JP2000159500A - Housing detector for swinging work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing detector that detects a boom housing position via one sensor whose adjustment is easy. SOLUTION: This housing detector 25 comprises a limit switch 27 and a cam 29. The cam 29 is disposed on a swinging base 9 and is bendable at its center portion via a hinge portion 39, which interconnects a left swinging abutment member 35 and a right swinging abutment member 37 whose respective flange portions 35a and 37a are mounted on the swinging base 9 for positional adjustments. The limit switch 27 is disposed on a vehicle body 5 so as to come in contact with the left or right swinging abutment member 35 or 37 according to the swinging of the swinging base 9 to detect the telescopic boom position. The limit switch 27 and cam 29 are so positioned that the limit switch 27 comes in contact with the left or right swinging abutment member 35 or 37 of the cam 29 when the telescopic boom is situated over a boom rest.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage detector of a turning work vehicle, and more particularly, to a storage detector of a turning work vehicle for turning a telescopic boom above a boom receiver and storing it in the boom receiver. .

[0002]

2. Description of the Related Art A turning work vehicle includes a turning table which is swingable on a rear portion of a vehicle body and a working device which is pivotally connected to the upper part of the turning table so as to be vertically swingable. is there. A working device holding member that stores and holds the fallen working device is provided at a front portion on the vehicle body of the turning work vehicle.

By the way, in order to store the working device which is turning and moving in the working device holding member, the working table is turned above the working device by turning the swivel table (hereinafter referred to as "work device storage position"). ). Many proposals have already been made for the method of detecting the working device storage position. For example, the actual fairness 6-4958 shown in FIG.
No. 0 discloses a pair of limit switches 6 arranged at a certain distance above the swivel 9.
1, and a pair of cams 51 abutting against these limit switches 61 are provided on the vehicle body 5. When the turntable 9 turns left or right to bring the working device to the working device storage position, one of the limit switches 61 abuts on the cam 51 arranged corresponding to the working device and transmits an ON signal. The swivel base 9 is configured to stop based on this. That is, by providing the two limit switches 61, the working device can be stopped at the working device storage position regardless of the turning direction of the swivel 9.

[0004] Further, as shown in FIG.
There has been proposed a device provided with a dog 63 having a convex portion 63a projecting upward and downward, and a limit switch 65 disposed on the vehicle body 5 and opposed to the dog 63. The convex portion 63a of the dog 63 has a pair of abutting surfaces 67 that incline in the direction of the central axis J as proceeding downward. And
The dog 63 is fixed by inserting the bolt 43 into the oblong hole 69 and screwing it into the swivel 9. The limit switch 65 has a switch portion 65a at the tip end thereof which is extendable and contractible in the horizontal direction (vertical direction in FIG. 3B), and the swivel 9 turns to move the switch portion 65a toward the top of the convex portion 63a. The limit switch 65 outputs an ON signal when it moves while contacting the contact surface 67 and comes near the top. The turning operation of the turntable 9 is stopped based on this ON signal. And
By arranging the dog 63 limit switch 65 so that the ON signal is output from the limit switch 65 when the work device comes to the work device storage position, the work device can be operated regardless of the turning direction of the turntable 9. It can be stopped at the storage position.

[0005]

