JP2002012166A - Truck frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a truck frame allowed to smoothly juxtapose these connecting parts even if the connecting part for a shaft excavator and the connecting part for a jack cylinder are juxtaposed and capable of improving peripheral strength of the connecting parts. SOLUTION: In this truck frame having a truck frame body 1 allowed to detachably install a travel body 5 by a crawler and mountable with a construction work machine such as a crane and a driver's seat and constituted to be usable for receiving rotary reaction of a easing driver 4, the truck frame is attached with the jack cylinder 3 capable of supporting the truck frame body 1 instead of the travel body 5, and a composite bracket 2 integrally formed of the connecting part 2a for the easing driver for connecting the easing driver 4 by a pin 6a via a joint 6 when receiving the rotary reaction and the connecting part 2b for the jack cylinder for rotatably connecting the jack cylinder by a pin 3b via an arm 3a, is installed in front and rear end parts of the truck frame body 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track frame of a self-propelled construction machine adapted to be used for receiving a rotational reaction force of a vertical excavator such as a casing driver.

[0002]

2. Description of the Related Art The all-casing method is a method of constructing an underground structure such as a steel pipe pile or a cast-in-place pile by excavating the ground with a state-of-the-art casing while rotating a casing such as a steel pipe and pushing it into the ground. It is. In order to push the casing into the ground by this all-casing method, a vertical hole excavator such as a casing driver that excavates a vertical hole by rotating and pushing the casing is used. When excavating a vertical hole with such a vertical hole excavator, the excavator is excavated by rotating the rotating part of the vertical hole excavator in one direction or swinging by repeating small and normal rotation. Exerts such a force as to be rotated in a direction opposite to the rotation direction, that is, a rotational reaction force.

[0003] Since the vertical reaction machine of the vertical excavator used in the all-casing method is extremely large, when excavating under the ground, the vertical reaction machine receives the rotation reaction force by the reaction force receiving member so that the vertical reaction machine is not rotated by the rotation reaction force. I need to get it.
When the rotational reaction force is received by the reaction force receiver, a construction work machine such as a crane or a heavy-weight self-propelled construction machine equipped with a driver's seat and self-propelled by a traveling body such as a crawler is used as the reaction force receiver. The technique has been adopted conventionally. A technique for receiving a rotational reaction force of a vertical excavator by such a method is disclosed in, for example, Japanese Patent Laid-Open No. 10-1.
No. 83620 and Japanese Patent Application No. 61-84737 (Japanese Utility Model Application Laid-Open No. 61-84737).

The applicant has been developing technology for using a large self-propelled construction machine, which performs construction work such as foundation work in cooperation with a casing driver, as a reaction force receiving body. When transporting such a large self-propelled construction machine to the work site, due to weight restrictions, the construction work machine such as a crane, the driver's seat, the truck frame for mounting them, and the traveling body are separated from each other on a trailer. After loading and shipping, it is necessary to assemble these elements at the work site. The technology developed by the applicant so far has been developed in order to facilitate loading and unloading of truck frames when transporting and assembling self-propelled construction machines using such methods. In particular, a jack-up device is provided. The present invention is intended to improve a track frame of the type provided with such a jack-up device so that a function of receiving a rotational reaction force of a casing driver can be easily provided.

Therefore, the technology developed by the applicant has been positioned as a conventional technology, and an outline thereof will be described with reference to FIG. FIG. 5 is a plan view schematically showing a state in which a construction machine having a track frame according to the related art receives an excavation reaction force of a casing driver.

In FIG. 5, reference numeral 1 denotes a track frame main body on which a construction work machine such as a crane and a driver's seat can be mounted. Reference numeral 3 denotes a jack cylinder capable of supporting the track frame main body 1 in place of a traveling body 5 described later. An arm 4 for connecting and supporting the jack cylinder 3 to a bracket 8 to be described later is a casing driver 4 as a vertical hole excavator for press-fitting the casing into the ground, and 4a is fixed to the casing driver 4 so that the casing driver 4 is fixed. A joint 5 connected to the bracket 9 described below is a traveling body by a crawler for enabling the self-propelled construction machine to travel,
8 is a bracket for the jack cylinder provided on the track frame main body 1 and connecting the jack cylinder 3; 9 is a casing driver provided on the track frame main body 1 and connected to the casing driver 4 when receiving the rotational reaction force of the casing driver 4 The bracket 10 is a pin for pivotally connecting the joint 4a to the bracket 9 so that the joint 4a can be rotated in the vertical direction. This is a turning device for turning the body 11 (see FIGS. 2 and 4).

