JP3466828B2 - Worker transfer device in continuous unloader - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a worker transfer device in a continuous unloader.

A continuous unloader is a loading and unloading machine for landing bulk materials such as coal and ore in a ship's hold. The bulk material is scraped mainly by driving the scraping part of the unloader. When the layer thickness becomes thin, a bulldozer is carried into the boat hold, and the bulldozer is used to scrape the loose items and the manual work is used to scrape loose items attached to the boat hold wall. Although a worker often goes down to the bottom of the ship for various kinds of bottom works, inspection of the unloader, and the like, the present invention relates to a worker transfer device used when getting to the bottom of the ship.

[0003]

2. Description of the Related Art A conventional continuous unloader will be described with reference to FIG. In the figure, 1 is a traveling frame, 2 is a swivel base, 3 is a boom that can be raised and lowered, 4 is a vertical transport unit for vertically transporting loose objects, and 5 is a scraping unit. The loose material in the boat hold is scraped off by the scraping unit 5, transported upward by the vertical transport unit 4, and sent to the swivel base 2 by the conveyor in the boom 3.
From there, it is sent to the conveyor C on the quay via the conveyor and chute attached to the traveling frame 1. On the other hand, the continuous unloader UL is equipped with operating personnel and various workers who work on and inspect the stairs 6 provided on the traveling frame 1, the stairs 7 on the swivel base 2, and the sidewalks inside the boom 3. 8. Go back and forth using the stairs 9 and the landing 15 provided in the vertical transport unit 4.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In UL, a worker can go to the landing 15 provided in the vertical carrying section 4, but cannot proceed from there to get to the bottom of the ship. Therefore, in order for the worker on the unloader UL to get down to the bottom of the ship, he had to go down to the quay through the boom inner sidewalk 8 and the stairs 7 and 6, and then board the ship S to get to the bottom of the ship. However, to get off at the bottom of the ship, we used stairs, etc. installed on each hold wall of the ship's barge. In particular, since the stairs are buried in the loose material, the worker is getting off while removing the loose material with a scoop. Therefore, it was very time consuming and inefficient. Also, if a worker falls from the middle of the stairs, the loose material remains only on the bottom of the ship, and the drop is large, which is very dangerous.

In view of such circumstances, it is an object of the present invention to provide a worker transfer device which can easily transfer directly from the unloader to the ship bottom in a short time and is safe.

[0006]

A transfer device according to claim 1 is
In the vertical transfer section of the continuous unloader, a fixed walking means composed of a ladder and a landing provided from the upper part to the lower part of the vertical transfer section, and a guide frame provided adjacent to the fixed walking means are guided. And a lifting / lowering means provided with a lifting / lowering ladder for lifting / lowering the upper and lower ends of the vertical transporting section, and a lower end of the lifting / lowering ladder is lowered to a lower position than the lower end of the vertical transporting section, and a lower end of the vertical transporting section. It is characterized in that it moves up and down between the up and down positions. In the invention of claim 1, any guide means can be adopted for guiding the lifting and lowering of the elevator ladder. In particular, in the transfer device of claim 2, the guide means for guiding the lift and lower of the elevator ladder is A guide rail that is provided on each of the two side frames and has two inclined surfaces, that is, a front-side inclined surface that is inclined toward the front side with respect to the horizontal axis of the ladder and a back-side inclined surface that is inclined toward the rear side with respect to the horizontal axis of the ladder. A front side guide roller which is provided on the left and right sides of the upper and lower ends of the guide frame and which rolls in contact with the front side inclined surface, and a back surface which rolls in contact with the back side inclined surface. It is characterized by comprising a guide roller unit including a side guide roller. In the invention of claim 1 or 2, the means for raising and lowering the elevating ladder is arbitrary, but in particular, the transfer device of the third aspect is characterized in that the elevating ladder is suspended from a remotely operable winding means. And According to a fourth aspect of the present invention, in the transfer apparatus according to the first or second aspect of the present invention, an upper limit position detector that detects an upper limit position for raising the elevator ladder is provided between the outer frame and the elevator ladder. Claim 5
In the invention of claim 1 or 2, the transfer device comprises a plurality of semi-ring-shaped horizontal frames having a size that allows a person to pass through on the front surface side of the elevating ladder, and a vertical frame connecting the plurality of horizontal frames. A feature is that a protective frame is provided.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a worker transfer apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of the worker transfer apparatus.