However, in the method of detecting the storage position of the working device using the dog, if the positioning of the dog and the limit switch is inaccurate, the stop position of the working device depends on the turning direction of the turntable. It may be shifted from the device storage position. Therefore, the position of the dog can be adjusted, but if the position of the dog is adjusted, the pair of abutting surfaces of the protrusions move together, so even if the position of one abutting surface can be adjusted. In addition, the position of the other contact surface is shifted, and it is extremely difficult to adjust the positions of both contact surfaces. Further, in the device described in Japanese Utility Model Publication No. 6-49580, the working device can be stopped at the working device storage position. However, since two limit switches are required, a large amount of labor is required for assembly and adjustment. At the same time, the cost increases.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a storage detector which can detect a storage position of a working device with one sensor and can easily adjust the sensor. Aim.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a storage detector of a turning work vehicle (for example, an aerial work vehicle 1 in the embodiment) of the present invention includes a vehicle body and a turning detector which is capable of turning on the vehicle body. A swivel provided, a working device (e.g., the telescopic boom 11 in the embodiment) disposed on the swivel, and storage holding means (e.g., in the embodiment) provided on the vehicle body for storing and holding the working device. A storage detector of a turning work vehicle having a boom receiver 23), which is provided on the vehicle body and on one of the turning tables, a center portion of which can be freely bent, and a left turning contact portion and a right turning through the center portion. The contact part is connected,
Each of the end portions of the left turning contact portion and the right turning contact portion (for example, the flange portions 35a and 37a in the embodiment) is mounted on a vehicle body or a swivel base so as to be adjustable in position. Position detecting means (e.g., a limiter in the embodiment) which is provided on the other side of the swivel table and which detects the storage position of the working device by abutting on the left swivel contact portion or the right swivel contact portion in accordance with the turn of the turntable. Switch 27), and the cam member is configured such that when the working device is positioned above the storage holding means, the position detecting means abuts on the left turning contact part or the right turning contact part of the cam member. And a position detecting means are preferably provided.

When the swivel table is turned clockwise, the position detecting means contacts the right turning contact portion of the cam member, and the storage position detecting means detects that the working device has been positioned above the storage holding means. When the swivel base is turned to the left, the position detecting means contacts the left turning contact portion of the cam member, and the storage position detecting means detects that the working device has been positioned above the storage holding means. Therefore, the working device can be moved above the storage and holding means irrespective of the turning direction of the turntable, and the working device can be reliably stored in the storage and holding means.

The left turning contact portion and the right turning contact portion of the cam member are freely bendable via a central portion, and each end of the left turning contact portion and the right turning contact portion is located on the vehicle body. Or, since it is attached to the swivel table so that the position can be adjusted, the contact position between the storage detector and the left turning contact portion and the contact position between the storage detector and the right turning contact portion can be separately adjusted. . For this reason, by adjusting either the left turning contact portion or the right turning contact portion that is displaced, if one contact portion is adjusted, the position of the other contact portion is shifted. The position of one contact portion can be adjusted extremely easily in comparison.

[0010] It is preferable that the left turning contact portion and the right turning contact portion are formed in a straight line or a plane so that the storage position detecting means is easy to contact, and are not deformed. The center portion of the cam member is freely bendable, and examples thereof include a case where the left turning contact portion and the right turning contact portion are hinged, and a case where the left turning contact portion and the right turning contact portion are continuously provided by a hinge or the like. The position detecting means outputs contact information indicating that the contact has been made by contacting the left turning contact portion and the right turning contact portion. For example, a contact type sensor (limit switch) is exemplified. Can be.

The position detecting means has at its tip a switch portion which is swingable in the horizontal direction with the swing center as a boundary, and the switch portion moves a predetermined swing angle range from the swing center in accordance with the turning of the swivel. It is preferable that the position detecting means be activated when the position exceeds the predetermined range, and that the switch unit at least contact the left-turning contact portion or the right-turning contact portion of the cam member when the switch portion exceeds the predetermined swing angle range. If the switch section is at least in contact with the left turning contact section or the right turning contact section when the switch section exceeds the predetermined swing angle range, the position detecting means operates and the work is performed above the storage holding means. It can detect that the device is located. For this reason, the storage position of the working device can be detected by the position detection unit having the switch unit.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. This embodiment shows an aspect of an aerial work vehicle having a telescopic boom that is telescopic and pivotable on a vehicle body. First, an aerial work vehicle equipped with the storage detector of the present invention will be described. Fig. 1
As shown in FIG. 3, the driving cabin 3 and the driving cabin 3
A vehicle body 5 provided on the rear side of the vehicle body, outrigger jacks 7 provided on both front and rear sides of the vehicle body 5, a revolving base 9 protruding upward at a rear part on the vehicle body 5 and capable of swiveling, and an upper part of the revolving base 9 And a telescopic boom 11 that is pivotably connected to and can expand and contract. An up-and-down cylinder 13 is swingably connected between a lower portion of the telescopic boom 11 and an intermediate portion of the swivel 9, and the telescopic boom 11 is raised and lowered by the expansion and contraction operation of the up-and-down cylinder 13. A vertical post 15 is provided at the distal end of the telescopic boom 11 so as to be vertically swingable, and a work table 17 is connected to the vertical post 15. An operating device 1 for operating the telescopic boom 11, the swivel 9 and the like is provided on the work table 17.
9 are provided. A hydraulic motor 21 for rotating the turntable 9 is provided below the turntable 9 and in the vehicle body 5. Further, a boom receiver 23 protruding upward is provided on the side of the driving cabin 3 on the vehicle body 5. The telescopic boom 11 is stored by placing the telescopic boom 11 on the boom receiver 23.

