JPH07260559A - Electronic balance with windshield case - Google Patents

Abstract

PURPOSE:To provide an electronic balance with a windshield case not inclined even in the case of an opening/closing plate being moved backward while preventing the damage of the front plate of the windshield case. CONSTITUTION:A cushioning member 38 is insert-mounted to the front end of an opening/closing plate so as to relieve impact caused by the collision of a front face plate 30. Since this cushioning member 38 is placed in proximity to a guide frame 27, when the opening/closing plate moves backward, the inclination stop face of the cushioning member 38 comes in contact with the guide frame 27 before the opening/closing plate. The opening/closing plate is not therefore inclined in a large degree, and the opening/closing plate can be closed by one hand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic scale equipped with a windshield case, and more particularly to an electronic scale with a windshield in which a transparent opening / closing plate constituting one surface of the windshield is slidable.

[0002]

2. Description of the Related Art An electronic scale for measuring a minute weight is provided with a windshield case which separates the weighing chamber from the outside in order to eliminate the influence of air flow. The windshield case is formed of a transparent plate such as a glass plate so that the sample placed on the weighing dish can be visually recognized from the outside. There are two types of windshield cases, a square type and a circular type. The square type is provided with an opening / closing plate for moving the sample back and forth when taking in and out.

A conventional example of an electronic scale having a windshield case of this type will be described with reference to FIG. Reference numeral 1 denotes an electronic scale main body, and a synthetic resin main body case 2 has a weighing mechanism and an electronic circuit incorporated therein.

A windshield case 3 is mounted on the body case 2, and is screwed to the body case 2 at the base portion 4. The outer frame 5 of the windshield case 3 includes a base portion 4, a rear wall 6 standing from the rear end of the base portion 4, and a pair of guide frames 7 protruding from above the rear wall 6 toward the front. Has been formed. Each of the outer frames 5 is made of a metal such as aluminum or a synthetic resin having a strength equivalent to that of the metal. By forming the outer frame 5 in this manner, the pillar serving as the support frame on the front side is not necessary, and the pillar does not obstruct the visibility of the sample on the weighing pan.

On the upper surface and the left and right side surfaces of the windshield case 3,
A top plate and a side plate 8 made of a transparent glass plate are provided as opening and closing plates, and the tip ends are fitted into the guide frames 7 and the guide grooves 9, 9 recessed in the base part 4 to be movable in the front-rear direction. Has become. Further, a synthetic resin handle 10 is attached to the outer surfaces of the top plate and the side plate 8. On the front surface of the windshield case 3, a front plate 11 made of a transparent glass plate, an acrylic plate, or the like is screwed and fixed to the front faces of the guide frame 7 and the base portion 4.

The load of the sample placed on the weighing pan 13 of the weighing chamber 12 is transmitted to the weighing mechanism via a load transmission mechanism arranged below the weighing dish.

[0007]

As described above, the electronic balance having the above-described structure eliminates the front pillar and thus the weighing chamber 12
Although the inside is good in visibility, when the top plate and the side plate 8 are closed toward the front, they come into direct contact with the front plate 11, which is a glass plate. There is a problem that the face plate is damaged.

Further, as shown in FIG. 9, the upper surface plate and the side surface plate 8 move toward the rear of the windshield case 3 as the guide groove 9 moves.
Therefore, the corner 8a of the front edge comes into contact with the inner surface of the guide groove 9 by being tilted by its own weight. When moving from this state in the front-rear direction, a large frictional force is generated, which not only hinders smooth movement, but also causes annoying sliding noise. Further, the opening and closing of the top plate and the side plate 8 are operated by gripping the handle 33 with one hand, and the static friction force exceeds that with one hand, which causes a problem that it is difficult to move.

Further, when the side plate 8 is a glass plate and the guide frame 7 is a metal material, the guide frame 7 is worn by the contact with the side plate 8 and the abrasion powder is caught on the weighing pan 13 to cause a measurement error. It was the cause.

As a means for preventing the opening / closing plate from tilting, the guide rail may be projected further rearward from the rear wall 6 of the electronic scale, but its outer size becomes large and it is not practical.

