JPH0913421A - Bucket chain excavator - Google Patents

Abstract

PURPOSE: To improve the work handling efficiency and to prevent damage by installing a catenary curve-like guide rail formed by split pieces on a horizontal frame of a cargo handling bucket chain for bulk cargo or the like of a hold in such a manner as to freely elevate. CONSTITUTION: A catenary curve-like guide rail 18 formed by split pieces is installed in such a manner as to be freely elevated by a cylinder 9 or the like on a horizontal frame 2 mounted on the tip of a bucket elevator column 30 in such a manner as to be freely oscillated by a vertical frame 9. In the case of ordinary cargo handling, tension is applied to a bucket chain 3 and the chain 3 is supported by both side guide sprockets 13, 14 and guided by the guide rail 18 to be turned. In the case of bottom dragging, the guide rail 18 is raised to prevent damage due to a thrust caused by the vertical movement of a ship, and the chain 3 is slackened to droop by its dead load, so that the bucket is forced to reach a ship's bottom for performing cargo handling. Further, the horizontal frame 2 can be elongated. Thus, the cargo handling efficiency can be enhanced and damage can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket chain excavator used for excavating and handling piled bulk goods.

[0002]

2. Description of the Related Art Bulk cargo etc. loaded in the hold of a carrier is unloaded by an unloader equipped with a bucket chain excavator. FIG. 9 is a side view showing a state of a conventional bucket chain excavating device used for excavating and handling such bulk cargo during normal cargo handling operation, and FIG. 10 is a bottom dredging cargo handling operation of the bucket chain excavator shown in FIG. FIG. 11 is a sectional view taken along the line XI-XI of FIG.

As shown in FIG. 9, the lower end of the bucket elevator column 30 has an upper vertical frame 1a and a lower vertical frame 1 whose upper end is connected to the lower end via a shaft 31.
An L-shaped frame is formed by a vertical frame 1 formed by b and a horizontal frame 2 connected to a lower end of the vertical frame 1 (that is, a lower end of the lower vertical frame 1b) via a shaft 32. The upper vertical frame 1a and the lower vertical frame 1b are connected by a chain tensioning means 33, and the chain vertical tensioning means 33 drives the lower vertical frame 1b to expand and contract.

A vertical frame tilting means 34 is connected between the lower end of the bucket elevator column 30 and the lower end of the upper vertical frame 1a, and the vertical frame tilting means 34 is connected between the central part of the lower vertical frame 1b and the central part of the horizontal frame 2. Horizontal frame tilting means 35 is connected between them.

The lower end of the bucket elevator column 30,
Guide sprockets 36, 37, 38 and 39 are provided at the tip ends of the shafts 31 and 32 and the horizontal frame 2, respectively, and engage with these guide sprockets 36 to 39 to circulate along the L-shaped frame. Thus, the bucket chain 3 is provided. The tension of the bucket chain 3 is increased by expanding and contracting the lower vertical frame 1b by driving the chain tensioning means 33.
Is adjusted by tightening or loosening. A large number of buckets 4 are supported by the bucket chain 3.

As shown in FIGS. 9 and 11, the guide sprockets 38, 3 are provided on both sides of the horizontal frame 2.
A linear guide rail 42 having a laterally V-shaped engaging groove in cross section is provided in accordance with the passage line of the bucket chain 3 on the lower side between 9 and the engaging groove of the guide rail 42. The bucket chain 3 is guided to the guide rail 42 by engaging with the guide roller 43 provided on the bucket mounting member 3a of the bucket chain 3.

Therefore, according to the bucket chain excavating device having the above structure, the bucket elevator column 30 (not shown)
The bucket chain 3 is circulated in the direction of arrow 44 in FIG. 9 by driving the upper drive sprocket, and the bulk load accumulated in the bucket 4 is excavated and conveyed upward to perform a cargo handling operation. At this time, when the bulk cargo is sufficiently accumulated in the hold, as shown by the solid line in FIGS. 9 and 11, the bucket chain 3 is tensioned by the drive of the chain tensioning means 33, and the guide roller 43 is guided by the guide roller 43.
The bucket chain 3 is circulated so as to move by engaging with 2, and a normal cargo handling operation is performed.

