JP2585785Y2 - Cabilt system - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for tilting a cab during an assembling process, and more particularly to a cab tilt apparatus which is excellent in operability and safety and can easily cope with various types of cabs.

[0002]

2. Description of the Related Art Most cabs of large vehicles are tilted at the time of maintenance and inspection for the purpose of improving workability. Although a wide variety of tilt structures have been employed in the related art, an example of a highly safe cab tilt structure is disclosed in Japanese Utility Model Laid-Open No. 61-147676. This tilt structure relates to a structure around a lock member of a lock mechanism that removably engages with an engagement opening of a tilt fixing stay that moves up and down in conjunction with the up and down movement of a tilt cylinder. Specifically, the lock member is The detection switch for detecting the tilt-up state is turned on and off in conjunction with the engagement / disengagement operation engaged with the engagement opening, thereby ensuring the safety of the cab at the time of tilt.

As described above, the cab tilt structure disclosed in the prior art is mounted on a completed cab, and no cab tilt device can be found during assembly.

Generally, in a vehicle assembling process, a cab is mounted on a frame, the fulcrum is connected to the frame, and then the cab is tilted, and various components arranged under the cab and components for a tilt structure of the cab are used. It is laid out to attach. Therefore, the tilt structure cannot be used for tilting the cab during the assembly process. Therefore, in the prior art, a cab tilt device 1a as shown in FIG. 9 is employed to tilt the cab during the assembly process. This cab tilt device 1a
Are roughly divided into a frame-side attachment 36, a screw shaft 37 detachably connected to the frame-side attachment 36, an elevating member 39 which is screwed up and down with the screw shaft 37 and has an insertion pin 38, and a screw shaft 37
And a cab-side attachment 42 detachably attached to the cab bracket 15 of the cab 14 and the like.

The cab tilt device 1a is engaged with the cab 14 in the following manner. That is, the screw shaft 37 that is suspended by the hoist 41 and stands by at the ascending position (the lifting member 3 is attached to the screw shaft 37).
9 is screwed in advance) and lowered by operating the pendant switch 43 shown in FIG. At the same time, the frame-side attachment 36 is fixed to the frame 25. Next, as shown in FIG. 9, the lower end of the screw shaft 37 is rotatably connected to the frame-side attachment 36. The cab side attachment 42 is connected to the cab bracket 15 of the cab 14. The motor 44 of the elevating member 39 is
The ball screw (not shown) screwed to the screw shaft 37 is rotated by the unit 45 shown in FIG. 4 to move the elevating member 39 to align the insertion pin 38 with the insertion hole 46 of the cab-side attachment 42. As shown in FIG. 11, the insertion pin 38 is inserted into the insertion hole 46 to connect the cab side attachment 42 to the screw shaft 37 side. Next, as shown in FIG. 10, the motor 44 is driven via the unit 45, and the cab 14 is tilted while the elevating member 39 is raised along the screw shaft 37.

[0006]

However, in the case of the cab tilt device 1a described with reference to FIGS. 9 to 11, there are the following problems. That is, first, the heavy (about 15 kg) frame-side attachment 36 is placed on the frame 25 manually or the like, which is dangerous and requires heavy work. Further, the cab side attachment 42 must be attached to the cab 14 side every time, which is troublesome. Further, it takes time to align and insert the insertion hole 46 of the cab side attachment 42 with the insertion pin 38 of the elevating member 39. Further, it is necessary to change many types of frame-side attachments 36 and cab-side attachments 42 in accordance with the type of the vehicle, which is extremely troublesome, and the maintenance and management thereof are also complicated. Furthermore, the adjustment of the tilt angle of the cab 14 requires a high level of skill because it depends on the intuition of the operator. In addition, during tilting of the cab, it is necessary to keep pressing the switch button to operate the motor 44, which is troublesome, and the elevating time of the elevating member 39 until the tilt is completed is long. Further, in the case of a new type vehicle such as a model chain, there is a problem that the setup time is extremely long, a large amount of man hour (MH) is required, and the operation rate of the line is reduced.

