JP2000178916A - Paving machine having extension frame mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a space in the direction of the car width compact in a state that an extension frame is being folded. SOLUTION: A paving machine having an extension frame mechanism is equipped with a bearing frame 22 provided in the machine 2 having a front wheel and a rear wheel 18 and an extension frame 24 borne by the bearing frame 22. Then, the extension frame 24 is borne by the bearing frame 22 between a using position extended outward from the machine side and a folding position extended forward along the machine side in a turnable manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement machine such as an asphalt finisher having an extension frame mechanism, and more particularly to a so-called wheel-type pavement machine having wheels.

[0002]

2. Description of the Related Art Conventionally, pavement machines such as asphalt finishers have been used for road paving and the like.
Asphalt finisher, a typical example of paving equipment,
A hopper disposed at the front of the machine for receiving asphalt mixture, a mixture transport device for transporting the asphalt mixture in the hopper to the rear of the machine, and a mixture transport device disposed at the rear of the machine Screw that spreads and discharges the asphalt mixture transported on the road surface, and compacts the asphalt mixture that is placed behind the conveyor screw and spread on the road surface with the conveyor screw and smoothes the surface And a screed device for finishing. The construction width of a road paved using an asphalt finisher varies, and the construction width may change during construction. In order to cope with such a situation, the screed device is generally provided with an actual pavement between a standard screed width corresponding to approximately the vehicle width and a maximum screed width which is overhanged (extended) as far as possible outside the vehicle width. The screed width is set to an appropriate value corresponding to the width. In the case of setting a screed device to a maximum screed width and performing road pavement, for example, it is necessary to uniformly spread the asphalt mixture discharged by the conveyor screw to the tip of the stretched screed device. For this purpose, an extension frame is mounted on the side of the machine in front of the conveyor screw.

As is apparent from the above description, the extension frame is necessary when the road is paved by extending the screed device, but is not required when the road is paved with the standard screed width. . Also, when transporting and moving the asphalt finisher (when moving other than paving work), it is necessary to keep the vehicle width within the legal width. For this reason, in the conventional track type asphalt finisher, the extension frame is attached to the side of the machine via hinge means, and when used, a stay provided between the extension frame and the side of the machine is used. It is used to hold the extension frame in a use position, and when not in use, to hold the stay and extension frame in a folded position extending along the sides of the machine. The holding of the extension frame in the folding position is performed by holding the stay detachably on a holding member arranged on the side of the machine.

[0004]

In the above-mentioned conventional extension frame mechanism, a holding member for holding the extension frame at the folding position needs to be disposed on the side of the machine. When the extension frame is held in the folded position, the stay is positioned between the side of the machine and the extension frame. Relatively large. In the track type asphalt finisher, a relatively large extra space in the vehicle width direction can be secured, so that the above-mentioned conventional extension frame mechanism can be used, but in the case of a large wheel type asphalt finisher, a large diameter is used. Since the rear wheels are located on the left and right near the rear of the machine and close to the legal vehicle width, the extra space in the vehicle width direction is narrow, and the above extension that can be used in the track type asphalt finisher The frame mechanism cannot be used. For this reason, in the extension frame mechanism used for the wheel-type asphalt finisher, the extension frame has to be detachable, and it is necessary to perform a detaching operation as needed. As a result, relatively large labor and time are required for attaching and detaching the extension frame, and as a result, the efficiency of road pavement is reduced. In addition, a space for storing the detached extension frame is required. Further, there is a possibility that a so-called detached part may be lost and handling becomes difficult. Further, an extension frame connection portion (for example, extension) There is a problem that the asphalt mixture adheres to the frame fixing pin holes and the like, making it difficult to attach and detach.

[0005] The present invention has been made based on the above facts, and an object of the present invention is to enable folding along the side of the machine with the extension frame attached thereto, and to provide a space in the vehicle width direction in the folded state. Is to provide a pavement machine having an improved extension frame mechanism that can make the pavement compact.

Another object of the present invention is to provide an improved extension in which the operation of selectively positioning the extension frame between the use position and the folding position is easy, and the efficiency of road pavement construction can be improved. An object of the present invention is to provide a pavement machine having a frame mechanism.

