JPH038696A - Outrigger of special vehicle - Google Patents

Abstract

PURPOSE:To reduce the weight by fusing a receiving member provided with horizontal lower surface onto the inside of the side wall end parts of a horizontal base cylinder and an intermediate beam, fusing a contact member with horizontal upper surface engaged with the lower surface of the receiving member on the outside of the inner beam side wall, and dispersing and transmitting bearing force. CONSTITUTION:A receiving member 6 having a horizontal lower surface is fused onto the inside of the side wall 5 end part of a horizontal base cylinder 4, and the similar receiving member 14 is fused onto the end part of the side wall 11 of an intermediate beam 10. On the outside of the side wall 11, a contact member 12 with horizontal upper surface to contact with the receiving member 6 is fused, and a contact member 19 to contact with the receiving member 14 is provided on an inner beam 17. Thus, the bearing force generated in the support leg 23 of the inner beam 17 end part of an outrigger is received by the receiving members 14, 6 through the contact members 19, 12, distributed to the intermediate beam 10 and the horizontal base cylinder 4, and transmitted to a vehicle body frame 1 without the stress being collected to the side wall part. Hence, the whole weight of the outrigger can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an outrigger for special vehicles such as truck cranes and power shovels.

(Prior art) Conventional outriggers for special vehicles such as truck cranes and power shovels include, for example, the
There is something like the one described in Publication No. 8.

This is a box-shaped structure in which a pair of horizontal base tubes having a common central wall are arranged and fixed on the lower side of the narrow end of the body frame of a truck crane, and hanging fittings are fixed to the upper left and right sides of the horizontal base tubes. The bracket is pinned to a bracket welded to a narrow part of the vehicle body frame, and the horizontal base tube is provided with a pair of horizontal beams having telescopic support legs at the ends and extending and contracting in opposite directions.

After moving this truck crane to the intended cargo handling work site, the horizontal beam is extended, the telescoping support legs are extended to raise the truck crane stably from the ground, the telescoping boom is extended and retracted, and its elevation angle is is adjusted by a derrick cylinder, the crane base is rotated around its center, and the winch on the swivel base is used to wind or unwind the rope for cargo handling work. Due to the load applied to the horizontal beam, a bending moment is generated in the horizontal beam, and the lateral pressure generated near both ends of the longitudinal overlap between the horizontal beam and the horizontal base tube is applied to the vehicle body frame through the pins and brackets of the box-shaped bracket. is transmitted to.

It is known that the maximum extreme pressure is generated at the engagement portion between the horizontal base cylinder end and the horizontal beam base.

(Problem to be Solved by the Invention) However, in the outrigger of such a conventional truck crane, the reaction force generated in the telescopic support leg at the end of the horizontal beam is transferred to the vehicle body through the horizontal base tube, box-shaped bracket, and bracket. It is configured to transmit to the frame side, and in order to increase the critical overturning moment in the lateral direction of the vehicle body, when the horizontal beam is extended, the huge load generated between the base and the end of the horizontal base cylinder will cause the horizontal In order to be able to transmit the load to the vehicle body frame even though the upper edge of the side wall end of the base tube or box-shaped bracket expands outward, each part, especially the entire horizontal base tube, is made thicker. As a result, the weight of the outrigger as a whole increases, which is not desirable in light of recent tightening of restrictions on axle loads based on road traffic regulations.

However, when the horizontal beam of an outrigger on a special vehicle such as a crane is extended, it is pressed downward by the inner end of the horizontal beam and the band is used to disperse the lateral pressure generated on the bottom wall of the horizontal base. Alternatively, it is possible to provide a reinforcing means such as a U-shaped metal fitting on the outside of the bottom wall of the horizontal base cylinder against which the inner end of the horizontal beam comes into contact when it is extended, as disclosed in Japanese Patent Publication No. 45-2624, for example.
Publication No. 7, Publication of Utility Model Publication No. 45-30483, Publication of Utility Model Publication No. 1977
-23810, Utility Model Application Publication No. 50-67511, etc., but none of these give consideration to providing reinforcing means on the end side of the horizontal base tube. Furthermore, no countermeasures were taken against Fukue, which would occur at the end of the cylindrical bracket corresponding to the end of the horizontal base tube.

