JPH0481619A - Automatic spring-type fixed-quantity weigher - Google Patents

Abstract

PURPOSE:To fix a set quantity automatically and precisely by a construction wherein a level adjusting device of a switch for opening and closing a charging gate for a substance to be weighed is supported on the machine frame side and an operating device of this switch is provided on an elevator side. CONSTITUTION:Vertical levers 15 are supported axially by pins 18 at the fore ends of upper and lower parallel links 17 which are supported axially at a machine frame 1 by pins 16, while the lower parts thereof are connected in one body by an elevator 3 for a substance 14 to be weighed, such as rice. An elevating slide rack 7 is supported by guides 20 and a guide roller 21 on an erected plate 19 provided on the lateral side of the machine frame 1, while a pinion 8 gearing with the rack 7 is supported axially at the level of the guide roller 21, and a dial 9 for setting normal and reverse rotations of the pinion 8 is provided. By rotating this dial normally and reversely, the level of the upper end of the aforesaid rack 7 can be adjusted in elevation. A switch 4 is provided at this upper end and thus a level adjusting device 5 of the switch 4 is formed.

Description

[Detailed description of the invention] "Industrial application field" The present invention relates to a spring-type automatic metering scale.

[Conventional technology] Unlike expensive mechanical or electronic automatic metering scales, conventional spring-type scales have automatic weighing scales that set the quantitative value of the object to be weighed in advance and automatically stop the supply line when the quantitative value is reached. There was a problem that it was difficult to use for quantitative scales.

"Problems to be Solved by the Invention" The purpose of the present invention is to provide a spring-type automatic metering scale that has a simple mechanism, low cost, ease of use, is maintenance-free, can be used for a long period of time, and has good accuracy, operation, and reliability. shall be.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides a lifting platform suspended by a spring within the machine frame, and supports a level adjustment device for the switch for opening/closing the object input gate on the machine frame side. death,
The above-mentioned invention, wherein the spring-type automatic metering scale level adjustment device, which is provided with the operating device of the switch on the lifting platform side, is formed by an lifting sliding rack, a pinion meshing with the rack, and a forward/reverse rotation setting dial of the pinion. It consists of the spring type automatic quantitative scale described.

Place the empty container 10 on the lifting platform 3 and dial 9.
When the rack 7 is rotated forward or backward, the rack 7 is raised and lowered, and the switch 4 provided on the rack 7 is raised and lowered, so that the level position of the switch 4 can be adjusted. This level position is 1kg to 8k at the sign position of the scale 11 of the dial 9 and the arrow 12.
It can be adjusted by matching it to g, etc., and can be set to that scale amount. When the input gate 13 is opened and the object to be weighed 14 is thrown into the container 10, the weight of the container 100 increases and the container 100 moves down against the spring 2. Along with this lowering, the operating device 6 of the switch 4 also lowers, and when the switch 4 passes the position from top to bottom, the switch 4 is operated and the input gate 13 is closed by the signal, so that the input gate 13 is closed. The object to be weighed 14 having a set weight is accommodated.

"Example" A vertical rod 1 is installed with springs 2.2 in a machine frame 1 with openings on the top and sides.
5.15 pull-ups. This vertical rod 15.15 is supported by upper and lower parallel links 17.15 on the machine frame 1 via pins 16.16.
It is pivotally supported by a pin 18 and 18 at the tip of the spring 17, and is lowered against the spring 2, and is held in the middle of the machine frame 1 by the force of the spring 2. Further, the lower portions of the vertical rods 15.15 are integrally connected by a platform 3 for lifting and lowering objects 14 to be weighed such as rice. In addition, the vertical sliding rack 7 is guided by a guide 2 on an upright plate 19 provided on the side of the machine frame 1.
A pinion 8 supported by 0.20 and a guide roller 21 and engaged with the rack 7 is pivotally supported at the level of the guide roller 21, and a forward/reverse rotation setting dial 9 for the pinion 8 is provided to rotate the pinion forward/reverse. As a result, the upper end level of the rack 7 can be adjusted up and down, and the switch 4 is provided at the upper end to form a level adjustment device 5 for the switch 4. This switch 4 is closed by an operating device 6 provided on the vertical rod 15, and the switch 4 and the operating device 6 are contact type switches consisting of a limit switch 4' and an operating arm 6', but are non-contact proximity switches. There is no problem even if it is.

In that case, it is preferable to use a photoelectric switch or the like as the switch 4 and the operating device 6, regardless of the operating arm 6'. An object to be weighed supply hopper 22 is provided above the machine frame 1, and an input gate 13 is pivotally supported at the lower end opening by a bin 23 so as to be freely openable and closable.
The cylinder 25 is connected to the rotating arm 24 for operation, and the cylinder 25 is connected to the rotating arm 24 for operation.
is designed to open and close. In addition, 26 in the figure is a display scale, 26' is a pointer, 27 is a locking pin at the lower end of the spring 2, 28 is a traction screw for the spring 2, 29 is a zero point adjustment screw screwed into the screw 28, and 30 is a zero point adjustment screw. An engagement tool for adjusting the pulling position of the spring 2; 31 is a support pin for the operating arm 6'; 32 is a stopper; 33 is a support spring; in FIG. 34 is a rack and pinion for forward/reverse drive, and 37 is a support for the object to be weighed.

"Effects of the Invention J Since the present invention is configured as described above, it is possible to set a fixed amount in a spring-type scale for home use such as rice, which has a simple structure, and has the advantage that the set amount can be determined automatically and with high precision. There is.

[Brief explanation of drawings]

FIG. 1 is a side view showing a spring-type automatic quantitative scale of the present invention;
Figure 2 is a front view of the 1st section seen from the left, Figure 3 is a side view of the object being loaded, Figure 4 is a side view of the loading gate closed, and Figure 5 is a plan view of the machine frame. , Fig. 6 is a plan view of the upper parallel link, Fig. 7 is a plan view of the lower parallel link, Fig. 8 is a partially enlarged view of the spring in Fig. 1, Fig. 9 is a front view of the platform, and Fig. 10 is a plan view of the upper parallel link. The figure is a rear view of the stand, and FIG. 11 is a side view thereof. 1. Machine frame, 2. Spring, 3. Lifting platform, 4. Switch for opening/closing the object input gate, 5. Level adjustment device, 6
...Operating device, 7.Elevating sliding rack, 8.Pinion, 9.Forward/reverse rotation setting dial.

Claims (1)

[Scope of Claims] (1) A lifting platform suspended by springs is provided within the machine frame, a level adjustment device for a switch for opening and closing the object input gate is supported on the machine frame side, and a level adjustment device for the switch for opening/closing the object input gate is supported on the lifting platform side. A spring-type automatic quantitative scale equipped with an operating device. (2) The spring-type automatic metering scale according to claim (1), wherein the level adjustment device is formed by an elevating sliding rack, a pinion meshing with the rack, and a forward/reverse rotation setting dial for the pinion.