JPH0222653Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a weighing device equipped with a load cell.

(Prior art and its problems) Conventionally, when an impact load is applied to a weighing pan in a weighing device, the impact load is applied directly to the load cell, which may impair the accuracy of the load cell or cause it to be damaged. Therefore, in the conventional device, as shown in FIG. 18, a base 5' is provided on the fulcrum side of the load cell 1', and a plate support member 4' is provided on the important side. Body pieces R, R
... is provided to support the weighing pan 12' (for example, Japanese Utility Model Application No. 137030/1983).

However, in the conventional structure in which the elastic pieces R, R, .

In addition, in order to construct a scale with a high load such as a platform scale, the base plate and tray plate must have strength, so adding a reinforcing structure would increase the height and complicate the structure, making the scale difficult to use. The weight also increases, leading to higher costs.

In addition, as another conventional device for alleviating the impact of a load cell, as seen in Japanese Patent Laid-Open No. 56-84523, an elastic member arranged parallel to the axial direction of the load cell is attached to the important side of the load cell, and this elastic member is A pan support bracket is attached to the member, and a measuring pan is attached to it.

However, in the above conventional structure, in the case of a weighing device that has a large maximum weighing capacity and a large plate area compared to a load cell, both the torsional moment and the bending moment due to the unbalanced load act greatly, so a flat plate is used against the unbalanced load. The shock absorbing member cannot withstand the damage, resulting in permanent deformation such as twisting or buckling. In addition, if the thickness and width of the flat plate used as a buffer member are increased to increase its strength, the deflection will be so small that the buffering effect will not be sufficient for shocks in the center, and it will deflect unnecessarily against uneven loads. This causes the problem of storage.

Therefore, the above conventional structure is not suitable for a weighing device with a large maximum weighing capacity and a large pan area.

The present invention has been developed in view of the conventional circumstances, and even if an impact load acts on the weighing pan, the impact load does not directly act on the load cell body, and even if the weighing device has a large maximum weighing capacity and a large pan area compared to a load cell, It is an object of the present invention to provide a device that ensures sufficient cushioning effect and strength, is structurally simple and easy to process, is thin, and has excellent usability.

(Technical means for solving the problem) In the measuring device of the present invention, the base on which the fulcrum side of the load cell is attached has at least a pair of horizontally arranged support members, and a support member directly or indirectly connected to both ends of the support members. A support leg is attached to the support leg, and a fixing beam that connects the support member and fixes the fulcrum side of the load cell to the center, and a plate support member that attaches the emphasis side of the load cell can be elastically deformed with respect to the mounting member against impact. The beam member is arranged horizontally on the support member, the mounting member is at least partially housed within the height between the support members, and the beam member is arranged horizontally on the support member. and the weight side of the load cell is fixed at the center, the plate holders are attached to the tops of both ends of the beam member, a weighing pan is placed on this plate holder, and an impact load is applied to the plate. In this case, at least a part of the beam member is made elastically changeable in the bending direction.

(Embodiment) An example of the embodiment of the present invention will be described with reference to FIGS. 1 to 4. In the figure, 1 is a load cell, and a plate support member 4 is provided on the important side 2 and a base 5 is provided on the fulcrum side 3. It becomes.

The base 5 has a pair of supporting members 8, 8 made of highly rigid L-shaped steel arranged in parallel.
A fixed beam 9 made of a square bar is provided across the sides and formed into a substantially H shape.A load cell 1 is provided at the center of the fixed beam 9, and a protection plate 1 is provided below the load cell 1.
Place 0.

The support members 8, 8 are provided with support legs 20 at the lower portions of both ends thereof.

The plate support member 4 has beam members 6, 6 made of plate materials arranged to face the support members 8, 8, and a mounting member 11 formed in a U-shape by attaching L-shaped steel to both ends of the beam members 6. , 6, and one end of the load cell 1 is attached to the center of the attachment member 11.

The beam members 6, 6 are formed such that the portion to which the mounting member 11 is attached is a rigid body portion, and the plate width becomes narrower from this portion toward each end side to facilitate obtaining elastic action, and each end is provided with rubber. A plate receiving part 7, 7, 7, 7 made of an elastic member such as material is provided, and the plate receiving part 7, 7,
A weighing pan 12 formed into a box body is mounted on 7, 7.

