JPH08104494A - Diagonally traveling crane - Google Patents

Abstract

PURPOSE: To provide a diagonally traveling crane capable of preventing any serious accident by stopping a truck on which a crane main body is loaded in the position in case of emergency. CONSTITUTION: A diagonally traveling crane is provided with a truck 14 provided with wheels on both sides of the bottom part, and to travel on an inclined surface 11, a crane main body 15 loaded on the truck 14, and a winch 23 for raising and lowering the truck 14 along the inclined surface 11 while pulling a wire rope 54 to be wound. A pin rack 20 wherein a plurality of pins 20 are parallely provided is provided on the inclined surface 11 along the traveling line of the truck 14, and the base end of a running-out preventing member 13 wherein a hooking part 50 to be hooked on the pin 20 in the emergency is provided on the bottom surface is rotatably attached to the truck 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oblique crane used in the construction of dams and the like.

[0002]

2. Description of the Related Art In the case of constructing a dam or the like, materials such as a reinforcing bar and a formwork, which usually have an inclined surface and are used for constructing a dam, are conveyed to a position below the inclined surface and run on the inclined surface. It will be carried out more efficiently if the truck is used to convey the material to the required position, the crane main body is mounted on the truck, and the material is conveyed by the crane. For driving the trolley, the winch is usually arranged at the upper position of the inclined surface,
It is generally practiced to attach a part of a wire rope that is wound and driven by the winch to the trolley so that the inclined surface is slanted.

[0003]

However, if the wire rope is repeatedly used, the wire rope may be broken, and in such a case, the trolley may run out of control, resulting in a serious accident. Therefore, a shock absorber or the like is generally arranged at the lower end of the inclined surface, but it is not sufficient because it cannot flexibly receive the energy of runaway. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an oblique traveling crane capable of preventing a serious accident by stopping a truck equipped with a crane body at that position in an emergency. .

[0004]

A method according to the above-mentioned object.
The oblique traveling crane described above includes a trolley having wheels on both sides of the bottom and traveling obliquely on an inclined plane, a crane main body mounted on the trolley, and a trolley along the inclined plane while pulling a wire rope to be wound. Of a escape prevention member having a winch for moving up and down, and providing a pin rack in which a plurality of pins are juxtaposed on the inclined surface along the traveling line of the trolley, and having a hooking portion on the bottom surface for catching the pin in an emergency. In the oblique traveling crane, the base end portion of which is rotatably attached to the trolley, and the escape prevention member is partly placed on the stretched wire rope and disengaged from the pin during normal oblique traveling. In a state, in an emergency, the pin is pivoted by its own weight to be engaged with the engaging portion of the pin, and in an emergency, a pressing drive means is provided for holding the engaging state of the engaging portion. The oblique traveling crane according to a second aspect is the oblique traveling crane according to the first aspect, wherein the pressing drive means is a hydraulic cylinder and is driven by detecting a break of the wire rope. The oblique crane according to claim 3 is the same as in claim 1.
Alternatively, in the oblique traveling crane according to 2, the plurality of hook portions are provided at intervals sufficiently shorter than the pitch of the pins. And, the oblique traveling crane according to claim 4 is the same as that according to claim 1.
In the oblique traveling crane according to any one of items 1 to 3, the escape prevention member is connected to the trolley via a shock absorbing member.

[0005]

In the oblique traveling crane according to claims 1 to 4,
A pin rack having a plurality of pins is provided on the inclined surface along the traveling line of the carriage, and a escape prevention member having a bottom surface with a hooking portion that catches on the pins in an emergency is provided on the carriage, and when the vehicle is skewed normally, the escape prevention member is provided. Since a part of the wire rope is placed on the wire rope stretched for pulling up the wire rope and is out of the pin, the cart can be slanted on the inclined surface without any trouble. Then, in an emergency, the pin is pivoted by its own weight and the hooking portion is engaged with the pin, so that the carriage can immediately stop.
At this time, even if the escape prevention member bounces,
Since the pressing drive means for holding the hooked state of the hooking portion is provided, the hooking portion can be reliably locked to the pin. During normal work, it is preferable to hang the hooking portion on a pin and further press the escape prevention member by the pressing drive means. Particularly, in the oblique traveling crane according to claim 2, since the pressing drive means is composed of a hydraulic cylinder and is driven by detecting that the wire rope is broken, the operation is reliable. , It is safe because the latching part can be securely engaged with the pin. In the oblique traveling crane according to claim 3, since the plurality of hook portions are provided at intervals sufficiently shorter than the pitch of the pins, even if the cart is dropped and rotated to a position where the hook portions are disengaged, When the vehicle travels a little, the pin immediately engages with the adjacent hooking portion, thereby shortening the drop distance in an emergency and reducing the overall impact of the carriage. Further, in the oblique traveling crane according to claim 4, since the escape prevention member is connected to the trolley via a shock absorbing member, acceleration generated by traveling to the position of the pin with which the locking portion engages The load is received by the shock absorbing member, whereby the shock load applied to the escape prevention member and the pin can be relieved.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 (A) and 1 (B) are an overall layout view of the oblique traveling crane, FIGS. 2 (A) and 2 (B) are plan and front views of the oblique traveling crane, respectively, and FIG. 3 is an arrow view in FIG. A-A diagram,
4 is a view taken along the line BB in FIG. 2, FIG. 5 (A) is a partially omitted plan view of the pin rack installed on the inclined surface, and FIG. 5 (B).
3 is a view taken along the line CC in FIG. 3, FIG. 6 is a partial front view around the escape prevention member, FIG. 7 is a partial plan view around the escape prevention member,
FIG. 8 is a partial side view around the escape prevention member, and FIG. 9 is an explanatory view of a mounted state of the pin rack.