In the figure, the vertical transport section 4 comprises an elevator casing 4A and a swing frame 4B below the elevator casing 4A. The swing frame 4B includes a swing casing 10, a rear link 11, a front link 12, and an excavation frame.
It is composed of 13 and a cylinder 14. Back link
Both ends of 11 and the front link 12 and the upper rear end of the swing casing 10 are pin-connected, and when the cylinder 14 is expanded and contracted, the swing frame 4B swings.

The landing 15 is provided at the lower end of the elevator casing 4A, the swing casing 10 therebelow is provided with a vertical fixed ladder 16, and a landing 17 is provided near the lower end of the fixed ladder 16. ing.

The worker transfer device A of the present embodiment is provided adjacent to the fixed ladder 16 and the landing 17, and the worker transfer device A is composed of a fixed walking means 20 and a lifting transfer means 30. ing.

The fixed walking means 20 is composed of a fixed ladder 21 provided at a position where it can be transferred from the landing 17, and a landing 22 provided near the lower end thereof. In addition, fixed ladder
Instead of 21, stairs or steps may be used. The “fixed walking means” referred to in the claims is a means by which a worker can move, and is a concept including all means fixed to the vertical transport unit 4. The elevating / transferring means 30 is provided at a position where the user can transfer from the landing 22. The elevating / transferring means 30 is mainly composed of a mounting frame 31, an elevating ladder 34 and a winch 38, which will be described in detail below.

FIG. 3 is a front view of the elevating / transferring means 30, FIG. 4 is a lateral enlarged cross-sectional view of the elevating / transferring means 30 taken along the line IV-IV in FIG. 3, and FIG. . 3-4
In, the mounting frame 31 is composed of a mounting frame 32 and a guide frame 33. The mounting frame 32 is a mounting member mounted on the swing frame 10, and is integrally formed with the guide frame.
33 is fixed. The guide frame 33 is a pair of left and right elongated frame bodies, and guide roller units 42 to be described later are attached to the left and right sides of the upper and lower ends of the guide frame 33, respectively.

Reference numeral 34 designates a lifting ladder, which has left and right side frames 35,
It is composed of a large number of horizontal bars 36 spanned between them. A suspension ring 37 is attached to the upper end of the elevating ladder 34, and is connected to a winch 38 by a wire rope 39.

As shown in FIGS. 1 and 10, the winch 38 is mounted at a proper position on the swing frame 4B,
It is possible to operate from remote control means such as wireless or the cab of the unloader UL. Therefore, by hoisting and lowering the winch 38, the elevating ladder 34 can be freely moved up and down.

Next, the guide means 40 provided between the mounting frame 31 and the elevating ladder 34 will be described with reference to FIGS. First, guide rails 41 are attached to the outer surfaces of the left and right side frames 35 of the elevating ladder 34 along the longitudinal direction. The guide rail 41 is made of, for example, an angle member and is attached with the outer surface facing outward. Therefore, the front side inclined surface 41a inclined to the front side at an angle of 45 ° with respect to the horizontal axis of the ladder, that is, the center line 36a of the horizontal bar 36.
Similarly, the back side inclined surface inclined to the back side at an angle of 45 °
It has 41b.

On the other hand, as shown in FIG. 3, the guide frame 33
Guide roller units 42 are provided on the left and right of each of the upper and lower ends, and each guide roller unit 42 is configured as shown in FIG. That is, the roller 45a is mounted via the bearings 44, 44 attached to the guide bracket 43.
, 45b are rotatably supported and each roller 45a, 4b
The axis of 5b intersects at 90 ° and at the angle of 45 ° the centerline 3
It is inclined to 6a. Therefore, each roller 45a, 4
The roller surface of 5b is the inclined surface 4 of the guide rail 41.
It will roll by touching 1a and 41b.