In Japanese Utility Model Laid-Open No. 4-110926, as shown in FIG. 10, the tilting of the opening / closing plate is prevented by an auxiliary operation mechanism using the rack 14 and the pinion 15. This auxiliary operation mechanism includes a rotary shaft 16 pivotally supported by the upper and lower outer frames 5 in parallel with the side plate 8, a pinion 15 fixed above and below the rotary shaft 16 and rotating with the rotary shaft 16, and an upper end of the side plate 8. And a rack 14 arranged along the lower end and meshing with the pinion 15. When the side plate 8 is moved, the pair of upper and lower racks 14 and the pinion 15 are engaged with each other and rotate in synchronization with each other, so that the upper end and the lower end of the side plate 8 move equidistantly, and as a result, the side plate 8 does not tilt. However, the electronic scale equipped with this auxiliary operation mechanism has a complicated structure and is expensive, and the rotary shaft 16 is not suitable for the weighing chamber 1.
This hinders the loading and unloading of the sample to and from the sample 2, and the visibility in the weighing chamber 12 is also impaired.

The present invention has been made in order to solve the above problems, and does not damage the front plate, does not tilt even if the opening / closing plate moves rearward, can smoothly move back and forth, and has a wear component. It is an object of the present invention to provide an electronic scale with a windshield that can reduce the amount of waste and does not increase in size.

[0013]

In order to achieve the above-mentioned object, the invention of claim 1 sandwiches a cushioning member 38 having a U-shaped cross section at the front end of an opening / closing plate constituting one surface of the windshield case 24. The cushioning member 38 is located close to the guide frame 27.

The invention according to claim 2 further has stepped portions 386 formed at both ends of the cushioning member 38 sandwiched at the front end of the upper surface plate 28, and the stepped portion 386 is inserted into the guide groove 34.
And a wall surface 385 adjacent to the guide frame 27.

According to the third aspect of the present invention, a plate-shaped cushioning member 38 is disposed on the opening / closing plate forming one surface of the windshield case 24 so as to protrude from the front edge of the opening / closing plate, and is located close to the guide frame 27. It is characterized by that.

The invention of claim 4 is further characterized in that a grip 387 is provided integrally with the cushioning member 38.

[0017]

In the first aspect of the invention, since the cushioning member having a U-shaped cross section is sandwiched at the front end of the opening / closing plate, the front surface of the opening / closing plate does not directly contact the front plate. Further, when the opening / closing plate moves rearward, the cushioning member comes close to the guide frame, so that the opening / closing plate does not tilt much and the large static friction force does not occur because the cushioning member comes into contact with the guide frame before the opening / closing plate. The open / close plate can be closed with one hand. Further, since the corners of the opening / closing plate do not bite into the guide frame, abrasion powder of the guide frame does not occur.

According to the second aspect of the present invention, since the sliding guide surface, which is the wall surface of the cushioning member, comes into contact with the guide frame before the side surface of the top plate, the top plate slides smoothly even in the horizontal direction.

According to the third aspect of the present invention, since the plate-shaped cushioning member is disposed on the opening / closing plate forming one surface of the windshield case so as to protrude from the front edge of the opening / closing plate, the front surface of the opening / closing plate directly faces the front plate. Do not touch. Further, when the opening / closing plate moves rearward, the cushioning member comes close to the guide frame, so that the opening / closing plate does not tilt much and the large static friction force does not occur because the cushioning member comes into contact with the guide frame before the opening / closing plate. The open / close plate can be closed with one hand. Further, since the corners of the opening / closing plate do not bite into the guide frame, abrasion powder of the guide frame does not occur.

According to the fourth aspect of the present invention, since the handle that slides the opening / closing plate in the front-rear direction and the cushioning member are integrated, the cushioning member can be integrally molded at the same time as the handle that is normally attached to the opening / closing plate.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is an exploded perspective view showing a state in which an upper plate and a front plate are assembled, FIG. 2 is a central longitudinal sectional view of an electronic scale, FIG. 3 is a lateral sectional view taken along the line AA of FIG. 2, and FIG. FIG. 5 is a plan view of the scale, and FIG. 5 is an enlarged sectional view of an essential part with a part of FIG. 3 omitted.

