JPH1191646A - Running width switchable endless rail running vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the running width without increasing the equipment width of an endless rail running vehicle that can switch the running width. SOLUTION: In this running width switchable endless rail running vehicle, a drive cylinder unit 3 for switching the running width is pivotally coupled with a base frame 10 on an end, and on the other end, with the base end of a running width switching rod 40 which is slidably fit in a guide cylinder 21 on the support frame. The running width switching rod 40 and the guide cylinder 21 are equipped with a positioning stop means by fitting so that the both can be switched to a plurality of positions to stop by fitting. An arm 11 of the base frame 10 is formed with a load receiving protrusion or a groove in the sliding direction of the support frame. Both support frames are equipped with guides protruding inward each other which slidably fit with the load receiving protrusion or groove continuously to the guide hole in which the arm 11 slides. Even if the length that the arm 11 enters the guide hole on the support frame is shortened by increasing the width between the both support frames, the load receiving protrusion or groove receives the load of the support frame falling down inward since it is fit in the guide on the support frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infinite rail traveling vehicle that can be used in civil engineering works or the like and that can switch the traveling width.

[0002]

2. Description of the Related Art Most of crawler cranes, pile driving machines, and excavators used in civil engineering and construction work are mounted on caterpillar type infinite rail traveling vehicles. It is desired that the traveling width of these endless rail traveling vehicles be as narrow as possible when the traveling path at the work site is narrow, when there is an obstacle on the way, or when the vehicle is loaded and transported on a transport vehicle. . On the other hand, at the time of work, it is desired to make the running width as wide as possible to stably support the working device.

FIG. 14 shows a traveling width switching device of a conventional infinite rail traveling vehicle. The traveling width switching device includes a vehicle body (1).
The arm (11) protruding on both sides of the pedestal frame (10) is slidably penetrated into a support frame (2) located on the side of the pedestal frame (10) and having an infinite rail (20) extending around the outer periphery. The pedestal frame (10) and the support frame (2) are connected by a cylinder device (3). By extending and contracting the hydraulic cylinder device (3), the support frame (2) is slid in the width direction of the vehicle body (1) to switch the running width. If the cylinder device (3) having a large stroke is used and the arm (11) is lengthened, the traveling width can be increased. However, when the traveling width is reduced, the arm (11) cannot be contracted even if the cylinder device (3) is contracted and the endless rail support frame (2) is moved inward.
Below the distance between the arms on both sides of 0), there is a disadvantage that the running width cannot be reduced. Also, cylinder device (3)
Must be installed in the limited space between the two support frames (2) and (2). Increasing the stroke of the cylinder device (3) is necessary when the cylinder lengthens and the travel width decreases. There is a problem that the cylinder and the support frame (2) interfere with each other.

Therefore, the support frame (2) and the cylinder device
The position of the pivot connection (34) in (3) is switched between inner and outer stages so that the cylinder device (3) at the inner pivot connection position and the outer pivot connection position is expanded and contracted. 4
Means that can be switched to the step running width are also implemented (actually, Japanese Patent Publication No. 6-30622). However, for the above-described reason, there is a limit to lengthening the arm (11) of the pedestal frame (10). Therefore, when the infinite rail support frame (2) is largely moved outward, the center of the width of the support frame (2) is reduced. C2 is an arm (11)
Located outside the tip (12) of the camera. In this case, since a falling force acts on the support frame (2) inward as indicated by an arrow (8), the distal end surface (12) of the arm (11) is connected to the support frame (2).
It must not be located inside the width center C2 of (2). As described above, conventionally, there has been a problem that the longer the arm (11) is, the larger the minimum traveling width is, and the shorter the arm (11) is, the smaller the maximum traveling width is.

[0005] The present invention is configured so that even if the center of the width of the infinite rail support frame (2) is located outside the tip of the arm, the fall load inward of the support frame (2) can be sufficiently supported. Thus, an infinite rail running vehicle capable of increasing the difference between the minimum running width and the maximum running width is disclosed.

