JPH03216494A - Mounting structure for crane strut in truck crane - Google Patents

Abstract

PURPOSE:To make it possible to easily work and carry a crane, formed in a small size and a light weight, and to firmly mount a strut to a truck in a stable condition by removably fixing the base end part of a mounting arm to the lower end part of the strut and placing a seat plate of the mounting arm on the load carrying platform of the truck to be fixed to a chassis. CONSTITUTION:The base end part of a mounting arm 2 is removably fixed by bolts 3 to both right and left sides in the lower end part of a strut 1 of a truck crane, and a seat plate 4 in the point end of each mounting arm 2 is placed on a load carrying platform of a truck 5 and fixed to its chassis 7 through a fixing bolt 8. By this constitution, since the crane can be easily worked and carried in a small size and a light weight and further the seat plate 4 of each mounting arm 2 is fixed to the chassis 7 of large strength through the fixing bolts 8 because the strut 1 and the mounting arm 2 can be separately conveyed when the crane is carried, the strut 1 can be mounted firmly in a stable condition to the truck 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mounting structure for mounting a crane support in a truck crane to a truck.

[Prior Art] Conventionally, as a mounting structure for a crane support in a truck crane, a wide seat plate is fixed to the lower end of the support in the crane, as disclosed in Japanese Patent Application Laid-open No. 64-48799. A mounting structure is known in which the board is placed on the bed of a truck and secured with multiple bolts. [Problems to be Solved by the Invention] In the case of the above-mentioned conventional crane support mounting structure, stability deteriorates if the area of the seat plate is narrow, so it is necessary to make the seat plate wider, and the seat plate is not large enough for the support. Since it is fixed in advance,
Increasing the area of the seat plate increases the size and weight of the column with the seat plate, which requires processing of the column with the seat plate. This makes transportation and installation work difficult. Furthermore, since the seat plate fixed to the lower end of the column is placed on the truck bed and fixed with bolts, there are problems in that the mounting strength of the column is weak and stability against lateral forces is poor. The object of this invention is to provide a crane support mounting structure for a truck crane that advantageously solves the above-mentioned problems. [Means for Solving the Problems] In order to achieve the above object, in the crane support mounting structure of the truck crane of the present invention, bases of the mounting arms 2 are provided on both left and right sides of the lower end of the support support 1 in the truck crane. The ends are removably fixed by Bonolet 3, and the seat plate 4 at the tip of each mounting arm 2 is placed on the loading platform 6 of the truck 5, and the seat plate 4 is attached to the chassis 7 of the truck 5.
(fixed via fixing port 8 and nut)
Ru.

〔Example〕

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

1 to 8 show an embodiment of the present invention, in which vertical support plates 10 are fixed by welding to both left and right sides of the lower end of a vertical outer column 9 having a square cross section. A vertical mounting plate 12 is fixed by welding to the base end of the mounting arm main body 11 having a square cross section extending from the mounting arm main body 11, and an end plate 13 perpendicular to the distal end of the mounting arm main body 11 is fixed by welding. At the lower end of the plate 13, a seat plate 4 that protrudes toward the mounting plate side is bent and connected, and on the seat plate 4,
A plurality of elongated holes 14 extending in the left-right direction are provided at intervals in the front-rear direction, and the mounting arm 2 is constituted by the mounting arm main body 11, the mounting plate 12 fixed thereto, the end plate 13, and the seat plate 4. has been done.