[0007] The present invention solves the above problems, there is no heavy object such as the frame side attachment, it is not necessary to change the cab side attachment corresponding to the vehicle type, and the device structure can be simplified. In addition, it is an object of the present invention to provide a cab tilt device that can perform quick work without requiring operational skill, has safety, can easily cope with a model change, etc., and can improve the line operation rate. I do.

[0008]

According to the present invention, in order to achieve the above object, the cab is tilted by being detachably engaged with a cab bracket of a cab in an assembling process in which a tilt fulcrum is connected to a frame. A height adjusting cylinder that is suspended and supported movably along a track, a tilt cylinder that is suspended by being connected to a rod of the cylinder, and is capable of swinging to the rod side of the cylinder. A cab mounting bracket that is connected to the cab bracket so that the free end side can be freely attached to and detached from the cab bracket; and controls the stroke of the vehicle height adjusting cylinder in accordance with the height position of the cab bracket.
A cab tilt device is provided which is provided with a control device for controlling the stroke of the tilt cylinder at a position corresponding to a predetermined type of tilt amount. The vehicle height adjusting cylinder and the tilt cylinder are characterized by a cab tilt device provided with a lock means for locking the rod at a predetermined position.

[0009]

The cab tilt device is transferred to the cab while the tilt cylinder is held at a predetermined length. The height adjusting cylinder is operated, and the cab mounting bracket that is swingably connected to the lower end of the tilt cylinder abuts on and engages with the cab bracket. In this state, the cylinder for adjusting the vehicle height is stopped, and when the locking means is provided, the cylinder is locked.
Next, a tilt stroke recorded in advance on the control device side is read, and the tilt cylinder is moved by the tilt stroke. Thereby, the cab is tilted to the predetermined tilt angle position. In this state, the tilt cylinder is stopped, and if the locking means is provided, it is locked. Since all of the above operations are performed automatically, the tilt operation can be performed very easily and quickly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall structure of this embodiment, FIG. 2 is a block diagram mainly showing a control system, and FIGS. 3 and 4 are detailed structures of a cab mounting bracket of this embodiment and engagement with the cab bracket. FIG. 5 to FIG. 7 are side views for explaining the operation of the present embodiment, and FIG. 8 is a flowchart for explaining the operation of the present embodiment.

As shown in FIG. 1, a cab tilt device 1 of this embodiment includes a vehicle height adjusting cylinder 2, a tilt cylinder 3, a cab mounting bracket 4, and a control device 5 as main components. As shown in FIG. 2, the cylinder 2 for height adjustment is provided with a lock means 6 and an electromagnetic switching valve 7, and the cylinder 3 for tilt is provided with a locking means 8, an electromagnetic switching valve 9 and a stroke sensor 10. You. As will be described in detail later, the cab mounting bracket 4
Is provided with a proximity sensor 11, and a pressure source 12 connected to the electromagnetic switching valves 7, 9 is provided with a controller 13 for controlling the locking means 6, 8, respectively. As shown in FIG. 1, a cab bracket 15 is fixed to the rear of the cab 14, and the cab 14 is supported by a frame 25 (FIG. 7) so as to be tiltable about a tilt fulcrum 16.

The height adjusting cylinder 2 is movably suspended by an I-beam 17 via a roller 18, and a frame 19 is fixed to the lower end surface. Guide blocks 21 and 21 are fixed to the bottom plate 20 of the frame 19 and the operation panel 22 is fixed.
Are linked.

The tilt cylinder 3 has an upper end connected to a piston rod 23 of the vehicle height adjusting cylinder 2, and a stroke sensor 10 is attached to a lower end. The piston rod 24 of the tilt cylinder 3 is connected to a support plate 26. Guide shafts 27, 27 are erected and fixed to the support plate 26, and the distal ends of the guide shafts 27, 27
It is slidably supported by 1, 21.

