JP2574974Y2 - Scale - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scale provided with a detachable mounting plate.

[0002]

2. Description of the Related Art Conventionally, there is a weigher in which a placing plate on which an object whose weight is to be measured is placed on an upper surface thereof is made detachable from an apparatus body. Such a weigher can be removed from the apparatus main body for maintenance and the like. As a structure for mounting and dismounting the placing plate, a plate receiving frame is fixedly attached to a weight detecting unit for measuring the weight, and the plate is detachably attached to the plate receiving frame. Further, in such a structure, a plurality of stepped shafts whose tip side is narrower than the base side are erected on the lower surface of the dish, and the tip side of the stepped shaft is formed in a mounting hole formed in the dish receiving frame. The tray is attached to the support frame such that the tray is removably inserted into the support frame and placed on the support frame.

[0003]

SUMMARY OF THE INVENTION As described above, in a scale having a structure in which the stepped shaft is inserted into the mounting hole formed in the support frame and the plate is mounted on the plate receiving frame, the plate is mounted on the plate receiving frame. When mounting, it is difficult to align the mounting hole formed in the dish receiving frame with the stepped shaft,
There is a disadvantage that installation is difficult.

[0004]

A plate for placing an object whose weight is to be measured is provided on an upper surface thereof, and a plate receiving frame connected to the weight detector and supporting the plate from below is provided. At least three protruding columnar legs are formed on the peripheral edge of the pan, and these legs are removably inserted into mounting holes formed in the pan receiving frame, and the pan is inserted into the pan receiving frame. In the weigher that is detachably attached to the above, a chamfered portion serving as a guide surface at the time of insertion into the attachment hole is formed at the tip of the leg portion toward the inside of the dish.

[0005]

When the leg is inserted into the mounting hole formed in the dish receiving frame, the chamfer formed at the tip of the leg acts to guide the leg into the mounting hole.
The leg can be smoothly inserted into the mounting hole.

[0006] By the way, when the eccentric load is applied, the mounting plate rotates, and the end opposite to the side receiving the eccentric load rises, and the leg provided at this end rotates the mounting plate. As it moves, it comes out of the mounting hole formed in the dish receiving frame. However, the legs are tilted with the rotation of the mounting plate, and the outside of the mounting plate of the legs (hereinafter, referred to as “outside of the legs”) comes into contact with the mounting holes so that the legs are completely attached to the mounting holes. The rotation of the placing plate is stopped before the plate exits.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. The scale according to the present embodiment is an electronic toll scale that measures the weight of a postal matter and calculates the postage from the weight. Then, the calculated fee is displayed. First, as shown in FIG. 2, an operation key 3 is provided together with a display unit 2 for displaying a charge and a weight on the front side of the upper surface of the main body case 1, and a rectangular shape on which a measurement object (not shown) is placed. A loading plate 4 is provided.

Next, internally, as shown in FIGS. 1 and 3, a cantilever-shaped load cell 5 serving as a weight detecting section is provided along the upper surface of the main body case 1. One end of the load cell 5 is screwed to the main body case 1, and a flat plate receiving frame 6 along the upper surface of the main body case 1 is screwed to the other free end of the load cell 5. The electronic toll scale is attached to the tray receiving frame 6 by a stepped shaft 7 which is a leg on which the tray 4 is projected downward, and the free end of the load cell 5 is used for the tray 4. It is the structure which supports.

The dish 4 described above is provided with the above-mentioned stepped shafts 7 at four corners as shown in FIG. The stepped shaft 7 has a thin tip end and a thick root side, and a chamfer 7a is formed at the tip. The chamfered portion 7a is formed toward the inside of the dish 4 described above, that is, in this embodiment, only on the opposing sides of the stepped shafts 7 facing each other in the longitudinal direction of the dish 4 described above.

The tray receiving frame 6 is provided with mounting holes 8 opposed to the stepped shafts 7 of the tray 4 respectively.
Are formed. A rubber bush 9 with a flange 9 a is fitted in the mounting hole 8, and the distal end side of the stepped shaft 7 is inserted through the rubber bush 9 so as to be freely inserted into and removed from the mounting hole 8. The stepped portion 7b of the stepped shaft 7 is brought into contact with the plate receiving frame 6 via the flange 9a of the plate 9 and the tray 4 is placed on the plate receiving frame 6 so that the plate 4 is placed on the plate receiving frame. 6 attached.

In such a configuration, when an object to be measured is placed on the placing plate 4, the electronic toll scale causes a distortion in the load cell 5 supporting the placing plate 4, and based on the distortion, the measuring object is placed on the load cell 5. Is calculated, and the charge of the measured object is calculated from the weight and the information input via the key, and the weight and the charge are displayed on the display unit 2.