First, an outline of the structure of the entire electronic scale according to the present invention will be described. In the figure, reference numeral 20 denotes an upper plate type electronic scale main body, which is made of synthetic resin and has an upper case 21a and a lower case 21.
As in the conventional example, the main body case 21 obtained by superimposing b contains a measuring mechanism, an electronic circuit, and the like.

In front of the upper case 21a, there are provided a liquid crystal display section 22 for displaying measurement results and measurement conditions, and a plurality of operation switches 23 for inputting measurement range setting, measurement start and end, and the like.

As shown in FIG. 2, a rectangular parallelepiped-shaped windshield case 24 is placed on the electronic scale main body 20 via an attachment 31 made of a synthetic resin adapted to the outer shape of the upper case 21a. Although the windshield case 24 is fixed to the upper case 21a with screws, it can be separated from the main body of the electronic scale when performing measurement in a range where the influence of the air flow does not pose a problem.

The windshield case 24 is individually assembled before being fixed to the electronic scale main body 20, and has an outer frame composed of a bottom plate 25, a rear wall 26, and a pair of guide frames 27, and is attached to this outer frame. The upper plate 28 which is moved back and forth
And the left and right side plates 29a and 29b, and the fixed front plate 3
It is composed of 0 and 0.

The bottom plate 25 is a metal plate made of stainless steel, which is fixed in advance on the attachment 31 which is a square frame, and which stands up from the peripheral edge.
a is projected by press working, and air is exhausted from a rear discharge port H through a ventilation path L formed by the upper case 21a. An opening for inserting the pin 33a vertically extending from the weighing pan 33 is formed in the center of the step portion 25a, and an annular windshield ring 32 is placed so as to surround the weighing pan 33. The load of the sample placed on the weighing pan 33 is transmitted to the load transmission mechanism of the electronic scale main body 20 via the pin 33a and a pin receiver (not shown). The attachment 31 is wider than the bottom plate 25, and on the left and right sides thereof, guide grooves 34a into which the lower ends of the side plates 29a and 29b are fitted are formed.

The rear wall 26 is integrally provided with a support frame portion 26a on the rear side. The support frame portion 26a is erected along the rear end of the upright portion 25a, and both sides of the upper end of the support frame portion 26a serve as inclined support surfaces 26b that are inclined outwardly, and cantilever support a pair of guide frames 27 by screwing.

The guide frame 27 is formed by extruding aluminum into a substantially cylindrical shape, and has a guide groove 34 into which the upper end of the side surface plate 29 is inserted downward along the longitudinal direction thereof.
b, and a guide groove 34c into which the side portion of the upper surface plate 28 is inserted is formed on the inner side in the horizontal direction. The left and right side plates 29a and 29b are provided between the guide grooves 34a and 34b, and the upper plate 28 is horizontally provided between the guide grooves 34c facing each other on the left and right.

The left and right side plates 29a and 29b and the upper plate 28
Is an opening / closing plate that is guided so as to slide in the front-back direction in the guide groove.The opening / closing plate is moved backward so that it is easy to work when placing or removing the measurement sample on the weighing pan. It

As is apparent from FIG. 1, the windshield case 24
The front plate 30 is attached to the front surface of the guide frame 27 and the front end bent portion of the bottom plate 25 so as to cover the front surface of the bottom plate 25.
It is attached by a and 35b. This front plate 30
Supports the front end of the cantilever-supported guide frame 27 and is formed to be slightly larger than the outer frame of the windshield case 24, and acts as a retainer for the open / close plate to the front. Reference numeral 36 is a decorative plate that covers the head of the mounting screw 35b.

The upper plate 28 and the side plates 29a, 29
Although a transparent glass plate is used for b and the front plate 30 so that the inside of the weighing chamber 37 can be visually recognized, a hard synthetic resin plate such as a transparent acrylic plate may be used. Further, the top plate 28 may be an opaque metal plate.