Still another object of the present invention is to provide an improved pavement construction efficiency by eliminating the need for attaching and detaching the extension frame, thereby eliminating the burden and time for attaching and detaching the extension frame. To provide a paving machine having an extended frame mechanism.

It is yet another object of the present invention to provide a pavement machine having an improved extension frame mechanism that does not require so-called detached parts and is therefore easy to handle.

Yet another object of the present invention is to provide a pavement machine having an improved extension frame mechanism that does not cause asphalt mixture to adhere to the connection portions of the extension frame.

It is yet another object of the present invention to provide a pavement machine having an improved extension frame mechanism that is easy to assemble and disassemble.

Other objects and features of the present invention will become apparent from the following description of embodiments of a paving machine having an extension frame mechanism configured according to the present invention, with reference to the accompanying drawings. Would.

[0012]

According to the present invention, there is provided a support frame disposed on a machine having wheels, and an extension frame supported on the support frame, wherein the extension frame is provided with a machine. An extract supported on the support frame so as to be pivotable between a use position extending outward from a side portion and a folded position extending forward along the machine side portion. A paving machine having a tension frame mechanism is provided.

[0013] A support guide is provided on the support frame so as to extend in the machine width direction, and a support guide is provided on the extension frame so as to extend in the longitudinal direction thereof. A lock member is retractably engaged with and extended from the support guide portion, and the lock member is stored in the support guide portion of the support frame so that the use position and the folding position of the extension frame are adjusted. The extension frame is allowed to rotate by extending the lock member from the support guide portion of the support frame and engaging a part of the lock member with the support guide portion of the extension frame. Preferably, it is locked in the use position. The extension frame is releasably locked in the folding position, and simultaneously the lock member is releasably locked in a state of being stored in the support guide portion of the support frame, and the extension frame is locked in the use position. The locking member extends from the support guide of the support frame and a part thereof is engaged with the support guide of the extension frame to lock the lock member to the support frame. It is preferable that a lock means for releasably locking the support guide portion is provided. It is preferable that an auxiliary extension frame is detachably attached to an end of the extension frame in the extension direction. The wheels include a rear wheel located at the rear of the machine, the support frame is located proximate to the rear of the rear wheel, and when the extension frame is positioned in the folded position, the extension frame is It preferably extends close to the outside of the rear wheel.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an asphalt finisher which is a so-called wheel type pavement machine having an extension frame mechanism constructed according to the present invention will be described below in detail with reference to FIGS. In FIGS. 1 to 7, substantially the same parts are denoted by the same reference numerals.
First, referring to FIG. 1, an asphalt finisher is disposed at a front portion (a lower portion in FIG. 1) of a machine 2, and receives a hopper 4 for receiving an asphalt mixture (not shown) and an asphalt mixture in the hopper 4 into the machine 2. A bar conveyor 6 which is a mixture transport device for transporting the mixture to a rear portion (an upper portion in FIG. 1), and an asphalt mixture disposed at a rear portion of the machine 2 and conveyed by the bar conveyor 6 while spreading the mixture on a road surface. A conveyor screw 8 to be discharged and a screed device 10 for compacting and smoothing the surface of the asphalt mixture disposed behind the conveyor screw 8 and spread on the road surface by the conveyor screw 8
And At the front of the machine 2, small-diameter wheels (front wheels) 12 are mounted on the left and right below the hopper 4.
At the rear of the machine 2, a driver seat 14 and an auxiliary seat 16 are disposed above the conveyor screw 8.
Also, large-diameter wheels (rear wheels) 18 are mounted on the left and right of the lower position near the auxiliary seat 16. The asphalt finisher is moved forward (in the direction of arrow A) in FIG. 1 by an engine (not shown) so as to be able to construct a required road pavement. The asphalt finisher itself may have a well-known configuration, and does not itself constitute a feature of the present invention, and thus detailed description is omitted.

In the asphalt finisher, extension frame mechanisms 20 are provided at both sides of a rear portion of the machine 2. Extension frame mechanism 2
Each of the extension frames 0 has substantially the same configuration. Therefore, here, the extension frame mechanism 20 disposed at the right side position (the left side position in FIG. 1) in the traveling direction of the asphalt finisher will be representatively described.

