JPH07315542A - Grain carrying and elevating machine - Google Patents

Abstract

PURPOSE:To preliminarily prevent occurrence of damages of each member by absorbing and releasing the impact load caused when a gear motor is started by the turning action of the gear motor itself and the energized elasticity of elastic materials, and rapidly stop the operation of the grain carrying work when the gear motor is rotated over a specific allowable range of rotation. CONSTITUTION:A horizontal driving pulley shaft 3 is turnably and pivotably stretched over a top part of an elevating machine body 1. A hollow shaft of a gear motor 8 provided with a motor base 10 is fitted and connected to the end part side of the horizontal driving pulley shaft 3, the gear motor 8 is suspended by the horizontal driving pulley shaft 3 in a hanging manner to allow the free turning by the impact load when the gear motor 8 is started, and both sides of the lower part of the motor base are connected to the elevating machine body 1 through the elastic materials 11, 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain conveying elevator which can smoothly convey grains while absorbing and mitigating an impact load generated when a gear motor is started up by a rotating action of the gear motor itself.

[0002]

2. Description of the Related Art Conventionally, a motor base is fixedly mounted on the upper side of an elevator main body, and a motor for rotating a belt with a large number of buckets mounted on the motor base in one direction is used under a non-rotating state. Elevators that are fixed to smoothly carry the work of carrying a conveyed object are known and described in, for example, Japanese Utility Model Publication No. 45-27377 and Japanese Utility Model Publication No. 46-5870 before the present application.

[0003]

By the way, in the conventional elevator of this kind, the motor for rotating the belt is fixedly installed on the motor base 2 which is fixedly installed. If you try to rotate the belt with many buckets to one side by transmitting the rotational power to the transmission belt or chain, the starting force of the motor is directly applied to the transmission belt or chain at one time. Not only can the transfer belt, chain, etc. be stretched due to the impact load, and a predetermined amount of goods cannot be conveyed accurately, but also the transmission belt, chain, belt, bucket, etc. can be damaged by the impact load when the motor is started. Of course, a phenomenon occurs in which the motor itself becomes overloaded and fails.

Further, this phenomenon occurs in a relatively large amount as the amount of transportation increases and becomes large, and there is a problem that efficient transportation work cannot be continued for a long time.

According to the present invention, the impact load generated at the time of starting the gear motor is absorbed and relaxed by the rotating operation of the gear motor itself and the urging elastic force of the ammunition to prevent the damage of each member from occurring at the same time. An object of the present invention is to provide a grain transfer elevator that is configured to promptly stop the operation of the grain transfer operation when rotated beyond a predetermined allowable rotation range.

[0006]

In order to achieve the above object, in the grain conveying elevator of the present invention, the first item is that the end portion of a horizontal drive pulley shaft rotatably mounted on the head of the elevator body. A hollow shaft of a gear motor having a motor base is fitted and connected to the side, and the gear motor is hung in a suspended manner on a horizontal drive pulley shaft so that the gear motor can be freely rotated by an impact load at the time of starting. The lower sides of the motor base and the elevator body are connected via an ammunition.

According to the second aspect of the present invention, the motor base is provided with a limit switch for operating and stopping the gear motor, and the limit switch rotates the gear motor beyond a predetermined allowable rotation range. At that time, the closed state is changed to the open state and the operation of the gear motor is stopped.

[0008]

When the grain transfer operation is started, the gear motor suspended in the air from the end of the horizontal drive pulley shaft is started.

Then, the horizontal drive pulley shaft tends to rotate in the arrow direction by the driving force of the gear motor suspended under the free state.

However, since a conveyor belt having a large number of buckets is suspended between the upper pulley and the lower pulley directly connected to the horizontal drive pulley shaft, a large impact load is applied when the gear motor is started. The gear motor that was suspended in the air without being fixed because it was given to the conveyor belt at once is rotated by the reaction of the impact load in the direction opposite to the direction of rotation of the horizontal drive pulley shaft. The generated impact load is absorbed and relaxed by the rotation of the gear motor itself.

Further, in the gear motor rotated by the impact load in the direction opposite to the horizontal drive pulley shaft, the lower both sides of the motor base on which the gear motor is mounted are connected to the elevator body via the ammunition machine. The gear motor, which is trying to rotate more than necessary due to the reaction due to the impact load, is received by the pulling elastic force or the compressive elastic force of a pair of ammunition, and the rotation range is regulated. Rotate smoothly to convey grain efficiently.

Further, as shown in FIG. 5, when a limit switch for operating and stopping the gear motor is provided on the upper part of the motor base, a shock load at the time of starting the gear motor or a grain clogging phenomenon during conveyance work is caused. When the gear motor is rotated clockwise or counterclockwise beyond the predetermined set rotation range due to overload, etc., the limit switch is opened from the closed state to stop the operation of the gear motor immediately, or Alternatively, the gear motor is stopped with a slight time lag to prevent the gear motor from being damaged.

[0013]

EXAMPLES Examples will be described with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes an elevator main body which can convey grains from the lower part to the upper part and then discharge them from a carry-out gutter 2 to an appropriate place.
A horizontal drive pulley shaft 3 to which an upper pulley 4 is directly connected is rotatably mounted on the head side inside the elevator main body 1, and a lower pulley 5 is rotatably mounted on the lower side. An endless conveyor belt 6 having a large number of buckets 7 mounted on the surface of the pulley 4 and the lower pulley 5 at substantially equal intervals is suspended, and the grain supplied by the conveyor belt 6 rotating in the arrow direction. Is configured to be conveyed from the lower side toward the upper side.