The weighing chamber 37 that surrounds the weighing pan 33 is separated from the outside by the windshield case 24 thus constructed, and does not affect the measurement of the electronic balance even if the external air flow changes.

Next, the cushioning member 38 used for the upper plate 28 will be described. The cushioning member 38 is integrally formed of the material described below, and is the upper plate 2 that is an opening / closing plate.
8 and the left and right side plates 29a and 29b are attached to the front ends thereof, respectively.

The cushioning member 38 sandwiched between the front end of the upper plate 28 includes an elongated outer plate 381 and an inner plate 382, and a U-shaped connection for connecting the outer plate 381 and the inner plate 382 in parallel. It is formed in a U-shaped cross section by the portion 383. The distance between the outer plate 381 and the inner plate 382 before attachment is set to be slightly smaller than the thickness of the upper plate 28, and when attached to the front end of the upper plate 28, the elasticity of the U-shaped connecting portion 383 causes the upper plate 28 to move.
Sandwich both sides of. Due to the elastic action of the U-shaped connecting portion 383, the cushioning member 38 is attached to the upper surface plate 28 without rattling, but in order to fix it more securely, it is adhered with an adhesive agent, or the upper surface plate 28 and the inner plate 382 are screwed. Drill and screw.

Since the cushioning member 38 is attached to the front end of the upper plate 28 in this manner, the upper plate 28 does not directly collide with the front plate 30 when it is closed forward, and the cushioning member 38 gives a shock. Therefore, the front plate 30 is not absorbed and a large collision noise is generated, and the front plate 30 is not damaged by the impact.

In addition, as shown in FIG.
Are attached along the front edge of the top plate 28,
Since the entire front edge of the upper surface plate 28 facing the back surface of 0 is covered, the gap between the upper surface plate 28 and the front surface plate 30 is completely sealed by the cushioning member 38 when the upper surface plate 28 is closed. The chamber 37 can be more completely isolated from the outside.

Since the inner plate 382 is located inward of the upper plate 28, when the upper plate 28 is moved rearward, the inner plate 382 comes into contact with the upper end of the rear wall 26 and acts as a stopper for the rearward movement.

In FIG. 5, on both sides of the outer plate 381 which are orthogonal to the longitudinal direction, stepped portions 386 are formed, each of which has a penetration portion 384 and a wall surface 385 along the both sides. The penetration part 384 is formed thinner than the main body of the outer plate 381, and only the penetration part 384 and the tip of the upper plate 28 are fitted into the guide groove 34c of the guide frame 27, and the outer plate 381 is inserted.
The body cannot be fitted. As a result, the intruding portion 384 is close to the guide frame 27, and the gap δ1 with the guide frame 27 is larger than the upper surface of the upper plate 28 and the guide groove 3.
It is narrower than the gap δ2 from the inner surface of 4c.

The wall surface 385 is close to the guide frame, and the gap δ3 between the wall surface 385 and the guide frame 27 is
It is formed so as to be closer than the gap δ4 between the tip of the upper surface plate 28 and the guide groove 34c.

Therefore, when the upper surface plate 28 is moved in the front-rear direction, the wall surface 385 contacts the guide frame 27 before both surfaces of the upper surface plate 28 contact the guide grooves 34c of the guide frame 27. Therefore, the wall surface 385 acts as a sliding guide surface, and the upper surface plate 28 always slides smoothly along the guide frame 27.

When the upper plate 28 is moved rearward so as to open, it begins to incline due to its own weight, but immediately the intruding part 384 comes into contact with the inner surface of the guide groove 34c, and the intruding part 384 is used as the tilt stop surface to move the upper plate 28. It does not tilt further.
Further, since the cushioning member 38 having a small sliding resistance is in contact with the inner surface of the guide groove 34c, the upper surface plate 28 can be smoothly opened and closed with one hand, and the abrasion powder from the guide frame 27 can be suppressed.

As is apparent from FIG. 1, a handle 387 for moving the upper plate 28 is provided at the center of the outer plate 381.
It is formed integrally with 1. It is usual to attach a synthetic resin handle to the opening / closing plate made of a glass plate. If the handle 28 and the cushioning member 38 are integrated with each other, the number of parts does not increase and it can be manufactured with one die, which is economical. is there.