[0006]

According to the present invention, there is provided an infinite rail traveling vehicle having arms (11) protruding on both sides of a pedestal frame (10) of a vehicle body (1) positioned parallel to both sides of the pedestal frame (10). Guide holes in the support frame (2) with an infinite rail (20) stretched around
(24) is slidably fitted to the pedestal frame (10) and the supporting frame (2) by a cylinder device (3) so that the travel width can be switched by expansion and contraction of the cylinder device (3). In an endless rail vehicle, one end of a cylinder device (3) is connected to a pedestal frame (10), and the other end is a support frame.
(2) It is connected to the base end of the travel width switching rod (40) slidably fitted on the upper guide cylinder (21), and the traveling width switching rod (40) and the guide cylinder (21) are provided at a plurality of positions. A positioning locking means (4) which can be switched and locked to the base frame (10);
The arm (11) has a load receiving strip (13) that is convex or concave in the sliding direction of the support frame (2).
In (2), guide portions (26) slidably engaged with the load receiving strips (13) are formed to protrude inward from each other continuously with the guide holes (24) in which the arms (11) slide. .

Specifically, in the vicinity of the load receiving strip (13),
Lock plate between support frame (2) and pedestal frame (10)
The lock plate (51) is slidably fitted on the support frame (2) and the pedestal frame (10).
5), and pin holes (59) (5)
0), and a plurality of pin holes (71) (72) opened in the lock plate (51).
(73) (74) (75) (76)
(6) The positions of the support frames (2) and (2) with respect to the pedestal frame (10) may be fixed by fitting the (61).

Further, a pedestal frame is provided on the lock plate (51).
(10) The positioning stopper pin (62) for aligning the pin hole (50) of the upper receiving part (55) with the pin hole of the lock plate (51) can be replaced with the pin hole of the lock plate (51). May be fitted.

[0009]

[Operation and Effect] The switching rod (40) slidably fitted on the guide cylinder (21) on the support frame (2) and the fixed position of the guide cylinder (21) can be switched in a plurality of steps. If the cylinder device (3) can be switched in three stages by the extension and contraction of the cylinder device (3), for example, the switching lever (40) and the guide cylinder (21) can be switched in three stages, the left and right infinite in six stages. The interval between the rail support frames (2), that is, the running width can be switched. The distance between the left and right infinite rail support frames (2) and (2) may be set according to the traveling path of the infinite rail traveling vehicle, the working position, the size of the transport vehicle that transports the infinite rail vehicle, and the like.

By increasing the distance between the support frames (2) and (2), even if the penetration length of the arm (11) into the guide hole (24) on the support frame (2) is reduced, the arm ( 11) Since the upper load receiving strip (13) is fitted in the guide portion (26) on the support frame (2), the support frame (2) can receive a load that tends to fall inward, The support frame (2) can be stably supported.

A lock plate (51) is provided so as to straddle a receiving portion (52) on the support frame (2) and a receiving portion (55) on the pedestal frame (10). Pin holes (59) (50) and the lock plate (5
By fitting the pins (6) and (61) with the pin holes of (1) aligned, the switching width between the infinite rail support frames (2) and (2) is fixed, and the vehicle can run stably.

A positioning stopper pin (6) is provided on the lock plate (51).
2) Replaceable fitting of the support frame
(2) When adjusting the interval of (2), the positioning of the support frame (2) with respect to the arm (11) can be easily performed.

[0013]

FIG. 1 is a side view of an infinite rail running vehicle, and FIG. 2 is a plan view of a pedestal frame (10) and infinite rail supporting frames (2) and (2) of the infinite rail running vehicle. In the following description, the traveling direction of the self-propelled vehicle body (10) is referred to as a "front-back direction", and a direction orthogonal to the traveling direction in a horizontal plane is referred to as a "width direction" or a "left-right direction". In FIG. 2, the lower support frame (2) on the paper surface is closest to the center C1 in the width direction of the pedestal frame (10), and the upper support frame (2) is farthest away from the paper. However, in actual use, both support frames (2)
(2) is used at the same distance from the center C1 in the width direction of the pedestal frame (10), so it is not used in the state of FIG.

