JP2005132523A - Self-travelling conveyor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-traveling conveyor device capable of finely adjusting a position of a belt conveyor end portion, and easily and precisely carrying out positioning work of a belt conveyor fixing portion and the like. <P>SOLUTION: A belt conveyor 2 is supported to a vehicle by a first hydraulic cylinder 61, a second hydraulic cylinder 72, and a third hydraulic cylinder 73. The second hydraulic cylinder 72 and the third hydraulic cylinder 73 are journaled to a journalling portion O coaxially with the belt conveyor 2. When the belt conveyor 2 is in a tilting position at the time of working, the common journaling portion O respectively adjusts expanding amount of the second hydraulic cylinder 72 and the third hydraulic cylinder 73, thereby moving in a longitudinal direction of the belt conveyor 2 in addition to a vertical direction. A fixing portion 26 can be two-dimensionally moved in the vertical and fore-and-aft directions. Therefore, a worker can finely adjust a position of the fixing portion 26 of the belt conveyor 2 while visually observing the fixing portion 26. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a self-propelled conveyor apparatus in which a belt conveyor is attached to a self-propelled vehicle.

  As a self-propelled conveyor device, for example, a self-propelled conveyor device disclosed in Patent Document 1 is known. This self-propelled conveyor device includes a vehicle in which an upper vehicle body is pivotably attached to a lower vehicle body having a traveling body, and a belt conveyor attached to the upper vehicle body. The belt conveyor protrudes forward and backward from the vehicle. In this case, the belt conveyor is pivotally supported by a bracket provided on the upper vehicle body, and can be rotated by a predetermined angle by a hydraulic cylinder.

JP 2002-211736 A

  By the way, when the self-propelled conveyor device is used in a ship loader for shipping, a fixing portion is provided at one end of the belt conveyor, and this fixing portion is fixed to the lower portion of the hopper feeder provided in the dump approach. There is a need to. In such a case, it is necessary to rotate the belt conveyor and perform the positioning operation of the belt conveyor fixing portion. However, in the self-propelled conveyor apparatus described in Patent Document 1, the belt conveyor only rotates up and down around the pivotal support portion of the bracket. In addition to the operation, it is necessary to move the vehicle in the front-rear direction, and the fixing positioning operation is complicated.

  It is also conceivable that the belt conveyor is supported by the first hydraulic cylinder and the swing arm for the vehicle, and the swing arm is rotated by the second hydraulic cylinder. The fixed part is pivoted up and down around the pivot part to the swing arm by the first hydraulic cylinder, and the pivot part is only pivoted up and down around the pivot part of the swing arm by the second hydraulic cylinder. Therefore, it is not possible to perform fine position adjustment, and it is necessary to move the vehicle back and forth in addition to the rotation operation of the belt conveyor.

  This invention was made to solve the above-mentioned conventional drawbacks, and its purpose is to enable delicate position adjustment of the belt conveyor end, thereby easily positioning the belt conveyor fixing part, etc. Another object of the present invention is to provide a self-propelled conveyor device that can be accurately performed.

  Accordingly, the self-propelled conveyor apparatus according to claim 1 is a self-propelled conveyor apparatus in which the belt conveyor 2 is attached to the vehicle 1, and the belt conveyor 2 is positioned on one side in the longitudinal direction of the belt conveyor 2 with respect to the vehicle 1. The first support mechanism 6 is supported by a second support mechanism 7 located on the other side in the longitudinal direction of the belt conveyor 2, and the first support mechanism 6 is supported at one end side by the vehicle body 1 and at the other end side. The first support member 7 is pivotally supported by the belt conveyor 2, the second support mechanism 7 is made up of a second stretch member 72 and a third stretch member 73, and the second stretch member 72 has one end side thereof. While being pivotally supported by the vehicle 1, the other end side is pivotally supported by the belt conveyor 2, and the third elastic member 73 has one end side closer to the first elastic member 61 than the second elastic member 72. Pivoted to Both the other end is characterized in that it is pivotally supported by the second elastic member 72 and substantially coaxial with respect to the belt conveyor 2.

