JPH04317995A - Truck crane with revolving arm for supporting winch and long object - Google Patents

Abstract

PURPOSE:To prevent a long object from slipping off from a revolving arm for supporting both a winch of a truck crane and the object to be carried. CONSTITUTION:The base end of a revolving arm 4 for supporting both a winch and a long object to be carried is mounted with possibility of horizontal revolution on a supporting member 3, which is secured to the front side of the rear body 2 of a truck 1, and an arm lock device 5 is installed between the base end of the revolving arm 4 and the upper part of the supporting member 3. This arm lock device 5 holds the revolving arm in such an arrangement that it can be extended in the direction across the rear body width. At both sides in longitudinal direction of the revolving arm 4, long object stoppers 6 are installed so that it can be raised, fallen, and revolved by a horizontal shaft 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck crane having a swing arm for supporting a hoist and supporting a long object, which can load and transport a long object.

0002

[Background Art] Conventionally, as disclosed in Japanese Utility Model Application Publication No. 61-65085, a truck crane has a support member fixed to the front side of the loading platform of the truck, and a swing arm attached to the upper part of the support member. A truck crane is known that has a structure in which the base end of the swing arm is pivotally mounted on a vertical shaft, and a hoist is attached to the tip of the swing arm.

0003

[Problems to be Solved by the Invention] When transporting a long object using the conventional truck crane, the swing arm is placed and fixed in a position extending in the width direction of the loading platform, and the long object is moved between the swing arm and the swing arm. It is conceivable to transport the vehicle by placing it on the back of the loading platform. However, since only the base end of the swing arm is supported by a support member, if a heavy long object or a large number of long objects are placed on the swing arm, vibrations or rocking may occur while the truck is running. , long objects may slip off the swing arm.

0004

[Means for Solving the Problems] In order to advantageously solve the above problems, in the truck crane having a swing arm for supporting a hoisting machine and supporting a long object according to the present invention, a front side portion of a loading platform 2 of a truck 1 is provided. The base end of the swing arm 4 for supporting the hoist and long object is attached to the support member 3 fixed to the support member 3 so as to be horizontally swingable, and the base end of the swing arm 4 and the upper part of the support member 3 An arm locking device 5 is provided between the arms to hold the swing arm in a state where it is extended in the width direction of the loading platform, and long object stoppers 6 are installed on both sides of the swing arm 4 in the longitudinal direction to raise or lower the object using a horizontal shaft 7. Install so that it can rotate freely.

[0005]

[Embodiment] FIGS. 1 to 17 show an embodiment of the present invention, in which a support base 10 fixed to the lower end of a columnar support member 3 of a truck crane is installed in front of a loading platform 2 of a truck 1. A vertical cylinder 14 at the proximal end of a horizontal transverse arm 13 mounted on the side and fixed by bolts 11 and arranged at a slightly higher level than the roof of the cab 12 in the truck 1 is attached to the support member 3 The horizontal arm 13 is fitted onto a vertical shaft 15 fixed to the upper end thereof via a bearing so as to be rotatable and not move in the vertical direction. The proximal end of the elevating arm 16 is pivotally connected to the proximal end by a horizontal shaft 17, and a hoisting machine 18 consisting of an electric chain block is attached to the distal end of the elevating arm 16 via a hanging fitting. 19 is fixed, and the horizontal arm 13 and the elevation arm 1
6 constitutes a swing arm 4.

A vertical hole 20 is formed in the side surface of the upper end of the support member 3.
A holding fitting 22 having a lower flange 21 is fixed by welding, and a rotation stopper 23 that protrudes above the upper end surface of the supporting member 3 is integrally formed on one side of the upper part of the holding fitting 22 in the circumferential direction of the supporting member. A locking pin 24 having a truncated conical surface at its upper end is provided in the vertical hole 20.
A screw rod 25, which is fitted to be movable up and down and connected to the lower end of the locking pin 24, is inserted into the lower flange 21,
A pin-pushing spring 26 is interposed between the lower end of the locking pin 24 and the lower flange 21, a stopper nut 27 is screwed onto the lower end of the screw rod 25, and a pin-pulling handle 28 is inserted. The lock pins 24 are connected via a connecting member 29 made of a metal wire or a fiber string, and are pushed up by a pin push-up spring 26 to protrude upward from the upper end surface of the holding fitting 22 .

