JPH04173483A - Counterweight device for industrial vehicle - Google Patents

Abstract

PURPOSE:To positively prevent the damage of other equipment at the time of suspending/removing a counterweight by providing guide faces for changing the fitting/removing locus of the counterweight by mutual colliding contact in order to avoid the interference with other equipment at the time of suspending/removing the counterweight. CONSTITUTION:This counterweight device is formed of weight hangers 20, 30 rigidly secured to the left and right parts of a frame rear end part 1, and a counterweight 40 provided with insert holes 41, 42 for inserting the respective weight hangers 20, 30. A first guide face 30b inclined slightly upward toward the tip side from the root side and a second guide face 30c continued from the first guide face 30b and inclined further upward are formed at the lower end of each of the weight hangers 20, 30. On the other hand, a first guided face 42b inclined slightly upward toward the inner direction from the tip side and a second guided face 42c continued from the first guided face 42b and inclined further upward are formed at the lower ends of each insert hole 42 (41) of the counterweight 40. At the time of suspending/removing the counterweight 40, its fitting/removing locus can be thereby changed to avoid the interference with other equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a counterweight device for an industrial vehicle such as a forklift.

[Conventional technology]

In a general industrial vehicle, for example, a battery-powered forklift shown in FIG. 9, a counterweight device 2 is held on a frame 1 at the rear of the vehicle as a counterweight device. As shown in FIG. 1O, this conventional counterweight device 2 includes a weight hanger 80 that is fixed to the rear end portion 1 of the frame and has an upward protrusion 81, and a downward recess 91 that is engaged with the protrusion 81. It consists of a counterweight 90 that is held by the weight hanger 80 with a concave part 91 engaged with the holding protrusion 81.

[Problem to be solved by the invention]

However, with conventional counterweight devices, when the counterweight is suspended and removed using a hoist for maintenance of industrial vehicles, etc., the counterweight is moved along an up and down trajectory, so the counterweight is not placed near the counterweight. There was a risk that the counterweight could damage the rear combination lamp, damper, muffler tail vibe, controller, and other equipment. For example, in the case of the above-mentioned battery-powered forklift, the rear pillar 11 of the head guard is provided with a rear combination lamp 3 and a damper 4, and a controller 5 is provided inside a counterweight 90. For example, if the counterweight 90 is suspended upward, the suspended counterweight 95 will be attached to the rear combination lamp 3.
, the damper 4 and the controller 5, and there was a risk of damaging them. For this reason, preventive measures have been taken in the past, such as installing guards on them and providing instructions on how to protect them in work manuals, etc. However, even with these preventive measures, there are problems such as damage to the guards and insufficient guidance. According to
It was difficult to completely prevent damage to equipment.

An object of the present invention is to reliably prevent damage to other equipment when suspending and removing a counterweight.

[Means to solve the problem]

In order to solve the above-mentioned problem, the counterweight device for an industrial vehicle of the present invention includes a counterweight on at least one of the weight hanger and the counterweight in order to avoid interference with other equipment when the counterweight is suspended and removed. A novel method is adopted in which a guide surface is provided that changes the attachment/detachment locus of the counterweight by mutual collision.

[Effect]

In the counterweight device for an industrial vehicle of the present invention, when the counterweight is suspended and removed using a hoist for maintenance of the industrial vehicle, etc., the weight hanger and the counterweight are small (both the guide surfaces of one of them are in contact with each other). By touching the counterweight, the attachment/detachment trajectory of the counterweight is changed to avoid interference with other equipment.

〔Example〕

Embodiments embodying the present invention will be described below with reference to the drawings.

This counterweight device is employed in a battery-powered forklift shown in FIG. 9, and is held on a frame 1 at the rear of the vehicle. For convenience of explanation, the same reference numerals as those in FIG. 10 are given to the components common to the conventional one.

As shown in FIG. 3, this counterweight device includes weight hangers 20 and 30 fixed to the left and right sides of the frame rear end 1 with their tips extending toward the rear of the vehicle, and each weight hanger 2.
0.30 and a counterweight 40 having insertion holes 41, 42 which are bored in the rearward direction facing each other and into which each weight hanger 20, 30 is inserted.

The weight hanger 20.30 has an upward protrusion 2 on the upper end.
0a, 30a are formed, and as shown in FIG. A second guide surface 30c that is continuous with the guide surface 30b and slopes upward toward the distal end side is formed. A similar first guide surface and second guide surface are formed on the weight handle 20 as well.

