JP3128527B2 - Load collapse alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION If a truck carrying cargo is suddenly braked and stopped suddenly, there is a danger that the cargo will collapse due to its inertia trying to keep moving forward.

[0002] The present invention relates to a load collapse alarm device which issues a warning when a brake is applied suddenly and the danger of load collapse is approaching.

[0003]

2. Description of the Related Art Cargo loaded on a truck tends to lean in the traveling direction due to inertia when the vehicle stops. Therefore, if the cargo is not tightly tightened, there is a high risk of collapse. This is particularly dangerous when sudden braking is applied during high-speed running.

[0004] However, the driver cannot monitor the condition of the cargo while traveling, and can only inspect the tightening condition of the rope fixing the cargo when the vehicle stops for a break halfway. There is no better way to know the status of the load while traveling than to provide a television surveillance camera.

[0005]

The installation of a television surveillance camera is not only expensive but also because the driver is distracted by the road conditions ahead when braking. It is difficult to clearly monitor cargo movements. Therefore, there is a demand for a means that can be installed at low cost to prevent cargo from collapsing.

[0006]

A load collapse alarm device according to the present invention includes a pendulum that swings by inertia and a magnet that applies an adjustable deterrent to the swing of the pendulum until the load collapse occurs. However, when a large inertia force is applied to the pendulum to a degree close to this, the pendulum starts swinging beyond the deterrent and pushes a switch to issue an alarm.

[0007] The inertial force causing the collapse of the load varies depending on the type of cargo and the loading method. Therefore, the relationship between the status of the cargo and the timing of starting the swinging of the pendulum is tested in advance, and the inertia force is changed according to the type of cargo and the loading method. Adjust the pendulum's rocking deterrent.

[0008]

[Function] When the truck brakes, the pendulum tries to swing due to the inertial force, but as long as there is no danger of collapse of the load, the magnetic force of the magnet acts on the weight of the pendulum and the swing is suppressed. You.

When the inertia force applied to the cargo due to sudden braking increases and approaches a level that causes collapse of the cargo, the inertia force before this causes the pendulum to swing out the deterrent force of the magnet and starts swinging, and the hammer pushes the switch. An electronic alarm is issued.

[0010]

1 to 3 show a first embodiment of the present invention. FIG.
3 is an AA cross-sectional view of FIG. 1, and FIG. 3 is a BB enlarged cross-sectional view of FIG.

The pendulum 1 is configured such that the upper end of a pendulum rod 1 a
As a result, it is pivotally attached to the side wall 3a of the case 3. A screw 4 is formed at the lower end of the pendulum rod 1a and screwed into the weight 5 so that the vertical position of the pendulum rod 1a can be adjusted. Reference numeral 6 denotes a lock nut for fixing the pendulum rod 1a and the weight 5 after adjusting the vertical position of the weight. Immediately below the weight 5, a magnet 7 is mounted and fixed to the lower bottom 3c of the case. This magnet may be a permanent magnet or an electromagnet that draws electricity from the truck. A hammer 8 is attached to an intermediate portion of the pendulum rod 1a, and a micro switch 9 is attached to the front wall 3b of the case so as to face the hammer 8.

To use this alarm device, first, the lock nut 6 is loosened, and the weight 5 is moved up and down along the screw 4 to adjust the gap d between the magnet 7 and the weight 5. When the gap d is increased, the restraining force for suppressing the swing of the pendulum 1 decreases, and when the gap d is reduced, the restraining force increases.

In order to determine the deterrence, the position of the weight at which the pendulum starts to swing before the collapse of the load is determined in advance by experiments, depending on the type of cargo, the manner of loading on the truck, etc., and the cargo is started to be transported. Sometimes, the gap d between the weight and the magnet is set according to the cargo and the way of loading.

When the truck suddenly brakes and the inertial force of the weight 5, the hammer 8 and the like becomes larger than the deterrent by the magnet 7, the pendulum 1 swings and the hammer 8 pushes the microswitch 9 to output an electric signal. . Since the electric signal is transmitted to the driver as a lamp or sound that can be sensed by eyes or ears, the driver stops applying the brake more strongly. Thereby, the inertia force applied to the cargo before the occurrence of the collapse of the load can be reduced to prevent the collapse of the load. This operation can be performed while concentrating attention for driving.

In the above example, the pendulum and the like are installed in the case 3, so that the case 3 can be fixed and used at an appropriate place on the truck, but the pendulum, the magnet, and the switch can be used without using the case. Can be attached directly to an appropriate place in the truck to constitute an alarm device.

[0016]

Since the alarm device has a simple structure and can be manufactured in a small size, it can be attached to various parts of the truck via a case or directly. If a warning is issued from this device, if the brake is immediately released, the inertial force applied to the cargo can be reduced and the collapse of the cargo can be prevented.

Further, some drivers frequently perform sudden acceleration and sudden braking. However, since the driving situation can be known by the way of the load collapse warning, the magnitude of the traveling speed and the change situation are automatically determined. As in the case of a tachograph, the way in which a collapse warning is issued is automatically recorded with respect to the traveling distance or time. Guidance and operation management can be performed. If you combine this alarm with the tachograph,
The operation status can be grasped more effectively.

[Brief description of the drawings]

FIG. 1 is a side view in which a case of a load collapse alarm device of the present invention is cut longitudinally.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pendulum 1a Pendulum rod 2 Horizontal axis 3 Case 3a Side wall 3b Front wall 3c Lower base 4 Screw 5 Weight 6 Lock nut 7 Magnet 8 Hammer 9 Micro switch

Continuation of front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G01P 15/00-15/08 G01P 15/135 H01H 35/14 B60Q 9/00 B60P 7/00-7/18 B62D 33 / 00-33/08

Claims (1)

(57) [Claims] 1. A screw which is screwed into a weight at a lower end of a pendulum rod of a pendulum which is hung on a horizontal axis and oscillates, and is fixed immediately below the weight to provide the weight with an oscillation suppressing force. The gap between the acting magnet and the weight is adjustable, and when the pendulum swings overcoming this deterrent, a switch that contacts the hammer provided in the middle part of the pendulum rod is provided facing the hammer and the load collapse. Alarm device.