A pin receiving fitting 31 having a truncated conical hole 30 is fixed to the side surface of the vertical tube 14 by welding, and a screw rod 25 and a pin pulling handle 28 are fitted into the holding fitting 22.
The arm locking device 5 is constituted by a locking pin 24, a pin push-up spring 26, and a pin receiving fitting 31. When the swing arm 4 is rotated until the pin holder 31 hits the swing stopper 23 while the locking pin 24 is pulled down by pulling the pin pull handle 28 by hand, the swing arm 4 will move above the front of the loading platform 2. The truncated conical hole 30 extends in the width direction of the loading platform, and the pin holder 31 has a truncated conical hole 30.
is arranged on the upper part of the lock pin 24, and when the hand is released from the pin pull-down handle 28, the lock pin 24 is pushed up by the pin push-up spring 26 and fitted into the pin receiver 31, and the pivot arm 4 is Locked to prevent rotation.

One end of a first support leg 34 is pivotally connected to a bracket 33 fixed to the lower part of the intermediate portion of the elevating arm 16 via a horizontal shaft 35.
One end of the supporting leg 36 is pivoted by a pivot 37 to form a bending/extending supporting leg 38, and the other end of the second supporting leg 36 includes:
The roller 39 placed on the bottom plate of the horizontal arm 13 is connected to the horizontal shaft 40.
A plate-shaped first leg support portion 41 is fixed to the lower part of the elevating arm 16 at a position away from the bracket 33 toward the proximal end of the elevating arm 16, and a second
The part of the support leg 36 near the pivot 37 and the bracket 33
The distal end portion of the transverse arm 13 is connected to the distal end portion of the transverse arm 13 via a supporting leg traction spring 42.
An inverted L-shaped roller stopping stopper 43 that locks the horizontal shaft 40 is fixed, and an inverted L-shaped floating prevention stopper 44 that locks the horizontal shaft 40 is fixed on both left and right sides of the intermediate lower part of the horizontal arm 13. has been done.

A stopper 45 for maintaining the bent state that engages with the other end of the first supporting leg 34 on the bracket 33 side is provided on the side of the bracket 33 at one end of the second supporting leg 36. 45 holds the second support leg 36 in a state slightly bent toward the proximal end of the elevating arm 16 with respect to the first support leg 34, and the second support leg 36 is held in a wide direction toward the elevating arm 16 side with respect to the first support leg 34. Prevent it from being refracted.

FIG. 9 shows the state in which the elevating arm 16 is laid down. From this state, when the elevating arm 16 is pushed up by hand or with a pushing device, the support leg traction spring 4
2, the second support leg 36 is raised and rotated, and as shown in FIG. Since the second support leg 36 is tilted so as to be deviated from the upper part to the lower part toward the distal end side of the horizontal arm 13, the weight of the hoist 18 and the elevation arm 16, etc. 40 is pressed against the roller stopper 43, and is therefore held in the state shown in FIG.

When the elevating arm 16 is to be lowered from the state shown in FIG. As shown in FIG.
is slightly bent toward the elevating arm 16 side with respect to the first supporting leg 34, and the slightly bent bending/extending supporting leg 38
is inclined from the upper part to the lower part so as to be deviated toward the base end side of the horizontal arm 13. Therefore, when the lifting force is released from the elevating arm 16, the hoisting machine 18, the elevating arm 16, etc. Due to the weight of , the bending/extending support leg 38 rotates around the horizontal axis 35 to approach the elevating arm 16, and as shown in FIG.
The state shown in is reached.

