JPH0295698A - Loading and unloading device of forklift - Google Patents

Abstract

PURPOSE:To simplify the replacement of attachments by providing a baggage handling member installed to an attachment main body so as to take a specific operational posture when it is installed to an elevating member. CONSTITUTION:A fork 26 and a cramp plate to be baggage handling members of attachments 21 such as a side shift fork, a hinged fork, and the like are made in a common use member by composing them to take a specific operational posture by utilizing the torque of a rotary shaft 24. And by composing to deliver the torque of an operation device 8 provided at a holder device 3 side to the attachment 21 side through clutches 16a and 16b, the attachment 21 can be mounted or released. And moreover, the mounting and the release of the attachment 21 is carried out by extending and contracting a hydraulic cylinder 6 for mounting and releasing provided at the holding device 3 side, and inserting and removing a lock pin 7 with flange to the pin hole 23 of the attachment main body 22, and the attachment can be replaced easily on the driver seat.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cargo handling device for a forklift, and particularly to a cargo handling device suitable for replacing attachments.

<Prior Art> A forklift is a cargo handling device that uses various attachments to handle various cargo handling operations. Such attachments are usually used in place of or in addition to forks, and for example, side shift forks, damping forks, or clamp forks, which are members that directly handle loads, such as forks or clamp arms, are used to attach the load handling part to the fork or clamp arm. In many cases, it causes a predetermined operating form to be taken for a task. and,
These types of attachments always require an actuating device to operate the forks and clamp plates that serve as cargo handling members, and the actuating device uses a hydraulic cylinder or hydraulic motor, etc. It has become common to do so.

(Problem to be solved by the invention) By the way, it is desirable that forklift attachments be easily replaceable in accordance with the type of cargo handling work, but in reality, replacement is troublesome, so some With the exception of , attachments are treated as fixed objects, and a large number of forklift trucks equipped with attachments corresponding to the type of work are often prepared to handle various types of work. however,
Preparing a large number of specialized vehicles for each type of work not only increases equipment costs but is also not effective in terms of operating efficiency. For this reason, it is sometimes necessary to replace the attachment, for example, replacing the side shift fork with a clamp fork or damping fork. In some cases, modifications such as adding or removing valves may be required. Therefore, conventional forklift cargo handling devices have a problem in that attachments cannot be easily replaced.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a forklift cargo handling device that allows attachments to be easily replaced.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes an elevating member that ascends and descends along the mast, a cylinder for an attachment ll12s attached to this elevating member, and a telescopic operation of the cylinder. It is provided with a detaching means for connecting or detaching the attachment from the elevating member, an actuating device for operating the attachment installed on the elevating member, and a clutch capable of transmitting the rotational force of the actuating device to the attachment side when the attachment is installed, The attachment is suspended horizontally on the attachment body, and has a rotating shaft that can be rotated via the clutch when attached to the elevating member, and is attached to the attachment body so that a predetermined operating mode can be achieved by rotation of the rotating shaft. The structure includes a baggage handling member.

(Function) Therefore, the attachment and detachment of the attachment to and from the elevating member is carried out through the attachment and detachment means by telescopically operating the cylinder for attaching and detaching the attachment. do. On the other hand, when the attachment is attached to the elevating member, the actuating device for operating the attachment installed on the elevating member can be connected to the rotating shaft on the attachment side via the clutch. By driving and rotating the rotation shaft, it is possible to cause the cargo handling member in the attachment to assume a predetermined operating mode. That is, when the attachment is a side shift fork, for example, it can perform a side shift operation of the fork, and when it is a damping fork, it can perform a damping operation of the fork.

(Example) Hereinafter, an example of the present invention will be specifically described based on the drawings. The cargo handling device basically consists of a support device 3 for an attachment that moves up and down along the seven strokes 1 of the forklift as shown in FIG. 1, and an attachment 21 that can be attached to this support device 3. There is.

The support device 3 will be explained below. The support device 3 includes a sub-lift bracket 4 formed in a U-shape in plan view by a front plate portion 4a having a horizontally long rectangular shape and side plate portions 4b protruding forward from the left and right ends of the front plate 4a. This sub-lift bracket 4 is moored via seven hooks 5 to the front surface of a lift bracket 2 that moves up and down along the mast 1 of the forklift. Further, two left and right hydraulic cylinders 6 for attaching and removing attachments are fixed vertically and in parallel on the front surface of the front plate part 4a, and both of these hydraulic cylinders 6 are of a double piston type, with both upper and lower pistons. A flanged lock bin 7 is provided at each end of the rod 6a. However, these flanged lock bins 7 are
As shown in the figure or FIG. 3, it constitutes an attachment/detachment means for connecting and detaching the attachment 21 to the sub-lift bracket 4 by inserting it into the bottle hole 23 formed in the attachment 21. . Note that at least one side plate portion 4b of the sub-lift bracket 4 is formed in a rectangular box shape.