In FIG. 6, the step portion 386 causes the entry portion 384.
The wall surface 385 and the 1st modification of FIG. 5 are shown. The step portion 386 is formed by a ridge 389 provided from both side edges so as to be orthogonal to the longitudinal direction of the outer plate 381,
The upper surface of the protrusion 389 corresponds to the intruding portion 384 shown in FIG. 5, and the inner surface thereof corresponds to the wall surface 385. In the guide groove 34c of the guide frame 27, a guide protrusion 27a is vertically provided from the upper end of the opening along the longitudinal direction, and the inner side surface thereof is the wall surface 38.
5 is facing. Top plate 2 with cushioning member 38 attached
8 is inserted into the guide groove 34c, the intrusion portion 38
4 and the guide frame 27 are closer to each other than the gap δ2 between the upper surface of the upper plate 28 and the inner surface of the guide groove 34c, and the gap δ3 between the wall surface 385 of the ridge 389 and the inner surface of the guide ridge 27a is δ3. It is formed so as to be closer than a gap δ4 between the other side surface of the upper surface plate 28 facing the same direction as the wall surface 385 and the inner side surface of the guide groove 34c facing this side surface.

When the upper surface plate 28 is moved rearward, the upper surface of the intruding portion 384 contacts the inner surface of the guide groove 34c to prevent the upper surface plate 28 from tilting as a tilt stop surface. Further, the wall surface 385 functions as a sliding guide surface to regulate the horizontal movement of the upper surface plate 28, and moves the upper surface plate 28 back and forth without rattling, and exhibits the same effect as in FIG.

In the embodiment shown in FIGS. 5 and 6, step portions 386 are formed on the upper portions of both ends of the outer plate 381, and the intruding portion 384 is used as the tilt stop surface and the wall surface 385 is used as the sliding guide surface. The tilt stop surface and the slide guide surface may be formed separately without forming the step 386 as shown in FIG.

In FIG. 7, the buffer member 38 is close to the guide frame 27, and the upper surface of the outer plate 381 and the guide frame 27.
The gap δ1 between the upper surface plate 28 and the inner surface of the guide groove 34c is closer to the gap δ1. That is, the upper surface plate 28 and the outer plate 38 are provided in the guide grooves 34c of the guide frame 27.
1 is inserted, and the upper surface of the outer plate 381 serves as a tilt stop surface.

The outer surface 388 of the inner plate 382 and the outer surface 38
The gap δ3 with which the guide frame 27 abuts 8 is formed closer to the gap δ4 between the side surface of the upper surface plate 28 and the inner side surface of the guide groove 34c, and the outer side surface 388 serves as a sliding guide surface.

When the top plate 28 moves rearward, the outer plate 38
The upper surface of 1 contacts the inner surface of the guide groove 34c, and the inner plate 382
The outer surface 388 regulates the movement in the horizontal direction and acts as a tilt stop surface and a slide guide surface, respectively, as in the first and second embodiments.

Next, the cushioning member 38 sandwiched between the front ends of the side plates 29 will be described with reference to FIGS. 1, 3 and 5.

Like the cushioning member 38 for the upper plate 28, this cushioning member 38 also has an outer plate 381, an inner plate 382, and a U-shaped connecting portion 3.
It has a U-shaped cross section. Top plate 28
The same parts as those of the cushioning member 38 for use are given the same reference numerals, and detailed description thereof will be omitted.

The upper end surface of the outer plate 381 is a tilt stop surface that contacts the guide frame, and the gap δ1 between the upper end surface of the outer plate 381 and the guide frame 27 is the upper surface of the side plate 29 and the inner surface of the guide groove 34b. Is closer than the gap δ2.
If δ1 and δ2 are set to have the same positional relationship, the upper end surface of the inner plate 382 can be used as the tilt stop surface instead of the outer plate 381.