The jack cylinder 3 extends so as to lift the track frame main body 1 to a height (usually 700 mm to 800 mm) at which the bed of the trailer can enter under the track frame main body 1. The jack-up device is constituted by attaching the jack cylinders 3 to the pair of jack cylinder brackets 8 provided on the front and rear sides of the track frame main body 1 via the arms 3a. The casing driver 4 can be connected to the track frame main body 1 by pivotally connecting the pin insertion portion of the joint 4a to the casing driver bracket 9 with the pin 10 and, when the casing driver 4 is driven to rotate, applies a rotational reaction force to the bracket 9. Through the track frame main body 1. The casing driver 4 can be separated from the track frame main body 1 by removing the pin 10 as necessary.

The casing driver 4 holds the casing with a holding device such as a band for holding the casing and applies a pushing force with a pushing device such as a thrust cylinder while rotating and driving the casing with a rotary drive device such as a hydraulic motor so that the casing is underground. It is configured to be press-fitted. Although there are various types of casing drivers, they are well-known devices and will not be described in detail here.

As shown in FIG. 2, a traveling body 5 formed by a crawler includes a front wheel 5a as a sprocket, a rear wheel 5b as an idler, and these wheels 5.
a, 5b, which is an endless chain-like crawler belt 5c. And the front wheel 5a
Is driven by a hydraulic motor with a speed reducer, the crawler belt 5c is driven by a front wheel 5a, and is rotated while being guided by a rear wheel 5b, so that the traveling body 5 can travel. Regarding such a structure, the traveling body 5 according to the prior art shown in FIG.

The present track frame comprises the above-described track frame body 1, a pair of front and rear jack cylinders 3, arms 3a and brackets 8 for jack cylinders.
And a bracket 9 for a casing driver. The truck frame is a base for assembling a self-propelled construction machine by installing various construction work machines. It should be noted here in connection with the present invention that the track frame is
The point is that a jack-up device not provided in a normal track frame is provided.

When assembling a self-propelled construction machine on the basis of a truck frame, the traveling body 5 is mounted on the left and right sides of the truck frame main body 1 and the turning device 11a is mounted on the upper portion. A turning frame is installed on the upper part of the turning device 11a, and a driver's seat and other necessary equipment are installed on the upper part of the turning frame, and an upper part shown in FIGS. The revolving unit 11 is configured. A desired construction work machine such as a crane is also mounted on the upper part of the revolving frame. The construction work machine mounted on the truck frame body 1 includes a crane, which is an indispensable device for the all-casing method, an earth drill for drilling a hole with a rotating bucket, and an earth auger for drilling a hole with a spiral cone. A device for discharging earth and sand in the casing may be mentioned, but the type is not limited.

When transporting a truck frame to a work site, when the truck frame is small, the truck 5 may be loaded on a trailer and transported while the traveling body 5 and the turning device 11a are attached to the truck frame. Then, it is necessary to transport the heavy traveling body 5 in a detached state. In the conventional truck frame developed by the applicant, the jack cylinder 3 capable of supporting the track frame main body 1 instead of the traveling body 5 is particularly useful for loading the truck frame from which the traveling body 5 has been removed onto a trailer. It is attached.

Therefore, the truck frame main body 1 is supported on the ground by the jack cylinder 3, and the jack cylinder 3
When the vehicle is lifted by stretching, a space can be formed below the truck frame main body 1 in which the carrier of the trailer can enter. Therefore, when the trailer is backed from the side of the truck frame main body 1 toward the space, the trailer carrier can be inserted into the space below the truck frame main body 1, and thereafter, the jack cylinder 3 is contracted. Thus, the truck frame can be easily laterally stacked on the bed of the trailer.