A hollow shaft 9 of a gear motor 8 is fitted and connected to the end of the horizontal drive pulley shaft 3 extending outside the elevator body 1 so that the gear motor 8 can be suspended in a suspended manner. On the back side of 8, a motor base 10 having a gear motor 8 mounted thereon is provided in the vertical direction. Therefore, the motor base 10 is configured to be rotatable with the gear motor 8 in the clockwise or counterclockwise direction about the horizontal drive pulley shaft 3 without being fixed.

Reference numerals 11 and 11 'denote locking members 12 and 1 which are provided on both sides of the lower portion of the motor base 10 and at appropriate positions on the elevator body 1.
2'is a spring type ammunition for connecting with one another. When the gear motor 8 is rotated counterclockwise in FIG. 2, one ammunition is used for the ammunition 11, 11 '. The machine 11 is a towed bullet, and the other bullet 11 'is a compression bullet, which restricts the rotation of the gear motor 8 beyond a predetermined allowable range. On the contrary, when the gear motor 8 rotates clockwise in FIG. 2, one bullet 11 becomes a compression bullet and the other bullet 11 'becomes a towed bullet. is there.

In the embodiment shown in FIG. 5,
A limit switch 13 for operating and stopping the gear motor 8 is provided on the upper part of the motor base 10. The operating rod 14 of the limit switch 13 has a contact plate 15 having an allowable rotation length of the gear motor 8. While the gear motor 8 is in contact with, the gear motor 8 can be energized to continue the conveying work, and when the gear motor 8 is largely rotated in the left-right direction so that the operating rod 14 is disengaged from the contact plate 15, The gear motor 8 is de-energized to immediately stop the carrying work.

Since there is a possibility that the limit switch 13 in the closed state will be opened due to an impact at the time of starting the gear motor 8, the gear motor drive control circuit 16 shown in FIG. The switch 13 is ignored so that the gear motor 8 can be operated for several seconds.

The gear motor drive control circuit 16 operates as follows. That is, in FIG. 6, the start button S
When T is turned ON, the stop button STP is in the ON state,
The relay X is activated (excited), and at the same time, the timer TIM is activated.

When the relay X operates, the contact X of the relay X
-1 is turned on, and the start button ST is held by itself. Further, the contact X-2 of the relay X is turned on, and the contact TI of the timer TIM is
Since M is also ON, the gear motor M is activated. At this time, even if the limit switch 14 is turned off due to an impact load or the like, the contact TIM of the timer TIM continues to be turned on during the time (several seconds) specified by the timer, so that the gear motor M is started. It

After starting the gear motor M, the timer T
After the lapse of the specified time of IM, when the limit switch is turned off due to falling into an overload state, the gear motor M is stopped.

After starting, the stop button S
When TP is pressed, the relay X is released (demagnetized), so the relay contact X-2 is turned off and the gear motor M is stopped.

[0023]

Since the present invention is constructed as described above, it has the following effects.

According to the first aspect of the present invention, the impact load generated at the time of starting the gear motor is absorbed and alleviated by the mere rotation of the gear motor suspended in a suspended manner at the end of the horizontal drive pulley shaft, and the conveyor belt is conveyed. In addition to preventing damage to the bucket and gear motor before they occur, it is possible to reliably carry out efficient grain transfer work for a long period of time, and to reduce the number of parts as much as possible to provide an inexpensive product. Since the motor base equipped with a gear motor was connected to the elevator body via an ammunition machine, not only the rotation range of the gear motor can be easily regulated, but also vertical movement adjustment of the horizontal drive pulley shaft can be easily performed, The tension of the conveyor belt can be adjusted.

According to the invention described in claim 2, the gear motor is directed in the left-right direction beyond the allowable rotation range due to an impact load generated at the start of the gear motor or an overload due to a grain clogging phenomenon during the conveying work. When rotated, the limit switch is actuated to immediately stop the operation of the gear motor, so that the grain transfer work can be safely accomplished.

[Brief description of drawings]

1 is a cutaway view of a grain transport elevator according to the present invention,
It is a front view in which a main part is broken.

FIG. 2 is an enlarged front view of a main part in which a part of the grain conveying elevator according to the present invention is cut away.

FIG. 3 is a side view of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is a partially cutaway front view of a grain conveying elevator having a motor base provided with a limit switch.

FIG. 6 is a drive control circuit diagram of a gear motor.

[Explanation of symbols]

 1 Elevator main body 3 Horizontal drive pulley shaft 8 Gear motor 9 Hollow shaft of gear motor 10 Motor base 11, 11 'A pair of ammunition machine 13 Limit switch 16 Gear motor drive control circuit

Claims (2)

[Claims] 1. A hollow shaft of a gear motor equipped with a motor base is fitted and connected to an end of a horizontal drive pulley shaft that is rotatably mounted on the head of an elevator body, and the gear motor is connected to the horizontal drive pulley shaft. The grain transfer elevator is characterized in that it is suspended in the air so that the gear motor can be freely rotated by the impact load at the time of startup, and both lower sides of the motor base and the elevator body are connected via an ammunition machine. 2. The motor base is provided with a limit switch for operating and stopping the gear motor, and the limit switch is changed from a closed state to an open state when the gear motor rotates beyond a predetermined allowable rotation range. The grain transfer elevator according to claim 1, wherein the operation of the gear motor is stopped.