Therefore, even if an impact load is applied to the weighing pan 12 in the embodiment, it is buffered by the beam members 6, 6, so that no impact is applied directly to the load cell 1. Furthermore, since the base 5 has high rigidity, the load cell 1 does not tilt even when a large object is mounted.

As shown in FIG. 3, the base 5 has a simple structure with supporting members 8, 8 made of highly rigid L-shaped steel attached to the load cell 1 in order to effectively increase the rigidity.
The beam members 6 are arranged parallel to the axial direction of the base 5, and the beam members 6 are arranged in a substantially H-shape in which the support members 8, 8 are arranged at right angles. Intersects with 9.

However, in this example, the intersecting part is
A mounting member 11 having a rigid structure, which is the plate-shaped beam members 6, 6 of the pan support member 4 and constitutes the pan support member 4, is arranged between each of the support members 8, 8 of the base 5 and within the height thereof. Therefore, compared to the height required to ensure the rigidity of the base 5, the increase in the height of the entire device due to the configuration of the plate support member 4 can be minimized, and the device can be made thinner.

In the above embodiment, the highly rigid base 5 is shown to have a substantially H-shaped structure, but in order to provide rigidity to the base 5, a fixed beam 9 that holds the fulcrum side of the load cell is required.
and the support members 8, 8 that directly or indirectly connect the support legs 20 that are in contact with the floor need to be connected at some point, but they do not necessarily have to be configured in a substantially H shape. .

Even in that case, the height of the entire device can be reduced by storing a part of the beam members 6, 6 of the tray support member 4 and the mounting member 11 between the support members 8, 8 of the base 5 and within the height thereof. can be made smaller and thinner.

Furthermore, in the embodiment described above, the beam members 6, 6 have a structure in which the center portions are fixed to both sides of the mounting member 11, and each end supports the plate holders 7, 7.
When an impact load is applied to the weighing device, it deflects as a cushioning material, and even in the case of a weighing device with a large maximum weighing capacity and a larger pan area than a load cell, it can be moved to the center of the weighing pan without receiving a torsional moment due to an uneven load. The bending moment is less than 4 times the impact of an extreme unbalanced load compared to the same magnitude of impact, and the weighing pan has a sufficient buffering effect against impact loads both at the center and at the four corners. Ensures strength against unbalanced loads.

Incidentally, it is more effective if the beam members 6, 6 are spring members.

Next, another example of the plate support member will be shown.

If the plate support member 4a of the second embodiment is explained with reference to FIG. 5, the beam member 6 of the first embodiment,
6 and the mounting member 11 are integrally molded, and the other configurations are the same as in the first embodiment.

To explain the plate support member 4b of the third embodiment with reference to FIG. The end portions of the plates 6, 6 are provided with support holes 7b, 7b, 7b, 7b between the ends of the plates 6, 6 and the notches b, 7b, 7b, 7b are provided, and a plate holder (not shown) is attached, and weighed. Make sure to support the plate.

To explain the plate support member 4c of the fourth embodiment with reference to FIG. to make it easier to obtain an elastic effect. These long holes c, c, c, c and each plate material 6c, 6c
The support holes 7c, 7 of the pan holder that supports the weighing pan between the
Holes c, 7c, and 7c are opened to form beam members.

The plate support member 4d of the fifth embodiment will be explained with reference to FIG. Support holes 7d, 7d, 7d for attaching plate holders for supporting weighing plates to plate springs d, d, d, d, respectively;
7d is bored to form a beam member.

FIGS. 10 and 11 show the plate support member 4e of the sixth embodiment.
To explain with the drawing, plate springs e, e are screwed to the top and bottom of each end of a substantially H-shaped mounting member 11d, and a countersunk support 7e is provided between the plate springs e, e at the tips of the plate springs e, e, respectively. and use it as a beam member.

The support body 7e has a lobular structure that bends vertically due to a large load, and can always support the weighing pan in the vertical direction when supporting the pan holder and carrying the weighing pan.

If the plate support member 4f of the seventh embodiment is explained with reference to FIG. 9, this embodiment is similar to the third embodiment shown in FIG. , 6f are provided with notches f and f on the upper and lower end sides, respectively, to facilitate obtaining an elastic effect. Support holes 7f, 7 in which a plate holder for supporting a weighing plate is installed between these notches f, f and the ends of the respective plate materials 6f, 6f
Open holes f, 7f, and 7f to form beam members.