Referring to FIGS. 2 to 5, the extension frame mechanism 20 includes a support frame 22 extending in the width direction of the machine 2, and extends outward from a side of the machine 2 in front of the conveyor screw 8. And an extension frame 24 supported on a support frame 22 so as to be pivotable between a use position and a folding position extending forward along the side of the machine 2.

With particular reference to FIG.
Is composed of a rectangular flat plate member and a part of the rear wall of the vehicle body 2a. The support frame 22 is also arranged close to the rear of the large-diameter rear wheel 18. A pair of hinge pins 26 and 28 extending vertically in the front end of the support frame 22 (the surface in the forward direction of the machine 2) at one end thereof with an interval in the vertical direction, and extending in the width direction of the machine 2. Support guide 30 arranged to be present
And are provided. A pair of support block members 26 are vertically spaced from each other at one end of the support frame 22.
a and 28a are fixed, a part of the outer peripheral surface of the lower end of the hinge pin 26 is fixed to the support block member 26a,
A part of the outer peripheral surface at the lower end of the hinge pin 28 is fixed to the support block member 28a. The hinge pins 26 and 28 are on a common axis (in the embodiment, on a vertical axis).
It is positioned in. The support guide portion 30 includes a pair of side walls 32 and 34 extending in parallel at intervals in the vertical direction.
And the other end of the side walls 32 and 34 of the support channel member 38 composed of the bottom wall 36 disposed so as to cover one end of the side walls 32 and 34 is fixed to the front surface of the support frame 22. A locking hole 32 is provided at one end of the side wall 32.
a is formed. On the front surface of the support frame 22, near the vehicle body 2a on the outer side in the radial direction of the upper hinge pin 26, a lock piece 39 is disposed upright from the front surface. The lock piece 39 is a support channel member 38
Are arranged at intervals above one end of the side wall 32. A lock hole 39a is formed in the lock piece 39 formed of a rectangular plate member. Lock hole 3 of lock piece 39
9a and locking hole 32 in side wall 32 of support channel member 38
“a” is arranged on a common axis.

Referring particularly to FIG. 5, the extension frame 24 is formed of a rectangular flat plate member. The front of the extension frame 24 (Machine 2
Of the hinge pipes 40 and 42 extending in the up-down direction at one end thereof and extending between the one end and the other end. And a support guide portion 44 provided. A pair of support block members 40a and 42a are fixed to the one end of the extension frame 24 at an interval in the vertical direction, a part of the outer peripheral surface of the hinge pipe 40 is fixed to the support block member 40a, and the hinge A part of the outer peripheral surface of the pipe 42 is fixed to the support block member 42a.
The overall length of the hinge pipe 40 in the axial direction and the length of the support block member 40a (the length in the vertical direction in FIG. 5) are substantially the same. The length of the hinge pipe 42 in the axial direction and the length of the support block member 42a (the length in the vertical direction in FIG. 5) are substantially the same. The hinge pipes 40 and 42 are arranged on a common axis.

The support guide 44 is a support channel member comprising a pair of side walls 46 and 48 extending in parallel at a distance from each other and a bottom wall 49 disposed to cover one end of the side walls 46 and 48. The other end of the side walls 46 and 48 of 50 is fixed to the front surface of the extension frame 24. Near one end of the side walls 46 and 48 (FIG. 5)
At the right end) are the locking holes 46a and 48
a is formed. Locking holes 46b and 48b are formed near the other ends of the side walls 46 and 48 (near the left end in FIG. 5). The locking holes 46a and 48a are arranged on a common axis, and the locking holes 46b and 48b are arranged on a common axis. The bottom wall 49 of the support channel member 50 is formed with a notch 49a extending a predetermined length from one end of the pair of hinge pipes 40 and 42 toward the other end. Notch 49
a extends to the terminal end 49b with a constant width. On the front surface of the extension frame 24, near the radial outer side of the upper hinge pipe 40, a lock piece 52 is disposed upright from the front surface. On the front surface of the extension frame 24, between the lock piece 52 and the support channel member 50, another lock piece 54 is disposed upright from the front face. The locking pieces 52 and 54 spaced from each other have substantially the same shape, and the locking pieces 54 are positioned so as not to interfere with the virtual extension of the outer peripheral surface of the hinge pipes 40 and 42 (in the embodiment, It is positioned with its one side almost touching.) In some embodiments, one of the lock pieces 52 and 54 (for example, the lock piece 54) is omitted. Locking holes 52a and 54a are formed in the lock pieces 52 and 54, respectively. The locking holes 52a and 54a are arranged on a common axis. A lock pin 58 is attached to the lock piece 52 via a chain 56 which is an elongated connecting means that can be displaced in any direction. The lock pin 58 has a head 58a at one end, and the chain 56 is connected to one end on the head 58a side.