[0014]

However, while this conventional track frame has these advantages,
Since the jack cylinder bracket 8 for connecting the jack cylinder 3 must be provided, the following problem arises.

1) Both the pair of jack cylinder brackets 8 and the casing driver brackets 9 must be arranged within the limited width of the end of the track frame body 1, so the space for arranging the brackets is insufficient. I do. Therefore, if these brackets 8 and 9 are arranged without difficulty, the width of the bracket 9 for the casing driver must be reduced, and the strength of the bracket 9 that receives a large rotational reaction force of the casing driver becomes insufficient.

2) To eliminate such a problem, if the width of the bracket 9 for the casing driver is set to a normal size, as shown in FIG. P is formed, resulting in an undesirable shape in terms of strength. Therefore, when a rotational reaction force of the casing driver acts on the bracket 9 for the casing driver, stress concentration occurs at the portion P where the cross section suddenly changes, resulting in a decrease in strength, and the portion P is easily damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem in the prior art, and the technical problem is that a desired front and rear ends of a track frame main body are provided.
Even if a connecting portion for a vertical hole excavator for receiving the rotational reaction force of the vertical hole excavator and a connecting portion for a jack cylinder can be installed side by side compared to the conventional technology, the vertical hole excavating machine can be easily installed. The object of the present invention is to provide a track frame capable of improving the strength of the periphery of a connecting portion for use.

[0018]

SUMMARY OF THE INVENTION An object of the present invention is to provide a truck driver having a truck frame body on which a traveling body such as a crawler can be removably attached, a construction work machine such as a crane, and a driver's seat can be mounted. In a track frame configured to be able to be used to receive the rotation reaction force of a vertical hole excavator, etc., a jack cylinder capable of supporting the track frame body instead of the traveling body is attached, and the rotation of the vertical hole excavator is A composite bracket integrally formed with a connecting portion for a vertical hole excavator for connecting a vertical hole excavator and a connecting portion for a jack cylinder for connecting a jack cylinder when receiving a reaction force is attached to a truck frame body. , Is achieved.

Since the truck frame of the present invention has the jack cylinder, the truck frame body is supported on the ground and lifted up and down to form a space under the truck frame body for accommodating the trailer carrier. The operation of loading the frame on the trailer can be easily performed by operating the jack cylinder. In addition to exhibiting such excellent effects, the above-mentioned problem in the prior art caused by the attachment of the jack cylinder is also solved.

That is, when attaching the jack cylinder, a composite bracket is provided in which the connecting portion for the vertical hole excavator and the connecting portion for the jack cylinder are integrally formed. Even if the connecting part for the vertical hole excavator and the connecting part for the jack cylinder are installed side by side, the width of the bracket to which the rotational reaction force of the vertical hole excavator is applied can be made wider than the conventional technology, and the conventional technology It is not necessary to provide an abrupt cross section between the two connecting portions as described above. Therefore, even if a connecting portion for a vertical excavator and a connecting portion for a jack cylinder are juxtaposed at desired front and rear ends of the truck frame main body, they can be juxtaposed without difficulty compared to the conventional technology. It is possible to improve the strength around the connecting portion for the machine.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 1 to 4 showing concrete examples showing how the present invention is actually embodied. I do. FIG. 1 is a plan view schematically showing a state in which a construction machine having a track frame according to a first embodiment of the present invention receives an excavation reaction force of a casing driver, FIG.
FIG. 3 is a side sectional view of FIG. 1, and FIG. 3 is a plan view schematically showing a state in which a construction machine equipped with a track frame according to a second embodiment of the present invention receives an excavation reaction force of a casing driver. 4 is a side sectional view of FIG. Note that, for convenience of explanation, the upper swing body 11 is shown in FIGS.
Are not shown, but are shown only in FIGS. 2 and 4. Figure 1
4 to 4, the same reference numerals as those in FIG. 5 denote the same parts as those in FIG.