A holding member 55 made of a square steel pipe is disposed at the front of the loading platform so as to extend in the width direction of the loading platform, and a mounting plate 46 having a female screw hole is welded to the upper and lower parts of one end of the holding member 55. fixed by each mounting plate 46
is removably fixed to the support base 10 and a holding fitting 47 fixed to the lower part of the support member 3 with bolts 48, and the support member 49 fixed to the other end of the holding member 55 by welding is attached to the loading platform 2. The lower end of the swing arm support column 32 made of a square pipe extends in the front-rear direction to a mounting bracket 51 fixed to the upper part of the other end of the holding member 6 by a bolt 50. Horizontal shaft 57 consisting of a bolt
An upwardly opening groove-shaped support bracket 52 is fixed to the upper part of one end side of the holding member 6, and an engaging protrusion 9 having a vertical shaft is fixed to the upper end of the swing arm support support pillar 5. The rubber ring 53 and the annular metal plate 54 fixed to the upper surface of the rubber ring 53 are fitted into the engaging protrusion 9, and the rubber ring 53 is fixed to the upper surface of the swing arm support column 5 with adhesive. An engagement recess 8 consisting of a hole into which an engagement protrusion 9 is inserted is provided at a lower portion of the tip side of the elevating arm 16 in the swing arm 4 .

A long object stopper 6 with an L-shaped cross section is arranged at both ends of the elevating arm 16, and a mounting plate 56 connected to one side of the elongating object stopper 6 is attached to a side surface of the elevating arm 16. The mounting plate 56 is rotatably attached to the elevation arm 16 by a horizontal shaft 7 made of a bolt, and when the long object stopper 6 is raised and rotated,
The base end of the other side of the long object stopper 6 is the elevation arm 16.
When it hits the upper surface and stops, and when the long object stopper 6 is rotated to fall down towards the middle side in the longitudinal direction of the elevating arm, the tip of the other side of the elongating object stopper 6 abuts against the upper surface of the elevating arm 16. Stop. A cover 58 that closes the space between the horizontal arm 13 and the elevating arm 16 when the elevating arm 16 is tilted upward is fixed to the base end side of the elevating arm 16 with bolts, and is attached to the rear of the loading platform 2. A long object receiving member 59 extending in the width direction of the loading platform is fixed with a bolt 60.

A support member 61 made of a square steel pipe is slidably but unrotatably inserted into the holding member 55, and the base end of a screw rod 62 extends in the front-rear direction at the outer end of the support member 61. A female screw member 66 is fixed to the upper end of a leg member 65 which is pivotally connected by a horizontal shaft 63 and has a seat plate 64 fixed to its lower end. Outrigger 67 with screw rod 62
is configured. The outrigger 67 is attached to the holding member 5
5, and has a cross section that can be inserted into the holding member 55, and is used to lock the hook of the hoist to the other end of the holding member 55.
8 is fixed.

When extending and contracting the outriggers 67, the worker grasps the upper part of the leg member 65 and rotates it. When storing the outriggers 67 in the holding member 6, the outriggers 67 are aligned in line with the support member 61. and then insert the outriggers 67 together with the support member 61 into the holding member 55. When using the outrigger 67, pull out the outrigger 67 from inside the holding member 6, and
After the support member 61 is projected from the holding member 55 and the outrigger 67 is suspended from the end of the support member 61, the leg member 65 is rotated to press the seat plate 64 of the leg member 65 against the roadbed 69. .

When transporting a long object by mounting it on the swing arm 4 and the rear part of the loading platform 2, the arm locking device 5 is installed with the swing arm 4 arranged so as to extend in the width direction of the loading platform.
The horizontal arm 13 is fixed so that it does not rotate, and the swing arm support column 32 is erected, and the engagement protrusion 9 on the upper part of the column 32 is inserted into the engagement recess 8 at the lower end of the elevating arm 16. With the support 32 tilted so that its upper part is slightly inclined toward the support member 3, the support 32 supports the elevating arm 16, and the long object stopper 6 is erected. Next, as shown in FIGS. 13 and 14, a large number of long objects 70 are moved between the longitudinal intermediate portion (the portion between the pair of long object stoppers 6) of the tilted arm 16 of the swing arm 4 and the loading platform. The truck 1 is mounted across the rear of the truck 2, and the truck 1 is run in this state.

When the long object 70 is not transported by the truck 1, as shown in FIGS. 15 and 16, the swing arm supporting column 32 is removed from the elevating arm 16 and laid down. Fit into.