With this construction, the elevating ladder 34 can be smoothly moved up and down, and can be held vertically without falling forward, backward, left or right. Therefore, when a worker goes up and down the elevating ladder 34, there is an advantage that the ladder is stable and the safety is high.

3 and 4, reference numeral 46 is a limit switch, and 47 is a striker, which constitute an upper limit position detector for detecting the upper limit position for raising the elevator ladder 34. As described above, when the winch 38 is wound up and the elevating ladder 34 is raised to the upper limit position, the striker 47 actuates the limit switch 46 to stop the driving of the winch 38. By setting this upper limit position such that the lower end of the elevating ladder 34 is above the lower end of the scraping section 5, the elevating ladder 34 will not be an obstacle during the scraping work. Further, it is possible to prevent the lifting ladder 34 from rising excessively. Furthermore, the upper limit position of the elevator ladder 34 can be displayed in the cab by the signal from the limit switch 46, and the cargo handling work can be safely started.

Next, an embodiment in which the lifting / lowering transfer means 30 is provided with a protective frame and the like will be described. FIG. 6 is a front view of the elevating / transferring means 30 to which the protective frame 50 and the safety fence 53 are attached, FIG. 7 is a side view of the same, and FIG.
Is a plan view of the protective frame 50, and FIG. 9 is a plan view of the safety fence 53.

6 to 8, reference numeral 50 denotes a protective frame which is attached to both side frames 35 of the elevating ladder 34. This protective frame 50
Is a plurality of half-ring-shaped horizontal frames 51 that are large enough for a person to pass through,
The vertical frame 52 connects the plurality of horizontal frames 51. This protective frame 50 moves up and down together with the lifting ladder 34, and
Since 51 can be held by a person, it is very effective in preventing workers from falling.

In FIGS. 6 to 7 and 9, reference numeral 53 designates a landing.
It is a safety fence 53 when people transfer from 22 to the lifting ladder 34,
A fence 54 attached to the landing 22 side and a fence 55 attached to the outer frame 31 side of the lifting / lowering transfer means 30 are formed into a substantially ring shape as a whole.

Due to the presence of this safety fence 53, the landing 22
Safety is ensured when transferring from the elevator to the elevator ladder 34. The inner diameter of the safety fence 53 is larger than the outer diameter of the protection frame 50 so as not to prevent the lifting ladder 34 from rising.

FIG. 10 shows a state in which the elevating ladder 34 of this embodiment is lowered, and in this state, the upper end of the elevating ladder 34 is adjacent to the fixed ladder 21 and the landing 22, and from the landing 22 to the elevating ladder 34. Since the lower end of the lifting ladder 34 is below the lower end of the scraping unit 5, it is easy for a worker to get down to the bottom of the ship along the lifting ladder 34. Further, it is easy to transfer from the boat to the elevator ladder 34, and further, through the fixed ladder 21 and the fixed ladder above it, it is possible to freely come and go to the cab of the unloader UL and to the quay.

When workers do not get in and out of the elevator ladder
If 34 is pulled up as shown by the solid line in FIG. 1, the lower end of the elevating ladder 34 is above the lower end of the scraping section 5, so that the scraping work is not hindered.

The operation of the elevating ladder 34 may be performed by a worker at the bottom of the ship using a wireless device or the like to contact the driver in the cab of the unloader UL, and the operator directly operates the wireless control device. Etc.

In the above embodiment, the swing frame 4B is used.
However, it is also applicable to an unloader in which the scraping unit 5 does not swing. In that case, if the fixed ladder 21, the landing 22, and the lifting / transferring means 30 are mounted on a fixed frame, Good.