[0008] On the other hand, when the amount of the loose load remains small and the depth becomes shallow, the tension of the bucket chain 3 is relaxed by the driving of the chain tensioning means 33, as shown by the one-dot chain line in FIGS. 43 is moved downward from the guide rail 42, and the bucket chain 3 circulates between the guide sprockets 39 and 38 so as to hang depending on its own weight or the weight of the bucket 4, so that the bucket 4 contacts the bulk load only by its own weight. , Perform bottom loading operation.

In the above bucket chain excavator, however, the guide rail 42 is linear during normal cargo handling operation, whereas the bucket chain 3 is tensioned by the drive of the chain tensioning means 33, but its own weight and Since the bucket 4 tends to hang down and tilt due to the weight of the bucket 4, friction between the guide roller 43 and the lower edge of the engaging groove of the guide rail 42 causes abrasion of the lower edge.
Further, when a large excavation reaction force is applied to the bucket 4 from the bulk load in the state where the abrasion is generated, the guide roller 43 is tilted by the guide roller 43 due to the inclination of the bucket 4 due to the excavation reaction force.
This may cause the bucket 4 to be deformed or the like due to riding on the lower edge portion or biting.

Further, when the bucket tensioning means 33 is driven to relax the bucket chain 3 from the normal cargo handling operation state to convert it into the bottom cargo handling operation state, the guide roller 43 is used.
It was difficult to smoothly open the guide rail 42 from the guide rail 42, and it took a long time to convert to the bottom loading operation state. Therefore, the inventors of the present application provide a bucket chain excavating device in which a guide rail is devised in the prior application in order to solve such a problem. FIG. 12 is a side view of essential parts showing a state of the bucket chain excavating device during normal cargo handling operation, and FIG. 13 is a side view showing a state of the bucket chain excavating device shown in FIG. 12 during bottom dredge cargo handling operation, FIG.
4 is a sectional view taken along the line XIV-XIV in FIG.

In this bucket chain excavating device, as shown in FIG. 12, a guide rail 52 having a catenary curve shape is attached to the horizontal frame 2 in place of the linear guide rail 42 (see FIG. 9). Then, as shown in FIG. 14, the guide rail 52 has an upper inclined surface 52a.
An engaging surface with the guide roller 43 is formed by the vertical surface 52b continuous with the lower end of the upper inclined surface 52a. The other construction of the bucket chain excavator is the same as that of the bucket chain excavator (see FIGS. 9 to 11).

Like the above bucket chain excavator, this bucket chain excavator also tensions the bucket chain 3 and guides the guide rollers 43 during normal cargo handling operation as shown by the solid lines in FIGS. 12 and 14. While engaging with the engagement surface of the rail 52, during bottom dredging operation,
As shown by the alternate long and short dash line in FIGS. 13 and 14, the tension of the bucket chain 3 is relaxed, the guide roller 43 is released downward from the guide rail 52, and the bucket chain 3 hangs down between the guide sprockets 38 and 39 by its own weight or the like. To

During the normal cargo handling operation, the catenary curve curvature of the guide rail 52 and the sagging curvature of the bucket chain 3 due to its own weight and the like match, so that the friction between the guide roller 43 and the guide rail 52 is reduced. As a result, wear can be reduced, and it is possible to prevent the guide rail 53 from getting on and getting caught. Also, when converting from the normal cargo handling operation state to the bottom cargo handling operation state,
Since the guide roller 43 slides on the vertical surface 52b of the guide rail 52 and smoothly separates downward, the guide roller 43 can be smoothly released from the guide rail 52.