The buffer member 38 for the side plate 29 is the side plate 2
It is attached along the front edge of 9 and covers the entire front edge of the side plate 29 so as not to create a gap with the front plate 30.
A grip 387 for opening and closing the side plate 29 is integrally provided at the center of the outer plate 381.

In the cushioning member 38 thus constructed, the bilaterally symmetrical cushioning member 38 is sandwiched between the same molded transparent plates, which are arranged as the left and right side plates 29a and 29b.

When the side plate 29 is moved backward so as to be opened, the side plate 29 begins to incline by its own weight, but the outer plate 381 (inner plate 382).
The upper end surface of the side plate 29 comes into contact with the lower surface of the guide guide frame 27, and the side plate 29 does not further tilt with the upper end surface of the outer plate 381 as the tilt stop surface.

When the side plate 29 is moved further rearward, the inner plate 382 located inside the side plate 29 comes into contact with the side portion of the rear wall 26, and acts as a retainer for the side plate 29 when moving rearward. To do.

Even if the side plate 29 is stopped in a tilted state,
The cushioning member 38 contacts the guide frame 27 so that the side plate 2
Since the contact of 9 with the guide frame 27 is avoided, there is no possibility that a large static frictional force is generated between the guide frame 27 and the guide frame 27, or a wear amount is generated.

When the side plate 29 is closed, the cushioning member 38 eliminates the gap between the side plate 29 and the front plate 30 and can completely block the outside air as a windshield.

In the above embodiment, the cushioning member 38 has a U-shaped cross section and is sandwiched at the front end of the opening / closing plate. However, a plate-like cushioning member 38 (not shown) is used. The opening / closing plate may be arranged so as to slightly project from the front edge of the opening / closing plate. This plate-shaped cushioning member 38 is easier to mold, and the opening / closing plate 2 can be fixed by a fixing means such as screwing or an adhesive.
It is fixed at 9.

The cushioning member 38 described in detail above must absorb at least the impact of the opening / closing plates 28, 29a, 29b on the front plate 30. The opening / closing plates 28, 29a,
Since it is sandwiched at the front end of 29b, it is required to have some elasticity. From this, synthetic rubber such as silicone rubber and fluororubber, or synthetic resin such as ABS, polystyrene, vinyl chloride, and polyester when the sliding characteristics with the guide frame 27 are added, the guide frame 27 is further added.
In order to reduce the frictional resistance with respect to sliding smoothly, it is effective to make the sliding portion self-lubricating, for example, polyacetal.

[0061]

As described above, according to the present invention,
Since a cushioning member 38 having a U-shaped cross section is sandwiched at the front ends of the opening / closing plates 28, 29a, 29b, the opening / closing plates 28, 29a,
Front plate 3 which is a glass plate even when 29b is closed toward the front
No direct contact with 0, no abnormal collision noise is generated, and the front plate 30 is not damaged. Further, in order to improve the visibility, it is effective to apply it to the windshield case 24 without the pillars.

Further, even if the opening / closing plates 28, 29a, 29b are moved rearward, one end of the cushioning member 38 will not move to the guide frame 27.
Since it is close to the guide frame 27 as a tilt stop surface, it does not contact the guide frame 27 before the open / close plate, and the open / close plate does not largely tilt, and the corners of the open / close plate do not bite directly into the guide frame 27. Therefore, the opening / closing plate can be opened / closed with one hand at any time, and wear powder from the guide frame 27 is not generated, which causes the abrasion powder on the weighing pan 33 to cause a measurement error.

The cushioning member 38 has a U-shaped cross section or a simple plate-like structure, but has a cushioning function with the front plate 30 and a tilting preventing function for the open / close plate. Moreover, by utilizing the elasticity of the U-shaped connecting portion 383 which serves as a buffer portion,
Since it is attached to the opening / closing plate, it is not necessary to provide a separate attaching means.

According to the second aspect of the invention, the cushioning member 38 sandwiched at the front end of the upper plate 28 has stepped portions at both ends thereof. Since the wall surface 385 serving as the sliding guide surface comes into contact with the guide frame 27 before the side surface of the top plate 28, the top plate 2
8 is guided by the wall surface 385 and slides smoothly. Therefore, the upper surface plate 28 does not come into contact with the guide frame 27 at all, and there is no fear that abrasion powder is generated from the guide frame 27. Further, as a means for preventing the top plate 28 from tilting,
An intruding portion 384 that comes into contact with the guide groove 34 is provided, and operates similarly to the first aspect of the invention.