Here, the electronic toll scale can be removed from the apparatus main body by lifting up the placing plate 4 for cleaning or the like. Then, in order to mount the placing plate 4 on the apparatus body again, the tip of the stepped shaft 7 of the placing plate 4 is aligned with the mounting hole 8 formed in the plate receiving frame 6, and the stepped shaft 7 is attached. The plate 4 is inserted into the mounting hole 8 and the plate 4 is mounted on the plate receiving frame 6. At this time, in this embodiment, the chamfered portion 7a formed at the tip of the stepped shaft 7 is
Acts so as to guide the tip of the stepped shaft 7 into the mounting hole 8, so that the tip of the stepped shaft 7 can be smoothly inserted into the mounting hole 8 even if the position of the stepped shaft 7 and the mounting hole 8 are misaligned to some extent. Thus, the placing plate 4 can be easily attached to the apparatus main body.

When the loading tray 4 receives an eccentric load A at one end outside the position where the stepped shaft 7 is provided, as shown in FIG. 4, it is provided near this one end. The stepped shaft 7 is used as a fulcrum, and the other end is lifted up.
The stepped shaft 7 attached to the other end comes out of the mounting hole 8 formed in the plate receiving frame 6 as the plate 4 rotates. However, the stepped shaft 7 is tilted with the rotation of the platen 4, and the outside of the platen 4 of the stepped shaft 7 (hereinafter referred to as “outside of the stepped shaft 7”) is inserted into the mounting hole 8 of the plate receiving frame 6. Since the contact is made so as to hang, the rotation of the placing plate 4 is stopped before the stepped shaft 7 completely comes out of the mounting hole 8.

Here, if the length of the stepped shaft 7 is short, the stepped shaft 7 is likely to fall out of the mounting hole 8, so that the stepped shaft 7 needs to have a certain length. However, if a chamfered portion is provided at the tip of the stepped shaft 7, the substantial length of the stepped shaft 7 is reduced.

In the present embodiment, the chamfered portion 7a of the stepped shaft 7 is formed toward the inside of the placing plate 4, so that the stepped shaft which is caught in the mounting hole 8 when the placing plate 4 rotates. 7 can secure the outside length, and when an unbalanced load is applied to the placing plate 4, the stepped shaft 7 has a mounting hole as compared with the case where a chamfered portion is formed on the entire periphery of the tip of the stepped shaft 7. It is hard to fall out of 8.

Further, as described above, the chamfered portion 7 of the stepped shaft 7 is provided.
a is formed toward the inside of the plate 4 and the stepped shaft 7
This is particularly effective when the length below the step 7b is shorter.

As shown in FIG. 5, the chamfered portions 7a may be formed only on opposing sides of the stepped shafts 7 facing each other in the short axis direction of the placing plate 4. Stepped shafts 7 facing each other in the diagonal direction of the plate 4
The chamfered portions 7a may be formed only on the sides facing each other. Further, the position where the chamfer is formed is not necessarily limited to the sides facing each other,
What is necessary is just inside the placing plate 4.

[0018]

As described above, in the present invention, the chamfered portion is provided at the tip of the leg, so that when the leg is inserted into the mounting hole formed in the dish receiving frame, the chamfered portion is formed by the chamfered portion. Acting to guide the mounting holes, the legs can be smoothly inserted into the mounting holes, and the chamfered portion was formed toward the inside of the mounting plate, so that the mounting plate was rotated by the uneven load. Sometimes the outer length of the leg that will be hung on the mounting hole can be secured, and when an unbalanced load is applied to the mounting plate, compared to the case where a chamfer is formed on the entire circumference of the tip of the leg This has the effect that the legs are difficult to come out of the mounting holes.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance.

FIG. 3 is an exploded perspective view showing the placing plate, the plate receiving frame, and the rubber bush, which are turned upside down.

FIG. 4 is an explanatory view showing a state in which an eccentric load is applied.

FIG. 5 is a perspective view showing a modified example, in which a placing plate is turned upside down.

[Explanation of symbols]

 4 Placement pan 5 Weight detector 6 Dish receiving frame 7 Leg 7a Chamfer 8 Mounting hole

Continuation of the front page (72) Inventor Yukihiro Takada 6-78, Minamimachi, Mishima-shi, Shizuoka Prefecture Inside the Mishima Plant of Tokyo Electric Co., Ltd. (56) References Japanese Utility Model 60-59932 (JP, U) Japanese Utility Model 61-112234 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G01G 21/23

Claims (1)

(57) [Scope of request for utility model registration] 1. A plate for mounting an object whose weight is to be measured on an upper surface thereof, and a plate receiving frame connected to a weight detector and supporting the plate from below, and having a columnar shape projecting downward. At least three legs are formed on the peripheral edge of the pan, and the legs are removably inserted into mounting holes formed in the pan receiving frame, and the pan is detachably attached to the pan receiving frame. In the attached scale, a chamfered portion serving as a guide surface at the time of insertion into the mounting hole is formed at the tip of the leg toward the inside of the dish.