filter 13, a prefilter (coarse dust filter) made of non-woven fabric or glass fiber for collecting relatively large metal pieces or paint pieces, and fine particles of metal or the like passing through the prefilter are collected. For this purpose, a filter having a two-stage collection performance of coarse and high, which is a high-performance filter such as a HEPA filter, is used. Thus, blower 14
The suction nozzle 20 can suck and remove dust in the vicinity of the wheels 11 of the trolleys 5 by driving. The blower 14 of the dust collector 15 is driven in conjunction with the start / stop switch of the traveling crane so that it is operated only when the crane is traveling. The exhaust gas of the dust collector 15 operated in this manner is exhausted as clean air that is almost completely removed by the high performance filter,
There is no problem if it is exhausted indoors.

The suction nozzle 20 will be described in detail with reference to FIGS. 2 to 5.
Is a nozzle body 21 that is connected to the pipe 12 for communication,
The suction port 22 is made of a silicone rubber tube and is connected to the nozzle body 21. The tip of the suction port 22 is cut to be slightly wider than the width of the traveling rail 4, and the upper surface suction port 22a is formed. And side surface suction ports 22b, 22b that are continuously provided at both ends thereof, and the side surface suction ports 22b, 22b are narrower than the upper surface suction port 22a, except for the cut portion, that is, by closing both ends by fusion or the like. With respect to the width, the opening is formed as a substantially triangular shape with the lower end side closed and the upper side opened.

Thus, when the trolley 5 is driven to travel on the traveling rail 4, a gap is formed between the tip of the suction nozzle 20 and at least the upper side and the upper side of the traveling rail 4, and through this gap. The sucked air forms a high-speed air flow, and the dust existing in the vicinity of the suction nozzle 20 is surely sucked and removed. When the suction nozzle 20 is arranged on the front side of the wheel 11 in the traveling direction, Dust existing on the front traveling rail 4 is removed from the suction nozzle 20.
By this, it is possible to surely suck and remove. Even when the suction nozzle 20 is arranged on the rear side in the traveling direction of the wheel, the dust generated on the rear side in the traveling direction of the wheel 11 due to the contact between the traveling rail 4 and the wheel 11 can be reliably sucked and removed by the suction nozzle 20. . In particular, when the side surface suction port 22b is formed as a substantially triangular opening narrower than the upper surface suction port 22a and closed at the lower end side and expanded at the upper side as in the present embodiment, the side surfaces at both ends of the upper surface suction port 22a are formed. A large negative pressure is formed in the vicinity of the suction ports 22b and 22b, so that it is possible to reliably prevent dust from falling from the upper surface of the traveling rail 4 to the side surfaces and contaminating the clean space.

In this embodiment, an example of the structure of the cleaning mechanism of the traveling crane according to the present invention is applied to the vicinity of the wheels 11 of the trolleys 5 and 5, but the same cleaning can be applied to the vicinity of the wheels of the club. It goes without saying that the effect can be obtained.

When the cleaning mechanism for a traveling crane having the above-mentioned structure was applied to a traveling crane in a copper foil factory for wiring boards, metal dust or coating dust generated from the crane was found without such a cleaning mechanism. Adhesion caused dent defects on ultra-thin copper foil and product defects such as adhesion of dissimilar metals, but it is possible to reduce the incidence of such product defects to near zero. did it.

[0013]

As described above, according to the present invention, the dust generated in the vicinity of the wheels of the traveling crane can be completely sucked and removed by the suction nozzle having an extremely simple structure, and the wheels have wheel guide portions such as traveling rails. It is possible to prevent the generation of finer dust by stepping on the dust present in the vehicle, and even if it occurs, it is suctioned and removed at the same time as it occurs, and the cleanliness of the clean space where the traveling crane is installed is improved. It has the effect of being able to maintain the rating.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a cleaning mechanism for a traveling crane according to the present invention.

[Figure 2] The same front view

FIG. 3 is an enlarged cross-sectional view of the suction nozzle of the same embodiment.

FIG. 4 is a plan view of the suction nozzle.

FIG. 5 is an enlarged perspective view of the suction nozzle.

[Figure 6] Layout of a conventional overhead crane in a clean room

FIG. 7 is an enlarged perspective view of the vicinity of the trolley.

FIG. 8 is an enlarged side view near the trolley.

FIG. 9 is an enlarged front view of the vicinity of the trolley.

[Explanation of symbols]

1 building 2 ceiling 3 Side wall surface 4 Traveling rail (wheel guide part) 5 Trolley 6 Garter 7 clubs 8 cranes 9 wires 10 hooks 11 wheels 12 piping 13 filters 14 Blower 15 Dust collector 20 suction nozzle 21 Nozzle body 22 Suction port 22a Top suction port 22b Side suction port

Claims (6)

[Claims] 1. A cleaning mechanism for cleaning a region near a wheel for traveling in a traveling crane, comprising a suction nozzle arranged near the wheel, the suction nozzle being provided on an upper surface of a wheel guide portion such as a rail. On the other hand, the traveling crane has a top suction port facing with a gap, and side suction ports facing the side face of the wheel guide portion are provided at both ends of the top suction port. mechanism. 2. The side suction port is narrower than the top suction port, and is formed as a substantially triangular opening with a lower end side closed and an upper side opened. Cleaning mechanism for traveling cranes. 3. The cleaning mechanism for a traveling crane according to claim 1, wherein the nozzle is made of a soft material tube such as soft polyethylene, polypropylene, or silicone rubber. 4. The cleaning mechanism for a traveling crane according to claim 1, wherein the suction nozzles are arranged before and after the wheel in the traveling direction. 5. The cleaning mechanism for a traveling crane according to claim 1, wherein the wheels are wheels of a trolley or a club. 6. A traveling crane comprising the traveling crane cleaning mechanism according to claim 1.