[0014]

However, in the latter bucket chain excavating device according to the above-mentioned prior art, since the guide rail 52 is curved downward in a catenary manner, it loosens during bottom loading operation. The vertical distance between the hanging bucket chain 3 and the guide rail 52 is
It will be shorter than in the case of a bucket chain excavator having a conventional linear guide rail 42. For this reason, unless the bucket chain 3 is drooped more sufficiently, the bucket 4 collides with the guide rail 52 or the like during push-up operation from the floor of the hold due to vertical movement of the ship, etc., during the bottom dredging operation. 52 and the bucket 4 will be damaged. However, when the bucket chain 3 is made to hang down more sufficiently, the drooping curvature of the bucket chain 3 becomes large, and the length of contact between the bulk load and the bucket 4 becomes too short, and the excavation efficiency of the bulk load by the bucket 4 decreases. Resulting in.

Therefore, in view of the above-mentioned conventional technique, the present invention is provided with a catenary curve-shaped guide rail and can efficiently perform excavation and cargo handling work such as bulk cargo without damaging the bucket or the like during bottom dredging cargo handling operation. An object is to provide a bucket chain excavation device.

[0016]

A first structure of the present invention that achieves the above object is to provide a bucket chain that circulates along an L-shaped or inverted T-shaped frame composed of a vertical frame and a horizontal frame, A bucket including a bucket attached to the bucket chain and a catenary-curved guide rail attached to the horizontal frame side so as to guide the bucket chain by engaging a guide roller provided on the bucket chain side. In the chain excavating device, an elevating means for elevating the guide rail is provided on the horizontal frame side.

In a second configuration, in the first configuration, the guide rail is formed by a plurality of guide rail division pieces divided in the length direction, and the elevating means is provided in each of the guide rails. It is characterized in that each of the divided pieces can be moved up and down.

According to a third structure, in the first or second structure, the engagement surface of the guide rail with the guide roller is an upper inclined surface and a vertical surface continuous with the lower end of the upper inclined surface. It consists of and.

[0019]

According to the first structure of the present invention, the guide rail has a catenary curve shape during the normal cargo handling operation, so that the guide rail and the catenary of the bucket chain coincide with each other. As a result, the guide roller smoothly engages with the guide rail. During bottom dredging operation, the bucket chain is relaxed and hangs down, and at the same time, the guide rail is raised by the elevating means, so the vertical distance between the bucket chain and the guide rail does not have to be excessively hung down. Is sufficiently secured.

Further, according to the present invention having the above-mentioned second structure, in addition to the same operation as that of the above-mentioned first structure, since the guide rail is composed of a plurality of guide rail divided pieces, these guide rail divided pieces are respectively formed. Even when the horizontal frame is a telescopic type, the guide rail can be used as a catenary for the bucket chain during normal cargo handling operation even when the horizontal frame is retracted by elevating by the elevating means. Can be matched.

Further, according to the present invention having the above-mentioned third structure, in addition to the same operation as that of the above-mentioned first or second structure, the engaging surface of the guide rail is composed of an upper inclined surface and a vertical surface. When the bucket chain is loosened when the cargo handling operation state is changed to the bottom handling operation state, the guide roller slides on the vertical surface of the guide rail and smoothly separates downward. Also, when the guide rail is composed of a plurality of guide rail divided pieces and the horizontal frame is an extendable type, the catenary curve of the guide rail and the catenary of the bucket chain are slightly different, and there is a part without the guide rail. Even
The guide roller moves smoothly along the guide rail.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

<First Embodiment><Structure> FIG. 1 is a side view showing a state of a bucket chain excavating device according to a first embodiment of the present invention during a normal cargo handling operation, and FIG. -II sectional view taken along the arrow, Fig. 2 (b) is an enlarged view of part A of Fig. 2 (a), and Fig. 3 is a side view of a main part showing a state during bottom loading and unloading operation of the bucket chain excavator shown in Fig. 1. It is a figure. In the figure, the same parts as those of the conventional one (FIGS. 9 to 14) are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, 5 is a chain tensioning means vertically provided on the outer surface of the front wall of the bucket elevator column 30, and 6 is a guide roller 7 on the bucket elevator column 30 whose upper end is connected to the chain tensioning means 5. It is a vertical frame composed of an upper vertical frame 6a which is vertically movable via a lower vertical frame 6b which is connected to a lower end portion of the upper vertical frame 6a so as to be tiltable back and forth. An integrated horizontal frame 2 is tiltably connected to the lower end of the lower vertical frame 6 via a shaft 8. The horizontal frame 2 and the vertical frame 6 form an inverted T-shaped frame. .

