JPS644730Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses a simple mechanism to speed up situations such as stopping the progress of the cargo, reducing the speed of progress, or getting stuck in a traffic jam due to some reason during the transportation of cargo using a roller conveyor. This invention relates to an abnormality detection device during cargo transportation that can detect abnormalities and prevent abnormal situations.

When transporting cargo by a roller conveyor, abnormalities such as stopping the progress of the cargo, reducing the speed of progress, or causing congestion of cargo due to foreign objects falling into the transport path, protruding, or getting stuck between the rollers. When an abnormal situation occurs, normally the roller conveyor is stopped or the foreign object is removed from the conveyance path by visually observing the occurrence of the abnormal situation, but in a so-called unmanned state where there are no workers on the work site. If the cargo is below the ground, the occurrence of an abnormal situation may not be noticed at all, making cargo handling extremely difficult or impossible, and there is also the risk of damage to the cargo itself or nearby property due to the cargo falling. In recent years, various detection devices have been installed along cargo transport routes to detect the occurrence of abnormal situations. On the contrary, this may lead to a rise in facility costs and an increase in the failure rate, resulting in an unreasonable economic burden.At the same time, it is necessary to pay attention to ensuring safety during work, etc. The current situation is that many people face conflicts of interest. Therefore, this idea is to set an loose part on a part of the rollers that form the roller conveyor when transporting cargo by a roller conveyor, and to quickly detect abnormal situations using the loose part with a simple detector. The present invention aims to provide an abnormality detection device during cargo transportation that can substantially prevent abnormal situations.

To describe the embodiment of this invention with reference to the drawings below, first of all, in FIGS. 1 and 2 of the first embodiment, a pair of opposing parallel lower frames f ₁ and f ₂ each have a large number of parallel supports. Both ends of shafts d ₁ , d ₂ , d ₃ ... _{d o are} rotatably supported via bearings b ₁ , b ₂ , b ₃ ...bo, and these support shafts d ₁ , d ₂ , d ₃ ... ... one of d _o , for example, except for d ₂ , the outer periphery of the support shaft is covered with a covering body 1 made of an elastic material such as rubber, either directly or through a space, along the longitudinal direction of the spindle. The rollers r ₁ , r ₃ ... r _o are formed, and the spindles d ₁ ,
d ₂ , d ₃ ... chain wheels s ₁ , s ₂ , s ₃ ... near one end of d _o
These chain wheels s ₁ , s ₂ , s ₃ ... _{s o}
While the chain C is tensioned and hung on each of the rollers r _{1 and} r ₂ , _r3 ...
... r _o is rotated in synchronization, so that cargo W can be transported in the direction of arrow a. However, the rollers r ₁ , r ₂ ,
As shown in FIG. 2, for roller r ₂ of r ₃ ...r _o , an elastic material such as rubber is attached to the outer peripheral edge of the bulge e of the holder 2 that is fitted and fixed to the support shaft d _2. The main roller 4 is formed by coating and fixing the cylindrical body 3 made of The body 6 is fixed to the cylindrical body 3 with a gap _i1 , and
Two or four pieces are placed at appropriate locations on the chain wheel _s2 side of the cylindrical body 5.
The detection roller _Q1 is formed by attaching bolt-like fastening pieces J1 at equal intervals below, and fixing an annular piece ₇ slightly inside the end of the cylindrical body 5 (the right end in this case). There is. A restraining piece 8 fixed to the outer peripheral edge of the support shaft _d2 is loosely engaged with the inner peripheral edge of the annular piece 7, and the support shaft
Nut k screwed onto threaded part 9 carved in a part of d ₂
a coil spring 1 stretched between and the stopper piece 8;
0, the stopper piece 8 is always urged and biased toward the annular piece 7, and a detector such as a proximity switch or a magnetic switch is installed on the outside of the stopper piece _j1 .
P ₁ is set, and when the detection roller Q ₁ stops or drops below normal rotational speed, the condition is immediately sensed and the abnormal condition is detected, for example, by a change in the pulse signal, and the pilot lamp blinks and the buzzer sounds. In addition to notifying abnormalities at the work site, it is also possible to stop the driving of rollers r ₁ , r ₂ , r ₃ , etc.

In FIG. 3 of the second embodiment, a main roller 24 is formed by fixing a cylindrical body 23 made of an elastic material such as rubber to the outer peripheral edge of an annular piece ₂₂ that is fitted and fixed in the middle of a support shaft d 21. In addition, an annular piece 26 is fitted and fixed to the stopper piece 25 on one side (right side in this case) of the annular body 22 of the support shaft d ₂₁ and is loosely fitted to the stopper piece 25.
The cylindrical body 27 is fixed to the cylindrical body 23 with a gap i ₂ at the outer peripheral edge thereof to form the detection roller Q ₂ , and at one side of the chain wheel s ₂₁ (the left side in this case), the support shaft d ₂₁ The first point is that the cylindrical covering body 28 is fitted to the
Although this embodiment is different from the embodiment, since other points are the same, the explanation thereof will be omitted.