  The self-propelled conveyor device according to claim 2 is provided with a fixing portion 26 for fixing to the other member on the second support mechanism 7 side of the belt conveyor 2 and detects that the fixing portion 26 is fixed. A fixing detection means is provided, and permission means for permitting free extension / contraction of the second extension member 72 and the third extension member 73 is provided only when a fixed state is detected by the fixing detection means.

  In the self-propelled conveyor device according to claim 3, when free extension / contraction of the two expansion / contraction members 72 and 73 is not permitted even though the fixed state is detected by the fixed detection means, the first expansion / contraction member 61 It is characterized by providing a restricting means for restricting expansion and contraction.

  According to the self-propelled conveyor device of the first aspect, the belt conveyor rotates around the common pivot portion of the second elastic member and the third elastic member by the expansion and contraction of the first elastic member. In this case, the common pivot portion can be moved not only in the vertical direction but also in the longitudinal direction of the belt conveyor by expanding and contracting the second elastic member and the third elastic member. In this way, the common pivot portion of the belt conveyor can be moved two-dimensionally, so that the position of the end of the belt conveyor can be finely adjusted. As a result, positioning work of the belt conveyor fixing portion and the like can be easily performed. And it is possible to carry out accurately.

  According to the self-propelled conveyor device of claim 2, since the second telescopic member and the third telescopic member are allowed to freely expand and contract only when the fixing portion of the belt conveyor is fixed, In a state where the fixing portion is not fixed, the second elastic member and the third elastic member do not freely expand and contract. If the second stretchable member and the third stretchable member are in a freely stretchable state when the fixing portion of the belt conveyor is not fixed, there is a disadvantage that the belt conveyor falls, but the above configuration Therefore, the occurrence of such an inconvenient phenomenon can be prevented.

  According to the self-propelled conveyor device of claim 3, the expansion and contraction of the first expansion and contraction member is restricted when the free expansion and contraction of both the expansion and contraction members is not permitted even though the fixing portion of the belt conveyor is fixed. . If the first expansion / contraction member is expanded / contracted when free expansion / contraction of both expansion / contraction members is not permitted despite the fixed portion of the belt conveyor being fixed, Although the belt conveyor is deformed due to the bending force acting on the pivotal support portions of both the expansion and contraction members, the above-described configuration can prevent such an undesired phenomenon from occurring.

  Next, a specific embodiment of the self-propelled conveyor device of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an overall view of the self-propelled conveyor device. As shown in FIG. 1, the self-propelled conveyor device has a self-propelled vehicle 1 and a belt conveyor 2 attached to the vehicle 1. The vehicle 1 travels in the direction of arrow a in FIG. In the following description, the aforementioned traveling direction (longitudinal direction of the belt conveyor 2) is the front-rear direction, and in FIG. 1, the left side is the rear and the right side is the front. In addition, the direction orthogonal to the traveling direction is the left-right direction. The vehicle 1 includes a lower vehicle body 3, traveling bodies 4 provided on the left and right sides of the lower vehicle body 3, and an upper vehicle body 5 attached to the lower vehicle body 3. The belt conveyor 2 is positioned above the upper vehicle body 5 and is supported on the upper vehicle body 5 by a first support mechanism 6 on one side in the front-rear direction (front side) and a second support mechanism 7 on the other side in the front-rear direction (rear side). Has been. And the 1st support mechanism 6 and the 2nd support mechanism 7 have the horizontal attitude | position shown in FIG. 1, and the front-back direction one side (front side) is high as shown in FIG. 2, and the front-back direction other side (rear side) is low. Move to a tilted posture. When the vehicle is traveling, the horizontal posture shown in FIG. 1 is adopted. When the vehicle is operated, the inclined posture shown in FIG. 2 is adopted. When the vehicle is loaded and transported, the transportation posture is lowest as shown in FIG. . Note that the belt conveyor 2 can be positioned at a position lower than the driver's seat 53 as in this transport posture, while the belt conveyor 2 is disposed at the center in the left-right direction of the vehicle 1. This is because the seat 53 is disposed at a position shifted from the central portion in the left-right direction of the vehicle 1 as shown in FIG.