In each of the track frames of the first embodiment and the second embodiment of the present invention, similarly to the track frame of FIG. And a truck frame main body 1 on which a construction work machine such as a crane and a driver's seat can be mounted via a turning frame 11 and the like, and for convenience when loading a truck frame separated from the traveling body 5 on a trailer, The truck frame body 1 is
And a pair of jack cylinders 3 that can be supported in place of the above. Also, a bracket is provided on the track frame main body 1 and the casing driver 4 is connected to the bracket so that the casing driver 4 can be used to receive a rotational reaction force.
The basic structure is the same as the track frame of FIG.

First, the first embodiment of the present invention will be described with reference to FIGS.
A track frame of a specific example will be described.

2, a casing driver connecting portion 2 a for connecting the casing driver 4 and a jack cylinder connecting portion 2 b for connecting the jack cylinder 3 when receiving the rotational reaction force of the casing driver 4 are respectively located at the center and left and right. It is a composite bracket formed integrally. The connecting portions 2b for jack cylinders are provided at the left and right ends of the front portion of the composite bracket 2, so in the example shown here, the front portion of the composite bracket 2 is formed slightly wider than the rear side. In the example shown here, since the connecting portion 2a for the casing driver is designed to be provided before and after the track frame main body 1, such a composite bracket 2 is attached to the front end and the rear end of the track frame main body 1 by welding. However, the track frame body 1 may be attached to only one of the front end portion and the rear end portion, and an appropriate attachment means such as a pin attachment means described later may be selected. Can be.

Reference numeral 6 denotes a joint for connecting the casing driver 4 to the composite bracket 2. The joint 6 has a front end portion rotatably and detachably attached to a bracket 4b for pivoting a joint provided on the casing driver 4 with a pin 6b, and a rear end portion to a central connecting portion 2a of the composite bracket 2. It is rotatably and detachably attached by a pin 6a. Therefore, the casing driver 4 can tilt about the pin 6b when a rotational reaction force is generated, and the joint 6 can also tilt about the pin 6a. Further, since the joint 6 is detachably attached to the composite bracket 2 by the pin 6a, when the track frame is separated from the traveling body 5 and loaded on the trailer, it can be detached from the composite bracket 2 by removing the pin 6a. it can. Such a joint 6 is provided as an attachment to a track frame.

As shown in FIG. 2, each of the composite bracket 2, the bracket 4b and the joint 6 which are pivotally mounted on the joint is made of a pair of steel plates which are arranged in parallel at an interval above and below. Reference numeral 7 denotes a spacer which is provided between the casing driver 4 and the traveling body 5 and transmits a rotational reaction force of the casing driver 4 to the traveling body 5. When the casing driver 4 is installed, the rotation center of the casing driver 4 only needs to be adjusted to the center position of the underground structure to be constructed. Therefore, the orientation of the casing driver 4 slightly changes each time construction is performed. The distance between 4 and the vehicle 5 also changes. The spacer 7 is configured by a hydraulic cylinder that expands and contracts in order to adjust the length and allow the spacer 7 to contact the traveling body 5 even if such a situation occurs.
Further, the cylinder side is configured to be detachably attached to the casing driver 4, and the rod side is provided with a contact member 7 a for contacting the end of the traveling body 5.

Accordingly, when a rotational reaction force is generated in the casing driver 4, the casing driver 4 and the joint 6 tilt about the pins 6b and 6a, respectively, so that the spacer 7 comes into close contact with the traveling body 5, so that the rotational reaction The force is well transmitted to the traveling body 5 via the spacer 7 and can be received by the traveling body 5 having extremely high strength. At this time, a slight rotational reaction force also acts on the composite bracket 2, but only a pulling force acts, and no bending stress acts.

Here, a pair of such spacers 7 are provided so that they can be attached to the left and right of the casing driver 4. However, in the case of the normal type casing driver 4 in which the casing is rotated in one direction and press-fitted, the excavation reaction force is left and right. Since it acts on only one of the traveling bodies 5, at least one spacer 7 may be provided. Instead of using a hydraulic cylinder whose length can be adjusted as the spacer 7, a plurality of spacers such as shims having different lengths are prepared, and an appropriate length is set according to the distance between the casing driver 4 and the traveling body 5. It is also possible to select and use the first one.