As shown in FIGS. 1 and 2, an oblique traveling crane 10 according to an embodiment of the present invention travels along a pin rack 12 arranged on an inclined surface 11, and a escape prevention member 13 is provided at a lower portion thereof. It has a trolley 14 provided and a crane body 15 mounted on the trolley 14. These will be described in detail below.

Concrete is cast on the surface of the inclined surface 11 to form a flat surface, and a pin rack 12 is provided at the traveling position of the crane. This pin rack 12
As shown in FIGS. 5 and 9, a plurality of guide rails 17 and 18 made of H-shaped steel, which are arranged in parallel and whose lower portions are fixed by anchor bolts 16, and a plurality of them are connected at a predetermined pitch via an auxiliary plate 19. It consists of pins 20. The crane body 15 is composed of a well-known jib crane having a boom 21 that rotates and rotates.

As shown in FIGS. 3 and 4, the trolley 14 has a bottom portion inclined along the inclined surface 11, and rubber wheels 22 around which a pair of urethane rubbers are provided on both sides are provided. A winch 23 provided on the top of the inclined surface 11 pulls the concrete so that the inclined surface 11 is slanted on the concrete. Then, as shown in FIGS. 5 (B) and 9, vertical wheels 24 abutting both sides of the guide rails 17 and 18 and upper portions outside the guide rails 17 and 18 are provided at the center of the front and rear of the carriage 14. Lateral wheels 25 that come into contact with the collar from the inside are attached by support members 26 and 27, respectively, so that the carriage 14 can move along the pin rack 12 including the guide rails 17 and 18.

As shown in FIGS. 4, 6 and 7, a mounting member 29 is provided at the center of the bottom of the trolley 14 via a shock absorbing member 28, and the mounting member 29 is provided with the escape prevention member 13 as a horizontal pin. It is rotatably attached via 31. The shock absorbing member 28 is made of a commercially available hard rubber with a mounting seat and is arranged between a face plate 32 fixed to the dolly 14 side and a face plate 33 fixed to the mounting bracket 29 side. The escape prevention member 13 is shown in FIGS.
As shown in FIG. 3, a connecting metal fitting 34, one of which is rotatably attached to the horizontal pin 31 of the mounting metal fitting 29, and both sleeve portions 35.
A main body frame 37 having an end portion attached to the other end of the connecting fitting 34 through a vertical pin 36, and a wire sheave 38 rotatably attached to the center of the main body frame 37.
And wire guide rollers 39 and 40 attached to both lower sides of both sleeve portions 35 of the main body frame 37, and the both sleeve portions 35.
A pair of guide plates 42 attached to the upper part of the plate and a pin 44 fitted into a longitudinal hole 43 formed in the pair of guide plates 42 in the longitudinal direction are an example of a press drive means provided at the tip. And a cylinder 45.

The body frame 37 includes two vertical plates 46,
47 and upper and lower horizontal plates 48 and 49 provided from the base end portion to the middle portion, and saw-like hooking portions 50 are provided on the front side bottom portions of the vertical plates 46 and 47. . The hook 50 has a slope 51 on the front side and a right-angled surface 52 on the base side.
The right-angled surface 52 engages with the horizontally arranged lower pin 20, and the inclined surface 51 does not engage. The horizontal plate 48,
A fixed shaft 53 is provided at the center of 49, and the wire sheave 38 is rotatably provided on the fixed shaft 53.

Therefore, the operation of the escape prevention member 13 is
When the wire sheave 38 is pulled by the wire rope 54 in a normal state, the main body frame 37 faces diagonally upward along the wire rope 54, the hook 50 is disengaged from the pin 20, and the carriage 14 can freely move up and down. . If the wire rope 54 breaks, the tension of the wire rope 54 disappears, the pin 44 slides in the elongated hole 43, the main body frame 37 rotates downward about the horizontal pin 31, and the hook portion 50. Is caught on the pin 20 and prevents the carriage 14 from descending. At this time, the impact load due to the inertia of the carriage 14 is applied to the pin 2
0 and the main body frame 37, but they are alleviated by the shock absorbing member 28. Here, since three hook portions 50 are provided at intervals sufficiently shorter than the mounting pitch of the pins 20, even if one of them does not engage the pin 20, the next hook portion 50 is It is possible to engage with the vehicle 20 and stop the carriage 14 with a short descending distance.