With particular reference to FIG.
The lock member 60 is movably engaged with the second support channel member 38. The lock member 60 has a channel shape including a pair of side walls 62 and 64 extending in parallel at an interval from each other and a bottom wall 66 disposed to cover one end of the side walls 62 and 64. Side walls 62 and 64
Are formed with locking holes 62a and 64a (not shown) at one end. The locking holes 62a and 64a are arranged on a common axis. At one end in the longitudinal direction of the lock member 60, an operation piece 68 extends so as to be orthogonal to the longitudinal direction, and has one end protruding outside the bottom wall 66 and the other end at the bottom wall 6.
6 are arranged to protrude inside. The operation piece 68 is formed of a rectangular plate member.

Referring to FIGS. 2 to 5, the lock member 60 configured as described above is engaged with the support channel member 38 of the support frame 22 so as to be movable and detachable, that is, retractable and extendable. Is done. By inserting the lock member 60 into the support channel member 38, the lock member 60 can be positioned at a storage position (see a two-dot chain line in FIGS. 2 and 3) in which substantially the entire longitudinal direction is stored. The storage position of the lock member 60 is such that the operation piece 68 is
Is abutted against one end of the support channel member 38 in the longitudinal direction to prevent the lock member 60 from moving with respect to the support channel member 38.

With the lock member 60 positioned at the storage position, the extension frame 24 moves the hinge pipe 40 to the hinge pin 26 of the support frame 22.
By fitting the hinge pipe 42 to the hinge pin 28 from above, the folding position (the position shown by a two-dot chain line in FIG. 3) and the use position (the solid line in FIGS. 2 and 3) Position). This turning is allowed by positioning the lock member 60 in the storage position. When the hinge pipes 40 and 42 of the extension frame 24 are pivotally fitted to the hinge pins 26 and 28 of the support frame 22, the lower end surfaces of the hinge pipes 40 and 42 become the support block members 26 at the hinge pins 26 and 28.
The extension frame 24 is mounted on the upper end surfaces of the extension frames 24a and 28a, and is supported by the support frame 22 so as to be pivotable and detachable. This fitting / supporting operation is performed simply by aligning the hinge pipes 40 and 42 of the extension frame 24 with the hinge pins 26 and 28 of the support frame 22 and moving it downward, so that it can be performed easily and quickly. it can. The structure in which the lock member 60 is detachably engaged with the support channel member 38 of the support frame 22 and the extension frame 24 is detachably supported on the support frame 22 is assembling and disassembly of the extension frame mechanism 20. Make work easier.

When the extension frame 24 is pivoted to the use position, the support channel member 50 of the extension frame 24 is linearly aligned with the support channel member 38 of the support frame 22. When the lock member 60 is moved from the storage position by the operation piece 68 in this aligned state, a part of the lock member 60 in the longitudinal direction is movably and detachably engaged with the support channel member 50 of the extension frame 24. . As a result, the lock member 60 is connected to the support channel member 38 of the support frame 22.
The extension frame 24 is locked at a locking position straddling the support channel member 50 of the extension frame 24, so that the extension frame 24 is prevented from turning from the use position and locked. When the lock member 60 is moved to the lock position as described above, the operation piece 68 is moved along the notch 49 a formed in the bottom wall 49 of the support channel member 50 of the extension frame 24. The lock position of the lock member 60 is defined by the operation piece 68 abutting on the terminal end 49b of the notch 49a to prevent the lock member 60 from moving with respect to the support channel member 50. Thus, the extension frame 24 can be easily and quickly moved to the use position by a simple operation (operation) of merely moving the lock member 60 stored in the support channel member 38 of the support frame 22 to the lock position by the operation piece 68. It can be locked securely.