Next, the storage detector of the present invention will be described with reference to FIGS. 2A and 2B show the storage detector, FIG. 2A shows a plan view of the storage detector, and FIG. 2B shows a front view of a portion corresponding to the arrow II in FIG. . The storage detector 25 has a limit switch 27 and a cam 29, as shown in FIGS.
The limit switch 27 is located on the vehicle body 5 on the outside of the swivel table 9 in the radial direction.
The main body 27a provided on the fixed plate 31 fixed thereon
And a switch portion 27b which is swingable in the horizontal direction at the tip of the body portion 27a. Switch part 2
7b is a rod-like shape, and has a rotatable bearing 33 at its tip. The switch unit 27b activates the limit switch 27 when the angle θ1 of horizontal (left / right) swinging around the swing center axis J exceeds a predetermined angle range (hereinafter referred to as “operating angle”). To output an ON signal.
The operation angle of the limit switch 27 is in a range of about 11 degrees to about 30 degrees due to manufacturing variations.

FIG. 3 shows the cam 29, FIG. 3 (a) shows a plan view of the cam 29, and FIG. 3 (b) shows a front view of the cam 29. The cam 29 is made of metal, and a plate-shaped left turning contact member 35 and a right turning contact member 37 are hinged via a hinge portion 39. At the bottom of the left turning abutment member 35, a rectangular flange portion 35a protruding in the horizontal direction is provided,
An oblong hole 41 is provided in the flange portion 35a. The right-turning abutment member 37 has a shape symmetrical to the left-turning abutment member 35, and has a rectangular flange 37a protruding in the horizontal direction at the bottom of the right-turning abutment member 37. An oblong hole 41 is provided in the flange portion 37a.

The flange portion 35a of the cam 29 shown in FIG.
A bolt 43 is inserted through an oblong hole 41 provided in 37a, and a female screw (not shown) formed on the upper part of the swivel 9 is used.
, The cam 29 is fixed to the turntable 9 to form a convex shape. At this time, the angle θ2 between the left turning contact member 35 and the right turning contact member 37 is a predetermined angle (hereinafter, referred to as “θ”).
It is referred to as “cam set angle”. ), And is set to be larger than the operation angle of the limit switch 27. For example, when the operation angle is set in the range of 11 degrees to 30 degrees, the cam set angle is set to about 35 degrees.

Further, the limit switch 27 is provided as shown in FIG.
When the telescopic boom 11 is positioned above the boom receiver 23, the switch portion 27b is arranged to abut on the left turning contact member 35 or the right turning contact member 37 to output an ON signal. I have. More specifically, the bearing 33 of the switch portion 27b when the swivel table 9 shown in FIG. 2A rotates (turns clockwise) in the direction of arrow A comes into contact with the clockwise turning contact member 37 of the cam 29, When the limit switch 27 outputs an ON signal when the switch portion 27b swings and exceeds the operation angle, the telescopic boom 11 shown in FIG. 1 is above the boom receiver 23, and the swivel 9 is in the direction of arrow B. (Turn left)
When the limit switch 27 outputs an ON signal when the bearing 33 of the switch 27b comes into contact with the left turning contact member 35 of the cam 29 and the switch 27b swings and exceeds the operating angle, the output signal is shown in FIG. The telescopic boom 11 is above the boom receiver 23.