In this way, in conventional outriggers for special vehicles, the wall thickness of the entire horizontal base cylinder supporting the horizontal beam is increased, or when the horizontal beam is extended, the area near the abutting part at the inner end of the horizontal beam is increased. By arranging a reinforcing piece such as a band or a U-shaped metal fitting around the bottomed outer part of the horizontal base cylinder, measures can only be taken to increase the bending rigidity of the central part of the horizontal base cylinder. There was no suggestion whatsoever that this would lead to a reduction in the strength of the group, such as providing a notch on the tube end or the corresponding tube-shaped bracket end, and as a result,
There was a problem in that this resulted in an increase in the weight of the outrigger, which in turn led to a decrease in the cargo handling capacity of truck cranes, etc.

Also, if you try to store the horizontal beam in the horizontal base cylinder and store the telescopic support legs provided at the ends of the horizontal beam inside the car,
Since the length of the horizontal base beam needs to be shortened from inside the vehicle by at least twice the outside diameter of the telescopic support legs, the length of the horizontal beam during its maximum extension is reduced by a corresponding amount, and the maximum distance between the telescopic support legs on both sides during its extension is reduced accordingly. However, the length of the horizontal base cylinder is reduced compared to the length of the inside of the vehicle, which in turn reduces the critical overturning moment of the truck crane by a corresponding amount. There was a problem that the bearing stability of the truck crane in the range decreased.

In addition, the end of the horizontal base cylinder that supports the horizontal beam.

By providing a reinforcing band around the outer periphery of the end of the horizontal beam, it is expected that the strength of the stress concentration area will increase. Therefore, there was a problem in that the maximum non-overturning moment due to the outrigger was decreased.

The present invention has been made in view of the problems of the conventional examples.

In an outrigger for a special vehicle, a horizontal lower surface support member is welded to the inside of the side wall end of the horizontal base tube and/or the intermediate beam, and a horizontal lower surface support member is welded to the outside of the side wall of the inner beam. The present invention aims to provide an outrigger for special vehicles that can solve the above-mentioned problems by welding a horizontal upper surface attaching member that engages with the horizontal lower surface of the receiving member welded to the inside.

(Means for Solving the Problems) In order to solve the problems of the conventional example as described above, the present invention has a horizontal base cylinder with a rectangular cross section fixed to the lower side of the vehicle body frame. In an outrigger for a special vehicle equipped with an inner beam having the same cross-sectional shape and having a support leg at the end, with or without an intermediate beam, a horizontal lower surface is provided inside the side wall end of the horizontal base tube and/or the intermediate beam. At the same time as welding the receiving member, a horizontal upper surface attaching member that engages with the horizontal lower surface of the receiving member welded to the inner side of the side wall end of the horizontal base tube and/or the intermediate beam is welded to the outer side of the side wall of the inner beam. This is what I did.

(Function) Since the present invention has the above-described configuration, the supporting force generated in the supporting leg of the inner beam end portion of the rectangular cylindrical cross-section of the outrigger of a special vehicle is applied to the member disposed on the outer side of the inner beam side wall. horizontal top surface.

Abuts against the horizontal lower surface of the receiving member welded to the inner side of the side wall end of the horizontal base tube with a rectangular cross section, with or without intervening with the horizontal lower surface of the receiving member welded to the inner side of the side wall end of the intermediate beam having a rectangular cross section. As a result, the stress is transmitted to the vehicle frame side without causing stress concentration on each side wall portion.

(Example) Hereinafter, a first example in which an outrigger for a special vehicle according to the present invention is implemented on a truck crane will be described with reference to FIGS. 1 to 8.

In the figure, 1 is a body frame of a special vehicle such as a truck crane, and 4 is a horizontal base cylinder 4 having a rectangular cylindrical cross section and disposed below the body frame 1. 1, and its end is welded to the lower part of a cylindrical arm 7 that protrudes into the width B of the vehicle body. 5 is a side wall of the horizontal base cylinder 4; 6 is a horizontal lower surface support member formed inside the end of the side wall 5; 8 is a notch provided at the end of the bottom wall of the cylindrical arm 7; 8 is a telescopic supporting leg 23 that is attached to the end of the inner beam 17 when the inner beam 17 is contracted, which will be described later.
A hydraulic cylinder 24 is housed therein.