When the extension frame 24 is positioned at the use position and the lock member 60 is positioned at the lock position, the locking holes 62 of the lock member 60 are provided.
a and 64a are positioned (aligned) on a substantially common axis with the locking holes 46a and 48a of the support channel member 50 of the extension frame 24. Then, the lock member 60 is locked by the support channel member 50 and the extension frame 24 is used by penetrating the locking holes 46a, 62a, 64a and 48a in that order from above and removably inserting the lock pin 58. It is releasably locked at the position (the state shown by the solid line in FIGS. 2 and 3). As described above, the lock of the lock member 60 with respect to the support channel member 50 can be easily, quickly, and reliably performed by a simple operation of merely inserting the lock pin 58 into each of the locking holes from above.

The operation of positioning the extension frame 24 from the use position to the folding position is performed as follows. First, the lock pin 58 is pulled out upward from each of the locking holes. Next, the lock member 6 is operated by using the operation piece 68.
0 is moved from the lock position to the storage position. As a result, the extension frame 24 is free to pivot with respect to the support frame 22, so that the extension frame 24 is pivoted counterclockwise in FIG. 3 and pivoted to the folding position indicated by the two-dot chain line in FIG. When the extension frame 24 is pivoted to the folded position, the lock pieces 52 of the extension frame 24 are positioned just above the lock pieces 39 of the support frame 22 with an interval, and the lock pieces 52 of the extension frame 24 are It is positioned below the locking piece 39 of the support frame 22 and above the support channel member 38 at intervals. And extension frame 2
4 locking pieces 52 and 54, locking holes 52a and 54a
Are locking holes 39a of the lock pieces 39 of the support frame 22,
Each of the locking holes 32a of the support channel member 38 and at least one of the locking holes 62a and 64a (the locking holes 62a in the embodiment) of the locking member 60 is positioned (aligned) on a substantially common axis. ). In this state, the lock member 60 is locked to the support channel member 38 by penetrating the locking holes 52a, 39a, 54a, 32a, and 62a in this order from above and removably inserting the lock pin 58, thereby extending the extension. The frame 24 is releasably locked at the folding position. When the extension frame 24 is positioned in the folded position, the extension frame 24 is positioned to extend close to the outside of the rear wheel 18. As described above, the extension frame 24 is locked at the folding position by the lock pin 58.
Can be easily, promptly and reliably performed by a simple operation of simply inserting the above into each of the locking holes from above. Further, by pulling out the lock pin 58 upward from each of the locking holes, the extension frame 24 can be easily positioned at the use position.

As is apparent from the above description, the locking holes 39a of the locking pieces 39 of the support frame 22, the locking holes 32a of the side walls 32 of the support channel member 38, and the locking pieces 52 and 54 of the extension frame 24. Holes 52a and 54a, sidewalls 46 and 48 of support channel member 50
Locking holes 46a and 48a, side wall 62 of locking member 60
The locking holes 62a and 64a (not shown) of the locking frame 58 and the locking pin 58 constitute locking means disposed between the support frame 22 and the extension frame 24. This locking means is provided by the extension frame 24.
At the same time as the lock member 60 is stored in the supported guide portion 30, and the lock member 60 is locked with a part of the lock member 60 engaged with the support guide portion 44. 60 is releasably locked to the support guide 44.