Support plates lO fixed on both left and right sides of the lower end of the outer column 9
The mounting plate 12 of the mounting arm 2 is abutted and fixed with a large number of bolts 3, and the seat plate 4 of each mounting arm 2 is placed on the front part of the loading platform 6 of the truck 5, and is mounted on the left and right sides of the truck 5. A plurality of brackets 15 are fixed by welding to the side surface of the chassis 7 below the seat plate 4 at intervals in the front-rear direction, and the fixing port 8 is connected to the elongated hole 14 of the seat plate 4 and the loading platform. Through hole 6 and bracket 1
The seat plate 4 and the loading platform 6 are tightly connected by the upper nut 16 inserted through the through hole in the horizontal plate at 5 and further screwed into the port 8, and the bolt 8, and the bolt 8 is screwed into the upper nut 16. The bracket 15 is tightened and held by the intermediate nut 17 and the lower nut 18 that are combined, and the seat plate 4 of the mounting arm 2 is attached to the fixing port 8, the upper nut 16 screwed thereto, and the intermediate nut 17. , lower nut 1
8 and a bracket 15, it is fixed to the chassis 7. The inner column 19 having a square cross section is fitted into the outer column 9 so as to be able to rise and fall freely but not rotate, and a pin hole 20 for holding the lowered position of the inner column is provided on the upper side of the inner column 19.
A pin hole 2l for holding the raised position of the inner column is provided on the lower side, and spacer/slide shoes 22 and 23 are fixed to the outer periphery of the lower end of the inner column 19 and the inner periphery of the upper end of the outer column 9 by welding or screws. The column 1 is constituted by the outer column 9 and the inner column 19. The lower end of the vertical spring guide member 24 arranged concentrically on the lower side inside the outer column 9 is fixed to a support plate 25 fixed to the lower end of the outer column 9, and the lower end of the vertical spring guide member 24 is fixed to a support plate 25 fixed to the lower end of the outer column 9. Bin support cylinder 26
The locking pin 27, whose one end is fitted and fixed by welding and is inserted into the pin hole 20.21, is connected to the pin support cylinder 26.
The locking pin 27 and the handle 28 disposed on the outside of the pin support tube 26 are connected via a connecting shaft 29, and the locking pin 27 and the end of the pin support tube 26 are connected to each other via a connecting shaft 29. A pin insertion spring 30 is interposed between the outer column 90 and the plate.
A locking metal fitting 31 is fixed to the side part, and an inner column push-up spring 33 made of a helical spring is in a compressed state between the upper end plate 32 fixed to the upper end of the inner column 19 and the support plate 25. The spring guide member 24 is interposed with a spring 33 for pushing up the inner column.
is placed inside.

A vertical shaft 34 is fixed to the upper end plate 32 of the inner column 19 in the support 1 by welding, and a cylindrical body 36 at the base end of the first arm 35 rotates around the vertical shaft 34 via an upper bearing 37 and a lower bearing 38. The upper part of the intermediate vertical shaft 40 is fixed to the base end of a second arm 39 which is freely fitted and is longer than the first arm 35.
The lower part of the 27th arm 39 is rotatably fitted through the upper bearing 37 and the lower bearing 3, and when the second arm 39 is stacked on the first arm 35, the tip side of the 27th arm 39 touches the support column 1. The first arm 35 is configured to extend beyond the first arm 35 and protrude to the opposite side of the first arm 35. A support fitting 4 is attached to the upper part of the main body 43 of the hoisting machine 42 which is an electric chain hoist operated by the power supply from the trunk 5.
The lower part of -4 is fixed, and the upper end of the supporting metal fitting 44 is
The tip of the second arm 39 is removably connected to the tip of the second arm 39 by a bolt 45 extending in the lateral direction perpendicular to the longitudinal direction of the arm. Funoku 48 is attached to the hanging strip 47 of the machine 42.
are connected. When adjusting the height of the truck rack, first, as shown in FIG. The hook 48 connected to the hanging strip 47 of the hoisting machine 42 is fixed to the side of the outer column 9.
is engaged with. When raising the inner column 19 of the truck crane to a predetermined position and locking it, operate the hoisting machine 42 in the downward direction with the locking pin 27 pulled out from the pin hole 20 for holding the inner column lowered position. Then, the inner column 19 and the parts supported by it are gradually moved upward by the force of the inner column push-up spring 33, and the upward movement of the inner column 19 causes the bottle hole 20 to move upward from the locking bottle 27. When the locking pin 27
Let go of the handle 28. When the inner column l9 is moved upward to a predetermined position, the locking pin 27 is automatically inserted into the inner column raised position holding pin hole 2l by the force of the pin pushing spring 30, and the inner column 19 is moved to the raised position. It is locked in. When lowering the inner column 19 of the truck crane to a predetermined position and locking it, operate the hoisting machine 42 in the hoisting direction with the locking pin 27 pulled out from the pin hole 21 for holding the inner column raised position. Then, the inner column 19 and the parts supported by it are moved downward, and when the pin hole 2l is deviated downward from the locking pin 27 due to the downward movement of the inner column 29, the locking pin ~27 Let go of the handle 28. inner pillar 19
When the bottle insertion spring 30 is moved downward to a predetermined position, the bottle insertion spring 30
Due to this force, the locking pin 27 is automatically inserted into the pin hole 20 for holding the inner column in the lowered position, and the inner column 19 is locked in the lowered position. When loading cargo using a truck crane, the inner column 19 is raised to a predetermined position and locked, and the first arm 35 is moved around the vertical axis 34 at the upper end of the column 2. Swivel the second arm 39 to the intermediate longitudinal axis 40
The hoisting machine 42 is placed at an appropriate position by turning around the center or a suitable combination of these turnings, and then the hoisting machine 42 is operated to carry out the lifting and transport of the cargo.

