JPH03216496A - Truck crane - Google Patents

Abstract

PURPOSE:To prevent excessive tension from acting on a hanging streak unit of a hoist during running time by mounting a stopper metal fixture to a side part of a strut and providing a stopper in a point end side lower part of the second arm so as to improve running stability. CONSTITUTION:When a hanging streak unit 11 is tightened by operating a hoist 7 in a winding up direction in a condition that a hook 12, connected to the hanging streak unit 11 of the hoist 7, is engaged with a stopper metal fixture 13 mounted to a strut 2, the intermediate part of a supporting metal fixture 9, fixed to a main unit 8 of the hoist 7, is pressed to a stopper in a point end side of the second arm 5, and the hoist 7 is supported in a condition that it is restricted in a horizontal direction by a horizontal shaft 10, stopper and the tightened hanging streak unit 11. In this way, during running time of a truck crane, the main unit 8 of the hoist 7, hanging down-supported by the point end part of the second arm 5, can be held by a simple means so as to be prevented from vibration and swivel.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a truck crane in which a swing crane is mounted on a truck.

(Conventional technology) Conventionally, as a truck crane, (1) Unexamined Japanese Patent Publication No. 64-
As disclosed in Publication No. 48799, a column is installed at the front of the loading platform in a truck, and the base end of a support arm is pivoted to the upper end of the column by a horizontal axis, and the upper part of the column and the support arm are connected. A support arm depression/elevation angle adjustment device is provided between the base end side, a locking metal fitting is fixed to the lower tip of the support arm, and a hook attached to the upper part of the main body of the hoist is hung on the locking metal fitting. Construction truck crane, (2) 9th
As shown in the figure, the lower part of the column 2 is fixed to the truck bed 18, and the base end of the 17th arm 3 extending in the horizontal direction is pivotally connected to the upper end of the column 2 by the vertical shaft 4. The base end of a second arm 5, which is longer than the first arm 3, is pivotally attached to the top of the tip of the arm 3 through an intermediate vertical shaft 6, and a supporting metal fitting is attached to the top of the main body 8 of the hoist 7'. The lower part of the support fitting 9 is fixed, and the upper part of the support fitting 9 is pivotally connected to the tip of the second arm 5 by a horizontal shaft 10 perpendicular to the longitudinal direction of the arm.
A locking fitting 13 for locking the hook l2 connected to the hanging strip 11 of the hoisting machine 7 is fixed, and when the truck crane travels, the hook l2 is engaged with the locking fitting 13, and The hoisting machine 7 is operated in the hoisting direction to remove the hanging strip 11.
A truck crane is known that is constructed to be tensioned. [Problem to be Solved by the Invention] In the case of the truck crane described in (1) above, when the truck is run with the hoist suspended and supported by the tip of the support arm, vibration or rocking of the truck causes The stability of the truck crane deteriorates because the hoisting machine shakes a lot. In order to improve the stability of a truck crane when traveling on a truck, it is necessary to perform the complicated task of removing the hoist from the tip of the support arm before traveling on a truck. In addition, in the case of the truck crane described in (2) above, if the truck crane vibrates or rocks while traveling, the hoisting machine 7
Since the main body 8 is supported between the horizontal shaft 10 and the locking fitting 13 without being restrained in any way in the horizontal direction, even a slight horizontal force due to the body weight of the main body 8 will cause vibration or rocking. Therefore, a large dynamic load acts on the hanging strip l1, and as a result, the overload prevention device built in the hoisting machine 7 is activated, and the hoisting strip 11 is loosened and the hoisting machine 7 The disadvantage is that the vibration or oscillation becomes increasingly large.

The object of the present invention is to provide a truck crane that can advantageously solve the above-mentioned problems.

