JPH022651Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a safety device for a towing device in a towed vehicle such as a portable working machine.

[Prior art and its technical issues] As shown in Fig. 11, in a portable work machine such as a four-wheel portable compressor or a four-wheel portable generator, a drawbar 1 is rotated in the vertical direction by a guiding arm 2 on the machine side. It is set up so that it can move freely.
When not towing, the drawbar 1 is raised to a nearly vertical position, and the hook 3 provided on the drawbar 1 is engaged with the catch 4 provided on the guiding arm 2 to rotate the drawbar 1 upward. Holds it so it doesn't fall.

By the way, hook 3 and money receiver 4 are drawbar 1.
Since the engaged state is maintained by the downward rotational moment due to its own weight, for example, the machine will not vibrate or swing when transported by truck, or swing when lifted and moved by a crane. Alternatively, the hook 3 may easily come off due to a slight rotation of the drawbar due to the drawbar coming into contact with another object. If the hook 3 comes off in this way, the drawbar 1 will fall down suddenly and there is a risk of serious injury or death.

[Purpose of the present invention] The purpose of the present invention is to provide a portable working machine, etc. that can prevent the hook from coming off the receiver when the drawbar rotates due to vibration or rocking of the machine. The purpose of this invention is to provide safety equipment for towing devices.

[Summary of the invention] This invention is provided with a stopper body on the locking part side of the receiver, which is rotatable in the vertical direction and can be locked by forming a gap or an engaged state with the receiver. Even if the drawbar rotates due to vibration or swinging, the hook can be prevented from being pulled out from between the money receiver and the stopper body.

[Embodiment of the invention] Figures 1 to 6 show the first embodiment, and Figures 1 to 6 show the first embodiment.
In FIG. 3, reference numeral 11 indicates a four-wheeled portable compressor, and the base end of a drawbar 13 is attached to a boss 12a at the tip of a guiding arm 12 on the side of the main unit 11 in the vertical direction via a support shaft 14. It is pivoted so that it can rotate freely.

15 is the support shaft 14 on the upper surface side of the drawbar 13
The drawbar 13 is attached to a support 17 provided near the support shaft 14 on the upper surface side of the guiding arm 12. It is provided so that it can be engaged in a nearly vertical position. The receiver 17 has an engaging portion 17a having an inclined surface formed on the side opposite to the support shaft 14, and an inclined portion 17b formed on the side of the support shaft 14.

Reference numeral 18 denotes a flat plate-shaped stopper body having a substantially right-angled triangular shape, and its corner side is located opposite to the engaging portion 17a, and is pivotally connected by a bracket 19 and a support shaft 20 so as to be freely rotatable in the vertical direction. ing. The height of the support shaft 20, that is, the length of the rotation radius of the stopper body 18 is 1 short side from the fulcrum of the stopper body 18.
The long side 18b is longer than the length to the end of the long side 8a and shorter than the length to the end of the long side 18b.
In a state where the end portion 18d consisting of the and oblique side 18c engages with the upper surface of the guiding arm 12 and locks the stopper body 18, the short side 18a and the oblique side 18
A gap A smaller than the diameter of the wire of the hook 15 is formed between the end 18e of the hook 18 and the end of the receiver 17.

However, when the drawbar 13 is raised to a nearly vertical position and the hook 15 is attempted to engage with the engaging portion 17a of the receiver 17 as usual, the hook 15 is attached to the short side of the stopper body 18 as shown in FIG. 18a, the stopper body 18 is engaged with the receiver 17 while rotating slightly counterclockwise about the support shaft 20 against the rotational moment due to its own weight, and the hook 1
5 reaches the engaged state, the contact with the short side 18a is released, so the stopper body 18 rotates clockwise and locks, and thereby the receiver 17 and the stopper body 1
A gap A is formed between 8 and 8. Therefore, even if the drawbar 13 rotates due to vibration or rocking applied to the machine 11, the hook 15 is prevented from being removed by the stopper body 18 as shown in FIG. 2, and engagement with the receiver 17 is prevented. be done.

Next, when the drawbar 13 is rotated downward and used, the stopper body 18 is manually rotated slightly counterclockwise about the support shaft 20 to create a gap between the stopper body 18 and the holder 17. By making the size of the hook 15 large enough for the hook 15 to pass through, the hook 15 can be removed as usual. Furthermore, the fifth
As shown in the figure, if the stopper body 18 is manually rotated approximately 270 degrees counterclockwise to lock the long side 18b to the receiver 17 and then the hook 15 is removed, the stopper body 18 will be moved by the hook 15. It is pushed up and automatically rotated clockwise and locked in the state shown in Figure 2. Furthermore, in the event that the stopper body 18 becomes the state shown in FIG. The hook 15 is engaged with the end portion 18d.
engagement is prevented, thereby preventing operational errors.