[0027]

According to the first aspect of the invention, since the lower end of the elevating ladder lowers below the lower end of the vertical transfer section, the operator can use the elevating ladder to get to the bottom of the ship or return from the bottom to the unloader. It can come in easily and quickly, and accidents such as falling are less likely to occur. According to the invention of claim 2, since the guide rail and the guide roller guide, the elevating ladder moves up and down smoothly, and furthermore, the two inclined surfaces of the guide rail inclined toward the front surface side and the rear surface side contact the guide roller. , It is safe because the elevator ladder does not fall forward, backward, left or right. According to the invention of claim 3, since the hoisting means can be remotely operated, the worker can operate it by himself.
Greater freedom of operation. According to the invention of claim 4, since it is possible to surely store the elevating ladder in the upper position so that the lower end of the elevating ladder does not come out below the lower end of the scraping portion, it may interfere with the scraping work. Absent. According to the fifth aspect of the present invention, the protection frame prevents the personnel from falling from the elevating ladder, and thus the safety is enhanced.

[Brief description of drawings]

FIG. 1 is a worker transfer device A according to an embodiment of the present invention.
FIG.

FIG. 2 is a worker transfer device A according to an embodiment of the present invention.
FIG.

FIG. 3 is a front view of a lifting / lowering transfer unit 30.

FIG. 4 is a laterally enlarged cross-sectional view of the lifting / lowering transfer means 30 taken along the line IV-IV in FIG.

FIG. 5 is an enlarged view of a main part of guide means 40.

[Fig. 6] Elevating / transferring means 30 equipped with a protective frame 50 and a safety fence 53
FIG.

[Fig. 7] Elevating / transferring means 30 equipped with a protective frame 50 and a safety fence 53
FIG.

FIG. 8 is a plan view of a protection frame 50.

FIG. 9 is a plan view of a safety fence 53.

FIG. 10 is an explanatory diagram showing a state in which the lifting ladder is lowered in the worker transfer apparatus A according to the present embodiment.

FIG. 11 is a side view of a conventional continuous unloader.

[Explanation of symbols]

4 Vertical transport section 5 scraping part 10 swing casing 20 Fixed walking means 21 fixed ladder 30 Lifting and transferring means 31 mounting frame 34 Lift ladder 40 Guide means 41 Guide rail 42 Guide roller unit 50 protection frame 53 safety fence

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikio Watanabe 3 Hikari 3 Oshima, Kashima City, Ibaraki Prefecture Sumitomo Metal Industries, Ltd. Kashima Steel Works (56) Reference JP-A-7-267379 (JP, A) JP HEI 3-124606 (JP, A) JP-A-63-27337 (JP, A) Actually open 57-138797 (JP, U) Actually open flat 7-24697 (JP, U) Actually open 62-131598 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B65G 67/60

Claims (5)

(57) [Claims] 1. A vertical transfer section of a continuous unloader,
Elevating with a fixed walking means composed of a ladder and a landing provided from the upper part to the lower part of the vertical transport section, and an elevating ladder provided adjacent to the fixed walking means to move up and down guided by a guide frame. And a lower end portion of the elevating ladder, which is composed of transfer means, elevates and lowers between a lowering position in which the lower end of the elevating ladder descends from a lower end of the vertical transfer unit and an elevating position in which the lower end of the vertical transfer unit is lifted up. A worker transfer device in a continuous unloader. 2. A guide means for guiding the raising and lowering of the elevating ladder is provided on each side frame of the elevating ladder and is inclined toward the surface side with respect to the lateral axis of the ladder, and the lateral axis of the ladder. On the other hand, the guide rail having two inclined surfaces, the inclined surface on the rear surface side and the inclined surface on the rear surface side, and the upper and lower end portions of the guide frame, which are provided on the left and right respectively, come into contact with the inclined surfaces on the front surface side and roll. A moving front guide roller,
The worker transfer device in the continuous unloader according to claim 1, further comprising a guide roller unit including a back side guide roller that rolls in contact with the back side inclined surface. 3. The lifting ladder is suspended from a remotely operable winding means.
Alternatively, the worker transfer device in the continuous unloader described in 2. 4. An operator in a continuous unloader according to claim 1, wherein an upper limit position detector for detecting an upper limit position for raising the elevator ladder is provided between the guide frame and the elevator ladder. Transfer device. 5. A protective frame is provided on the surface side of the elevating ladder, which comprises a plurality of semi-circular horizontal frames of a size that allows a person to pass through, and a vertical frame connecting the plurality of horizontal frames. The worker transfer device in the continuous unloader according to claim 1 or 2.