An infinite rail traveling vehicle (1) includes a pedestal frame (10).
Two arms (11) (11), (11) (11) on both sides in the width direction of
Are projected horizontally and in parallel, and the end of the arm (11) is slidably penetrated through the support frames (2) (2) on which the infinite rail (20) is stretched. On the pedestal frame (10), turntable (1
The main body (15) is rotatably provided via 4). Body
The working device mounted on (15), the drive device for the infinite rail (20), and the like are well known, and thus description thereof is omitted.

As shown in FIGS. 1, 2 and 6, the support frame (2) has a width between two guide holes (24) (24) in which the arms (11) of the pedestal frame (10) fit. A guide tube (21) having a round or square cross section penetrating in the direction is provided, and a switching rod (40) is slidably fitted in the guide tube (21). Guide tube (21)
Is located on the same vertical plane as the outer end of the infinite rail (20). The switching rod (40) and the pedestal frame (10) are linked by a hydraulic cylinder device (3), and the cylinder (3) of the cylinder device (3) is connected.
1) is pivotally connected (33) to the pedestal frame (10), and the distal end of the piston rod (32) is pivotally connected to the inner proximal end of the switching rod (40) (34).
Have been. The guide cylinder (21) and the switching rod (40) have the switching rod (4
Positioning / locking means (4) for fixing the switching rod (40) and the guide cylinder (21) by switching the amount of intrusion of the guide cylinder (21) into the guide cylinder (21) is provided.

The positioning and locking means (4) includes a through-pin hole (23) formed in a portion of the guide cylinder (21) projecting outward from the support frame (2), and a pin (23) fitted in the pin hole (23). 45) and switching rod (4
Two through pins (43) opened at an interval in the axial direction at (0)
(44). As shown in FIGS. 7 and 8, two positions where the pin (45) fitted in the pin hole (23) of the guide cylinder (21) is replaced with two through pin holes (43) and (44) of the switching rod (40). In addition to the switching, as shown in FIG. 9, switching to the position where the tip of the switching rod (40) abuts on the pin (45), that is, three positions, and the guide cylinder (2)
1) and the switching rod (40) can be fixed.

FIG. 3 shows a state in which a pin (45) is passed through a pin hole (23) of a guide cylinder (21) and a through pin hole (43) inside a switching rod (40), and FIG. 3) shows a contracted state, and FIG. 3b shows an extended state. Figure 4 shows the guide tube
The pin hole (23) of (21) and the through pin hole (44) outside the switching rod (40)
FIG. 4A shows a state in which the cylinder device (3) is contracted, and FIG. FIG. 5 shows a pin inserted through the pin hole (23) of the guide cylinder (21).
FIG. 5A shows a state where the cylinder device (3) is contracted, and FIG. 5B shows a state where the cylinder device (3) is extended, in a state where the tip of the switching rod (40) is opposed to (45). In the present embodiment, as described above, the fixed positions of the guide cylinder (21) and the arm (11) are switched to three positions, and both support frames (2) and (2) are connected to the width center C1 of the base frame (10). The cylinder device is set at the same distance from
By the enlargement / reduction of (3), the running width can be switched to six stages.

As shown in FIG. 6, the supporting frame (2) has a lower portion of the guide cylinder (21) on the supporting frame (2).
A groove notch (22) is opened up to the outer surface of (2), and a retaining piece (42) projecting downward from the tip of the switching rod (40) is slidably fitted. As shown in FIG. 9, the guide cylinder (21)
With the end surface (41) of the switching rod (40) facing the pin (45) inserted into the switch rod (40), the retaining piece (42) of the switching rod (40) is inserted into the guide cylinder (21).
Abuts the rear end (22a) of the groove notch (22).

As shown in FIGS. 1 and 6, the pedestal frame
Guide hole of support frame (2) into which arm (11) of (10) fits
(24) is formed in a rectangular shape corresponding to the rectangular shape of the cross section of the arm (11), and further has a groove (25) formed on both opposing inner side walls, and is supported so as to be continuous with the groove (25). The frame (2) has a guide portion (26) projecting inward. On both side walls of the arm (11), a square shaft-shaped load receiving strip (13) that is slidably fitted in the groove (25) and the guide section (26) is fixed by welding or the like.