9A is a side wall 5 of the horizontal base tube 4 and a side wall 11 of a cylindrical intermediate beam 10 with a rectangular cross section that is slidably inserted into the horizontal base tube 4.
Bolts, nuts, 9 to adjust the distance between
B designates bolts and nuts for finely adjusting the distance between the bottom wall of the horizontal base cylinder 4 and the bottom wall of the intermediate beam 10. Furthermore, between the end side wall 5 of the intermediate beam 10 and its bottom wall, and the side wall 18 of the inner beam 17 and its bottom wall section, the above 9A, 9
A spacing fine adjustment means having substantially the same structure as B is provided.

12 is a horizontal upper surface attaching member welded to the outer side of the base of the side wall 11 of the intermediate beam 10 (on the left side in FIG. 1); 13 is the side wall 1;
1 is a horizontal upper surface support member welded to the outside of the end (right side in FIG. 1); 14 is a horizontal lower surface support member welded to the inside of the side wall 11; 15 is smaller than the inner end of the side wall 11; An auxiliary support member 17 with a horizontal upper surface welded to a lower part spaced inwardly has a rectangular cylindrical cross section, and is connected to the intermediate beam 10.
18 is a side wall of the inner beam 17; 19, 20 and 21 are horizontal upper surfaces welded at intervals to the outer base, center and ends of the side wall 18; This member 22 is an auxiliary member with a horizontal lower surface welded to the outer lower part of the proximal end of the side wall of the inner beam 17.

The member 19 is attached to the side wall 11 of the intermediate beam 10 when the inner beam 17 is extended (see FIG. 1).
The member 13 is welded to the outer side of the end portion, and is welded near the inner side thereof, and the horizontal upper surfaces of the members 19, 20 and 21 are formed on the same horizontal plane.

24 is the hydraulic cylinder of the telescopic support #23, and 25 is a ground plate provided at the lower end of the cylinder rod. Note that this ground plate 25 can also be removably attached to the lower end of the cylinder rod.

Next, the operation of this embodiment will be explained.

First, when the truck crane is run on the road, the hydraulic cylinder 24 is used to reduce the telescopic support leg 23 and the ground plate 25 at the lower end of the cylinder rod is sufficiently raised from the ground. The inner beam 17 becomes the intermediate beam 1 by contracting a retractable horizontal cylinder (not shown) whose ends are respectively pivoted between the ends of the inner beam 17.
0, reduced to within the vehicle width B, and the inner beam 1
The hydraulic cylinder 24 attached to the 7th end is housed in the notch 8 of the bottom wall of the cylindrical arm 7, and the inner beam 17 and the intermediate beam 10 are housed in the interior B of the truck crane.

Next, after moving the truck crane equipped with this outrigger to the intended work site, the horizontal hydraulic cylinder (not shown) between the horizontal base tube 4 and the inner beam 17 is extended, and the intermediate beam 10 and the inner beam 17 are connected to the vehicle body frame. Extend it to the side of 1. After that, oil is supplied to the hydraulic cylinder 24 to ground the ground plate 25 at the lower end of the cylinder rod of the telescopic support leg 23, and the inner beam 17. Intermediate beam 10, horizontal base tube 4
The vehicle body frame 1 is raised from the ground via a crane, etc., and a telescoping boom provided on a swivel platform (not shown) on the vehicle body frame 1 is raised, extended, and rotated to carry out cargo handling operations similar to those of conventional cranes.