  The belt conveyor 2 has a head pulley 21 attached to one longitudinal end portion (rear end portion) of a conveyor frame 20 elongated in the front-rear direction, and a drive pulley 22 attached to the other longitudinal end portion (front end portion). The belt 23 is wound around the drive pulley 22. The belt conveyor 2 is longer than the entire length (front-rear length) of the vehicle 1 and protrudes forward and rearward from the vehicle 1. A hopper 25 is attached to one end (rear side) of the conveyor frame 20 in the longitudinal direction. A fixing portion 26 for fixing to a lower portion of a hopper feeder (not shown) provided in the dump approach is provided below one end portion (rear end portion) in the longitudinal direction of the conveyor frame 20.

  As shown in FIG. 4, the upper vehicle body 5 is mounted on the lower vehicle body 3 so as to be able to turn. The traveling body 4 of the lower body 3 includes a track frame 40, a crawler type traveling body including a drive sprocket 41 and an idler 42 provided on the track frame 40, and a crawler belt 43 wound around the drive sprocket 41 and the idler 42. It is.

  As shown in FIGS. 4 and 5, the first support mechanism 6 includes a pair of left and right first hydraulic cylinders (first telescopic members) 61. The first hydraulic cylinder 61 is disposed so as to extend obliquely upward and outward, and a base end portion thereof is pivotally attached to the turning frame 51 of the upper vehicle body 5 at a position on the front side in the longitudinal direction of the belt conveyor 2. The tip of the rod 62 is pivotally attached to the belt conveyor 2. The first hydraulic cylinder 61 is also referred to as a front lift cylinder.

  The second support mechanism 7 includes a pair of left and right second hydraulic cylinders (second telescopic members) 72 and a pair of left and right third hydraulic cylinders (third telescopic members) 73. The second hydraulic cylinder 72 is disposed so as to extend obliquely upward and outward, and a base end portion thereof is pivotally attached to the track frame 52 of the upper vehicle body 5 at a position on the rear side in the longitudinal direction of the belt conveyor 2. The tip of the rod 74 is pivotally attached to the belt conveyor 2. The base end portion of the third hydraulic cylinder 73 is a position behind the second hydraulic cylinder 72 (on the first hydraulic cylinder 61 side) and higher than the base end portion of the second hydraulic cylinder 72. The tip of the rod 75 is pivotally attached to the belt conveyor 2. It should be noted that the second hydraulic cylinder 72 and the third hydraulic cylinder 73 are pivotally attached to a pivot portion O that is coaxial with the belt conveyor 2. Further, the third hydraulic cylinder 73 is arranged in a state of extending obliquely upward and outward in the horizontal posture of the belt conveyor 2 (FIG. 1), and the belt conveyor 2 is in an inclined posture (FIG. 2) during work. Sometimes, it is arranged in a manner extending substantially outward in the horizontal direction. The second hydraulic cylinder 72 may be referred to as a rear lift cylinder, and the third hydraulic cylinder 73 may be referred to as a rear lock cylinder.

  According to the self-propelled conveyor device, the belt conveyor 2 rotates around the common pivot O of the second hydraulic cylinder 72 and the third hydraulic cylinder 73 by the expansion and contraction of the first hydraulic cylinder 61. As shown in FIG. 2, when the belt conveyor 2 is in an inclined posture during work, the common pivot O adjusts the expansion and contraction amounts of the second hydraulic cylinder 72 and the third hydraulic cylinder 73 respectively. In addition to the vertical direction, the belt conveyor 2 can be moved in the longitudinal direction. Thus, the common pivot part O of the belt conveyor 2 can be moved two-dimensionally. And according to it, the fixed part 26 can also be moved two-dimensionally up and down and back and forth. Therefore, the operator can finely adjust the position of the fixing portion 26 of the belt conveyor 2 while visually observing the fixing portion 26. As a result, as shown in FIG. 6, the vehicle 1 is moved back and forth as shown in FIG. 6 for the positioning operation when fixing the belt conveyor fixing portion 26 to the lower part of the hopper feeder (not shown) provided in the dump approach. It is possible to carry out easily and accurately.

