JPH0450086A - Counterbalanced fork lift and manufacture thereof - Google Patents

Abstract

PURPOSE:To facilitate assembly by fixing a bracket for fixing a rear pillar on the upper face of a counter weight to a hanging hole of the counter weight for fixing the rear pillar to the counter weight for the purpose of supporting a head guard. CONSTITUTION:In a fork lift truck, a front pillar 21 for supporting a head guard 20 is fixed to a frame 10 with bolts 23, and a rear pillar 22 is temporarily fixed through a par of right and left jigs 30 consisting of plate-like materials respectively having a step part to the rear part of the frame 10. After drive systems, various types of auxiliary machines are assembled in a mass production line, a counter weight 70 is loaded to the machine-bed temporarily fixing the head guard 20 to the frame 10. Furthermore, after a nearly plate-like bracket 80 having a nut part 82 for fastening a bolt 83 for fixing the rear pillar 22 is fixed to a hanging hole of the counter weight 70 with bolt and nut 81 so that the bracket is in face-contact with the upper face of the counter weight 70, the jigs 30 are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure and manufacturing method of a counterweight type forklift truck.

(Prior Art) A conventionally common forklift truck having four head guard billers is fixed to its pillar frame. However, in forklift trucks where space cannot be secured to fix the rear pillar to the frame, the counterweight has been tapped to fix the rear pillar to the counterweight.

By the way, as shown in FIG. 10, mass-produced counterweight type forklift trucks have a head guard 2o fixed to a frame 10 suspended from a conveyor 50 to transport the rear axle, steering rod, drive unit, front axle, tires, etc. (temporarily referred to as the drive system 6o), and after unloading from the conveyor 50 and assembling various auxiliary equipment, the counterweight 7
0 is placed. Now, in forklift trucks that cannot secure the space to fix the rear pillar to the frame, as mentioned above, the rear pillar is fixed to the counterweight, so
It is not possible to install a head guard in advance. In order to manufacture such machines on a mass production line, conventionally a head guard consisting of only two front pillars was temporarily attached to the frame. After placing it on the mass production line and assembling the drive system, etc., remove the temporarily attached bed guard, tap the holes for fixing the rear pillar to the counterweight, and insert the four The original Heradguard with head guard pillars was fixed to the frame with bolts for the front pillar and to the counterweight for the rear pillar.

(Problems to be Solved by the Invention) However, tapping a counterweight is a very time-consuming task, and the material of the counterweight is not necessarily suitable for tapping. Further, as mentioned above, the manufacturing method of temporarily attaching another herad guard and then replacing it later was also a very time-consuming and inefficient method.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a counterbalanced forklift truck of a type that does not take unnecessary effort during assembly and does not allow a space for fixing a rear pillar to a frame, and a method for manufacturing the same. This is a technical problem to be solved.

(Means for Solving the Problems) The present invention takes the following measures to solve the above problems.

That is, in the first invention, in a forklift truck of a type in which a front pillar for supporting a helad guard is fixed to a frame and a J Noah pillar is fixed to a counterweight, a rear pillar fixing device arranged on the upper surface of the counterweight is placed in a counterweight hanging hole. Fixed the bracket. Further, in the second invention, in a forklift truck in which a rear pillar for supporting a head guard is fixed to a counterweight, the front pillar is fixed to the frame and the rear pillar is temporarily attached to the frame using a jig, and the temporary attachment is We adopted a manufacturing method in which the drive system was assembled in this state, and then a counterweight was placed, the jig was removed, and the rear pillar was fixed to the counterweight.

(Function) According to the counterbalanced forklift truck and the manufacturing method thereof of the present invention using the above-described means, the helad guard is attached to the machine base via a jig from the beginning of the assembly line, and the bracket is removed after the counterweight is placed. The rear pillar of the herad guard is fixed to the counterweight through the screw.

(Example) Hereinafter, an example embodying the present invention will be described based on FIGS. 1 to 9.

In the forklift trunk according to the present invention, as shown in FIG. 1, a front pillar 21 is fixed to a frame IO with a bolt 23, and an avilar 22 is a pair of left and right jigs in the shape of a plate having a step. 30 and bolts 33 to fix the tack to the rear of the frame IO (see FIGS. 2 and 3). rear pillar 22
As shown in FIG. 6, a bracket 24 is welded to the bracket 24, and the rear pillar 22 is temporarily fixed by screwing a screw hole 25 provided in the bracket 24 with a marking bolt 33. At this time, the size and shape of the jig 30 are determined so that the lower end of the rear pillar 22 is located slightly above the completed position (the position in contact with the upper surface of the counterweight when the counterweight is mounted). It is only temporary that the temporary attachment is fixed in a position that is shifted from the position when completed, and the amount of shift is as follows: front pillar 21 degrees, rear pillar 22 degrees. There is no problem because the problem is solved by the deflection of the head guard 2o. Note that 31 in the figure is an arm for holding the jig 30. The machine base with the head guard 20 temporarily attached and fixed to the frame 10 as described above is placed on the conveyor 50 of the mass production line, as shown in FIG. 4, and the drive system 60 is attached thereto. Thereafter, various other auxiliary machinery and the like are assembled on the mass production line, and the counterweight 70 is placed. At this time, as mentioned earlier, the lower end of the rear pillar 22 is in the completed position, that is, higher than the top surface of the counterweight when the counterweight is mounted, so it may interfere with the work of mounting the counterweight 70. There isn't. After placing the counterweight 70, a substantially bullet-shaped bracket 80 having a nut portion 82 for tightening a bolt 83 for fixing the rear pillar 22 is inserted into the hanging hole 71 of the counterweight 70 using a bolt nut 81. (See Figure 5). After that, the jig 30 that temporarily fixed the rear pillar 22 is removed, the rear pillar 22 is brought to the completed position, and the rear pillar 22 is fixed via the bracket 24 by screwing the bolt 83 and the nut part 82 together. (See Figure 6).