The arm (11) of the pedestal frame (10) with the endless rail support frame (2) moved to the maximum outside as shown in FIG. 2 and the upper endless rail support frame (2) and FIG. 5b.
Of the support frame (2) is located inside the width center C2 of the support frame (2), but a guide portion (26) projecting inward from the support frame (2) is provided on the side surface of the arm (11). Since the slidably covers the projecting load receiving strip (13), the load acting on the support frame (2) to fall down inward is applied to the load receiving strip (13).
(13) can be supported.

As shown in FIGS. 6 and 10, the pedestal frame (1
Above the load receiving strip (13) before and after (0), the endless rail support frame (2) is located at a position visible from the outside and operable.
Locking means for selectively locking the lock in the six positions
(5) is provided. The locking means (5) is a support frame
The receiving part (52) protruding from the inner surface of (2) and the pedestal frame (10)
The lock plate (51) is slidably suspended over the receiving portion (55) protruding from the side surface of the, and the pin holes (59) (50) opened in both receiving portions (52) (55), and the locking plate Align the pin holes opened in (51) with the lock plate fixing pin (6) and the lock plate lock pin (6).
1) is fitted and fixed.

The receiving portion (52) on the supporting frame (2) side is an upper plate.
(53) and a lower plate (54), and the lock plate (51) is supported between the two plates (53) and (54) by fitting the ends of the lock plate (51). The receiving portion (55) on the pedestal frame (10) side is formed in a rectangular cylindrical shape, and V-shaped convex portions (55a) (55b) are provided at both ends in the sliding direction of the lock plate (51) on the upper surface.

In the lock plate (51), the first pin holes are formed in the longitudinal direction.
Six pin holes of the sixth pin hole are opened. The pedestal frame (10) side is a first pin hole (71), and the support frame (2) side is a sixth pin hole (76). A first pin hole is provided on the upper surface of the lock plate (51).
A first contact piece (56) is provided at the tip of the (71) side, and a second contact piece (57) is protruded at the support frame (2) side of the fourth pin hole (74).
V-shaped concave portions (58) and (58) are formed on the opposing surfaces of the contact pieces (56) and (57).

In the pin hole of the lock plate (51), in addition to the lock plate fixing pin (6) and the lock plate lock pin (61), a positioning stopper pin (62) is removably fitted. At the upper end of the positioning stopper pin (62), an arrow blade-shaped plate (63) is projected perpendicular to the axis, and one end of the arrow blade-shaped plate (63) has a V-shaped convex portion (64). Hit piece (56) (57) on board (51)
Can be engaged with the V-shaped recess (58) of the
The V-shaped concave portion (65) at the other end of the base frame (10) is engageable with the V-shaped convex portions (55a) and (55b) of the receiving portion (55) on the base frame (10).

FIGS. 11, 12 and 13 show the lock plate fixing pin (6) and the lock plate lock pin in the locked state by the lock plate (51) at the six-stage switching position of the endless rail support frame (2). (61) and the position of the positioning stopper pin (62). FIG. 11a shows, as shown in FIGS.
The pin (45) on the guide cylinder (21) is fitted in the through-pin hole (43) inside the switching rod (40), and the locking mechanism (5) in the contracted state of the cylinder device (3) is set. In the locked state, the relationship between the arm (11) and the support frame (2) is as shown in FIG. 3A, and in the embodiment, the running width is 3000 mm. 3, the lock plate (51) on the left side from the width center C1 of the pedestal frame (10) is omitted (the same applies to FIGS. 4 and 5). FIG.
As shown in a, the lock plate fixing pin (6) on the receiving portion (52) on the support frame (2) side is engaged with the fifth pin hole (75) of the lock plate (51).
The lock plate lock pin (61) on the receiving portion (55) of the pedestal frame (10) is fitted in the fourth pin hole (74) of the lock plate (51). Arrow blade-shaped piece of positioning stopper pin (62)
(63) engages with the first contact piece (56) and waits.