When running the truck 1, as shown in FIG.
8 is engaged with the locking metal fitting 31 fixed to the side of the outer column 9, and if the hanging strip 47 of the hoisting machine 42 is kept under tension, vertical vibrations can be prevented while the truck crane is running. Even if the crane moves, the second arm 39 can be prevented from leaning vertically, and the first arm 35 and the second arm 39 can be prevented from pivoting around the vertical axis 34 when the crane is traveling. can be prevented.

FIG. 9 shows another example of the mounting arm 2 fixed to the outer column 9, in which a seat plate 4 that protrudes in a direction away from the mounting plate 12 is bent at the lower end of the end plate 13. and a plurality of reinforcing ribs 49 across the seat plate 4 and end plate 13.
are fixed by welding, but the other configurations are the same as in the previous embodiment.

When carrying out this invention, a non-extendable support column 1 may be used. In addition, the bracket 15 is omitted, and the fixing port 8 is inserted into a through hole provided on the top plate of the chassis 7, and the intermediate nut 17 and the lower nut 18 screwed into the fixing port 8 are used to secure the chassis 7. You can also grasp the top plate. [Effects of the Invention] Since the present invention is configured as described above, it produces the following effects. When transporting a crane that is attached to the trunk, the support column 1 and the mounting arm 2 can be transported separately, so the crane can be made smaller and lighter and can be easily processed and transported. The weight of each member constituting the support column can be reduced to facilitate installation work, and the seat plate 4 at the tip of each mounting arm 2 can be attached to the chassis 7 of the truck 5 with fixing bolts 8.
Since it is fixed via a nut, it can be firmly and stably attached to the support column 1 and truck 5 of the crane.

[Brief explanation of drawings]

1 to 8 show an embodiment of the present invention, in which FIG. 1 is a partially longitudinal front view of a crane having a crane support mounting structure of the present invention, and FIG. 3 is a partially longitudinal side view showing the mounting structure of the crane support, FIG. 4 is a perspective view showing the mounting arms fixed to both left and right sides of the lower end of the outer pillar,
FIG. 5 is a longitudinal sectional front view showing a part of the telescoping column and the mounting arm, FIG. 6 is an enlarged sectional view taken along the line A-A in FIG. 5, and FIG. 7 is a truck having the crane column mounting structure of the present invention. FIG. 8 is a partially cutaway side view of the crane, showing how the first and second arms and the hoist are attached to the truck crane. FIG. 9 is a perspective view showing another example of mounting arms fixed to both left and right sides of the lower end of the outer column. In the figure, 1 is a column, 2 is a mounting arm, 3 is a bolt,
4 is the seat plate, 5 is the truck, 6 is the cargo bed, 7 is the chassis 8
is a fixing bolt, 9 is an outer column, IO is a support plate, l1 is a mounting arm body, 12 is a mounting plate, 13 is an end plate, 14 is a long hole,
15 is a bracket, 16 is an upper nut, 17 is an intermediate nut, 18 is a lower nut, 19 is an inner column, 20 is a pin hole for holding the inner column in the lowered position, 21 is a pin hole for holding the inner column in the upper position,
24 is a spring guide member, 27 is a locking pin, 30 is a spring for pin insertion, 3l is a locking metal fitting, 33 is a spring for pushing up the inner column, 3
4 is the vertical axis, 35 is the first arm, 39 is the second arm, 40
is an intermediate vertical shaft, 42 is a hoisting machine, 4 4 is a support fitting, 4 6 is a handle for turning operation, 4 7 is a hanging strip, and 4 8 is a lid.

Claims (1)

[Claims] The base ends of mounting arms 2 are removably fixed to the left and right sides of the lower end of the support column 1 in the truck crane with bolts 3, and the seat plate 4 at the tip of each mounting arm 2 is placed on the loading platform 6 of the truck 5. , the seat plate 4 is fixed to the chassis 7 of the truck 5 via fixing bolts 8 and nuts.This is a crane support mounting structure for a truck crane.