A side plate portion 4b formed in a box shape
An actuating device 8 for actuating the attachment is attached to the. As shown in FIG. 4, this actuating device 8 uses a hydraulic or electric motor 9 fixed on the outside of the box as a driving source, and is constructed with a chino transmission mechanism 10 installed inside the box as the main body. . That is, the configuration is such that a chain wheel 13 is attached to a drive sprocket 11 driven by a motor 9 and a driven sprocket 12 attached to an output shaft 14, and the driven sprocket 12 is axially connected to the output shaft 14. They are coupled via a key 15 for relative movement. In addition, the driven sprocket 12 and the output shaft 1
4, spline fitting may be used instead of the key 15 connection method.

Thus, the rotational force of the output shaft 14 is transmitted to the rotating shaft 24 of the attachment 21 via the clutch 16. That is, the clutch 16 specifically includes a driving clutch plate 16a attached to the inner end of the output shaft 14 penetrating from the box, and a driven clutch plate 16b attached to one end of the rotating shaft 24. Both clutch plates 16a and 16b are coupled by pushing the output shaft 14 toward the rotating shaft 24.

For this purpose, the output shaft 14 is supported via a suitable bearing 17 so as to be rotatably and axially movable relative to the box-shaped side plate portion 4b.
The shaft is moved in the axial direction by a hydraulic shift cylinder 18 mounted on the outside of the shaft. Note that the piston rod 18a of the shift cylinder 18 and the output shaft 14 are coupled via a suitable bearing 19 so as to be able to rotate relative to each other. In addition, the driven sprocket 12 has a spacer 2
Axial movement is prevented through 0.

The hydraulic cylinder 6, motor 9, and shift cylinder 18 attached to the support device 3 are configured to be operable from the driver's seat.

Next, the attachment 21 that can be attached to and detached from the support device 3 configured as described above will be explained.

First, the attachment 21 shown in FIG. 1 will be explained. This attachment 21 is a side shift fork, and the attachment body 22 has a width so that it fits between the left and right side plate portions 4b of the sub-lift bracket 4. The established facade consists of a gate-shaped frame board.

The attachment main body 22 is provided with four bin holes 23 on the left, right, top and bottom of the rear side thereof, which correspond to the flanged lock bins 7 as attachment/detachment means.

In addition, the left and right horizontal plates 22 in the attachment main body 22
A rotating shaft 24 is horizontally suspended near the upper part of the space 8, and both left and right ends and the center are rotatably supported by bearings 25, and this rotating shaft 24 has one end connected to the clutch 16. A driven clutch plate 16b is provided, and a screw 24a is provided on the outer periphery. In addition, the rotation axis 2
4 is the output shaft 1 of the actuating device 8 when the attachment body 22 is attached to the sub-lift bracket 4.
Its position is set to be concentrically aligned with 4.

Left and right forks 26, which are cargo handling members, are screwed onto the rotating shaft 24 via a nut member 27 provided at the top, and are attached so that they are both moved in the same direction by the rotation of the rotating shaft 24. Further, its movement is guided by a guide rod 28 horizontally fixed below and parallel to the rotation @24.

The side shift fork serving as the attachment 21 is configured as described above, and therefore, the attachment body 22 is inserted between the left and right side plate portions 4b of the sub-lift bracket 4 that is connected to the support device 3 described above. In the operated state, if the hydraulic cylinder 6 for attachment/detachment is extended and each lock pin 7 is inserted into the pin hole 23 of the attachment main body 22, the side of the attachment 21 will open as shown in FIGS. 2 and 3. A shift fork is attached to the support device 3.

In this installed state, if the output shaft 14 is pushed by extending the shift cylinder 18 and the driving clutch plate 16a is pressed against the driven clutch plate 16b of the rotating shaft 24, the power on the actuating device side is released. Since the transmission is possible to the attachment side, in such a state, by appropriately operating the motor 9, the rotating shaft 24 can be rotated via the chino transmission mechanism 10, and the fork 26 can be side-shifted left and right.

The detachment of the side shift fork from the support device @3 is carried out by retracting the hydraulic cylinder 6 for detachment and removing the flanged lock pin 7 from the pin hole 23.

Next, the attachment 21 shown in FIG. 5 is a hinged fork, and the fork 26, which is a cargo handling member, is fixed to a lower rotating shaft 29 that is rotatably supported horizontally between the left and right sides 122a of the attachment body 21. has been done. This lower rotating shaft 29 is configured to be rotated via a chino 30 from a rotating shaft 24 with a clutch plate 16b mounted above it (but without a screw). Note that the attachment body 21 has the same configuration as that of the side shift fork described above, and therefore, attachment and detachment to and from the support device 3 are performed in the same manner as described above. When the hinged fork is attached to the support device 3, the rotational force from the forming device 9 can be transmitted to the attachment side via the clutch 16 to cause the fork 26 to perform a damping operation.

Note that during cargo handling operations using the hinged fork, if there is a risk that the fork 26 will reverse due to the load of the cargo, it is desirable to employ a reversal prevention mechanism such as a worm gear at an arbitrary position in the power transmission system.