Since the extension frame mechanism 20 is configured as described above, the extension frame 24 can be folded along the side of the machine 2 with the extension frame 24 attached to the support frame 22, and the extension frame 24 can be folded. In the folded state, between the extension frame 24 and the side of the machine 2, in the embodiment, between the extension frame 24 and the outside of the large-diameter rear wheel 18, a stay or holding member as in a conventional mechanism is provided. Does not exist, and the extension frame 24 can be extended close to the outside of the rear wheel 18.
The space in the vehicle width direction can be made compact, so that it can be kept within the legal vehicle width, which is extremely useful in practice. In particular, since the extension frame 24 is folded with the locking member 60 stored in the support channel member 38, there is no member between the extension frame 24 and the outside of the rear wheel 18, and therefore, This greatly contributes to downsizing of the space in the vehicle width direction. The support frame 22
Are arranged close to the rear portion of the rear wheel 18, so that the space in the front-rear direction when the extension frame 24 is folded can also be made compact. In addition, the operation of selectively positioning the extension frame 24 between the use position and the folding position (operation for simply performing the simple operations of inserting and removing the lock pin 58, moving the lock member 60, and turning the extension frame 24). ) Is easy, and the construction efficiency of road pavement can be improved. Furthermore, there is no need to attach / detach the extension frame 24 to / from the support frame 22 each time it is used or not used as in the prior art, and there is no need to change the state of attachment, so that labor for attaching / detaching By eliminating the burden and time of the construction, the construction efficiency of road pavement can be improved.
Furthermore, it does not require so-called remote parts and is therefore easy to handle. Furthermore, since the connection portion (the fitting portion between the hinge pins 26 and 28 and the hinge pipes 40 and 42) of the extension frame 24 is normally kept in a connected state, the asphalt mixture is prevented from adhering. Also, there is no problem that attachment and detachment becomes difficult in maintenance and the like.

FIGS. 6 and 7 show the auxiliary extension frame 7 at the other end of the extension frame 24.
An embodiment is shown in which 0 is detachably mounted. As shown in FIG. 5, an auxiliary extension frame 70 composed of a substantially rectangular flat plate member includes:
If the supported guide portion 71 is the auxiliary extension frame 70
Is provided so as to extend in the longitudinal direction and partially project from one end of the auxiliary extension frame 70. The supported guide portion 71 includes a supported channel member 72 composed of a pair of side walls 74 and 76 extending in parallel at a distance from each other and a bottom wall 78 disposed to cover one end of the side walls 74 and 76. And a part of the other end of each of the side walls 74 and 76 is fixed to one surface of the auxiliary extension frame 70. Engagement holes 74a and 76a are formed at portions of the side walls 74 and 76 near one end. The locking holes 74a and 76a are arranged on a common axis. A lock pin 80 is attached to the side wall 74 via a chain 79 which is an elongated connecting means that can be displaced in any direction. The lock pin 80 has a head 80a at one end, and the chain 79 is connected to one end on the head 80a side.

The auxiliary extension frame 70 movably and removably engages a portion of the supported channel member 72 protruding from one end of the auxiliary extension frame 70 with the support channel member 50 of the extension frame 24. Thereby, the extension frame 24 is attached to the other end (the end in the extension direction of the extension frame 24). This mounting is easily, quickly and reliably performed by a simple operation of inserting the supported channel member 72 of the auxiliary extension frame 70 from the tip of the support channel member 50 of the extension frame 24. The mounting position of the auxiliary extension frame 70 with respect to the extension frame 24 is defined by one end of the auxiliary extension frame 70 abutting on the opposite end of the extension frame 24 to prevent further movement.
The auxiliary extension frame 70 is positioned substantially on an extension of the extension frame 24. When the auxiliary extension frame 70 is mounted on the extension frame 24, the locking holes 74 a and 76 a of the supported channel member 72 of the auxiliary extension frame 70
Are positioned (aligned) on a substantially common axis with the locking holes 46b and 48b of the support channel member 50 of FIG.
Then, the lock pin 80 is connected to the locking holes 46b, 74.
The auxiliary extension frame 70 is releasably locked to the extension frame 24 by inserting the a, 76a, and 48b in that order from above and removably. Locking hole 46b of support channel member 50
And 48b, locking hole 74a of supported channel member 72
And 76a, and the lock pin 80, the supported guide portion 71
By locking the protruding portion of the auxiliary extension frame 70 to the support guide portion 44, a locking means for releasably locking the auxiliary extension frame 70 to the extension frame 24 is constituted. The auxiliary extension frame 70 thus attached to the extension frame 24
Can be easily, quickly and reliably performed by a simple operation of inserting the lock pins 80 into the respective locking holes from above. By pulling out the lock pin 80 from each of the locking holes, the auxiliary extension frame 70 can be easily removed from the extension frame 24. The auxiliary extension frame 70 is prepared in case of a screed width that cannot be dealt with only by the extension frame 24, and is mounted as necessary.