When carrying out the present invention, an engaging protrusion may be provided at the lower part of the elevating arm 16, and an engaging recess may be provided at the upper end of the swing arm support column 32. Further, the cross-sectional shape of the support column 32 may be circular.

[0019]

According to the present invention, the base end of the swing arm 4 for supporting the hoisting machine and supporting a long object is attached to the support member 3 fixed to the front side of the loading platform 2 of the truck 1 so that it can be horizontally turned. The base end of the swing arm 4 and the support member 3 are freely attached to each other.
An arm lock device 5 is provided between the upper part of the swing arm 4 and the upper part of the swing arm 4 to hold the swing arm in a state extending in the width direction of the loading platform.
is mounted on the horizontal shaft 7 so that it can be rotated up and down, so that when the front part of the long object 70 is mounted on the longitudinal middle part of the swing arm 4 and transported, the truck will not vibrate or swing. Even if the long object 70 tries to slip off the swing arm 4, the long object stopper 6 can prevent the long object 70 from slipping off, so that the long object 70 can be safely transported without falling from the truck 1. Can be done.

[Brief explanation of drawings]

FIG. 1 is a partially longitudinal front view showing a truck crane having a swing arm for supporting a hoist and supporting a long object.

FIG. 2 is a partially longitudinal rear view showing an enlarged view of the distal end of the elevating arm, the upper end of the column, and the elongated object stopper in FIG. 1;

3 is a partially vertical rear view showing the elongated object stopper shown in FIG. 2 in a laid down state; FIG.

FIG. 4 is a plan view of the truck crane.

FIG. 5 is a longitudinal cross-sectional side view showing a strut attachment portion to a holding member.

FIG. 6 is a longitudinal sectional side view showing how the elongated object stopper is attached to the elevating arm.

FIG. 7 is a longitudinal sectional side view showing the attachment state of the holding member into which the supporting member is inserted.

FIG. 8 is a partially longitudinal rear view showing the arm lock device.

FIG. 9 is a partially longitudinal rear view showing a state in which the elevating boom of the truck crane is laid down.

FIG. 10 is a partially longitudinal rear view showing a state in which the elevating boom of the truck crane is tilted upward.

11 is a partially longitudinal rear view showing a state in which the elevating arm is slightly pushed up from the state in FIG. 10; FIG.

FIG. 12 is a cross-sectional view taken along line AA in FIG. 9;

FIG. 13 is a side view showing a state in which a long object is mounted across the swing arm and the rear of the loading platform.

FIG. 14 is a plan view showing a state in which a long object is mounted across the swing arm and the rear part of the loading platform.

FIG. 15 is a longitudinal rear view showing a state in which the outriggers are stored.

FIG. 16 is a partially longitudinal rear view of a truck crane using outriggers.

FIG. 17 is a partially longitudinal rear view showing a state in which the support column is laid down and the lower hook of the hoist is locked to the hook locking fitting.

[Explanation of symbols]

1 Truck 2 Loading platform 3 Support member 4 Swivel arm for supporting the hoisting machine and supporting long objects 5 Arm locking device 6 Long object stopper 7 Horizontal shaft 8 Engagement recess 9 Engagement protrusion 10 Support stand 13 Lateral arm 16 Elevation arm 18 Hoisting machine 23 Swivel stopper 24 Lock pin 26 Pin push-up spring 31 Pin receiver 32 Swivel arm support column 51 Mounting bracket 52 Strut bracket 53 Rubber ring 54 Annular metal plate 55 Holding member 56 Mounting plate 57 Horizontal shaft 58 Cover 59 Long object receiving member 70 Long object

Claims (1)

[Claims] 1. A base end of a swing arm 4 for supporting a hoisting machine and supporting a long object is attached to a support member 3 fixed to the front side of a loading platform 2 of a truck 1 so as to be horizontally swingable,
An arm lock device 5 is provided between the base end of the swing arm 4 and the upper part of the support member 3, and the arm lock device 5 holds the swing arm in a state extending in the width direction of the loading platform. This truck crane has a swivel arm for supporting a hoist and a long object, on both sides of which a long object stopper 6 is attached by a horizontal shaft 7 so as to be rotatable up and down.