The attachment 21 shown in FIG. 6 is a clamp fork, and the attachment 21 has a rotating shaft 24.
is equipped with a right-handed screw 24a on one side and a left-handed screw 24b on the other side with the center as a boundary, and left and right clamp plates 31 as baggage handling members are attached to nut members 27a, 27.
b, and is supported so as to be laterally movable via a guide rod 28, and the other configurations are the same as those of the side shift fork described above. Therefore, in the case of this clamp fork, the rotating shaft 2
4, the left and right clamp plates 30 move in opposite directions to grip or release the load, and other operations including attachment and detachment to and from the support device 3 are performed in exactly the same way as in the case of the side shift fork. .

Next, the attachment 21 shown in FIG. 7 is a side lift, in which a fork par 32 that supports the fork 26 laterally is screwed into the rotating shaft 24 having the same thread 24a over the entire length except for both ends via a nut member 27. and is adapted to be guided in lateral movement via a guide rod 28.

Therefore, in the case of this side lift, when the rotating shaft 24 rotates, the fork 26 and the fork par 32 move sideways to the left and right to carry out a predetermined cargo handling operation, and other functions are performed by the aforementioned side shift fork. Same as in case.

As described above, the cargo handling device of this embodiment uses the rotational force of the rotating shaft 24 to operate the fork 26 and the clamp plate 31, which are cargo handling members of the attachment 21, such as a side shift fork or a hinged fork. The attachment 21 can be attached and detached by making it common by adopting a configuration that allows the same shape, and by having a configuration in which the rotational force of the actuating device 8 provided on the support device 3 side is transmitted to the attachment 21 side via the clutch 16. Moreover, the attachment/detachment is performed by telescopically operating the hydraulic cylinder 6 for detachment provided on the support device 3 side to insert and remove the flanged lock pin 7 into the bottle hole 23 of the attachment body 22. Since this is a system in which attachments are replaced by a driver's seat, as long as the lock pin 7 and the pin hole 23 are accurately aligned, the attachment can be easily replaced on the driver's seat.

Note that the attachment 21 is not necessarily limited to the one shown in the drawings, and in short, any attachment that can provide a predetermined operating mode to the baggage handling member using the rotational force of the rotating shaft 24 is applicable. .

Additionally, although the invention has been described in terms of preferred embodiments, various changes may be made without departing from the spirit of the invention. For example, the hydraulic cylinder 6 may be changed from vertical to horizontal as shown in the figure, the lock bin 7 as an attachment/detachment means may be attached to the attachment body 22 and operated by the hydraulic cylinder 6, or the clutch 16 may be It is possible to change to an electromagnetic clutch type or a fitting type of a socket with a square hole and a square shaft.

In addition, the actuation device M8 and the clutch 1 installed on the support device 3
6, a configuration can be adopted in which they are installed on the left and right side plate portions 4b of the sub-lift bracket 4, respectively. In this case, for example, in the side shift fork or clamp fork of the attachment 21, the rotating shaft 24
By dividing it into two left and right parts, and driving them individually via the left and right actuating devices 8 and clutch 16, it is possible to give the fork 26 and clamp plate 30 a predetermined operating form, and especially to the side shift. In the case of a fork, it can also be used to adjust the distance between the forks 26. In addition, the hydraulic cylinder 6 and actuation device 8 for removal and removal are sub-
It may be directly assembled to the lift bracket 2 without using the lift bracket 4.

(Effects of the Invention) As detailed above, according to the present invention, attachments can be easily replaced without having to perform difficult work such as removing or removing piping or remodeling, which was conventionally necessary when replacing attachments. It is possible. Therefore, as attachment replacement becomes easier, it becomes possible to effectively perform a variety of cargo handling tasks using a single forklift, improving forklift utilization rates and reducing equipment costs. be done.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a perspective view showing a support device constituting a cargo handling device and an attachment attached to it, FIG. 2 is a front view of the support device with the attachment attached, and FIG. Figure 3 is a side view showing the attachment installed state using a hydraulic cylinder for removing and removing the attachment and a flanged lock bin, Figure 4 is a sectional view showing the actuating device and clutch for operating the attachment, Figures 5, 6, and 7. are perspective views showing other attachments, respectively. 1... Mast 2... Lift bracket 3... Support device 6... Hydraulic cylinder 7.
... Lock bottle with flange 8 ... Actuation device 16 ... Clutch 21 ... Attachment 22 ... Attachment body 23 ... Bottle hole 24 ... Rotating shaft 26 ... Fork 31 ... Clamp plate

Claims (1)

[Claims] An elevating member that ascends and descends along the mast, a cylinder for attaching and detaching an attachment attached to the elevating member, an attachment/detachment means that connects or detaches the attachment from the elevating member by the telescoping operation of this cylinder, and an elevating member installed on the elevating member. and a clutch capable of transmitting the rotational force of the actuating device to the attachment side when the attachment is installed, and the attachment is suspended horizontally on the attachment body, and when installed on the elevating member. A cargo handling device for a forklift, comprising: a rotating shaft rotatable via the clutch; and a cargo handling member attached to an attachment body so as to be able to assume a predetermined operating mode by rotation of the rotating shaft.