  Next, the safety function provided in the self-propelled conveyor device will be described. This is related to fixing the fixing portion 26 of the belt conveyor 2 to a lower portion of a hopper feeder (not shown) provided in the dump approach. That is, if the second hydraulic cylinder 72 and the third hydraulic cylinder 73 are in a freely expandable / contractible state when the fixing portion 26 of the belt conveyor 2 is not fixed, the belt conveyor 2 falls. An inconvenient phenomenon occurs. Also, if the first hydraulic cylinder 61 is expanded and contracted when both the hydraulic cylinders 72 and 73 are not allowed to freely expand and contract even though the fixing portion 26 of the belt conveyor 2 is fixed, the belt conveyor 2 causes a disadvantageous phenomenon in which the belt conveyor 2 is deformed by a bending force acting on the fixing portion 26 and the pivotal support portion O of both hydraulic cylinders 72 and 73 as a fixing point. Therefore, the following control attempts to prevent such an inconvenient phenomenon.

  First, the structure of the fixing part 26 will be described. As shown in FIGS. 7 and 8, the fixing portion 26 is rotatably attached to the rear end portion of the belt conveyor 2 by a pin 27. The fixing part 26 has a fixing hole 28 for fixing to the lower part of the hopper feeder. An attachment hole 29 extending in the diameter direction from the fixed hole 28 and opening in the fixed hole 28 is formed, and the proximity sensor 30 is inserted and disposed in the attachment hole 29. Further, the bottom side of the mounting hole 29 communicates with the outside through a drawing hole 31, and the lead wire 32 of the proximity sensor 30 is drawn out through the drawing hole 31. The proximity sensor 30 is fixed to the mounting hole 29 by a set bolt (not shown), and the proximity sensor 30 and the lead wire 32 are filled with a protective material 34 such as silicon resin or rubber. . The lead-out portion of the lead wire 32 is protected by a wiring guard 35. One proximity sensor 30 is provided on each of the left and right sides of the belt conveyor 2. When a fixing pin (not shown) is inserted into the fixing hole 28 in order to fix the fixing portion 26 of the belt conveyor 2 to the lower part of the hopper feeder, the proximity sensor 30 is fixed electromagnetically. A pin is detected and an ON signal is output. Based on the output of ON signals from the left and right proximity sensors 30, it is detected that the fixing portion 26 is fixed (fixed state).

  Next, a drive system hydraulic circuit for each of the hydraulic cylinders 61, 72, 73 will be described with reference to FIG. In the figure, reference numeral 80 denotes a control unit, and the control unit 80 incorporates various control valves. The hydraulic cylinders 61, 72, and 73 are supplied and discharged with pressure oil by the control unit 80, and the rods 62, 74, and 75 extend or contract. Communication valves 85 and 86 are provided between the pair of hydraulic lines 81 and 82 connected to the second hydraulic cylinder 72 and between the pair of hydraulic lines 83 and 84 connected to the third hydraulic cylinder 73, respectively. It is connected. Both communication valves 85 and 86 are operated by solenoids, and the solenoids are turned on by operating a communication valve switch provided in the driver's seat 53. When the communication valves 85 and 86 are turned on, in the second hydraulic cylinder 72 and the third hydraulic cylinder 73, the cylinder chambers on the cylinder side and the rod side communicate with each other, and the rods 74 of the hydraulic cylinders 72 and 73 are connected to each other. 75 is in a freely movable state, that is, a state in which it can freely expand and contract.