Reference numeral 9 denotes a lower vertical frame tilting means connected between the front surface of the central portion of the lower vertical frame 6b and the front surface of the lower end portion of the upper vertical frame 6a, and 10 denotes the rear surface of the central portion of the lower vertical frame 6b and the horizontal frame 2. It is a horizontal frame tilting means connected between the rear part and the rear part.

The bucket chain 3 comprises a guide sprocket 11 provided at the bottom of the bucket elevator column 30,
12 and guide sprockets 13 and 14 provided at the front and rear ends of the horizontal frame 2 and are circulated in the direction of arrow 15 along the inverted T-shaped frame.

As shown in FIGS. 1 and 2, the horizontal frame 2 is provided with two sets of guide rail elevating means 19 and two sets of vertical guides 16 provided in pairs on both side surfaces thereof. There is. The guide rail elevating means 19 is connected at its tip to a guide rail 18 having a catenary curve shape, and elevates and lowers the guide rail 18 by expansion and contraction thereof. The vertical guide 16 engages with the movable support frames 17 that support the guide rails 18, and guides these movable support frames 17 up and down.

As shown in FIG. 2 (b), the guide rail 18 has an upper inclined surface 18a and a vertical surface 18b continuous with the lower end of the upper inclined surface 18a as in the guide rail 52 shown in FIG. It is preferable that an engagement surface with the guide roller 43 is formed.

The vertical guide 16, the movable support frame 17, the catenary curve-shaped guide rail 18, and the guide rail lifting means 19 are not limited to the above inverted T-shaped frame type bucket chain excavator. The present invention can be similarly applied to an L-shaped frame type bucket chain excavator as shown in FIG. Further, the vertical guide 16, the movable support frame 17, and the guide rail elevating means 1
The number and arrangement of 9 are not limited to the above configuration, and may be changed appropriately.

<Operation / Effect> Therefore, according to the bucket chain excavating device of the first embodiment having the above-described structure, the guide rail 18 is driven by the guide rail elevating means 19 to move the guide sprockets 13 and 14 during the normal cargo handling operation. The bucket chain 3 is held in a continuous state with the lower peripheral edge and driven by the chain tensioning means 5 to perform the unloading operation. In this state, as shown in FIG. 2, the guide roller 43 moves while being guided by the upper inclined surface 18a and the lower vertical surface 18b of the guide rail 18, and then from the bucket 4 to the guide rail 18 via the guide roller 43. The horizontal force is received by the movable support frame, further transmitted to the horizontal frame 2 via the vertical guide 16, and supported by the horizontal frame 2.

At this time, the catenary of the bucket chain 3 and the catenary curve of the guide rail 18 substantially coincide with each other, and the guide roller 43 moves smoothly along the guide rail 18, so that the guide rail 18 and the guide roller 43.
The wear of the guide rail 18 due to the friction between the guide rail 18 and the guide roller 43, and the riding and biting of the guide roller 43 on the edge of the guide rail 18 are eliminated and do not occur.

During the bottom loading operation, as shown in FIGS. 2 and 3, the bucket chain 3 is loosened by the drive of the chain tensioning means 5 to guide the guide sprocket 1.
Between the bucket chains 3 and 14, the bucket chain 3 is hung by its own weight or the like, and at the same time, the guide rail 18 is raised to a height allowed by driving the guide rail elevating means 19. Therefore, even if the bucket chain 3 is not drooped excessively, Between the chain 3 and the guide rail 18,
It is possible to secure a sufficient vertical distance to prevent the guide rails 18 and the like from being damaged by the push-up of the bucket 4 due to the vertical movement of the ship. Therefore, since the contact length between the bucket 4 and the bulk cargo can be sufficiently lengthened for excavation, excavation and cargo handling work can be efficiently performed during bottom dredge cargo handling operation. When the bucket chain 3 is loosened, the guide roller 43 causes the vertical surface 18b of the guide rail 18 to move.
Since the vehicle smoothly slides and moves downward, it is easy to convert the normal cargo handling operation state to the bottom cargo handling operation state.