[Means for Solving the Problems] In order to achieve the above object, in the truss crane of the present invention, the lower part of the support column 2 is fixed to the truck 1,
The base end of the first arm 3 extending in the horizontal direction is pivotally connected to the upper end of the support column 2 by the vertical shaft 4, and Long 27th -
The base end of the arm 5 is pivoted by an intermediate vertical shaft 6, and the lower part of a support fitting 9 is attached to the upper part of the main body 8 of the hoist 7, and the upper force 9 of the support fitting 9 and the 27th arm 5 are A hook 12 is pivotally attached to the tip of the arm by a horizontal shaft 10 perpendicular to the longitudinal direction of the arm, and is connected to the side of the support 2 to the hanging strip 11 of the hoisting machine 7. A stopper 13 is attached to the second arm 5, and a stopper 14 is provided at the lower part of the tip side of the second arm 5, and the stopper 14 is brought into contact with the side surface of the support fitting 9 on the column side. In addition, the lower part of the column 2 is fixed to the track 1, and the base end of the 17th arm 3 extending in the horizontal direction is attached to the column 2.
A second arm 5 that is longer than the first arm 3 is pivotally connected to the upper end of the first arm 3 by a vertical shaft 4 and is located above the tip of the first arm 3.
The lower end of the support fitting 9 is attached to the upper part of the main body 8 of the winding 1117, and the upper part of the support fitting 9 is attached to the tip of the second arm 5. ,
The arm is pivoted by a horizontal shaft 10 perpendicular to the longitudinal direction of the arm, and a locking fitting 13 for locking a hook 12 connected to the hanging strip 11 of the hoisting machine 7 is attached to the side of the support 2. Also, by providing the base end portion of the first arm 3 with a strike bar 15 that makes the main body 8 of the hoisting machine 7 come into contact with it,
The above objective can be achieved.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 6 show an embodiment of the first invention, in which a mounting arm l7 fixed to the lower end of a vertical outer column 16 with a square cross section is installed in front of a loading platform 18 of a truck l. The inner column 23, which has a square cross section, is fitted to the outer column 16 so that it can be raised and lowered and not rotated. A pin hole 24 for holding the lower position of the inner column is provided on the upper side of the inner column 23, and a pin hole 25 for holding the upper position of the inner column is provided on the lower side of the inner column 23. Lower end outer periphery and outer column l6
Spacer/slide shoe 26.2'7 on the inner circumference of the upper end
are fixed by welding or screws, and the outer column 16 and the inner column 23 constitute the column 2.

The lower end of a vertical spring guide member 28 disposed concentrically on the lower side inside the outer column 16 is fixed to a support plate 29 fixed to the lower end of the outer column 16, and One end of the pin support cylinder 30 is fitted and fixed by welding, and the locking pin 31 inserted into the pin holes 24 to 25 is slidably fitted into the pin support cylinder 30, and the locking pin 31 and the pin The handle 32 arranged on the outside of the support tube 3o is the connection shaft 3.
3, and the locking pin 31 and the bottle support cylinder 3
A pin insertion spring 34 is interposed between the outer column 16 and the outer column 16, and an annular locking fitting 13 is fixed to the side of the outer column 16. and the support plate 29, an inner column push-up spring 3 made of a helical spring is provided.
6 is interposed in a compressed state, and the spring guide member 28 is arranged inside the inner column push-up spring 36.

A vertical shaft 4 is fixed by welding to the upper end plate 35 of the inner column 23 of the support 2, and a cylinder 37 at the base end of the first arm 3 rotates around the vertical shaft 4 via an upper bearing 38 and a lower bearing 39. The upper part of the intermediate vertical shaft 6 is fixed to the base end of the second arm 5 which is freely fitted and is longer than the first arm 3. is rotatably fitted through an upper bearing 38 and a lower bearing 39, and when the second arm 5 is stacked on the first arm 3, the distal end side of the second arm 5 crosses the column 2. 1 is configured to protrude to the opposite side of the arm 3.

The lower part of the support fitting 9 is fixed by a bolt 41 to the upper part of the main body 8 of the hoisting machine 7 which is an electric chain bronch driven by the power supply of the truck 1, and the upper end of the support fitting 9 is connected to the second A second arm 5 is removably connected to the tip of the arm 5 by a horizontal shaft 10 made of a bolt extending laterally perpendicular to the longitudinal direction of the arm.
A swing operation handle 42 is attached to the tip of the second arm 5, and a middle portion of the support fitting 9 is attached to the bottom of the tip of the second arm 5 when the second arm 5 is stacked on the first arm 3. A stopper 14 is provided that abuts the support column side, that is, the side surface of the intermediate side of the second arm, and a gap is provided between the support metal fitting 9 and the stopper 14 when the hoist 7 is in the load lifting/lowering transport state. .