To explain the tray support member 4g of the eighth embodiment with reference to FIG. 12, this embodiment is a modification of the second embodiment shown in FIG. 5, and the beam members 6g, 6g and the mounting member 11 are integrally molded. At the same time, the end sides of the beam members 6g, 6g are made to protrude outward, and in this way, a wider weighing pan can be mounted.

The plate support member 4h of the ninth embodiment will be explained with reference to FIG. 13. The member 4h is integrally molded with beam members 6h, 6h, . . . protruding from three locations on each side. Up to the eighth embodiment, only four tray holders were provided, but more tray holders may be provided in this manner.

Next, another example of the base will be shown.

The base of the tenth embodiment will be explained with reference to FIG.
In this way, the rigidity can be further increased.

The base 5j of the eleventh embodiment will be explained with reference to FIG. 15. This embodiment is an example in which the base 5 of the first embodiment is integrally molded.

The base 5n of the twelfth embodiment will be explained with reference to FIGS. 16 and 17. The base 5k of this embodiment is an integrally molded box with increased rigidity.

Note that a thin plate-like drip-proof cover may be attached to the bottom and side surfaces of the base 5.

Further, when the cross section of the support member is L-shaped, the beam member may be placed at a position lower than the upper end of the vertical side.

However, in that case, the upper surface of the tray holder shall be at a higher position than the upper end of the vertical side of the support member.

In addition, a structure in which the beam members constituting the tray support member are arranged horizontally on the support member of the base means that the beam member does not necessarily have to be directly above the support member, but rather in a position close to the support member, such as diagonally above. Good to have.

(Effects) According to the present invention, the impact load applied to the weighing pan is buffered by the elasticity of the beam member of the pan support member, so that the load cell will not be damaged or the accuracy will not be degraded.

In addition, since the beam member of the plate support member is made of a plate material and has a buffering effect on itself, it can be used even in devices with a large maximum weight and a large plate area compared to a load cell.
To withstand uneven loads while obtaining a sufficient buffering effect in the central portion, and to obtain an appropriate buffering effect. Therefore, it is possible to remove the impact load on the load cell against the central impact and the impact on the uneven load, thereby increasing the durability of the load cell.

Further, the beam members forming the tray support member are a pair of elastically deformable members capable of absorbing shock, and the mounting member is at least partially housed within the height between the pair of support members forming the base. With this arrangement, the device can be made thinner and the height of the weighing pan can be lowered, and objects to be weighed can be easily loaded and unloaded on high weighing platform scales.

[Brief explanation of the drawing]

Fig. 1 is a plan sectional view of the first embodiment of the present invention;
The figure is a longitudinal sectional front view of the same, Fig. 3 is a three-dimensional view of the same, Fig. 4 is a three-dimensional view of the tray support member, and Figs.
9 is a three-dimensional diagram of the seventh embodiment, FIG. 10 is a three-dimensional diagram of the sixth embodiment, and the eleventh embodiment is a three-dimensional diagram of the fifth embodiment.
The figure is a cross-sectional view of the same essential parts, Figures 12 to 16 are three-dimensional views of the eighth to twelfth embodiments, respectively, Figure 17 is a cross-sectional view of the stopper in Figure 16, and Figure 18 is a longitudinal cross-section of the conventional example. It is a diagram. In the figure, 1...Load cell, 2...Important side, 3...
...Fully point side, 4, 4a, 4b, 4c, 4d, 4e,
4f, 4g, 4h... plate support member, 5... base,
6, 6h...Beam member, 7...Plate holder, b, f...
Notch, c... Long hole, d, e... Leaf spring, 8... Supporting member, 9... Fixed beam, 11... Mounting member, 20
...Support leg.

Claims (1)

[Scope of utility model registration request] A base on which the fulcrum side of the load cell is attached includes a pair of support members disposed at least horizontally, support legs are attached directly or indirectly to both ends of the support members, the support members are connected, and the fulcrum side of the load cell is placed in the center. A fixed beam is fixed to the load cell.
It consists of a pair of beam members that can be elastically deformed against impact and a tray receiver, the beam members being arranged horizontally on the support members, and the mounting member having at least a portion within the height between the support members. The beam member is connected to the load cell and the weighted side of the load cell is fixed at the center, and the plate holder is attached to the top of both ends of the beam member. A weighing device in which at least a portion of the beam member can be elastically changed in a bending direction when an impact load is applied.