The jack cylinder 3 is connected to a jack cylinder connecting portion 2b via an arm 3a. The arm 3a is rotatably attached to the jack cylinder connecting portion 2b by a pin 3b. Each of the pair of front and rear arms 3a is attached by such a structure. The connecting portion 2a for the casing driver
Is provided only on one of the front and rear sides of the track frame main body 1, the arm 3a on the other side may be provided rotatably by providing a dedicated bracket.

The operation and effect of the track frame having the above structure will be described. Since this truck frame includes the jack cylinder 3, when transporting the truck frame from which the traveling body 5 has been removed to the work site, the jack cylinder 3 is installed in the state shown in FIG. 1 and the truck frame main body 1 is supported on the ground. After that, the truck frame main body 1 is raised by the jack cylinder 3 to form a space below the truck frame main body 1 in which the loading platform of the trailer can enter. Next, the trailer is backed from the side of the truck frame main body 1 so that the trailer carrier is inserted into the space below the truck frame main body 1, and the jack cylinder 3 is contracted to easily move the truck frame to the trailer carrier. Can be stacked side by side.

After the truck frame has been loaded on the trailer bed, the arms 3a are turned laterally from the state shown in FIG. 1 so that the arms 3a do not protrude significantly from the side of the trailer bed. To As a result, each arm 3a can be accommodated within the specified width with a margin, and there is no possibility that the arms 3a become obstacles to transporting the vehicle. The present truck frame not only exhibits the above-described excellent effects by attaching the jack cylinder 3 to the track frame main body 1 through such an arm 3a, but also attaches the jack cylinder 3 to the jack cylinder 3 as described below. Therefore, the problem caused by the conventional technique can be solved.

That is, when the jack cylinder 3 is attached, the composite bracket 2 in which the connecting portion 2a for the casing driver and the connecting portion 2b for the jack cylinder are integrally formed is provided. Even if the connecting portion 2a for the casing driver and the connecting portion 2b for the jack cylinder are provided side by side at desired ends, the width of the bracket to which the rotational reaction force of the casing driver 4 is applied can be made wider than in the prior art. In addition to this, it is not necessary to provide a suddenly changing section P between the connecting portions 2a and 2b as in the related art. Therefore, even if the connecting portion 2a for the casing driver and the connecting portion 2b for the jack cylinder are provided side by side at the desired front and rear ends of the track frame main body 1, the connecting portions 2a can be provided without difficulty compared to the conventional technology. The strength around the casing driver connecting portion 2a can be improved.

Further, in the example shown here, the casing driver 4 can be tilted particularly in the left-right direction, so that the rotational reaction force of the casing driver 4 can be received by the traveling body 5 having extremely high strength. Then, even if the composite bracket 2 and the traveling body 5 receive a stress based on the rotational reaction force, the composite bracket 2 and the traveling body 5 substantially receive only a simple stress due to a tensile force and a compressive force, and do not receive a complicated bending stress. For this reason, in particular, the composite bracket 2 is not subjected to stress that causes breakage, and the durability of the composite bracket 2 can be improved. Further, since the composite bracket 2 is provided before and after the truck frame main body 1, a desired composite bracket 2 can be selected and used in accordance with the situation at the work site, so that it is convenient and the entire jack cylinder 3 can be used. It can be installed using the composite bracket 2.

Next, the second embodiment of the present invention will be described with reference to FIGS.
A track frame of a specific example will be described.

The present track frame is different from the track frames of FIGS. 1 and 2 described above in that when the composite bracket 2 is attached to the track frame body 1,
1 and FIG. 2 are attached by welding, whereas the truck frame is detachably attached by the pins 12. In other respects, there is a fundamental difference between the two structures. Absent.