When adjusting the height of the truck crane, first, as shown in FIG.
is arranged so as to almost overlap on the first arm 3, and then the hook l2 connected to the hanging strip 11 of the hoisting machine 7
is engaged with a locking metal fitting 13 fixed to the side of the outer column 16.

When raising the inner column 23 of the truck crane to a predetermined position and locking it, operate the hoisting machine 7 in the downward direction with the locking pin 31 pulled out from the pin hole 24 for holding the inner column lowered position. Then, the inner column 23 and the parts supported by it are gradually moved upward by the force of the inner column push-up spring 36, and the pin hole 24 is moved upward from the locking pin 31 by the upward movement of the inner column 23. When the locking pin 31 is deviated to , the handle 32 of the locking pin 31 is released. When the inner column 23 is moved upward to a predetermined position, the locking bottle 3 is pushed by the force of the bottle pushing spring 34.
1 is automatically inserted into the pin hole 25 for holding the inner column in the raised position, and the inner column 23 is locked in the raised position N.

When lowering the inner column 23 of the truck crane to a predetermined position and locking it, operate the hoisting machine 7 in the hoisting direction with the locking pin 31 pulled out from the pin hole 25 for holding the inner column raised position. Then, the inner column 23 and the parts supported by it are moved downward, and when the bottle hole 25 is deviated downward from the locking bottle 3l due to the downward movement of the inner column 23, the locking pin 31 is moved downward. Let go of the handle 32. When the inner column 23 is moved down to a predetermined position, the locking pin 31 is automatically inserted into the inner column lowered position holding bottle hole 24 under the force of the bottle insertion spring 34, and the inner column 23 is moved downward. It is locked in the lowered position.

When loading and unloading cargo using a truck crane, the inner column 23 is raised to a predetermined position and locked, and the first arm 3 is rotated around the vertical axis 4 at the upper end of the column 2. The hoisting machine 7 is placed at an appropriate position by rotating the second arm 5, rotating the second arm 5 about the intermediate vertical shaft 6, or performing an appropriate combination of these rotations.
Next, the hoist 7 is operated to move the cargo up and down.

When running the truck 1, as shown in FIGS. 1 and 2, the inner column 23 is locked in the lowered position, and the hoisting machine 7
When the hoist 7 is operated in the hoisting direction with the hook 12 engaged with the locking metal l3 fixed to the side of the outer column 16 and the hanging strip 11 is tensioned, the support metal 9 is pressed against the stopper 14 of the second arm 5, and the hoisting machine 7 is supported by the horizontal shaft 1o, the stopper 14, and the tensioned hanging strip l1, so that vibrations or Even when the hoist 7 swings, the main body 8 of the hoist 7 does not vibrate or rock.

7 and 8 show an embodiment of the second invention, in which an arm main body 4 is attached to a cylindrical body 37 at the base end of the first arm 3.
3, a stop collar l5 that abuts the main body 8 of the hoist 7 is fixed, and when the hoist 7 is in the load lifting/lowering transport state, there is a gap between the main body 8 of the hoist 7 and the stop collar 15. Although the stopper 14 on the distal end side of the second arm 5 in the embodiment of the first invention is omitted, the other configurations are the same as in the embodiment of the first invention.

When carrying out this invention, a non-extendable support may be used.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

With the hook l2 connected to the hanging strip I1 of the hoisting machine 7 engaged with the locking metal fitting 13 attached to the column 2,
When the hoisting machine 7 is operated in the hoisting direction and the hanging strip 11 is tensioned, the intermediate part of the support fitting 9 fixed to the main body 8 of the hoisting machine 7 is pressed against the stopper 14 on the tip side of the second arm 5. Alternatively, the main body 8 of the hoisting machine 7 is pressed against the stopper 15 provided at the base end of the first arm 3, and the hoisting machine 7 is moved between the horizontal shaft 10 and the stopper 14. ．． 15 and the tensioned hanging strip 11, the hoisting machine 7, which is suspended and supported by the tip of the second arm 5, is The main body 8 can be held so as not to vibrate or rock by a simple means, so that even if the truck crane vibrates or rocks while traveling, the wooden body 8 of the hoisting 81 will not vibrate or rock. Therefore, the running stability of the truck crane can be improved without removing the hoisting machine 7 of the truck crane, and when the truck crane is running, the hoisting machine 7 It is possible to prevent excessive tension from acting on the hanging strip 11.