Furthermore, in FIG. 4 of the third implementation row, a cylindrical body 35 made of an elastic material such as rubber is fixed to the outer periphery of the annular piece ₃₃ and the sealing piece 34, which are welded and arranged in parallel to the support shaft d32. While forming the roller 36, the inner peripheral edge of the lid 38, in which a magnet m made of ferrite is embedded and fixed in a sliding ring 37 that contacts the sealing piece ₃₄ and fits on the support shaft d32, is attached to the support shaft _d32 . One end (here, the left end) of the cylindrical body 39 is fixed to the outer peripheral edge of the bulge t of the lid 38 along the longitudinal direction of the support shaft d ₃₂ , and the other end of the cylindrical body 39 is (Here, the right end) A support shaft d ₃₂ is loosely connected to and penetrates the inner peripheral edge of the lid 40 to be welded to the inside to form the detection roller Q ₃ and a distance is maintained between the lid 40 and the chain wheel s ₃₂ . The second embodiment differs from the first embodiment in that the piece 41 is fitted onto the support shaft _d32 , but the other points are the same, so a description thereof will be omitted. In the figure, b ₂₁ and b ₂₂ are bearings, i ₂ and i ₃ are gaps, j ₂ ,
j ₃ is a fastening piece, P ₂ and P ₃ are detectors, S ₂₁ and S ₃₂ are chain wheels,
42 and 43 are covering bodies made of rubber material.

Since this device has the above-mentioned configuration, in the first embodiment, when the cargo W is transported with the upper surfaces of the main roller 4 and the detection roller Q ₁ directed in the direction of the arrow a, there is no particular problem during the transport. In some cases, the main roller 4 and the detection roller _Q1 rotate at the same rotational speed and no abnormality is observed in the detector _P1 , but a foreign object may fall onto the roller in the direction of arrow a or a foreign object may fall onto the roller from below. When the cargo W cannot move in the direction of the arrow a or its traveling speed decreases due to protrusion or cargo congestion, the main roller 4 rotates without slipping between the main roller 4 and the cargo W, but the detection roller Q ₁ stops rotating, or
Alternatively, although the main roller 4 rotates along the outer periphery of the bulge e, the rotation speed decreases, so the detector
P ₁ senses this situation and, for example, detects and notifies the abnormal situation by blinking the pilot lamp or sounding the buzzer due to a change in the pulse signal, and also stops the chain C via relays, connecting rods, etc. The driving of s ₁ , s _{2 ,} etc. is stopped, and the operation of rollers r ₁ , r _{2 ,} etc. is stopped. In this way, the occurrence of an abnormal situation during the transportation of cargo W can be quickly sensed and detected, and
By stopping the drive of the roller conveyor, it is possible to prevent accidents caused by abnormal situations, and the main roller and detection roller are placed on the same support shaft with a small gap between them.
This detection roller Q ₁ is rotatably supported through i ₁
Since the fastening piece J ₁ attached to the side faces the detector P ₁ , the structure of the entire mechanism is extremely simple, so it can be manufactured robustly and inexpensively, and there is no risk of failure, and it can be used at all times. Not only can it detect and detect the occurrence of abnormal situations during cargo transportation to ensure safety during work, but it is also economical for users as it avoids rising facility costs, and it is also easy to inspect, clean, and repair. It has practical benefits such as being able to easily carry out such operations and being convenient in terms of maintenance and management.

In the second embodiment and the third embodiment, the first
As in the embodiment, when a foreign object falls or protrudes into the transport route during cargo transport, or there is a traffic jam, the main rollers 24 and 36 rotate while slipping between them and the cargo W, but the detection roller Q ₂ ,
The detectors P ₂ and P ₃ detect when the rotation of Q ₃ stops or the rotation speed decreases, and an abnormal situation can be detected by a change in the pulse signal.

[Brief explanation of the drawing]

The drawings are examples of this invention, and Fig. 1 is a partially cutaway sectional view of the main part of a roller conveyor in which the proposed product is assembled, Fig. 2 is an enlarged sectional view taken along the - line in Fig. 1,
FIG. 3 is a sectional view of another embodiment different from FIG. 2,
FIG. 4 is a sectional view of still another embodiment. d ₂ , d ₂₁ , d ₃₂ ... Support shaft, i ₁ , i ₂ , i ₃ ... Gap, j ₁ ,
j ₂ , j ₃ ...Fixing piece, P ₁ , P ₂ , P ₃ ...Detector, Q ₁ ,
Q ₂ , Q ₃ ...detection roller, W ...cargo, 4,24,
36...Main roller.

Claims (1)

[Claims for Utility Model Registration] (1) A detection roller that faces a main roller fixed to a rotating support shaft with a small gap, is loosely engaged with the support shaft, and is installed at an appropriate position on the detection roller. An abnormality detection device during cargo transportation, in which a fastening piece faces a detector set at a predetermined location. (2) A plurality of fastening pieces are attached in the form of bolts at equal intervals near the end of the detection roller on the side opposite to the main roller.Claim 1 of the Utility Model Registration Claim
Abnormality detection device during cargo transportation as described in Section 1.