As shown in FIGS. 1, 3 and 4, the cab mounting bracket 4 includes an arm portion 28 and a cab mounting attachment 29 and the like. The base portion of the arm portion 28 is fixed to the support plate 26, and the base end portion of the cab mounting attachment 29 is pin-coupled to the front end side by a support pin 30 so as to swing. Attachment for cab mounting 29
A V-shaped seat plate portion 31 that abuts and engages with the cab bracket 15 and a locking pin 32 that is fixed to the center of the seat plate portion 31 are disposed at the tip of the cab 14 side. An elastic member 33 is attached to the front side of the seat plate portion 31 to reduce a shock at the time of contact with the cab bracket 15 side. The cab bracket 15 is provided in the hole 34 of the elastic member 33.
Proximity sensor 11 for detecting contact between the elastic member 33 and the elastic member 33 is provided. The locking pin 32 is inserted into and engaged with the hook 35 on the cab bracket 15 side.

As shown in FIG. 2, the electromagnetic switching valves 7 and 9 for bringing the pressure medium into and out of the cylinder 2 for adjusting the vehicle height and the cylinder 3 for tilting are connected to the pressure source 12 and are controlled by the control device 5 for switching. Lock means 6, 8 for the cylinder 2 for adjusting the vehicle height and the cylinder 3 for tilting.
Is connected to the control device 5 via the controller 13 to automatically control the lock timing. Further, as shown, the stroke sensor 10 and the proximity sensor 11 are all connected to and controlled by the control device 5 side.

Next, the operation of tilting the cab according to this embodiment will be described with reference to the flowcharts of FIGS. 2, 5 to 7 and 8. First, in the initial state of step 100, as shown in FIG. 5, the vehicle height adjusting cylinder 2 is activated, and the piston rod 24 of the tilt cylinder 3 is held at a predetermined length (step 100). In response to a cab tilt start instruction (step 101), the vehicle height adjusting cylinder 2 is operated to move the piston rod 23 to align the cab bracket 15 with the cab mounting bracket 4 (step 102). This state is shown in FIGS. 3, 4 and 6, wherein the cab bracket 15 abuts on the elastic member 33 and the locking pin 32
5 and the two are connected. In this state, the proximity sensor 11 is turned on (step 103), and a detection signal is input to the control device 5 side. In response to this detection signal, the controller 13 (FIG. 2) operates the locking means 6 to lock the vehicle height adjusting cylinder 2 (step 104). Next, the control device 5 reads a tilt stroke (L) stored in advance corresponding to the cab 14 (step 105),
The tilt cylinder 3 is operated by at least one kind of tilt stroke (L) via the electromagnetic switching valve 9 (FIG. 2) (step 106). When the piston rod 24 of the tilt cylinder 3 moves in the contracting direction, a displacement between the cab mounting bracket 4 and the cab bracket 15 occurs in the vertical and longitudinal directions. Therefore, the cab attachment 2
9 rotates around the indicating pin 30 and swings, and the roller 18 moves along the I-beam 17. Thereby,
As shown in FIG. 7, the cab 14 is tilted about the tilt fulcrum 16 while the connection between the cab mounting bracket 4 and the cab bracket 15 is maintained without difficulty. Here, as shown in FIG. 8, it is determined whether or not the tilt cylinder 3 has been stroked by the read tilt stroke (L) (step 107). The tilt stroke (L) is detected by the stroke sensor 10. In the case of yes, it is determined that the cab 14 has been tilted to the target rotation angle, and the controller 13 operates the locking means 8 to lock the tilt cylinder 3 (step 108), and stably supports the cab 14 in the tilt posture. The process ends (step 109). Thereby, the next assembling process can be performed without any trouble. If no, the process returns to step 106 to continue the operation of the tilt cylinder 3.

As described above, according to the cab tilt device 1 of the present embodiment, the cab tilt operation can be automatically and easily performed.
And done quickly.