As shown in FIG. 4, the aerial work vehicle 1 has a controller 45 for controlling the operation of the telescopic boom 11.
have. The controller 45 is connected to the limit switch 27, the operating device 19, the motor operating valve 47, and the boom operating valve 49. Controller 45
Controls the operation of the boom operation valve 49 based on the ON signal of the limit switch 27 to control the extension operation of the hoisting cylinder 13. The motor operation valve 47 controls the operation of the hydraulic motor 21 that is a drive source of the swivel table 9. An operator who is on the work table 17 operates the operation device 19 to operate the motor operation valve 47 via the controller 45. Controls the operation of. In addition, the controller 45 is an actuator other than the hoisting cylinder 13 and the hydraulic motor 21 (for example,
The operation of the outrigger jack 7) can also be controlled.

Next, the operation of the storage detector 25 of the present invention will be described with reference to FIGS. First, in order to store the extended and swiveled telescopic boom 11 on the vehicle body 5 as shown in FIG. 1, an operator on the work table 17 operates the operating device 19 shown in FIG. The operation of the motor operation valve 47 and the boom operation valve 49 is controlled via the control of the hydraulic motor 21 and the operation of the up-and-down cylinder 13. As a result, the telescopic boom 11 performs the contracting operation, and the swivel base 9 performs the turning operation. At this time, FIG.
When the swivel table 9 shown in (1) turns right (in the direction of arrow A) or turns left (in the direction of arrow B), the right turning contact member 37 or the left turning contact member 35 of the cam 29 is moved to the bearing 3 of the switch 27b.
3, when the switch portion 27b swings in the horizontal direction and exceeds the operation angle, the limit switch 27 is activated and turned on.
Output a signal.

The controller 45 shown in FIG. 4 controls the operation of the motor operating valve 47 based on the ON signal from the limit switch 27 to stop the operation of the hydraulic motor 21. The turning operation of the turntable 9 is stopped by the stop of the hydraulic motor 21, and the telescopic boom 11 is stopped above the boom receiver 23. Then, the operator further operates the operation device 19 to control the operation of the boom operation valve 49 via the controller 45 to cause the up-and-down cylinder 13 to fall down and to store the telescopic boom 11 on the boom receiver 23.

Here, the swivel 9 shown in FIG. 2A turns right (in the direction of arrow A) and the telescopic boom 11 is moved to the boom receiver 23.
If the limit switch 27 does not operate even if it is located above the right side, the bolt 43 for fixing the flange portion 37a of the right turning contact member 37 is loosened, and then the right turning contact is performed with the hinge 39 as the center of rotation. By swinging the member 37 counterclockwise,
The position of the right turning contact member 37 is adjusted. At this time, since the left turning contact member 35 is held at the same position, the left turning contact member 35 does not move due to the position adjustment of the right turning contact member 37, and only the portion that needs to be adjusted. Can be adjusted. When the telescopic boom 11 is stopped on the near side of the upper side of the boom receiver 23, the bolt 43 of the flange portion 37a of the right turning contact member 37 is loosened, and the right turning contact is performed with the hinge portion 39 as the center of rotation. The position of the right turning contact member 37 is adjusted by swinging the member 37 clockwise. At this time, the left turning contact member 35 does not move due to the position adjustment of the right turning contact member 37.