As described above, the present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and can be variously modified or modified within the scope of the present invention. For example, in the embodiment described above, the hinge pins 26 and 28 of the support frame 22 are arranged on a common axis, and this axis substantially coincides with the vertical axis, but this axis is slightly inclined in the front-rear direction of the asphalt finisher. In some embodiments, the body portion behind the large-diameter rear wheel 18 approaches the large-diameter rear wheel 18 to reduce the axial load of the large-diameter rear wheel 18. In the case of this embodiment, the extension frame 24 supported by the support frame 22 is also mounted to be inclined in the front-rear direction according to the inclination of the axis. Although the lock pin 58 is attached to the lock piece 52 of the extension frame 24 via the chain 56, there is an embodiment in which the lock pin 58 is attached to another portion of the extension frame 24 or an appropriate portion on the support frame 22 side. The extension frame mechanism 20 is applied to a wheel-type pavement machine represented by a wheel-type asphalt finisher, but it goes without saying that the extension frame mechanism 20 is also applied to a crawler-type pavement machine.

[0031]

According to the pavement machine having the extension frame mechanism constructed in accordance with the present invention, the pavement machine can be folded along the side of the machine with the extension frame mounted, and in the vehicle width direction in the folded state. Space can be made compact. In addition, the work of selectively positioning the extension frame at the use position and the folding position is easy, and the construction efficiency of road pavement can be improved. Furthermore, there is no need to attach and detach the extension frame, and therefore, the efficiency and efficiency of road pavement construction can be improved by eliminating the labor and time for attaching and detaching the extension frame. Furthermore, it does not require so-called remote parts and is therefore easy to handle. Furthermore, asphalt mixture does not adhere to the connection part of the extension frame,
There are no problems that make attachment and detachment difficult. Furthermore, assembly and disassembly are easy.

[Brief description of the drawings]

FIG. 1 is a schematic top view illustrating an embodiment of a wheeled asphalt finisher having an extension frame mechanism configured in accordance with the present invention.

FIG. 2 is a view of one of the extension frame mechanisms in the wheel type asphalt finisher having the extension frame mechanism shown in FIG. 1 when viewed from the direction of arrow B in FIG. 1;

FIG. 3 is a view of the extension frame mechanism shown in FIG. 2 as viewed from above in FIG. 2;

FIG. 4 is an exploded perspective view of a support frame and a lock member included in the extension frame mechanism shown in FIGS. 2 and 3;

5 is an exploded perspective view of an extension frame and an auxiliary extension frame included in the extension frame mechanism shown in FIGS. 2 and 3. FIG.

FIG. 6 is a view showing an embodiment in which an auxiliary extension frame is mounted on the extension frame shown in FIG. 2, and is a view similar to FIG. 2;

FIG. 7 is a view of the extension frame mechanism shown in FIG. 6 as viewed from above in FIG. 6;

[Explanation of symbols]

2 Machine 8 Conveyor Screw 10 Screed Device 18 Large Diameter Wheel 20 Extension Frame Mechanism 22 Support Frame 24 Extension Frame 26, 28 Hinge Pin 30, 44 Support Guide 32a, 39a, 46a, 48a, 52a, 54a, 6
2a Lock hole 38, 50 Support channel member 39, 52, 54 Lock piece 40, 42 Hinge pipe 49a Notch 58, 80 Lock pin 60 Lock member 68 Operation piece 70 Auxiliary extension frame 71 Supported guide

Claims (9)