<Second Embodiment><Structure> Next, FIG. 4 is a side view of a main part of a bucket chain excavator according to a second embodiment of the present invention, and FIG. 5 is a horizontal frame of the bucket chain excavator shown in FIG. FIG. 6 is a side view of essential parts showing a state during normal cargo handling operation under reduction, FIG. 6 is a side view of essential parts showing a condition during normal cargo handling operation under horizontal frame extension of the bucket chain excavator shown in FIG. 4, and FIG. 4 is a side view of essential parts showing a state of bottom dredging operation under reduction of the horizontal frame of the bucket chain excavator shown in FIG. 4, and FIG. 8 is a bottom dredging operation under extension of the horizontal frame of the bucket chain excavator shown in FIG. It is a principal part side view which shows the state at the time.

As shown in FIG. 4, in the bucket chain excavating device according to the second embodiment, the retractable horizontal frame 20 is used.
It has. That is, the horizontal frame 20 is a hollow front horizontal frame 20a connected to the lower end of the lower vertical frame 6b.
And a rear horizontal frame 20b that slidably engages the hollow portion of the front horizontal frame 20a from the rear side, and the horizontal frame expands and contracts connected between the lower surface of the front horizontal frame 20a and the lower surface of the rear horizontal frame 20b. The rear horizontal frame 20b is expanded and contracted in the horizontal direction by the means 21.

Further, in FIG. 4, reference numeral 22 denotes a catenary-curved split type guide rail composed of a front guide rail split piece 22a and a rear guide rail split piece 22b. The front guide rail split piece 22a is supported at its front end portion via a shaft 23 at the lower front end of the front horizontal frame 20a so as to match the passage line of the bucket chain 3 (see FIG. 5) during normal cargo handling operation. It is possible to tilt up and down around 23. Further, the rear part of the front guide rail divided piece 22a and the rear guide rail divided piece 22b are connected to the front horizontal frame 20.
Three sets of vertical guides 16 '(one set for the rear part of the front guide rail divided piece 22a and two sets for the rear guide rail divided piece 22b) provided on the side surface of a and these vertical guides 1
6'is supported by a movable support frame 17 'engaged with and guided by a movable support frame 17', and its tip is connected to the rear end of the front guide rail split piece 22a and the front end of the rear guide rail split piece 22b. Set of guide rail lifting means 19a
And the tip is moved up and down by another set of guide rail elevating means 19b connected to the central portion of the rear guide rail divided piece 22a.

The guide rail divided pieces 22a, 22
b and each movable support frame 17 'are loosely pin-connected in the longitudinal direction through the elongated hole 24. Further, the rear end portion of the front guide rail divided piece 22a, the front end portion of the rear guide rail divided piece 22b, and the central portion of the rear guide rail divided piece 22b are
The guide rail elevating means 19a and 19b are tiltably connected to each other.

The engaging surface of the split type guide rail 22 with the guide roller 43 (not shown in FIGS. 4 to 8; see FIG. 2) is an upper inclined surface, like the guide rail 52 shown in FIG. It is preferably composed of a vertical surface continuing from the lower end of the upper inclined surface. In addition, the number of divisions of the split type guide rails 22 and the vertical guide 1 that supports each guide rail division piece
6 ', movable support frame 17', and guide rail lifting means 19
The number and arrangement of a and 19b are not limited to the above configuration, and may be changed as appropriate. Further, other configurations of the present bucket chain excavating device are the same as the configurations of the bucket chain excavating device shown in FIGS. 1 to 3.