In this embodiment, based on the reaction force P generated on the telescopic support leg 23 provided at the end of the elongated inner beam 17, the inner beam 17 is welded to the outside of the base of the side wall 18 of the inner beam 17, which is provided with the telescopic support leg 23 at the end. The horizontal upper surface of this member 19 contacts the horizontal lower surface of the receiving member 14 welded to the inner side of the side wall 11 of the intermediate beam 10, and the base of the side wall 18 of the inner beam 17 contacts the inner side of the side wall 11 of the intermediate beam 10. The signal is transmitted to the intermediate beam 10 by contacting the horizontal upper surface of the receiving member 15 provided at the bottom near the end. The horizontal upper surface of the member 12 on the outside of the base of the side wall 11 of the intermediate beam 10 comes into contact with the horizontal lower surface of the receiving member 6 welded to the inner end of the side wall 5 of the horizontal base tube 4. It is transmitted to the side wall 5 portion, and further transmitted to the vehicle body frame 1 side to which the horizontal base cylinder 4 is welded via the cylindrical arm 7.

In addition, in this embodiment, the members 19, 20, 21 are attached to the outer central part of the side wall 18 of the inner beam 17, and the members 12, 13
and the receiving member 14 are welded to the inner and outer central parts of the side wall 11 of the intermediate beam 10, and the receiving member 6 is welded to the inner central part of the side wall 5 of the horizontal base @4, so that the inner beam 1
In transmitting the supporting force P acting on the ground plate 25 of the telescopic support leg 23 at the 7th end to the vehicle body frame 1, the said member 12.13
゜19.20.21 and side wall 5゜1 of receiving member 6.14 etc.
By welding 1.15 to the inner and outer central portions, not only the respective side wall portions are reinforced, but also the horizontal base cylinder 4. The transmission of the bearing force P between the intermediate and inner beams 1017 takes place at the center of the inner and outer sides of each of the side walls 5.11.18. Especially notch 1
6, the horizontal base cylinder 4 and the side walls 5 and 11 of the intermediate beam 10, which have openings at the ends of their top walls, are transmitted at the tops of their side walls to transmit the component force that attempts to expand them outward. It is considerably reduced compared to

In addition, in the case where the inner beam 17 is extended.

The overlapped portion between the base of the inner beam 17 and the end of the intermediate beam 1o, and the overlap between the base of the intermediate beam 10 and the end of the horizontal base cylinder 4 (
Around this end, for example,
The length of the overlapping portion with the horizontal base cylinder 4 (a casing-like member as described in the above publication may also be provided) is
A receiving member 6 is placed inside the end of the side wall 5 of the intermediate beam 10, and the side 8 of the intermediate beam 10 is
! A receiving member 14 is welded to the inside of each end of 11, and
A conventional example in which the outrigger is simply made into a multi-stage telescope type (
For example, see Japanese Patent Application Laid-Open No. 51-4729).
When the inner beam 17 is extended, the length of the overlapping portion with the support portion can be made considerably shorter, and the structure is simplified, so that the outrigger having the required amount of overhang can be made without increasing its weight. It can be provided without any problem.

Further, in FIG. 1, an example is shown in which the receiving member 15 having a horizontal upper surface is welded near the inner side of the end of the side wall of the intermediate beam 10, and the member 22 is welded to the outer lower part of the base of the side wall 18 of the inner beam 17. Proximal end of inner beam 17 and intermediate beam 10
If the bottom wall of the intermediate beam 10 can receive the force of contact with the bottom wall, the receiving member 15 and the contact member 22 can be omitted.

In FIG. 1, receiving members 19, 21, and 20 are installed at three locations in the upper and lower center of the outside of the side wall 18 of the inner beam 17, at both ends in the length direction (left and right in FIG. 1), and at the center. Although an example in which the receiving members 20 at the intermediate portion are provided at intervals is shown, a plurality of receiving members 19 and 21 at both ends may be provided at equal intervals (not shown). As the number of receiving members 20 increases, the inner beam 17 is extended in multiple stages relative to the horizontal base cylinder 4 and/or the intermediate beam 10, and the inner beam 17 is extended to a width that is optimal for the topography of the cargo handling work area. , can support the vehicle body frame l.

Although not shown, in the case of an outrigger such as a truck crane, it is desirable to specify the extension interval of the telescopic support legs 23 of the outrigger, such as when a location where cargo handling operations are frequently performed by the truck crane is specified. Part 2
0 can be arranged close to either the receiving member 19 or 21.