From the state shown in FIG.
FIG. 11B shows that (3) is extended and locked. This corresponds to FIG. 3b, in which the running width is 354 in the example.
0 mm. Lock plate (5) against lock plate fixing pin (6)
The position of (1) does not change, but the lock plate lock pin (61) is replaced with the second pin hole (72) of the lock plate (51). Lock plate (5
The positioning stopper pin (62) fitted in the first pin hole (71) of (1) and waiting is inserted into the receiving portion (55) in the V-shaped recess (65) of the arrow blade-like plate piece (63) at the upper end. ) Serves to align the pin hole (50) of the receiving portion (55) with the second pin hole (72) of the lock plate (51) when the V-shaped convex portion (55a) is fitted. The support frame (2)
The distance between the second pin hole (72) and the fourth pin hole (74), that is, 270 mm in the embodiment, moves outward.

FIG. 12A shows a guide cylinder (2) as shown in FIG.
1) The upper pin (45) is the through pin hole (44) outside the switching rod (40).
The cylinder device (3) is in the locked state of the locking means (5) in the contracted state, and the arm (1)
The relationship between 1) and the support frame (2) is as shown in FIG.
In the embodiment, the running width is 3250 mm. The position of the lock plate (51) with respect to the lock plate fixing pin (6) is the same as described above, but the lock plate lock pin (61) is replaced with a third pin hole (73) of the lock plate (51). 11b, the support frame (2) has moved inward by the distance between the second pin hole (72) and the third pin hole (73), in this embodiment 145 mm. The positioning stopper pin (62) is brought into contact with the second contact piece (57) of the lock plate (51), fitted in the fourth pin hole (74) and kept in a standby state. The position of the third pin hole (73) of the lock plate (51) can be easily and reliably adjusted.

From the state shown in FIG.
FIG. 12B shows that (3) is extended and locked. This corresponds to FIG. 4b, in which the running width is 379 in the example.
0 mm. Lock plate (5) against lock plate fixing pin (6)
The position of 1) does not change, but the lock plate lock pin (61) is replaced with the first pin hole (71) of the lock plate (51). Lock plate (5
At the position where the V-shaped convex portion (55a) of the receiving portion (55) engages with the V-shaped concave portion (58) of the first contact piece (56) of (1), the pin hole (50) of the receiving portion (55) is formed. ) Matches the first pin hole (71) of the lock plate (51), so that the lock plate lock pin (61) can be easily fitted. 12a, the first pin hole (71) of the lock plate (51) and the third
This means that the support frame (2) has moved outward by a distance from the pin hole (73), in this embodiment, by 270 mm.

FIG. 13A shows a guide cylinder (2) as shown in FIG.
1) The tip end surface (41) of the switching rod (40) faces the upper pin (45), and the cylinder device (3) is in a locked state of the locking means (5) in a contracted state, The relationship between the arm (11) and the support frame (2) is as shown in FIG. 5a, and in the embodiment, the running width is 3460 mm. The lock plate fixing pin (6) on the receiving portion (52) on the support frame (2) side is fitted into the sixth pin hole (76) of the lock plate (51), and the receiving portion on the pedestal frame (10) side.
(55) The lock plate lock pin (61) on the third lock plate (51)
Replace with the pin hole (73). Positioning stopper pin (62)
Is fitted in the fourth pin hole (74), and the receiving portion (55) and the lock plate
(51) plays the role of positioning the pin hole. 12b, the distance between the first pin hole (71) and the third pin hole (73) of the lock plate (51), the fifth pin hole (75) and the sixth
The support frame (2) has moved inward by the difference in distance from the pin hole (76), in this embodiment by 165 mm.

From the state shown in FIG.
FIG. 13B shows that (3) is extended and locked. This corresponds to FIG. 5b, where the running width is 400 in the example.
0 mm. Lock plate (5) against lock plate fixing pin (6)
The position of 1) is the same as that of FIG. 13A, but the lock plate lock pin (61) is replaced with the first pin hole (71) of the lock plate (51). Compared to FIG. 13a, the first pin hole (71) of the lock plate (51)
The support frame (2) has moved outward by a distance between the support frame (2) and the third pin hole (73), in this embodiment 270 mm.

