JP3334764B2 - Conveyor with shock absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved conveyor equipped with a shock absorber provided with a shock absorber for reducing the impact of a conveyed object falling on a slat plate.

[0002]

2. Description of the Related Art Conventional conveyors with shock absorbers include:
For example, there is one shown in FIGS. The figure shows
FIG. 3 shows a conveyed object dropping portion of a slat conveyor 2 that conveys a conveyed object 1 in which cutting waste from a steel plate end is solidified into a cube by a press. A fixed shock absorber 3 is provided at the transported object dropping portion, and absorbs the impact when the transported product 1 is pushed out of the receiving table 5 by the pusher device 4 and falls onto the conveyor slat plate 6. Like that. The fixed type shock absorbing device 3 has a structure in which a shock absorbing member formed by laminating an upper surface plate 7 and a shock absorbing rubber plate 8 is supported by a frame 9 and is fixedly attached to a conveyor frame 10 so that the upper surface of the upper surface plate 7 is always fixed. The slat plate 6 is supported in contact with the lower surface of the conveyor slat plate 6.

The conveyed article 1 is dropped on the conveyor slat plate 6 with the conveyor stopped. The impact at the time of the drop is absorbed by the cushioning rubber plate 8 of the fixed shock absorber 3, and then the conveyor is started to convey the article 1 in the direction of arrow A.

[0004]

However, in such a conventional conveyor with a fixed shock absorber,
The lower surface 6b of the conveyor slat plate 6 at the falling part of the conveyed object
Is transported while sliding on the upper surface 7a of the upper plate 7 of the normally fixed shock absorber 3, so that the lower surface 6 of the conveyor slat plate 6
b and the upper plate 7 of the shock absorber wear out, the life is shortened remarkably, and there is a problem that the conveyor slat plate 6 and the upper plate 7 of the shock absorber must be frequently replaced.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and provides a conveyor with a shock absorber in which the conveyor slat plate and the upper plate of the shock absorber do not need to be replaced and need not be replaced. It is intended to be.

[0006]

SUMMARY OF THE INVENTION The present invention, which achieves the above object, relates to a conveyor equipped with a shock absorber provided with a shock absorber for absorbing the impact of a conveyed object dropped on a conveyor. It is characterized in that it is a shock absorber with an elevating mechanism which rises when an object falls and supports the conveyor, and lowers when transporting and moves away from the conveyor.

[0007]

In the conveyor with a shock absorber according to the present invention, only when the conveyed object falls, the shock absorber is raised by the operation of the elevating mechanism to support the lower surface of the conveyer slat plate, and the conveyed object is added to the conveyor slat plate by dropping. Absorbs shock.
Next, the shock absorber is lowered by the operation of the elevating mechanism, the conveyor is started in a state where the support of the conveyor slat plate is released, and the conveyor slat plate is sent to convey the goods.
Therefore, the conveyor slat plate and the shock absorber are not in contact with each other during transportation, and there is no room for abrasion due to sliding.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show one embodiment of the present invention. FIG. 1 is a plan view of a conveyed object dropping part, FIG. 2 is a side view, and FIG.
FIG. 3 is a view taken along line III-III in FIG. 1. In the drawings, the same or corresponding parts as those in the related art are denoted by the same reference numerals.

Two (or more) conveyor chains 1 arranged in parallel on a conveyor frame 10
During the period 1, a number of conveyor slat plates 6 are suspended independently of one another via an attachment 12 to form a flat conveying surface. The load of the conveyed object 1 placed on the conveyor slat plate 6 is supported by the chain rollers 13 rolling on the conveyor frame 10. Fall on. In order to absorb the impact at the time of the fall and reduce the impact load on the chain roller 13, a buffer device 20 with an elevating mechanism is arranged on the lower surface of the conveyor slat plate 6 on the carrying side.

[0010] The shock absorber 20 with a lifting mechanism of this embodiment
Is constructed such that a cushioning material formed by laminating a cushioning device upper plate 7 and a cushioning rubber plate 8 is mounted on a lifting frame 21 and supported by a lifting mechanism 22 so as to be able to move up and down. The lifting frame 2
Numeral 1 denotes three H-shaped frame members 21a having a length long enough to receive the conveyed object 1 are arranged in parallel in a long direction in the conveying direction and are integrally connected, and the lower surface of each frame member 21a is provided with an interval. The front and rear connecting plates 23A and 23B protrude. The front connection plates 23A are arranged in three rows in parallel in the width direction of the conveyor, and are integrally connected by link pins 24A penetrating transversely. Similarly, the rear connecting plate 23B is integrally connected by link pins 24B.

The elevating mechanism 22 includes the elevating frame 21.
Are configured as a parallel crank mechanism (parallel movement mechanism using a link) using the as a connecting rod. That is, two clevises 25 are provided on the floor FL below the lifting frame 21 at the same front and rear intervals as the front and rear connection plates 23A and 23B.
A and 25B are installed, and link plates 26 are respectively provided.
One ends of A and 26B are rotatably supported via link pins 25a and 25b. Each of those link plates 2
6A and 26B are connected to the lifting frame 2 respectively.
1, the link pins 24A and 23B are attached to the link pins 24A and 23B.
a and 24b are rotatably engaged. This parallel crank mechanism is formed as a pair on the left and right sides with the conveyor 2 interposed therebetween, and can be linked integrally with the left and right via link pins 24a and 24b. In this embodiment, one clevis-type pneumatic cylinder 27 is used as an actuator for the interlocking drive. The cylinder mounting end is rotatably supported on the floor FL via a clevis 28, The rod 29 is obliquely engaged with the link plate 26A via the clevis 30.

Next, the operation will be described. Now, it is assumed that the buffer device 20 with the elevating mechanism is at the retracted position shown by the solid line in FIG. The conveyed article 1 is still placed on the cradle 5, and the conveyor 2 is stopped. First, working air is sent to the actuator 27 of the shock absorber 20 with the lifting mechanism by a command from a control device (not shown), and the cylinder rod 29 moves forward. Thereby, the link plate 2 of the lifting mechanism 22
6A is pressed from the side and pivots upright about the link pin 25a of the clevis 25A. At the same time, the other link plate 26B also rotates in the same upright direction about the link pin 25b of the clevis 25B via the lifting frame 21 which is a connecting rod of the parallel crank mechanism. In conjunction with this, the lifting frame 21 moves upward in parallel, and when the link plates 26A, 26B stand upright, the shock absorber upper plate 7 comes into contact with the lower surface of the conveyor slat plate 6 and stops.

Thus, the shock absorber 20 with the lifting mechanism is
It is in the standby state for receiving the goods indicated by the chain line in FIG. Next, the pusher device 4 operates to push out the conveyed article 1 on the receiving table 5. The extruded article 1 is a slat conveyor 2
Falls on the conveyor slat plate 6. The impact force of the drop is absorbed by the cushioning rubber plate 8 of the shock absorber 20 with the lifting mechanism that supports the lower surface 6b of the conveyor slat plate 6. As a result, an excessive impact load on the chain roller 13 is reduced, and damage to the slat conveyor 2 can be prevented. A timer counter (not shown) operates simultaneously with the activation of the pusher device 4.

When the preset time is counted by the timer counter, the control device determines that the conveyed object 1 has fallen on the slat conveyor 2 and determines whether the conveyed object 1 has fallen on the slat conveyor 2 and moves the lift frame 21 of the shock absorber 20 with the elevating mechanism. Command a descent. By the command, the working air is sent to the opposite side of the actuator 27 of the shock absorber 20 with the lifting mechanism, and the cylinder rod 29 is retracted. Thus, the lifting mechanism 2
2 operates in the opposite direction to the above, the elevating frame 21 starts to descend, and returns to the retracted position.

When the lowering of the lifting frame 21 is completed, a command is immediately issued from the control device to the driving device of the slat conveyor 2, the slat conveyor 2 is started, and the transported object 1 starts to be transported in the direction of arrow A. When the article 1 is carried out, the slat conveyor 2 stops and one cycle ends.

Subsequently, a command is issued again from the control device, and the buffer device 20 with the elevating mechanism rises to be in a standby state for receiving the conveyed goods. Hereinafter, the same operation cycle as described above is repeated. In this cycle, the conveyor slat 2 is not in contact with the shock absorber upper plate 7 of the shock absorber 20 with the lifting mechanism during transport, and the conveyor slat plate 6 is worn due to the conventional sliding contact with the shock absorber upper plate 7 as in the prior art. No problems such as deformation, falling off, etc. occur.

Therefore, it is not necessary to replace the conveyor slat plate 6 and the shock absorber upper plate 7, so that the maintenance management is simple, the cost is reduced, and the productivity is improved. Further, since there is no contact sliding with the conveyor slat plate 6, a soft rubber plate which is optimal as a cushioning material can be used as the cushioning device upper plate 7 instead of a member such as a hard iron plate, thereby providing a high vibration isolation effect. Is also obtained.

In the embodiment described above, the actuator using the pneumatic cylinder 27 as the actuator of the elevating mechanism 22 in the shock absorber 20 with the elevating mechanism has been described. However, the invention is not limited to this. A type actuator may be used. Further, as the elevating mechanism 22 of the shock absorber 20 with the elevating mechanism, a mechanism using a parallel crank mechanism has been described. However, the invention is not limited to this, and other completely different mechanisms, for example, the elevating frame 21 may be directly operated by a plurality of cylinder actuators. Or a mechanism that moves up and down by a combination of an electric motor and gears or cams, etc. In other words, a mechanism that allows the lifting frame to be displaced up and down and retracts the shock absorber during the operation of the conveyor. Good.

Also, the above-described embodiment uses the cushioning rubber plate 8 as the shock absorbing material when the conveyed object 1 drops. However, the present invention is not limited to this, and instead of the rubber plate or in combination with the rubber plate, a leaf spring or the like is used. A buffer member made of an elastic member such as a coil spring may be used, or a shock absorber using fluid pressure may be used. The time after the start of the pusher device 4 is counted and indirectly determined that the conveyed object 1 has fallen on the slat conveyor 2. However, for example, a strain gauge or A force sensor using a piezoelectric element or the like is installed to electrically detect the presence or absence of a load, a mechanical switch such as a micro switch or a limit switch, or various known detections such as an electric type, a magnetic type, and a photoelectric type. The determination may be made by detecting the displacement of the shock absorber at the time of falling using a switch, or by directly detecting the presence or absence of the conveyed object 1 on the slat conveyor 2 using a photoelectric tube or the like.

Further, the shock absorber with the lifting mechanism according to the present invention comprises:
The present invention can be applied to other types of conveyors other than the slat conveyor.

[0021]

As described above, according to the present invention,
The conveyor is equipped with a shock absorber with an elevating mechanism that rises when the conveyed object falls and supports the conveyor, and moves down when conveyed and moves away from the conveyor.When the conveyed object falls, the shock absorber is raised to lower the conveyor slat plate. , And on the other hand, the conveyor slat plate and the shock absorber are not in contact with each other during transportation, so that they do not slide. As a result, it has become possible to provide a conveyor with a shock absorber that does not require wear and deformation of the conveyor slat plate and the upper plate of the shock absorber and that does not require replacement.

Further, since the shock absorbing device does not slide on the conveyor slat plate, a soft rubber plate can be used as the shock absorbing plate of the shock absorbing device, and as a result, an excellent vibration damping property can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a plan view of a main part of a conventional conveyor with a shock absorber.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyed object 2 Slat conveyor 20 Shock absorber with elevating mechanism 22 Elevating mechanism

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noritaka Nakanishi 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Pref. , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65G 21/00-21/22 B65G 15/00-15/28 B65G 15/60-15/64 B65G 39/00-39 / 20 B65G 47/00-47/20 B65G 47/52-47/78

Claims (1)

(57) [Claims] 1. A conveyor with a shock absorber provided with a shock absorber for absorbing the impact of a conveyed object dropped on a conveyor, wherein the shock absorber rises when the conveyed object falls and supports the conveyor, and when conveyed, A conveyor with a shock absorber, wherein the conveyor is a shock absorber with a lifting mechanism that descends and separates from the conveyor.