At the upper end of the insertion hole 42 of the counterweight 40, as shown in FIG. is formed with a first guided surface 42b that slopes slightly upward toward the rear from the tip side, and a second guided surface that is continuous with the first guided surface 42b and slopes more upward toward the rear. A guide surface 42c is formed. The insertion hole 41 is also formed with a similar recess, a first guided surface, and a second guided surface. Further, as shown in FIGS. 1 and 3, this counterweight 40 is provided with a central hole 43 in the center thereof to avoid interference with the controller 5. This center hole 4
The bottom tip side of No. 3 is an inclined surface 43a that slopes downward toward the tip side. Furthermore, this counterweight 40 has a recess 44 having a support rod 44a on which a hook such as a hoist is hung at the upper end, notches 45 and 46 at both upper ends to avoid interference with the damper 4, and a frame 1 at the lower end. and the counterweight 40 with bolt holes 4.
7.48 is formed.

In this counterweight device configured as described above, a hook of a hoist or the like is hooked to the support rod 44a of the recess 44 of the counterweight 40 during maintenance or the like.

Then, if a hoist or the like is driven, the weight hanger 20.30 (7) Ju guide surface 30b is
until the first guided surface 42b of the counterweight 40 abuts, and the second guided surface 30c of the weight hangers 20, 30 abuts the second guided surface 42c of the counterweight 4o, that is, as shown by the arrow in FIG. Only the direction and distance shown in A,
The counterweight 40 rises vertically. This results in
The recessed part of the insertion hole 41 is pulled out from the protrusion 20a, and the protrusion 30
The recess 42a of the insertion hole 42 is pulled out from a.

At this time, the rear combination lamp 3 does not interfere with the upper surface of the counterweight 40. Further, the controller 5 and the damper 4 do not interfere with the counterweight 40 because of the inclined surface 43a of the central hole 43 and the notches 45 and 46, respectively.

If the hoist or the like is continued to be driven, the second guide surface 30c with a weight handle of 20.30 and the second guided surface 42c of the counterweight 40 will separate, as shown in FIG.
The weight hanger 2o, the 3° first guide surface Sob and the first guided surface 42b of the counterweight 4o slide, and the 8th
The counterweight 40 rises diagonally in the direction and distance shown by arrow B in the figure. As a result, the damper 4 avoids the counterweight 40 and is extracted from the notch 45, 46, and the controller 5 avoids the counterweight 40 and is extracted from the central hole 43.

Further, if the hoist or the like is continued to be driven, the second guide surface 30 of the weight hanger 20.30 will be moved as shown in FIG.
c and the end of the first guided surface 42b of the counterweight 40 slide in the direction and distance shown by the arrow C in FIG.
The counterweight 40 rises more obliquely. As a result, the rear combination lamp 3 is separated from the upper surface of the counterweight 40, as shown in FIG.

Even if a hoist or the like is subsequently driven to vertically raise the counterweight 40 as shown by the arrow in FIG. Since these are located at non-contact positions, they will not be damaged by the counterweight 40.

Note that even when the counterweight 40 is lowered, the same operation and effect can be obtained by only performing the opposite operation.

Furthermore, the guide surfaces and guided surfaces in each of the above embodiments may have a smooth shape, and although the present invention was applied to a battery-powered forklift in the above embodiment, it goes without saying that it can be applied to an engine-powered forklift. .

〔Effect of the invention〕

As detailed above, in the counterweight device of the present invention, even if the counterweight is suspended and removed using a hoist for maintenance of industrial vehicles, etc., the counterweight is guided to avoid interference with other equipment. Since the surface changes the locus of attachment and detachment of the counterweight, damage to the equipment can be reliably prevented.

[Brief explanation of drawings]

1 to 8 relate to a counterweight device of one embodiment,
Fig. 1 is a sectional view during holding, Fig. 2 is a sectional view during operation, Fig. 3 is an exploded perspective view, Fig. 4 is an enlarged sectional view during holding, Figs. 5, 6, and 7. 8 is an enlarged sectional view during operation, and FIG. 8 is an explanatory diagram showing the moving direction and moving distance during each operation. FIG. 9 is a side view of a general battery-powered forklift. FIG. 10 is a sectional view of a conventional counterweight device. 1... Frame rear end 3... Rear combination lamp 4... Damper 5... Controller 20.
30... Weight hanger 20a, 30a... Protrusion 30b... First guide surface 30c... Second guide surface 40
... Counterweight 42a ... Concave portion 42b ... First guided surface 4
2c...Second guided surface patent applicant Toyota Industries Corporation representative
Patent Attorney Hiroshi OkawaFigure 3

Claims (1)

[Claims] (1) A weight hanger that is fixed to the rear end of a frame of an industrial vehicle and has an upward protrusion, and a downward recess that is engaged with the protrusion, and the weight hanger that is engaged with the protrusion. In a counterweight device for an industrial vehicle, at least one of the weight hanger and the counterweight is mutually connected to each other in order to avoid interference with other equipment when the counterweight is suspended and removed. 1. A counterweight device for an industrial vehicle, comprising a guide surface that changes the attachment/detachment locus of the counterweight by collision with the counterweight.