The characteristic structure of the present track frame will be described. When each of the front and rear composite brackets 2 is attached to the track frame main body 1 with the pins 12, the composite bracket 2 is supported by the pins 12 on the track frame main body 1 side. A supporting bracket 1a is provided, and a holding bracket 2c composed of a pair of holding pieces arranged so as to hold the bracket 1a is provided on the composite bracket 2 side. The two left and right brackets 1 a and 2 c are provided at the end of the track frame main body 1 when attaching one composite bracket 2.

As can be seen from FIG. 4, the supporting bracket 1a and the holding bracket 2c have a pair of upper and lower pins so that the pins 12 can be inserted in a state where the supporting bracket 1a is held by the holding bracket 2c. Pin holes are drilled. Each composite bracket 2 is attached to the track frame main body 1 by inserting pins 12 into upper and lower pin holes of both brackets 1a and 2c, respectively. Therefore, each composite bracket 2 is fixedly attached to the track frame main body 1 so as not to rotate. In this case, since each pin 12 is detachably inserted into the pin hole of both brackets 1a and 2c, each composite bracket 2 can be freely removed by pulling out the pin 12. Therefore, when it is not necessary to use the track frame as a reaction force receiver, the casing driver 4 can be freely separated from the track frame main body 1 not only by pulling out the pins 6a and 6b but also by pulling out the pin 12. be able to.

The effect of the fact that the composite bracket 2 is detachably attached to the track frame main body 1 will be described. When the track frame main body 1 as shown in FIG. 1 to which the composite bracket 2 is attached by welding is machined by a machine tool, the composite bracket 2 is welded to the track frame main body 1 in order to accurately process the vicinity of the mounting portion of the turning device 11a. Need to be machined. In that case,
As the machine tool, a machine having a table large enough to place not only the track frame body 1 but also the composite bracket 2 must be used, and it is necessary to provide a large machine tool. In this truck frame, although the small bracket 1a is fixed to the truck frame main body 1 by welding, the large composite bracket 2 is detachably attached.
Can be machined without being attached to the track frame main body 1. Therefore, the machining of the track frame body 1 requires the track frame body 1
A machine tool having a table large enough to mount the small bracket 1a and the small bracket 1a may be used.
It does not require a large machine tool as compared with the one that is attached by welding.

When the composite bracket 2 is detachably attached to the truck frame main body 1 as described above, when the truck frame is transported by a trailer, the composite bracket 2 is mounted on the truck bracket.
When it is in the way,
Therefore, even if the composite bracket 2 is designed to protrude greatly from the end of the truck frame main body 1, it does not hinder the transportation of the vehicle. Therefore, the composite bracket 2 can be provided so as to protrude from the end of the track frame main body 1 by a desired amount in design, and the rotational reaction force transmission mechanism of the casing driver 4 and the horizontal mounting position of the jack cylinder 3 can be adjusted. It can be designed in a desirable manner.

In this truck frame, when the composite bracket 2 is detachably attached to the truck frame main body 1, the composite bracket 2 is attached via the supporting bracket 1a provided on the track frame main body 1 side. 4, the position of the composite bracket 2 in the vertical direction can be arbitrarily adjusted, unlike the case where the composite bracket 2 is attached by welding, as shown in FIG. Therefore, the vertical mounting position of the composite bracket 2 can be appropriately adjusted according to the shape of the supporting bracket 1a and the position of the pin hole, and the mounting position of the jack cylinder 3 in the height direction can be selected to an optimum position.

Incidentally, the self-propelled construction machine has a self-propelled construction in which the width between the traveling bodies 5 can be adjusted by moving each of the left and right traveling bodies 5 with respect to the track frame body 1 by a hydraulic cylinder in the lateral direction. There are construction machinery. This width-adjustable self-propelled construction machine can be used, for example, when the crane works on the left and right traveling bodies 5.
The width between the traveling bodies 5 can be appropriately changed according to the purpose of use, for example, the width between the traveling bodies 5 is increased by increasing the space between the traveling bodies 5 and the width between the traveling bodies 5 is reduced during traveling to facilitate traveling. However, in the conventional technique, since both the pair of jack cylinder brackets 8 and the casing driver brackets 9 must be arranged within a limited width of the end of the track frame body 1, each traveling body 5 Therefore, it is difficult to secure a space for allowing the vehicle to move in the lateral direction, and it cannot be applied to such a width-adjustable self-propelled construction machine. On the other hand, the present invention can sufficiently secure a space for moving the traveling body 5 in the lateral direction, and thus can be applied to such a self-propelled construction machine without difficulty.