7 and 8 show a modification of the first embodiment, in which the bracket 19 is provided with a restraining portion 21 that restricts the rotation range of the stopper body 18 in the counterclockwise direction. This restraining portion 21 prevents the stopper body 18 from rotating to the state shown in FIG. In addition, Fig. 8 shows the stopper body 1.
End portion 18 consisting of short side 18a and oblique side 18c of 8
The stopper body 18 is configured to be locked in a state in which the end portion of the receiver 17 is in the engaged state B.

9 and 10 show a second embodiment, and the same parts as in the above embodiment are denoted by the same reference numerals.
22 has a narrow end 22 on one side and a wide end 22 on the other side.
It is a substantially L-shaped stopper body, which is provided with a stopper body, and its corner side is connected to the engaging part 1 of the receiver 17.
7a, and is pivotally connected by a bracket 19 and a support shaft 20 so as to be freely rotatable in the vertical direction. The height of the support shaft 20, that is, the length of the rotation radius of the stopper body 22 is longer than the length from the fulcrum of the stopper body 22 to the end of the narrow end 22a on one side and the end of the wide end 22b on the other side. The width is shorter than the length up to the wide end 2 as shown in Figure 9.
2b is engaged with the upper surface of the guiding arm 12 and the stopper body 22 is engaged, the hook 1 is inserted between the narrow end 22a and the end of the receiver 17.
A gap A smaller than the diameter of the wire rod No. 5 can be formed,
Further, as shown in FIG. 10, the large end portion 22b is engaged with the upper surface of the guiding arm 12 and
2 is locked, a gap A can be formed between the wide end 22b and the end of the receiver 17. When the stopper body 22 is locked as shown in FIG. 9, when an attempt is made to engage the hook 15 with the receiver 17, the stopper body 22 comes into contact with the hook 15 and counterclockwise as in FIG. When the hook 15 is separated from the hook 15, the hook 15 is automatically rotated clockwise and locked into a state where the hook 15 can be prevented from being pulled out. Also, when removing the hook 15, the stopper body 22 may be manually rotated counterclockwise as in FIG. 4, and in the case of FIG. It rotates. Therefore, even if the drawbar 13 rotates in both FIGS. 9 and 10, the hook 15 is prevented from being pulled out by the stopper body 22, and the hook 1
5 is not removed from the receipt 17.

In addition, in each of the above-mentioned embodiments, the stopper body is shown as having a flat plate shape, but it may also be in the shape of a frame, etc.
Further, a bullet for applying a desired rotational force to the stopper body may be provided, and although the stopper body is shown to be locked to the guiding arm, the locking member may be placed on the guiding arm or on the bracket. It may be provided as appropriate.

[Effects of the invention] The present invention is provided with a stopper body that can be freely rotated in the vertical direction on the engaging part side of the receiver and can be locked by forming a gap or an engaged state with the receiver. Even if the drawbar rotates due to vibration, etc., the hook will not come out from between the receiver and the stopper body, so the hook can be prevented from coming off, and the danger of the drawbar falling over and causing a serious accident can be eliminated, which is highly effective.

[Brief explanation of the drawing]

1 to 6 show a first embodiment of the present invention,
Figure 1 is a side view of the portable work machine, Figure 2 is a front view of the traction device, Figure 3 is a plan view of the same, Figures 4 and 5.
Figure 6 is a front view showing the operating state, Figure 7 is a
Figure 8 is a front view showing a modified state of the same embodiment;
FIG. 10 is a front view of the second embodiment, and FIG. 11 is a front view of the conventional device. DESCRIPTION OF SYMBOLS 11... This machine, 13... Drawbar, 15... Hook, 17... Receipt, 18, 22... Stopper, A... Gap part, B... Engaged state part.

Claims (1)

[Scope of utility model registration request] A drawbar is provided on the machine side so as to be freely rotatable in the vertical direction, and the drawbar is held in an upwardly rotating state by engaging a receiver provided on the machine side and a hook provided on the drawbar. The hook is removed from between the receiver and the stopper body by providing a stopper body which can be locked by forming a gap or an engaged state with the receiver on the engagement part side of the metal and is rotatable in the vertical direction. A safety device for a traction device for a portable working machine, etc., which is characterized by being able to prevent.