JPH0361298A - Attachment for forklift - Google Patents

Abstract

PURPOSE:To confirm insertion of a sheet pallet into a gripper and grip motion, further, existence of the sheet pallet tilting by providing insertion detectors and grip detectors on both ends in lateral direction of a gripper consisting of a lower plate and an upper plate. CONSTITUTION:A sheet pallet 22 is interposed in a gripper 12 consisting of a lower plate 14 and an upper plate 16, and the sheet pallet 22 is made movable in horizontal direction by an operation of the gripper 12. Insertion detectors 18 detecting that the sheet pallet 22 is inserted to a fixed position inside the gripper 12 and grip detectors 20 detecting that the sheet pallet 22 is interposed by the gripper 12 are respectively attached on both ends in lateral direction of the gripper 12, on an attachment 10. According to this constitution, an operator performs a closing operation of the gripper 12 after confirming the insertion with the insertion detectors 18, and proceeds to the next operation after confirming this grip action is completed with the grip detectors 20.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an attachment for a forklift.

(B) Conventional Technology One type of forklift attachment is one in which one end of a sheet pallet is held between grippers and the sheet pallet is moved horizontally by moving the gripper horizontally. This ripper is composed of a lower plate and an upper plate, between which a sheet pallet can be sandwiched. Furthermore, the gripper is movable in the horizontal direction by a telescoping mechanism. When grasping a sheet pallet, the gripper is moved forward in an open state, and the sheet pallet is inserted between the lower plate and the upper plate. When the driver confirms that the sheet pallet has been inserted to a predetermined position, the driver grips the sheet pallet using the gripper.

The gripper is then moved horizontally. The driver visually confirms that the sheet pallet has been inserted and gripped.

(c) Problems to be Solved by the Invention However, if the sheet pallet insertion and clipping are visually judged as described above, there is a problem in that work errors may occur. In other words, the driver visually checks the gripper from a considerable distance away and through gaps such as the telescoping mechanism. It is determined that the
There is a possibility that the gripper may be moved, and in such a case, the load may fall off during transportation. The present invention aims to solve these problems.

(d) Means for Solving the Problems The present invention solves the above problems by providing the gripper with an insertion detector and a grip detector.

That is, the forklift attachment according to the present invention includes an insertion detector (1) that detects that the sheet pallet (22) has been inserted to a predetermined position within the gripper (12).
8), and a grip detector (20) for detecting that the sheet pallet is pinched by the gripper. Note that the symbols in parentheses indicate corresponding members in the embodiments described later.

(e) Operation When the sheet pallet is inserted into the gripper to a predetermined position, this is detected by the insertion detector. Next, the driver closes the gripper, and the sheet pallet is gripped by the gripper. Completion of this gripping motion is also detected by the grip detector. Therefore, the operator can perform the next operation after confirming that the sheet pallet has been completely inserted and gripped.

(F) Embodiment FIG. 2 shows the entire load push-pull type attachment 10 for a forklift truck. Attachment 10
A gripper 12 is provided at the front lower part of. The gripper 12 is attached to a lower plate 14 as shown enlarged in FIG.
and an upper plate 16 that is movable up and down relative to this. Insertion detection microswitches 18 are installed at both lateral ends of the lower plate 14.
and a grip detection microswitch 20.

Cargo handling operations are performed as follows. First, as shown in FIG. 3, with the lower plate 14 and the upper plate 16 opened, the sheet pallet 22 is positioned between them, and the attachment 10 is advanced. Thereby, the sheet pallet 22 is inserted between the lower plate 14 and the upper plate 16, and when it reaches a predetermined position, the insertion detection micro switch 18 is turned on.

When the insertion detection microswitch 18 is turned on, for example, a lamp in the driver's seat lights up, and when the driver confirms this, the upper plate 16 is moved to the lower plate 1.
They are lowered in four directions and the sheet pallet 22 is sandwiched between them. As a result, the seat pallet 22 acts on the grip detection microswitch 20 as shown in FIG. 4, and the grip detection microswitch 20 is turned on.

When it is confirmed by, for example, a lamp that the grip detection microswitch 20 has been turned on, the driver operates the extension mechanism of the attachment 10 to move the gripper 12 in the horizontal direction. As a result, the sheet pallet 22
can be moved horizontally. Since the insertion and grip of the sheet pallet 22 are confirmed by the insertion detection microswitch 18 and the grip detection microswitch 20, the sheet pallet 22 can be reliably clamped and moved. Furthermore, as described above, the insertion detection microswitch 18 and the grip detection microswitch 20 are provided at both ends of the lower plate 14 in the lateral direction, so that the sheet pallet 22 may be tilted and pushed in only on one side. Conditions can also be detected.

(1.) As described in detail, according to the present invention, since the gripper is provided with an insertion detector and a grip detector,
It can be confirmed that the insertion operation of the sheet pallet into the gripper and the gripping operation have been performed reliably. Further, by providing an insertion detector and a grip detector at both ends of the gripper in the lateral direction, it is also possible to check the inclination of the sheet pallet.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an embodiment of the present invention, Figure 2 is a diagram showing the entire attachment, Figure 3 is a diagram showing the operating state of the insertion detection microswitch, and Figure 4 is a diagram of the grip detection microswitch. It is a figure which shows an operating state. 10... Attachment, 12... Gripper, 14
...Lower plate, 16...Upper plate,
18...Micro switch for insertion detection (insertion detector)
, 20...Grip detection micro switch (grip detector) 22...Sheet pallet.

Claims (1)

[Claims] 1. A forklift attachment that moves the sheet pallet in the horizontal direction by sandwiching the sheet pallet between grippers consisting of a lower plate and an upper plate and moving the gripper in the horizontal direction, A forklift attachment characterized in that it has an insertion detector that detects that a sheet pallet has been inserted to a predetermined position within a gripper, and a grip detector that detects that a sheet pallet is pinched by a gripper. 2. The forklift attachment according to claim 1, wherein the insertion detector and the grip detector are respectively provided at both lateral ends of the gripper.