In addition, in this embodiment, the intermediate beam 10 shown in FIG.
The horizontal upper surface of 21 can also be brought into contact with the horizontal lower surface of the receiving member 6 welded to the inside of the side wall end of the horizontal base 4.

In addition, in the above description, an example was shown in which the cylinder 24 of the telescopic support leg 23 is provided at the end of the inner beam 17 so that its top protrudes higher than the top wall of the inner beam 17. The top of the cylinder 24 may be provided at the end of the inner beam 17 such that it is lower than the top wall of the inner beam 17, in which case a notch 16. 8 is not necessary.

(Second Embodiment) Next, a second embodiment of the outrigger for a special vehicle according to the present invention will be described with reference to FIG. 9, which shows a side view of an inner beam forming a main part thereof. Note that the same names and symbols are used for parts common to the first embodiment shown in FIGS. 1 to 8.

27 is an inner beam, 28 is a side wall thereof, and 29 is a band-shaped abutting member welded along the entire length of the outside of the side wall 28. The band-like abutting member 29 has a horizontal upper surface and a horizontal lower surface.

This inner beam 27 is slidably inserted in place of the inner beam 17 into the intermediate beam 1o in the horizontal base cylinder 4 disposed below the vehicle body frame 1 shown in FIG. By extending the telescopic support leg 23 provided by the hydraulic cylinder 24, the ground plate 25 is grounded, and the reaction force is transferred to the horizontal upper surface of the band-shaped contact member 29 welded to the outside of the side wall 28 of the inner beam 27, and the intermediate Side wall 11 of beam 10
The signal is transmitted by contact with the horizontal lower surface of the receiving member 14 at the inner end, and is further transmitted to the vehicle body frame 1 side via the horizontal base 4 and the restraint arm 7.

Although a band-shaped contact member 29 is welded to the outside of the side wall 28 of the inner beam 27 over its entire length, the inner beam 27 is Some nine parts of the horizontal upper surface of the band-shaped contact member 29 welded to the outer side of the side wall 28 of 17 abut against the horizontal lower surface of the receiving member 13 at the inner end of the side wall 11 of the intermediate beam 10.

The rest of the structure, functions, etc. are substantially the same as those of the first embodiment.

(Effects of the Invention) Since the present invention has the above-described structure and operates, the following effects can be obtained.

(1) A horizontal upper surface attachment member is welded to the outer side of the side wall of the inner beam, and a horizontal lower surface attachment member that abuts the horizontal upper surface of the member is welded to the inner side of the intermediate beam side wall. Since it is supported by the horizontal lower support member welded to the inside of the side wall end of the horizontal base tube, with or without the lower support member, transmission of bearing force between the inner beam and the horizontal base tube and/or intermediate beam is possible. , the stress is distributed and transmitted to the side wall of the opposing horizontal base cylinder and/or intermediate beam via the welded portion between the horizontal upper surface attaching member or the horizontal lower surface attaching member and its side wall, and therefore stress concentration at the transmitting portion. degree decreases.

(2) Since the transmission force at the abutting portions of the inner beam and the intermediate beam and/or the horizontal base tube is transmitted in a distributed manner, and the stress concentration is reduced compared to the conventional example, the conventional example There is no need to provide a reinforcing band, the inner beam can be completely accommodated within the horizontal base tube and/or the middle beam, and the inner beam can be fully extended during the maximum extension than the conventional example with the same minimum outrigger width. The width of the reinforcing band increases accordingly.

The maximum non-overturning moment is increased by a corresponding amount, and the cargo handling stability of the special vehicle is improved.

(3) The bearing force between the inner beam and the horizontal base cylinder and/or the intermediate beam is transmitted via the horizontal upper surface attachment member and horizontal lower surface attachment member welded to the outside or inside of those side walls, It becomes easy to form a notch on the upper side of the end of the horizontal base cylinder and/or the intermediate beam, and as a result, the inner beam having the telescopic support leg at the end of which the top of the cylinder projects highly upward can be formed into the horizontal base cylinder and/or the intermediate beam. The degree of freedom in designing the outrigger, which can be completely stored within the beam, is improved.