In the above description, each component has been described by omitting a detailed structure and displaying a functional structure, but a known technology is applied to the detailed structure. In addition, the present invention is not limited to the above-described embodiment, and may be applied to a technical range that does not depart from the gist of the present invention. In the present invention, two cylinders, the cylinder 2 for adjusting the vehicle height and the cylinder 3 for tilting, are used, and the cab tilt using a single cylinder is not adopted. That is, if the height adjustment and the tilt are shared by a single cylinder, the stroke origin changes each time the cylinder is used even if the tilt angle stroke (L) is stored, and the learning function of the cylinder controller of the control device is reset each time. Unless the correction operation is performed, a correct tilt stroke cannot be obtained. When the correction operation is performed, the work time is required correspondingly, and the work efficiency is reduced. To prevent the above problems, two cylinders are employed to improve the working efficiency and the operating rate.

[0019]

According to the present invention, the following remarkable effects are obtained. 1) The cab tilt device according to the present invention has a structure in which a cylinder for height adjustment, a cylinder for tilt, and a bracket for cab mounting are integrally connected to each other. There is no extra work such as connection work. Therefore, the operation is extremely easy and is performed in a short time. 2) Since the setup time for a vehicle type change or model change is short, work time and man-hour (MH) are reduced, and the operation rate can be improved. 3) The state in which the cab mounting bracket is in contact with the cab bracket is accurately detected, and the cab is tilted based on a tilt stroke stored in advance. To tilt the cab. 4) A cab mounting bracket is provided on the device side, so there is no need to prepare cab side attachments according to the vehicle model, and it is not necessary to prepare several types of heavy-weight frame side attachments, and work management and maintenance management are smooth. And work environment can be improved. 5) Since the device structure is simple, it is compact and
It can be implemented at low cost.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an entire structure of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a control system of the present embodiment.

FIG. 3 is a side view showing a detailed structure around the cab mounting bracket and the cab bracket engaged with the cab mounting bracket according to the embodiment.

FIG. 4 is a front view as viewed in the direction of the arrow A in FIG. 3;

FIG. 5 is an explanatory side view for explaining an initial state of a tilt operation of the cab according to the embodiment.

FIG. 6 is an explanatory side view showing a state in which the cab mounting bracket and the cab bracket according to the embodiment are in abutting engagement.

FIG. 7 is an explanatory side view for explaining a cab tilt operation according to the embodiment.

FIG. 8 is a flowchart for explaining the operation of the present embodiment.

FIG. 9 is a perspective view showing the entire structure of a conventional cab tilt device.

FIG. 10 is a schematic side view showing a cab tilt operation by a conventional cab tilt device.

FIG. 11 is a partial top view showing an engagement state between a cab-side attachment and an elevating member of a conventional cab tilt device.

[Explanation of symbols]

 Reference Signs List 1 cab tilt device 2 cylinder for height adjustment 3 cylinder for tilt 4 cab mounting bracket 5 control device 6 locking means 7 electromagnetic switching valve 8 locking means 9 electromagnetic switching valve 10 stroke sensor 11 proximity sensor 12 pressure source 13 controller 14 cab 15 cab Bracket 16 Tilt fulcrum 17 I-beam 18 Roller 19 Frame 20 Bottom plate 21 Guide block 22 Operation panel 23 Piston rod 24 Piston rod 25 Frame 26 Support plate 27 Guide shaft 28 Arm unit 29 Cab mounting attachment 30 Support pin 31 Seat plate 32 Locking pin 33 Elastic member 34 Hole 35 Hook

Claims (2)

(57) [Scope of request for utility model registration] 1. A cab tilt device for tilting a cab by detachably engaging with a cab bracket of a cab in an assembling process in which a tilt fulcrum is connected to a frame, the cab being tilted and movably supported along a track. A cylinder for height adjustment, a tilt cylinder connected to a rod of the cylinder, and a tilt cylinder connected to the rod side of the cylinder so as to be able to swing, and a free end side is detachably attached to the cab bracket. And a stroke control of the vehicle height adjusting cylinder in accordance with a height position of the cab mounting bracket and a height of the cab bracket, and a stroke control of the tilt cylinder to a position corresponding to at least one type of predetermined tilt amount. A cab tilt device comprising a control device. 2. A cab tilt apparatus according to claim 1, wherein said vehicle height adjusting cylinder and said tilt cylinder are provided with locking means for locking their rods at predetermined positions.