<Operation / Effect> Therefore, according to the bucket chain excavating device of the second embodiment having the above-mentioned structure, during normal cargo handling operation, as shown in FIG. 5, the guide rail elevating means 19a, 19b of each set are installed. The guide rail divided pieces 22a and 22b are adjusted to the set length so as to match the catenary of the bucket chain 3 during the normal cargo handling operation, and in this state, the bucket chain 3 is circulated in the direction of arrow 15 to carry the bulk load. Excavation and unloading work. At this time, similarly to the case of the first embodiment (see FIG. 2), the guide roller 43 engages with the upper inclined surface and the vertical surface of the guide rail divided pieces 22a and 22b and moves smoothly. Therefore, the guide roller 4
The wear due to friction between the guide rail 3 and the split guide rail 22 is greatly reduced, and damage to the bucket 4 and the like is prevented.

Further, as shown in FIG. 6, when excavating a bulky material such as a wall, the rear horizontal frame 20b is extended by driving the horizontal frame expansion / contraction means 21. When the rear horizontal frame 20b is extended and the horizontal frame 20 becomes longer, the catenary of the bucket chain 3 between the guide sprockets 13 and 14 also changes, and the amount of sag of the bucket chain 3 decreases. Therefore, at this time, the horizontal frame 2
0 is extended to a predetermined length, at the same time, the guide rail elevating means 19a and 19b are extended by a set distance, and the chain tensioning means 5 is driven to drive the bucket chain 3
By adjusting the chain tension of the
It is possible to match the catenary of the bucket chain 3 according to the length of the horizontal frame 20 and the catenary curve of the split guide rail 22.

At this time, the catenary curve formed by the guide rail divided pieces 22a and 22b and the catenary of the bucket chain 3 are slightly different from each other, and between the rear end of the split type guide rail 22 and the rear guide sprocket 14. Although there is a portion where there is no guide rail, the guide roller 43 moves more smoothly along the split guide rail 22 by forming the engagement surface of the split guide rail 22 by the upper inclined surface and the vertical surface. It is sent to the rear sprocket 14.

On the other hand, during bottom dredging operation, as shown in FIGS. 7 and 8, the bucket chain 3 is slackened and hung down at the same time when the horizontal frame 20 is contracted or expanded. Guide rail lifting means 1
9a and 19b are contracted to a set length and driven to raise the guide rail divided pieces 22a and 22b of the split type guide rail 22 to lift the bucket chain 3 and the split type guide rail 2.
A sufficient vertical distance can be secured between the two and the two so as to prevent the split type guide rails 22 and the like from being damaged by the thrust of the bucket 4 due to the vertical movement of the ship. Therefore, it is not necessary to droop the bucket chain 3 excessively, and the contact length between the bucket 4 and the bulk load can be sufficiently increased to efficiently perform the excavation and cargo handling work. Further, when the bucket chain 3 is loosened, the guide roller 43 slides on the vertical surface of the split guide rail 22 and smoothly separates downward. Therefore, as in the case of the first embodiment, the bottom loading operation is carried out from the normal loading operation state. Easy to convert to state.

[0042]

According to the present invention as described in detail with reference to the embodiments, the guide rail elevating means is provided, so that the guide rail having the catenary curve shape is provided and the guide rail and the guide during the normal cargo handling operation. Prevents abrasion due to friction with the rollers and damage due to riding on the guide rollers and biting, and at the same time, the vertical distance between the bucket chain and the guide rail is sufficient without excessive hanging of the bucket chain during bottom loading operation. Therefore, it is possible to efficiently perform excavation and cargo handling work while avoiding damage to the guide rails and the like due to thrusting up of the bucket due to vertical movement of the ship.

Further, the catenary curved guide rail is formed by a plurality of guide rail divided pieces, and each of the guide rail divided pieces is moved up and down by an elevating means, whereby a long horizontal frame such as an extendable horizontal frame is formed. Whether you use a frame or a short horizontal frame, you can match the bucket chain catenary with the guide rail catenary curve,
The drilling efficiency can be improved.