(4) By welding a plurality of horizontal upper surface attaching members at appropriate intervals in the length direction on the outside of the inner beam side wall, the inner beam can be extended from the vehicle body frame without increasing the weight of the inner beam. Adjust the inside.

It can be made into multiple stages corresponding to the number of horizontal upper surface attachment members.

(5) If a horizontal upper surface attachment member is welded to the outside of the side wall of the inner beam along its entire length, the inner beam can be extended from the horizontal base cylinder of the outrigger.

It can be adjusted to provide optimal conditions depending on the topography of the work place.

(6) An auxiliary support member with a horizontal lower surface is welded to the base end lower part of the outer side wall of the inner beam to which the horizontal upper surface abutment member is welded, and at the same time, an auxiliary member with a horizontal lower surface is welded to the inner lower part of the side wall of the horizontal base cylinder and/or the intermediate beam. Then, by welding a horizontal upper surface supporting member that engages with the horizontal lower surface of the auxiliary member welded to the outer lower part of the base end of the side wall of the inner beam at a position spaced a short distance inward from the end edge. , at the time of extension of the inner beam, where the maximum non-overturning moment of the special vehicle occurs. Since the auxiliary abutting member welded to the outside of the base end of the side wall of the inner beam and the auxiliary receiving member welded to the lower edge near the end of the side wall of the horizontal base tube and/or the intermediate beam are received in contact with each other, the inside There is no direct engagement between the lower part of the base end of the beam and the horizontal base tube groove or the intermediate beam bottom wall, the transmission force between them is dispersed, stress concentration on the turning part does not occur, and the horizontal base tube has the same rigidity. In particular, the bottom wall of the U-shaped receiving member disposed at its end or at the end of the horizontal base cylinder can be made thinner than in the conventional example.

[Brief explanation of drawings]

The drawings show an embodiment of the outrigger for a special vehicle according to the present invention, and FIG. 1 is a front explanatory view of the main part of the first embodiment, and FIGS. 2, 3, and 4 are the same as those in FIG. ■-■ line sectional view, m-m1 sectional view and rV-IV line arrow view, 5th
FIG. 6 is a plan view of the horizontal base cylinder and the end of the intermediate beam;
Figure 7 is an enlarged explanatory view of the D section in Figure 1, and Figure 8 is the ■■ in Figure 7.
9 is a side view of the inner beam forming the main part of the second embodiment of the present invention. l...Vehicle frame, 4...Horizontal base tube. 5.11.18.28...Side wall. 6.14...Receptacle member, 10...
・Intermediate beam, 12.13.19...This member. 15...Auxiliary receiving part member, 17.27...Inner beam, 20.21...This member, 22...
- Auxiliary contact member, 29... Band-shaped contact member. Fig. 5 Fig. Fig. 24^ Fig. Telescopic support leg

Claims (4)

[Claims] (1) Inside a horizontal base cylinder with a rectangular cross-section fixed to the lower side of the vehicle body frame, an inner beam with the same cross-section and a support leg at the end is installed, with or without an intermediate beam with the same cross-section. In the outrigger for a special vehicle made of 1. An outrigger for a special vehicle, characterized in that a horizontal upper surface attaching member is welded to the inner side of a side wall end of a beam to engage with a horizontal lower surface of a receiving member. (2) Claim (1) characterized in that a plurality of horizontal upper surface attachment members provided on the outside of the side wall of the inner beam are provided at appropriate intervals in the length direction of the inner beam.
Outriggers for the special vehicles listed. (3) Welding an auxiliary support member with a horizontal lower surface to the base end lower part of the outer side wall of the inner beam to which the horizontal upper surface support member is welded, and at the same time, welding the horizontal lower surface attachment member to the lower part of the inner side of the side wall of the horizontal base tube and/or the intermediate beam. and a horizontal upper surface supporting member that engages with the horizontal lower surface of the auxiliary member welded to the outer lower part of the base end of the side wall of the inner beam is welded at a position spaced a short distance inward from the end edge thereof. The outrigger for a special vehicle according to claim (1), characterized in that: (4) Claim (1) characterized in that a horizontal upper surface attaching member is welded along the entire length of the outer side of the inner beam side wall.
Outriggers for the special vehicles listed.