When the limit switch 27 does not operate even when the revolving base 9 turns left (in the direction of arrow B) and the telescopic boom 11 is positioned above the boom receiver 23, the flange of the left turning contact member 35 is not used. After loosening the bolt 43 fixing the portion 35a, the position of the left turning contact member 35 is adjusted by swinging the left turning contact member 35 clockwise about the hinge portion 39 as the center of rotation. At this time, since the right turning contact member 37 is held at the same position, the right turning contact member 37 does not move due to the position adjustment of the left turning contact member 35, and a portion that needs to be adjusted. Only can be adjusted. When the telescopic boom 11 stops on the front side above the boom receiver 23, the bolt 43 of the flange portion 35a of the left turning contact member 35 is loosened, and the left turning contact member is rotated about the hinge 39 as the center of rotation. Swing 35 counterclockwise,
The position of the left turning contact member 35 is adjusted. At this time, since the right turning contact member 37 does not move due to the position adjustment of the left turning contact member 35, it is possible to adjust only the portion that needs to be adjusted.

[0022]

According to the storage detector of the turning work vehicle according to the present invention, when the working device is located above the storage holding means, the position detecting means is turned to the left turning contact portion or the right turning contact of the cam member. By disposing the cam member and the position detecting means so as to abut on the part, it is possible to detect that the working device has moved above the storage holding means regardless of the turning direction of the swivel table, Can be reliably stored in the storage holding means.

The position detecting means has at its tip a switch portion which is swingable in the horizontal direction with the swing center as a boundary, and the switch portion is turned at a predetermined swing angle from the swing center in accordance with the turn of the swivel table. When the position detecting means is operated in a state exceeding the range and the switch unit comes into contact with the left turning contact portion or the right turning contact portion of the cam member in a state where the switch portion exceeds the predetermined swing angle range, the switch is turned on. It is possible to detect that the working device is located above the storage and holding means by the position detecting means having the portion.

[Brief description of the drawings]

FIG. 1 is a perspective view of an aerial work vehicle equipped with a storage detector according to an embodiment of the present invention.

FIGS. 2A and 2B show a storage detector according to an embodiment of the present invention, wherein FIG. 2A is a plan view of the storage detector, and FIG. 2B is equivalent to view II of FIG. This shows the limit switch of the part to perform.

3A and 3B show a cam according to an embodiment of the present invention. FIG. 3A shows a plan view of the cam, and FIG. 3B shows a front view of the cam.

FIG. 4 is a block diagram of a telescopic boom control device according to an embodiment of the present invention.

FIG. 5 shows a storage detector according to the prior art.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 aerial work vehicle (turning work vehicle) 5 body 9 turning table 11 telescopic boom (working device) 23 boom receiver (storage holding means) 25 storage detector 27 limit switch (position detection means) 27b switch part 29 cam (cam member) ) 35 Left-turning abutment member 37 Right-turning abutment member J Center axis (swing center)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F205 AA05 BA10 KA07 KA10 3F333 AA08 AB04 CA04 DA07 FA17 FD09 FE03

Claims (2)

[Claims] 1. A vehicle body, a swivel table provided on the vehicle body so as to be freely rotatable, a working device provided on the swivel table, and a work device provided on the vehicle body to store and hold the working device. A storage detector of a turning work vehicle having storage and holding means, the storage detector being provided on the vehicle body and on one of the turning tables, a center portion is freely bendable, and a left turning contact portion and a right portion are connected via the center portion. A turning cam is connected to the turning cam, and each end of the left turning cam and the right turning cam is mounted on the vehicle body or on the swivel so as to be adjustable in position. Provided on the vehicle body and on the other of the swivel table, and detects a storage position of the working device by abutting on the left turn abutment section or the right turn abutment section in accordance with the turn of the turntable. And a position detecting means, wherein the working device is located above the storage and holding means. The cam member and the position detecting means are arranged so that the position detecting means contacts the left turning contact part or the right turning contact part of the cam member when the cam member is turned on. Storage detector for turning work vehicles. 2. The apparatus according to claim 1, wherein said position detecting means has a switch portion at a front end portion which is swingable in a horizontal direction with respect to a swing center, and said switch portion is moved from said swing center in accordance with turning of said turntable. The position detecting means operates in a state exceeding the predetermined swing angle range, and when the switch section exceeds the predetermined swing angle range, the left turning contact portion or the right turning contact of the cam member. The storage detector of a turning work vehicle according to claim 1, wherein the storage detector is at least abutted on the portion.