In the state shown in FIGS.
When (3) is extended, the tip surface (41) of the switching rod (40) is
The support frame (2) can be moved outward by pressing the pin (45) fitted in (1), and when the cylinder device (3) is contracted, the retaining piece (42) at the tip of the switching rod (40) is used. ) Is the guide tube (21)
The support frame (2) can be pulled inward by being hooked on the back end (22a) of the groove notch (22) of the support frame.
There is no hindrance to the movement of (2).

In order to switch and fix the guide cylinder (21) and the switching rod (40) in three stages, three pin holes may be formed in the switching rod (40). In this case, the switching rod (40) When the pin (45) is fitted in the innermost pin hole of the
Of the guide tube (21)
When the tip of the infinity rail (20) and the outer end of the infinite rail (20) are located on the same vertical plane, the tip of the switching rod (40) protrudes outside the infinite rail (20) in the running width direction, and The running width does not decrease.

As described above, the infinite rail traveling vehicle of the embodiment is as follows.
Since the positions of the switching rod (40) and the guide cylinder (21) slidably fitted on the guide cylinder (21) on the support frame (2) can be switched in three stages, the cylinder device (3) in each switching stage can be switched. ), The number of stages is twice the number of switching stages, for example,
If the switching rod (40) and the guide cylinder (21) can be switched in three stages, the interval between the left and right infinite rail support frames (2) and (2), that is, the running width can be switched in six stages. The distance between the left and right infinite rail support frames (2) and (2) may be set according to the traveling path of the infinite rail vehicle, the work position, the size of the transport vehicle that transports the infinite rail vehicle, and the like.

By increasing the width between the two support frames (2) and (2), even if the penetration length of the arm (11) into the guide hole (24) on the support frame (2) becomes shorter, the arm ( 11) Since the upper load receiving strip (13) is fitted in the guide portion (26) on the support frame (2), the support frame (2) can receive a load that tends to fall inward, The support frame (2) can be stably supported.

A lock plate (51) is provided over a receiving portion (52) on the support frame (2) and a receiving portion (55) on the pedestal frame (10), and pins of the receiving portions (52) and (55) are provided. Hole (59) (50) and the lock plate (51)
By fitting the pins (6) and (61) so that the pin holes are aligned with each other, the switching width between the infinite rail support frames (2) and (2) is fixed, and the vehicle can run stably. The positioning stopper pin (62) is replaceably fitted on the lock plate (51), so that the arm (11) can be used when adjusting the distance between the support frames (2) and (2).
The positioning of the support frame (2) with respect to is easily performed.

In the embodiment of the present invention, the load receiving strip (13) formed on the arm (11) is provided on the arm (11) in the embodiment, but the groove is provided on the arm (11). This may be used as a concave load receiving strip (13). In this case, the guide portion (26) projecting inward from the support frame (2) can slide on the concave load receiving strip (13). Needless to say, the fitting shape is adopted. Further, the switching of the fixed position between the switching rod (40) and the guide cylinder (21) is not limited to three steps, and the number of steps is not limited as long as it is a plurality of steps.

According to an embodiment, an endless rail support frame
(2) Positioning and locking means (4) for switching the interval in (2)
Operation, ie, replacement of the pin (45) with respect to the guide cylinder (21), and replacement of the device of the locking means (5), ie, replacement of the lock plate fixing pin (6) and the lock plate lock pin (61), are performed by the support frame. The work can be performed from the outside of (2) and the front and rear outside of the pedestal frame (10), so that the work is easy and the running width can be switched easily and efficiently. Further, since the engagement positions of the lock plate fixing pin (6) and the lock plate lock pin (61) with respect to the lock plate (51) of the lock means (5) can be confirmed from the outside, it is possible to further reduce or expand the current travel width. It is easy to know whether or not it is possible. The present invention is not limited to the configuration of the above embodiment, and various modifications are possible within the scope of the claims.

[Brief description of the drawings]

FIG. 1 is a side view of an infinite rail traveling vehicle.

FIG. 2 is a plan view of a pedestal frame of an infinite rail traveling vehicle and an infinite rail support frame.

FIG. 3A shows a traveling width in a state where the cylinder device is contracted, and FIG. 3B shows a traveling width in a state where the cylinder device is extended in a state where the support frame is set to the inner position by the positioning and locking means. .