According to the forklift truck and its manufacturing method configured as described above, since the hanging hole 71 of the counterweight 70 is used when fixing the rear pillar 22, there is no need to tap the counterweight 70, and the efficiency of assembly is improved. . Also, counterweight 7
The fear of drying out due to the material used is also eliminated. Furthermore, the above-mentioned V method can significantly reduce the labor involved in manufacturing a forklift truck in which the rear pillar is fixed to a counterweight.

It should be noted that the present invention is not limited to the above-described embodiment, and for example, the rear pillar 22 and the frame 10 may be temporarily fixed using a left and right integrated jig 35 as shown in FIG. In this case, the temporary attachment work can be performed more easily. Further, the front pillar 21 may be fixed by other methods than the bolts 23, such as welding. Alternatively, the temporary attachment of the rear pillar 22 can be done by providing a key-shaped pin 85 and keyholes 86 and 87 that fit the pin 85 in the jig 30 and the rear pillar 22, respectively, as shown in FIG. It is also possible to improve work efficiency by having a configuration in which members can be attached and detached with a small number of operations, such as engaging and disengaging by rotating them around an axis. Furthermore, the bracket attached to the counterweight 70 does not have to be an integral type like the bracket 80. For example, as shown in FIG. 9, a bolt 92 having a substantially cubic bracket 90 having a through hole 91 may be fixed to the counterweight 70, and a bolt 93 may be used to fix the rear pillar 22.

In the manufacturing method, as described in the embodiments, it is not necessarily necessary to set the fixing position of the rear pillar 22 at a higher position than the completed position when temporarily attaching the rear pillar 22. For example, if the jig 30 is set to temporarily fix the rear pillar 22 in the completed position, remove the jig 30 before placing the counterweight 70, and install the head guard 20 from above using a hoist crane. The counterweight 70 may be placed while pulling it with a tool such as a screwdriver.

(Effects of the Invention) As detailed above, according to the present invention, when manufacturing a counterbalanced forklift trunk of a type in which a space for fixing a rear pillar to a frame cannot be secured, the first invention involves processing a counterweight. The second invention provides a manufacturing method that saves time and effort and is easily adaptable to mass production lines.

[Brief explanation of drawings]

1 to 9 are drawings representing embodiments of the present invention,
Figure 1 is a side view showing the state in which the Herad Guard is fixed to the frame, Figure 2 is a partial side view showing the state of the jig when tacking is done, and Figure 3 is a side view showing the state of the jig when tacking is done. A partial front view showing the state of the jig, Fig. 4 is a side view schematically showing the state when the line is assembled, and Fig. 5 is a part showing the state where the counterweight is placed with the helad guard temporarily attached. A cross-sectional side view, FIG. 6 is a partial perspective view from the rear of the machine illustrating the installed state of the pillar when completed, and FIG. 7 is a partial front view showing the state of the jig during temporary attachment according to another embodiment. FIG. 8 is a partial perspective view showing temporary fixing means according to another embodiment, and FIG. 9 is a partially sectional front view showing a fixed state of the rear pillar according to another embodiment. FIG. 1O is a side view schematically showing the state of a conventional general forklift truck assembly line. 10... Frame 20... Head guard 21 Fist/bite Front flyer 22... Rear flyer 30... Jig 60... Drive system 70... Counter weight 71... Hanging hole 80... bracket

Claims (2)

[Claims] (1) In a forklift truck in which the front pillar for supporting the head guard is fixed to the frame and the rear pillar is fixed to the counterweight, a bracket for fixing the rear pillar placed on the top of the counterweight is fixed to the counterweight hanging hole. A counterbalanced forklift truck characterized by: (2) In a forklift truck in which the rear pillar for supporting the head guard is fixed to a counterweight, the front pillar is fixed to the frame, the rear pillar is temporarily attached to the frame using a jig, and the drive system is 1. A method for manufacturing a counterbalance forklift truck, which comprises: assembling a counterweight, then mounting a counterweight, removing the jig, and fixing a rear pillar to the counterweight.