Then, the wire rope cutting sensors 55 and 56 detect that the wire rope 54 is broken,
The hydraulic cylinder 45 extends and the pin 44 at the tip descends,
The hook 50 is pressed through the guide plate 42 to prevent the body frame 37 from jumping up. Figure 6
In the figure, 57 is a sensor for detecting that the hooking portion 50 is hooked on the pin 20, and 58 is a sensor for detecting the hooking portion 50 on the pin 2.
The sensor which detects that it is out of 0 is shown.

In FIG. 2, reference numeral 60 denotes a seat cushion on the upper portion of the carriage 14, 61 is a cord reel for a power cable, 62 is a cord reel for a control cable, and 63 in FIG.
Indicates a hydraulic unit.

Therefore, when the oblique traveling of the oblique crane 10 is carried out, it is confirmed that the sensor 58 operates and the main body frame 37 is raised so that the engaging portion 50 is not engaged with the pin 20. , The bogie 14 is moved up and down by driving the winch 23 at the upper part. If the wire rope 54 breaks, as described above, the main body frame 37 that constitutes the escape prevention member 13 rotates downward, and the hooking portion 50 provided at the tip portion is caught by the pin 20. The carriage 14 stops. In addition, when the diagonal crane 10 is stopped at an intermediate position on the slope to operate the crane,
Extend the hydraulic cylinder 45 to attach the hook 50 to the pin 2
Operation is carried out in the state of being hung at 0, which ensures safety. In the above-mentioned embodiment, the hydraulic cylinder is used as the pressing drive means for pressing the hook portion, but an air cylinder, an electric cylinder or the like may be used.

[0016]

As is apparent from the above description, in the oblique traveling crane according to the first to fourth aspects, in an emergency, the escape prevention member falls and pivots to hang on the pin of the pin rack arranged below. Since the stopper is caught and the truck stops, the truck does not run out of control. Therefore, the work can be performed safely. Then, since the escape prevention member operates and the pressing drive means for holding the escape prevention member is provided, the operation of the hooking portion is ensured and the safety is further improved.

[Brief description of drawings]

FIG. 1 (A) and (B) are overall layouts of an oblique traveling crane.

2A and 2B are a plan view and a front view, respectively, of an oblique traveling crane.

3 is a view taken along the line AA in FIG.

FIG. 4 is a view taken along the line BB in FIG.

5A is a partially omitted plan view of the pin rack installed on the inclined surface, and FIG. 5B is a view taken along the line CC in FIG.

FIG. 6 is a partial front view around the escape prevention member.

FIG. 7 is a partial plan view around the escape prevention member.

FIG. 8 is a partial side view around the escape prevention member.

FIG. 9 is an explanatory diagram of a mounted state of a pin rack.

[Explanation of symbols]

 10 Oblique Crane 11 Inclined Surface 12 Pin Rack 13 Escape Prevention Member 14 Truck 15 Crane Main Body 16 Anchor Bolt 17 Guide Rail 18 Guide Rail 19 Auxiliary Plate 20 Pin 21 Boom 22 Rubber Wheel 23 Winch 24 Vertical Wheel 25 Horizontal Wheel 26 Supporting Member 27 Support Member 28 Shock absorbing member 29 Mounting bracket 31 Horizontal pin 32 Face plate 33 Face plate 34 Connecting bracket 35 Both sleeves 36 Vertical pin 37 Body frame 38 Wire sheave 39 Wire guide roller 40 Wire guide roller 42 Guide plate 43 Long hole 44 pin 45 Hydraulic cylinder 46 Vertical plate 47 Vertical plate 48 Horizontal plate 49 Horizontal plate 50 Hooking portion 51 Slope 52 Right angle surface 53 Fixed shaft 54 Wire rope 55 Wire rope cutting sensor 56 Wire rope cutting sensor 57 Sensor 58 Sensor 60 upholstery 61 cord reel 62 the cord reel 63 hydraulic unit

Claims (4)

[Claims] 1. A trolley having wheels on both sides of the bottom and slanting an inclined plane, a crane body mounted on the trolley, and a trolley that is elevated along the inclined plane while pulling a wire rope to be wound. And a winch, which is provided with a pin rack in which a plurality of pins are juxtaposed on the inclined surface along the traveling line of the trolley, and a base end of the escape prevention member having a hooking portion on the bottom surface that is hooked on the pin in an emergency. A part of the escape prevention member mounted on the trolley rotatably, and the escape prevention member is placed on the stretched wire rope so that a part of the escape prevention member is disengaged from the pin. In an emergency, the pin is pivoted by its own weight to be engaged with the engaging portion of the pin, and further, in an emergency, a pressing drive means for holding the engaged state of the engaging portion is provided. Row crane. 2. The oblique traveling crane according to claim 1, wherein the pressing drive means is composed of a hydraulic cylinder, and is driven by detecting breakage of the wire rope. 3. The oblique traveling crane according to claim 1, wherein a plurality of the hooking portions are provided at intervals sufficiently shorter than the pitch of the pins. 4. The oblique traveling crane according to claim 1, wherein the escape prevention member is connected to the trolley via a shock absorbing member.