[0042]

As is apparent from the above description, the present invention employs the means described in the section of "Means for Solving the Problems". Even if the connecting portion for the vertical hole excavator and the connecting portion for the jack cylinder for receiving the rotational reaction force of the vertical hole excavator are installed at the desired front and rear ends, compared to the conventional technology, they are installed together without difficulty. Thus, a track frame can be obtained which can improve the strength around the connection for the vertical excavator. Since this truck frame is equipped with a jack cylinder that can support the track frame body in place of the traveling body, the operation of lifting and lowering the truck frame body while supporting it on the ground while separated from the traveling body must be performed. Thereby, the work of inserting the bed of the trailer into the space below the truck frame and horizontally loading the truck frame on the bed of the trailer can be easily performed.

When the present invention is embodied, particularly when embodied as described in claim 2, the following effects can be obtained in addition to these effects. First
When machining the track frame body, unlike when attaching the composite bracket to the track frame body by welding, the track frame body is placed on a machine tool table without the composite bracket and machined. Therefore, a large machine tool is not required for machining the track frame body as compared with a case where the composite bracket is attached by welding. Second, since the composite bracket can be detached from the truck frame main body when transporting the truck frame so as not to obstruct the transportation, the projecting amount of the composite bracket from the end of the truck frame main body can be reduced by design. It can be increased by a desired amount, and the horizontal mounting position of the rotary reaction force transmitting mechanism of the vertical hole excavator and the jack cylinder can be designed in a desirable manner.

When the present invention is embodied, particularly when embodied in claim 3, the operation of horizontally loading the truck frame on the trailer carrier as described above is performed by the jack cylinder. In addition to being easy to operate, once the truck frame is loaded on the trailer bed, the arm can be turned laterally so that the arm does not protrude significantly from the side of the trailer bed. Therefore, the arm can be accommodated within the specified width with a margin, and the truck frame can be transported to the vehicle without any trouble.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a state in which a construction machine having a track frame according to a first embodiment of the present invention receives an excavation reaction force of a casing driver.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a plan view schematically showing a state in which a construction machine having a track frame according to a second embodiment of the present invention receives an excavation reaction force of a casing driver.

FIG. 4 is a side sectional view of FIG. 3;

FIG. 5 is a plan view schematically showing a state in which a construction machine provided with a track frame according to the related art receives an excavation reaction force of a casing driver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Track frame main body 1a Bracket for support 2 Composite bracket 2c Bracket for holding 2a Connection part for casing driver 2b Connection part for jack cylinder 3 Jack cylinder 3a Arm 3b Pin 4 Casing driver 4b Bracket for joint joint 5 Bracket 6 Joint 6a, 6b Pin 7 Spacer 11a Swivel 12 Pin

Claims (3)

[Claims] 1. A truck body such as a crane or the like, on which a traveling body such as a crawler can be detachably attached, and a truck frame body on which a driver's seat can be mounted, receive a rotational reaction force of a vertical drilling machine such as a casing driver. In a truck frame configured to be used for a vehicle, a jack cylinder capable of supporting the track frame body instead of the traveling body is attached, and the shaft excavator is connected when receiving a rotational reaction force of the shaft excavator. A truck frame comprising a composite bracket integrally formed with a connecting portion for a vertical hole excavator and a connecting portion for a jack cylinder for connecting a jack cylinder to a truck frame body. 2. The track frame according to claim 1, wherein the composite bracket is detachably mounted when the composite bracket is mounted on the track frame body. 3. An arm for supporting the jack cylinder and attaching it to the composite bracket when the jack cylinder is connected to the connecting portion for the jack cylinder,
The track frame according to claim 1 or 2, wherein the arm is rotatably attached to a connecting portion for the jack cylinder.