Further, by forming the engagement surface of the guide rail by the upper inclined surface and the vertical surface, the guide roller moves more smoothly along the guide rail, and at the same time, from the normal cargo handling operation state to the bottom cargo handling operation state. It becomes easy to convert to.

[Brief description of the drawings]

FIG. 1 is a side view showing a state of a bucket chain excavating device according to a first embodiment of the present invention during normal cargo handling operation.

2A is a sectional view taken along the line II-II of FIG. 1, and FIG. 2B is an enlarged view of a portion A of FIG.

FIG. 3 is a side view of essential parts showing a state during bottom loading operation of the bucket chain excavating device shown in FIG. 1.

FIG. 4 is a side view of essential parts of the bucket chain excavating device according to the second embodiment of the present invention.

FIG. 5 is a side view of essential parts showing a state of the bucket chain excavating device shown in FIG. 4 during normal cargo handling operation under horizontal frame reduction.

6 is a side view of essential parts showing a state during normal cargo handling operation of the bucket chain excavating device shown in FIG. 4 under extension of a horizontal frame.

7 is a side view of essential parts showing a state during bottom dredging cargo handling operation of the bucket chain excavating device shown in FIG. 4 under horizontal frame reduction.

8 is a side view of essential parts showing a state during bottom loading operation of the bucket chain excavating device shown in FIG. 4 under horizontal frame extension.

FIG. 9 is a side view showing a state of the bucket chain excavating device according to the related art during normal cargo handling operation.

FIG. 10 is a side view of essential parts showing a state during bottom loading operation of the bucket chain excavating device shown in FIG. 9;

11 is a sectional view taken along line XI-XI in FIG.

FIG. 12 is a side view of essential parts showing a state during normal cargo handling operation of the bucket chain excavating device according to another conventional technique.

13 is a side view of essential parts showing a state during bottom loading and unloading operation of the bucket chain excavating device shown in FIG. 12.

14 is a sectional view taken along the line XIV-XIV in FIG.

[Explanation of symbols]

 2 integrated horizontal frame 3 bucket chain 4 bucket 5 chain tensioning means 6 vertical frame 6a upper vertical frame 6b lower vertical frame 7 guide roller 8 axis 9 lower vertical frame tilting means 10 horizontal frame tilting means 11, 12, 13, 14 Guide sprocket 15 Bucket chain traveling direction 16, 16 'Vertical guide 17, 17' Movable support frame 18 Guide rail 19, 19a, 19b Guide rail lifting means 20 Telescopic horizontal frame 20a Front horizontal frame 20b Rear horizontal frame 21 Horizontal frame telescopic means 22 split type guide rails 22a, 22b guide rail split piece 23 shaft 24 long hole 30 bucket elevator column 43 guide roller 52a guide rail upper inclined surface 52b guide rail vertical surface

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shigeru Kiyota 20-1 Shintomi, Futtsu-shi, Chiba Shin Nippon Steel Co., Ltd., Technology Center, Technology Development Center (72) Hisashi Suematsu 20-Futsu, Futtsu, Chiba, Japan 1 Inside Nippon Steel Co., Ltd., Technology Development Center, Equipment Technology Center

Claims (3)

[Claims] 1. A bucket chain that circulates along an L-shaped or inverted T-shaped frame composed of a vertical frame and a horizontal frame, a bucket attached to the bucket chain, and a guide provided on the bucket chain side. A bucket chain excavating device comprising a catenary-curved guide rail attached to the horizontal frame side so as to engage a roller to guide the bucket chain, wherein an elevating means for elevating the guide rail to the horizontal frame side. A bucket chain excavating device characterized by being equipped with. 2. The guide rail is formed by a plurality of guide rail divided pieces which are divided in a lengthwise direction, and the elevating means is configured to be able to raise and lower each of these guide rail divided pieces. Claim 1 characterized by the above-mentioned.
The bucket chain excavator described in. 3. The engagement surface of the guide rail with the guide roller comprises an upper inclined surface and a vertical surface continuous with the lower end of the upper inclined surface. Bucket chain drilling equipment.