  A safety function control method will be described with reference to FIG. This control example is an example in which control is performed in software using a microcomputer. First, in step S1, it is determined whether or not the fixing unit 26 is fixed (proximity switch ON / OFF). If not fixed, the process proceeds to step S2, and the state returns to step S1 while the power of the communication valves 85 and 86 is maintained in the OFF state to continue this state. In step S1, if the fixing portion 26 is fixed, the process proceeds to step S3, the communication valves 85 and 86 are turned on, the process proceeds to step S4, and the communication valve provided in the driver's seat 53. It is determined whether or not the switch has been turned ON. If the ON operation has been performed, the communication valves 85 and 86 are turned ON in step S5, whereby the rods 74 and 75 of the second and third hydraulic cylinders 72 and 73 can freely move, that is, freely extend and contract. (Step S6). If NO in step S4, that is, if the fixed portion 26 is fixed, but the communication valve switch is not turned ON, the process proceeds to step S7. In step S7, it is determined whether or not the operation of the first hydraulic cylinder 61 has been performed. If the operation operation has not been performed, the process returns to step S1. If the operation operation has been performed, the process proceeds to step S8, where the communication valve switch lamp blinks or a buzzer sounds to give a warning. In this case, the expansion / contraction operation of the first hydraulic cylinder 61 is prohibited (restricted).

  According to the above control method, only when the fixing part 26 of the belt conveyor 2 is fixed, the second hydraulic cylinder 72 and the third hydraulic cylinder 73 are allowed to freely expand and contract (steps S1 to S6). ) In a state where the fixing portion 26 of the belt conveyor 2 is not fixed, the second hydraulic cylinder 72 and the third hydraulic cylinder 73 do not freely expand and contract. Therefore, in a state where the fixing portion 26 of the belt conveyor 2 is not fixed, the second hydraulic cylinder 72 and the third hydraulic cylinder 73 can freely expand and contract, and the belt conveyor 2 falls. Occurrence can be prevented. In addition, when the fixed portion 26 of the belt conveyor 2 is fixed (steps S1 and S3), the free hydraulic expansion and contraction of both the hydraulic cylinders 72 and 73 is not permitted (step S4). The expansion and contraction of the cylinder 61 is restricted, and the communication valve switch lamp is blinked or a buzzer is sounded to give a warning (step S8). Accordingly, when the second hydraulic cylinder 72 and the third hydraulic cylinder 73 can be operated in the fixed state of the fixing portion 26, an undesirable phenomenon occurs in which the belt conveyor 2 is deformed by the operation of the first hydraulic cylinder 61. Can be prevented. In step S1 to step S6, only when the fixing portion 26 of the belt conveyor 2 is fixed, a permitting unit that allows the second hydraulic cylinder 72 and the third hydraulic cylinder 73 to freely expand and contract is configured. In step S8, the expansion and contraction of the first hydraulic cylinder 61 is restricted when the free expansion and contraction of both the hydraulic cylinders 72 and 73 is not permitted even though the fixing portion 26 of the belt conveyor 2 is fixed. It constitutes a regulation means.