According to the third aspect of the invention, since the plate-shaped cushioning member 38 is arranged on the opening / closing plates 28, 29a, 29b forming one surface of the windshield case so as to protrude from the front edge of the opening / closing plate, The front surface does not directly contact the front plate 30. Further, since the cushioning member 38 is close to the guide frame 27 even if the opening / closing plates 28, 29a, 29b move rearward,
The opening / closing plate is brought into contact with the guide frame 27 prior to the opening / closing plate, so that the opening / closing plate can be closed with one hand without generating a large static friction force without being greatly tilted. Further, since the corners of the opening / closing plate do not bite into the guide frame, abrasion powder of the guide frame does not occur. In particular, since the cushioning member is plate-shaped and has a simple structure, it is easy to manufacture, and it is relatively easy to align and attach it to the front edge of the opening / closing plate.

Further, according to the invention of claim 4, the opening / closing plate 2
Handle 38 for moving 8, 29a, 29b in the front-back direction
Since 7 can be molded integrally with the buffer member 38, the number of parts does not increase, and there is no waste in the manufacturing process. Also, handle 387
Also serves as a grip for the cushioning member 38, which has the advantage of facilitating the positioning and attachment work to the opening / closing plate.

[0067]

[Brief description of drawings]

FIG. 1 is a perspective view of an electronic scale showing a state in which a top plate and a front plate are assembled.

FIG. 2 is a central longitudinal sectional view of the electronic scale.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view of the electronic scale.

5 is an enlarged cross-sectional view of a main part of FIG.

FIG. 6 is an enlarged sectional view of a partly omitted main part showing another embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a partly omitted main part showing still another embodiment of the present invention.

FIG. 8 is a side view showing a conventional example of an electronic scale.

FIG. 9 is a side view showing a state where a side plate of an electronic balance of a conventional example is opened.

FIG. 10 is an enlarged cross-sectional view of a main part of a conventional example.

[Explanation of symbols]

 20 Electronic Scale Main Body 24 Windshield Case 27 Guide Frame 28 Top Plate 30 Front Plate 33 Weighing Dish 34 Guide Groove 37 Weighing Chamber 38 Cushioning Member 384 Entry 385 Wall 386 Step 387 Handle

Claims (4)

[Claims] 1. A windshield case 24 having a square outer shape that forms a weighing chamber 37, and an opening / closing plate that constitutes one surface of the windshield case 24 is moved back and forth along a guide groove 34 of a horizontally supported guide frame 27. The front plate 30 of the windshield case 24 that moves
In the electronic scale with a windshield, which contacts the windshield case, a cushioning member 38 having a U-shaped cross section is sandwiched at the front end of the opening / closing plate, and the cushioning member 38 is brought close to the guide frame 27. . 2. The opening / closing plate according to claim 1 is an upper surface plate 28 constituting an upper surface of the windshield case 24, and step portions 386 are formed at both ends of a cushioning member 38 sandwiched at a front end of the upper surface plate 28. However, the stepped portion 386 is inserted into the guide groove 34.
The electronic scale with a windshield according to claim 1, wherein the electronic scale has a wall surface 385 that is close to the guide frame 27. 3. A windshield case 24 having a rectangular outer shape forming a weighing chamber 37 is provided, and an opening / closing plate constituting one surface of the windshield case 24 is moved back and forth along a guide groove 34 of a horizontally supported guide frame 27. In the electronic scale with a windshield case that abuts on the front plate 30 of the windshield case 24, the plate-shaped cushioning member 38 is arranged on the opening / closing plate so as to protrude from the front edge of the opening / closing plate and is close to the guide frame 27. An electronic scale with a windshield that is characterized by 4. An electronic scale with a windshield according to claim 1, wherein a handle 387 is provided integrally with the buffer member 38.