[Claims] 1. A support frame disposed on a machine having wheels, and an extension frame supported by the support frame, wherein the extension frame extends outward from a side of the machine. A paving machine having an extension frame mechanism, wherein the paving machine is supported by the support frame so as to be pivotable between a support position and a folding position extending forward along the machine side. 2. A support guide is provided on the support frame so as to extend in a width direction of the machine, and a support guide is provided on the extension frame so as to extend in a longitudinal direction thereof. A lock member is engaged with the support guide portion of the support frame so as to be retractable and extendable. When the lock member is stored in the support guide portion of the support frame, the use position of the extension frame and the folding position are adjusted. Pivoting to and from the tatami mating position, wherein the locking member extends from the support guide of the support frame and a portion thereof is engaged with the support guide of the extension frame to extend the extension. The paving machine having the extension frame mechanism according to claim 1, wherein the frame is locked in the use position. 3. The extension frame is releasably locked in the folding position, and simultaneously the lock member is releasably locked in a state of being stored in the support guide portion of the support frame. The lock member is extended from the support guide of the support frame to lock the lock member in the use position, and the lock member is partially engaged with the support guide of the extension frame. 3. The paving machine having an extension frame mechanism according to claim 2, further comprising a lock means for releasably locking the support guide portion of the support frame. 4. The lock means is formed in a locking hole formed in each of the lock pieces provided in the support frame and the extension frame, and formed in each of the support guide and the lock member. And a lock pin attached to one of the support frame and the extension frame via an elongated connecting means capable of being displaced in an arbitrary direction, wherein the lock member supports the support frame. When the extension frame is positioned at the folding position in a state where the extension frame is stored in the guide portion, the locking holes of the lock pieces of the support frame and the extension frame and the support guide portion of the support frame. The lock hole is aligned with the lock hole of the lock member, and the extender is inserted into each of the aligned lock holes by removably inserting the lock pin. The paving machine having the extension frame mechanism according to claim 3, wherein an extension frame is locked in the folding position and the locking member is locked to the support guide of the support frame. 5. A pair of hinge pins which are provided at one end of the support frame and are vertically spaced from each other and extend in a vertical direction on a common axis. At the end, a pair of hinge pipes is provided extending vertically on a common axis at an interval in the vertical direction, and the extension frame with the lock member stored is provided with the hinge pipe. 5 is pivotably and removably fitted to the corresponding hinge pin so as to be pivotally supported by the support frame between the folding position and the use position.
A pavement machine having the extension frame mechanism according to any one of the preceding claims. 6. The support guide portion of the support frame includes a pair of side walls extending parallel to each other at intervals in a vertical direction, and a bottom wall disposed to cover one end of each of the side walls. Affixing the other end of each of the side walls of the support channel member to the support frame, wherein the support guide portion of the extension frame includes a pair of side walls extending parallel to each other at a distance from each other; A support channel member comprising a bottom wall disposed to cover one end of each of the side walls, wherein the other end of each of the side walls is fixed to the extension frame, and the locking members are spaced from each other. And a bottom wall disposed so as to cover one end of each of the side walls, and the extension frame is pivoted to the use position to form the extension. Paving machine having an extension frame mechanism according to any one of claims 2 to 5, wherein the support channel members of the extension frame are linearly aligned with the support channel members of the support frame. 7. The pavement machine having an extension frame mechanism according to claim 1, wherein an auxiliary extension frame is detachably attached to an end of the extension frame in an extending direction. 8. An auxiliary extension frame is detachably attached to an end of the extension frame in an extending direction, and a supported guide portion extends in a longitudinal direction of the auxiliary extension frame and is attached to the auxiliary extension frame. The auxiliary extension frame is disposed so as to protrude from one end of the auxiliary extension frame, and the auxiliary extension frame includes a portion of the supported guide portion protruding from the one end of the auxiliary extension frame. The pavement machine having the extension frame mechanism according to claim 2, wherein the extension frame mechanism is attached to the end of the extension frame in the extension direction by being movably and detachably engaged with the support guide. 9. The wheel includes a rear wheel located at the rear of the machine, the support frame is located proximate the rear of the rear wheel, and when the extension frame is positioned in the folded position, The paving machine having an extension frame mechanism according to claim 1 or 2, wherein the extension frame extends close to the outside of the rear wheel.