[Brief explanation of drawings]

1 to 6 show an embodiment of the first invention, in which FIG. 1 is a partially longitudinal front view showing the state of the truck crane when it is running, and FIG. FIG. 3 is a partially longitudinal front view showing an enlarged view of the tip of the arm and the vicinity of the hoisting machine, FIG. A partially cutaway vertical side view showing an enlarged view of the second arm and the vicinity of the hoisting machine, Figure 5 is a vertical front view showing the strut in a shortened state, and Figure 6 is an enlarged cross-sectional view of A-AvA in Figure 5. be. 7 and 8 show an embodiment of the second invention, in which FIG. 7 is a partially longitudinal front view showing the state of the truck crane when it is running, and FIG. 8 is a hoisting in FIG. Part N showing an enlarged view of the machine and the vicinity of the stonopa at the base end of the first arm
FIG. FIG. 9 is a partially longitudinal front view showing the state of a conventional truck crane when it is running. In the leap, l is the track, 2 is the support, 3 is the first arm, 4 is the vertical shaft, 5 is the second arm, 6 is the intermediate vertical shaft, 7 is the hoisting machine, 8 is the main body of the hoisting machine, 9 is the support metal fitting, 10 is the horizontal axis,
11 is a hanging strip, 12 is a hook, 13 is a locking metal fitting, l4
and l5 is a stopper, 16 is an outer column, 17 is a mounting arm, 18 is a loading platform, l9 is a chassis, 20 is a bracket,
2l is a bolt, 22 is a nut, 23 is an inner column, 24 is a bottle hole for holding the inner column in the lowered position, 25 is a pin hole for holding the inner column in the upper position, 28 is a spring guide member, 31 is a locking pin, 34 is a pin An insertion spring 36 is a spring for pushing up the inner column, and 42 is a handle for turning operation.

Claims (2)

[Claims] (1) The lower part of the column 2 is fixed to the track 1, the base end of the first arm 3 extending in the horizontal direction is pivotally attached to the upper end of the column 2 by the vertical shaft 4, and the tip of the first arm 3 is fixed to the track 1. The base end of a second arm 5, which is longer than the first arm 3, is pivotally attached to the upper part by an intermediate vertical shaft 6, and the lower part of a support fitting 9 is attached to the upper part of the main body 8 of the hoisting machine 7 to The upper part of the metal fitting 9 is
A hook 12 is pivotally attached to the tip of the second arm 5 by a horizontal shaft 10 perpendicular to the longitudinal direction of the arm, and is connected to the side of the support 2 to the hanging strip 11 of the hoist 7. A truck crane is provided with a locking fitting 13 for stopping the truck crane, and a stopper 14 is provided at the lower part of the tip side of the second arm 5 to abut the side surface of the support fitting 9 on the column side. (2) The lower part of the column 2 is fixed to the track 1, the base end of the first arm 3 extending in the horizontal direction is pivotally connected to the upper end of the column 2 by the vertical shaft 4, and the tip of the first arm 3 is fixed to the track 1. The base end of a second arm 5, which is longer than the first arm 3, is pivotally attached to the upper part by an intermediate vertical shaft 6, and the lower part of a support fitting 9 is attached to the upper part of the main body 8 of the hoisting machine 7 to The upper part of the metal fitting 9 is
A hook 12 is pivotally attached to the tip of the second arm 5 by a horizontal shaft 10 perpendicular to the longitudinal direction of the arm, and is connected to the side of the support 2 to the hanging strip 11 of the hoist 7. A truck crane is provided with a locking fitting 13 for stopping the crane, and a stopper 15 for abutting the main body 8 of the hoist 7 at the base end of the first arm 3.