FIG. 4A shows a traveling width in a state where the cylinder device is contracted, and FIG. 4B shows a traveling width in a state where the cylinder device is extended in a state where the support frame is set at an intermediate position by the positioning and locking means. .

FIG. 5A shows a traveling width in a state where the cylinder device is contracted, and FIG. 5B shows a traveling width in a state where the cylinder device is extended in a state where the support frame is set to the outer position by the positioning and locking means. .

FIG. 6 is a perspective view of a positioning and locking means and a locking means.

FIG. 7 is an explanatory view showing a state of positioning and locking means with a support frame set at an inner position.

FIG. 8 is an explanatory view showing a state of a positioning and locking means in which a support frame is set at an intermediate position.

FIG. 9 is an explanatory diagram showing a state of a shape positioning and locking means in which a support frame is set at an outer position.

FIG. 10 is a perspective view of a lock unit.

FIG. 11A shows the position of the pin with respect to the lock plate when the cylinder device is contracted, and FIG. 11B shows the position when the cylinder device is extended when the support frame is set at the inner position.

FIG. 12A shows the position of the pin with respect to the lock plate when the cylinder device is contracted, and FIG. 12B shows the position when the cylinder device is extended when the support frame is set at the intermediate position.

FIG. 13A shows the position of the pin with respect to the lock plate when the cylinder device is contracted, and FIG. 13B shows the position when the cylinder device is extended when the support frame is set at the outer position.

FIG. 14 is a sectional view of a main portion of a conventional traveling width switching device.

[Explanation of symbols]

 (10) Pedestal frame (11) Arm (13) Load receiving strip (2) Support frame (20) Infinite rail (21) Guide cylinder (24) Guide hole (26) Guide section (3) Cylinder device (4) Positioner Stop means (5) Lock means

Claims (3)

[Claims] An arm (11) projecting from both sides of a pedestal frame (10) of a vehicle body (1) is supported in parallel with both sides of the pedestal frame (10) and having an infinite rail (20) stretched around its outer periphery. Frame (2)
Slidably fit into the guide holes (24) of the pedestal frame (1
0) and the support frame (2) are connected by a cylinder device (3), and the traveling width can be switched by expansion and contraction of the cylinder device (3). One end is connected to the pedestal frame (10), and the other end is connected to the base end of the running width switching rod (40) slidably fitted in the guide cylinder (21) on the support frame (2), The rod (40) and the guide cylinder (21) are provided with positioning and locking means (4) capable of switching and locking the two at a plurality of positions, and the arm (11) of the pedestal frame (10) is provided with a support frame.
A convex or concave load receiving strip (13) is formed in the sliding direction of (2), and both support frames (2) are connected to the guide hole (24) in which the arm (11) slides. A guide portion (26) slidably engaging with the support frame (13) is projected inward from each other, and a guide hole on the support frame (2) is formed by increasing the width between the support frames (2) and (2). Arm (11) to (24)
Even if the intrusion length becomes short, the load receiving strip (13) fits in the guide portion (26) on the support frame (2),
An infinite rail traveling vehicle capable of switching the traveling width, wherein the supporting frame (2) receives a load that tends to fall inward. 2. A lock plate (51) is provided between the support frame (2) and the pedestal frame (10) at a position visible from the front and rear outside of the pedestal frame (10). The pedestal frame (10) is provided with receiving portions (52) (55) into which the lock plate (51) is slidably fitted, and pin holes (59) (59) ( The pin (6) is made by matching any of the plurality of pin holes (71), (72), (73), (74), (75), and (76) of the pin plate (50) with the lock plate (51). 2. A traveling width switchable endless track according to claim 1, further comprising a locking means (5) for fixing the position of the two support frames (2) with respect to the pedestal frame (10) by fitting the (61). car. 3. A pedestal frame (10) on a lock plate (51).
A positioning stopper pin (62) for aligning the pin hole (50) of the upper receiving portion (55) with the pin hole of the lock plate (51) is inserted into the pin hole of the lock plate (51) in a replaceable manner. Claim 1
Or an infinite rail traveling vehicle capable of switching the traveling width according to 2.