  FIG. 11 shows a control circuit when the same control as described above is performed in a circuit. As shown in the figure, a contact 91 of the proximity switch 30, a contact 92 of the communication valve switch, and a solenoid 93 for operating the communication valves 85 and 86 are connected in series between the buses. That is, when the proximity switch 30 is turned ON and the communication valve switch is turned ON, the communication valves 85 and 86 are operated, and the second hydraulic cylinder 72 and the third hydraulic cylinder 73 are connected to the rods 74, 75 is in a state where it can move freely, that is, in a state where it can freely expand and contract. A contact 94 and a buzzer operating contact 95 are connected in series between the contact 91 of the proximity switch 30 and the contact 92 of the communication valve switch and between the negative bus. The buzzer operation contact 95 is connected in parallel with a communication valve switch lamp blinking contact 96. The contact 94 is turned on when the first hydraulic cylinder 61 is operated when the communication valve switch is not turned on. Accordingly, when the first hydraulic cylinder 61 is operated when the communication valve switch is OFF even when the proximity switch 30 is ON, the contact 94 is turned ON and the communication valve switch lamp blinks. At the same time, a buzzer is sounded to give a warning, and the expansion and contraction of the first hydraulic cylinder 61 is prohibited (regulated). Even if such a circuit configuration is adopted, it is possible to perform substantially the same control as in FIG. Only when the fixing portion 26 of the belt conveyor 2 is fixed by the contact 91 of the proximity switch 30, the contact 92 of the communication valve switch, and the solenoid 93 that operates the communication valves 85 and 86, the second hydraulic cylinder 72. And the permission means which permits the free expansion-contraction of the 3rd hydraulic cylinder 73 is comprised. Further, although the fixing portion 26 of the belt conveyor 2 is fixed by the contact 92 of the communication valve switch, the contact 94, the buzzer operation contact 95, and the like, the both hydraulic cylinders 72 and 73 can freely expand and contract. A restricting means for restricting expansion and contraction of the first hydraulic cylinder 61 when not permitted is configured.

It is a front view when a belt conveyor exists in a horizontal attitude | position in embodiment of the self-propelled conveyor apparatus of this invention. It is a front view when a belt conveyor exists in an inclination posture in the said embodiment. It is a front view when a belt conveyor exists in a transport posture in the said embodiment. It is an enlarged front view of the principal part of the said embodiment. It is a top view of the vehicle of the said embodiment. It is a front view which shows the position adjustment normal state of the fixing | fixed part of a belt conveyor in the said embodiment. It is a front view which shows the fixing | fixed part of the said embodiment. It is sectional drawing of the said fixing | fixed part. It is a circuit diagram of the hydraulic cylinder drive system in the embodiment. It is a flowchart figure which shows the control method of the said embodiment. It is a circuit diagram which shows the other control method of the said embodiment.

Explanation of symbols

  1 ... Vehicle, 2 ... Belt conveyor, 6 ... First support mechanism, 7 ... Second support mechanism, 26 ... Fixing part, 61 ... First hydraulic cylinder (first telescopic member), 72 ... Second hydraulic cylinder (second telescopic member), 73 .. Third hydraulic cylinder (third telescopic member)

Claims (3)

  In a self-propelled conveyor device in which a belt conveyor (2) is attached to a vehicle (1), the belt conveyor (2) is located on one side in the longitudinal direction of the belt conveyor (2) with respect to the vehicle (1). It is supported by a support mechanism (6) and a second support mechanism (7) located on the other side in the longitudinal direction of the belt conveyor (2). The first support mechanism (6) has one end on the vehicle body (1). The second support mechanism (7) is supported by the second elastic member (72) and the third elastic member. The first elastic member (61) is pivotally supported and the other end is pivotally supported by the belt conveyor (2). The second stretchable member (72) is composed of a member (73), and one end side of the second stretchable member (72) is pivotally supported by the vehicle (1) and the other end side is pivotally supported by the belt conveyor (2). 73), the one end side is the 1st expansion-contraction rather than the said 2nd expansion-contraction member (72). It is pivotally supported by the vehicle (1) at a position on the material (61) side, and the other end is pivotally supported substantially coaxially with the second telescopic member (72) with respect to the belt conveyor (2). A self-propelled conveyor device.   A fixing detection means for detecting that the fixing portion (26) is fixed while providing a fixing portion (26) for fixing to the other member on the second support mechanism (7) side of the belt conveyor (2). And a permitting means for allowing the second telescopic member (72) and the third telescopic member (73) to freely expand and contract only when the fixed state is detected by the fixing detecting unit. The self-propelled conveyor device according to claim 1.   Regulating means for restricting expansion / contraction of the first expansion / contraction member (61) when free expansion / contraction of the both expansion / contraction members (72) (73) is not permitted despite the detection of the fixed state by the fixing detection means. The self-propelled conveyor device according to claim 2, wherein: