JPH08108931A - Stopper device - Google Patents

Abstract

PURPOSE: To provide a stopper device equipped with a stopper which recedingly enters under the conveying surface of a conveyor without damaging surfaces of an article, having made a hitting contact with the stopper, standing still on the conveyor. CONSTITUTION: The axial direction of an elevating rod 19 capable of rising from or falling to a stopper lifting device 18 being inclined a little against the vertical direction, a stopper 22 recedingly enters being inclined toward the front side (the conveying direction) against the vertical direction. Proceeding/ receding movement of a stopper-lifting frame 21 attached to the upper end part of the elevating rod 19 is guided and regulated by guide rods 20 installed on the left and on the right, one rod each, of the elevating rod 19. A cushioning pad 22a for absorbing a shock at the time of a collision with an article W is provided on the back side of the upper part of the stopper 22 which projects above the conveying surface of a roller conveyor and makes a hitting contact with the article W.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper device provided with a stopper which can be projected and retracted with respect to a conveyor surface.

[0002]

2. Description of the Related Art On a conveyor such as a roller conveyor or a chain conveyor, a stopper device having a stopper capable of projecting and retracting relative to a conveyor surface is used as a means for stopping conveyed articles. There is. The articles are stopped by hitting a stopper that projects above the conveyor transport surface. Then, after the protruding stopper retreats below the conveying surface of the conveyor, the stopped article is conveyed again.

[0003]

However, since the above-mentioned protrusion / retraction of the stopper is performed by advancing and retreating in a direction perpendicular to the ground (vertical direction), when the stopper retracts, the stopper is an article. The surface of the abutting article may be damaged by rubbing the surface.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a stopper that retreats below the conveying surface of a conveyor without abutting the stopper on the conveyor and damaging the surface of the stopped article. It is to provide a stopper device provided.

[0005]

In order to achieve the above object, the present invention is a stopper device provided with a stopper which can be projected / retracted with respect to a conveying surface of a conveyor, wherein the stopper is provided in a vertical direction. On the other hand, it is characterized in that it inclines in a direction away from the convey direction of the conveyor and retreats. For example, the stopper can be moved forward and backward by a linear movement so that the stopper can project and retract with respect to the conveying surface of the conveyor, and an advancing and retracting mechanism for advancing and retracting the stopper is installed to be inclined with respect to the vertical direction. Also, guides the movement of the stopper.
A regulating guide member may be provided.

[0006]

Since the stopper retreats while being inclined with respect to the vertical direction in the direction of escape in the conveying direction of the conveyor, the stopper separates from the article surface immediately after the start of retreat. Further, since the advancing / retreating mechanism for linearly moving the stopper forward / backward is installed so as to be inclined with respect to the vertical direction, the stopper reclines linearly while being inclined with respect to the vertical direction in the direction in which the conveyor conveys. . Further, since the guide member guides and regulates, the advancing / retreating direction of the stopper is stable.

[0007]

EXAMPLES Examples of the present invention will be described below with reference to the drawings, but the present invention is not limited to these examples without departing from the gist of the present invention. 1 is a simplified plan view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional view taken along line II-II of FIG. 1, and FIG.
3 is an enlarged cross-sectional view taken along line III-III of FIG. 1, and FIG. 4 is an enlarged view of a main part of FIG. In this specification, the front means the right side in FIG. 1, the rear means the left side in the figure, the right means the lower side in FIG. 1, the left means the upper side in the figure, and the upper side means the front side in FIG. Is the back side of the drawing.

As shown in FIG. 1, each of a pair of left and right roller conveyors 1 with the conveying direction facing forward and backward has a base frame 2 and a longitudinal direction in which the axial center of the base frame 2 is oriented in the left and right direction. It has a large number of rollers 3 rotatably provided at predetermined intervals. A roller shaft 4 on which the roller 3 is rotatably fitted is passed to left and right bearings 5 provided on the base frame 2. Below the base frame 2, columns 23 are provided at predetermined intervals in the front-rear direction.

The roller 3 of the roller conveyor 1 is made up of two rollers, and the roller 3 is positioned below the pair of rollers 3 so that the shaft center can be vertically swung in the horizontal direction. The transmission roller 6 is rotatably provided. The transmission roller 6 has its axis centered between the axes of the front and rear rollers 3 and can transmit rotation to the front and rear pair of rollers 3 by contacting the front and rear pair of rollers 3. . On the other hand, by separating the transmission roller 6 from the roller 3, it is possible to prevent the rotation from being transmitted to the roller 3. The vertical swing of the transmission roller 6 is performed by a known actuating device using a linear solenoid or the like.

A bearing 8 provided on the connecting bar 7 of the base frame 2.
A drive rotary shaft 9 that is always rotatable is rotatably fitted with its axis centered in the front-rear direction. The drive rotation shaft 9 has its axis perpendicular to the axis of the roller 3 (including substantially orthogonal) when seen in a plan view. The drive rotary shaft 9 is rotatable by a motor (not shown) in either forward or reverse directions. The drive rotating shaft 9 is fitted with a wheel 10 corresponding to a wheel (not shown) fixed to the transmission roller 6, and a rotation of the drive rotating shaft 9 is caused by a round belt 11 stretched between these wheels. Is transmitted to the transmission roller 6.

An elevating frame 14 is movably provided at a station 12 for laterally moving (moving left and right) the article W in the middle of the roller conveyor 1 by a known elevating device 13 including a fluid pressure cylinder and the like. . The elevating frame 14
The pair of front and rear chain guides 15 that are long in the left and right are positioned between the rollers 3 that are not in a pair (do not collide with or interfere with the transmission roller), and do not collide with or interfere with the drive rotation shaft 9. It is done like this. The portion of the base frame 2 across which the chain guide 15 crosses is the chain guide 15
Has been removed to escape. Further, of the five rollers 3 between the chain guides 15, the front two and the rear two are a set corresponding to the transmission roller 6, and the central one is interlocked with either one of the front and rear sets. It is power-coupled by an endless chain.

An endless conveyor belt 16 composed of a chain belt or the like is stretched over wheels (not shown) at the left and right ends of the pair of front and rear chain guides 15. The upper portion 16a of the endless transport belt 16 serves as a transport unit, which is raised by the elevating device 13 and protrudes from the transport surface of the roller conveyor 1. Then, in this state, the endless transport belt 16 can be driven to laterally move the article W from the right roller conveyor 1 to the left roller conveyor 1. The drive of the endless transport belt 16 is received from the drive rotary shaft 9 by a known interlocking mechanism.

Stoppers 17 for stopping the articles W are provided in front of and behind the station 12 of the right roller conveyor 1. Stopper device 17
Is a stopper lifting device 18 including a fluid pressure cylinder,
The lift rod 19, the guide rod 20, the stopper lift frame 21, and the stopper 22 are provided. The stopper lifting / lowering device 18 is fixed to a mounting plate 24 that is stretched between a pair of left and right opposing columns 23, and a lifting / lowering rod 19 is installed at the center of the upper surface of the stopper lifting / lowering device 18 so as to move back and forth. A stopper elevating frame 21 is attached to the upper end portion. In addition, the stopper elevating device 1 is so arranged that the lower end of the elevating rod 19 is slightly inclined toward the front side with respect to the vertical direction.
8 is installed at a slight inclination to the ground. A guide rod 20 is provided on the upper surface of the stopper elevating / lowering device 18 so that the shaft center of the elevating rod 19 is parallel to the shaft center of the elevating rod 19, and the guide rod 20 guides the advancing / retreating direction of the stopper elevating frame 21.・ Regulated.

The stopper 22 is a plate having a thickness smaller than the gap between the rollers 3 in the front-rear direction, and is fixed to the stopper elevating frame 21 at the lower portion with bolts, nuts or the like.
The width of the upper portion of the stopper 22 that protrudes onto the transport surface of the roller conveyor 1 when it rises is larger than the lower portion fixed to the stopper elevating frame 21 in the left-right direction.
A cushioning pad 22a, which is formed of a belt-shaped elastic body or the like and absorbs an impact when the article W collides with the article W, is attached. As described above, the vertical direction of the stopper 22 is inclined with respect to the vertical direction, but the rear side surface of the stopper 22 is always kept perpendicular to the ground.

Next, the operation of the stopper device 17 will be described. First, the upper part of the stopper 22 is the roller conveyor 1
The article W conveyed on the conveyor collides with the cushioning pad 22a by being projected on the conveyance surface of, and is stopped in a state of contacting the cushioning pad 22a (see FIG. 4). At this time, since the surface of the cushioning pad 22a is a surface perpendicular to the ground, all of the portion of the cushioning pad 22a above the conveyor conveyance surface is in contact with the article W. Next, the article W
When the sheet is re-conveyed, the stopper 22 is retracted below the conveying surface of the roller conveyor 1. At this time, since the forward / backward direction of the elevating rod 19 is inclined with respect to the vertical direction, the stopper 22
Is inclined in the direction toward the front (conveyance direction) with respect to the vertical direction and retreats. Therefore, the cushioning pad 22a will be separated from the article W immediately after starting the descent, and the article W will be removed.
There is no possibility of damaging the surface of the article by lowering it in contact with. Further, since the guide rod 20 guides and regulates the ascending / descending direction of the stopper elevating / lowering frame 21, the advancing / retracting direction of the elevating / lowering rod 21 is stable, and the stopper elevating / lowering frame 21 and the stopper 22 can be prevented from shaking.

When the stopper device 17 is operated, that is, when the stopper 22 projects and retracts with respect to the conveying surface of the roller conveyor 1, the stopper elevating frame 21, the stopper 22 and the like are used by other members (the roller 3 and the roller 3). It goes without saying that the transmission roller 6 and the like) are configured so as not to collide with or interfere with each other.
Further, although the present embodiment describes the roller conveyor,
The stopper device of the present invention can be applied to other conveyors (chain conveyor, etc.).

[0017]

As described above, the present invention has the following effects. According to the first aspect of the invention, since the stopper is inclined and retracts in a direction away from the vertical direction in the convey direction of the conveyor, the stopper retracts while being separated from the article surface. Therefore, it is possible to prevent the article surface from being damaged when the stopper descends while contacting the article surface. In particular, it is effective in the case of an article whose surface is made of a relatively weak material such as vinyl or cardboard.

According to the second aspect of the present invention, the advancing / retreating mechanism is simply installed by inclining with respect to the vertical direction, and the linear structure is inclined with respect to the vertical direction of the stopper in the escape direction in the conveying direction of the conveyor. Can be realized.

According to the third aspect of the present invention, since the guide member reliably guides and regulates the forward / backward direction of the stopper, the forward / backward direction of the stopper is stable and damage to the article surface can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a simplified plan view showing an embodiment of the present invention.

2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged view of a main part of FIG.

[Explanation of symbols]

 1 Roller Conveyor 3 Roller 17 Stopper Device 18 Stopper Lifting Device 19 Lifting Rod 20 Guide Rod 21 Stopper Lifting Frame 22 Stopper 22a Buffer Pad

Claims (3)

[Claims] 1. A stopper device having a stopper that can project and retract with respect to a conveyor conveying surface, wherein the stopper is inclined and retracted in a direction in which it escapes in a conveyor conveying direction with respect to a vertical direction. Stopper device. 2. The stopper is capable of projecting and retracting with respect to the conveyor surface of the conveyor by linearly moving forward and backward, and an advancing and retracting mechanism for advancing and retracting the stopper is installed at an angle with respect to the vertical direction. The stopper device according to claim 1. 3. The stopper device according to claim 1, further comprising a guide member for guiding / regulating the forward / backward movement of the stopper.