JP2002081850A - Showcase - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the easy movement on a floor surface without employing any castor and reduce the number of parts, further, permit the reception of a cooling device in a small space, and prevent the generation of damage, such as recesses and scratches or the like of a floor, even when a showcase is installed for a long period of time. SOLUTION: The showcase 1 is constituted of a compressor 11, a condenser 13 and the like, which are installed in a machine room 3 formed in the lower part of a main body 2, angles 4, 4 attached to the lower part of the main body, a unit base 9, supported by the angles to which the compressor and the condenser are attached, and projected parts 7, 7, which are projected downward from the unit base 9 and abutted against the floor F.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a showcase in which a compressor, a condenser and the like are installed in a machine room formed at a lower portion of a main body.

[0002]

2. Description of the Related Art Conventionally, a showcase of this type, especially a low-temperature showcase, has a machine room formed in a lower portion of a main body and a cooling device is formed in the machine room as shown in, for example, Japanese Patent Application Laid-Open No. 9-229544. Machine and condenser were installed.

FIG. 12 is an enlarged vertical sectional side view of a machine room 103 of a conventional low-temperature showcase 101. As shown in FIG. The main body 102 of the low-temperature showcase 101 is constituted by a heat insulating wall (not shown), and a machine room 103 is provided below the heat insulating wall.
Are formed. Main body angles 104, 104 are fixed to both sides of the lower edge of the low-temperature showcase 101 at both sides of the bottom of the machine room 103.

At the front and rear of each of the main body angles 104, casters 108 are attached at four places and abut against the floor. Furthermore, this body angle 10
4, 104, the unit base 109 is mounted on the left and right. On the unit base 109, a compressor 11 constituting a cooling device for the low-temperature showcase 101 is provided.
1 is fixed via a mounting base 112, and a condenser 113 and a condenser fan 114 which also constitute a cooling device.
Etc. are attached and fixed. Further, at the front and rear corners of the unit base 109, a separate base caster 12 is provided.
.. Are attached at four places, and the unit base 109 is attached.
I support.

A cushion rubber 116 and a coil spring 117 are interposed between the mounting base 112 and the unit base 109, and a bolt 118 whose lower end is screwed to the unit base 109 is inserted into the cushion rubber 116 and the coil spring 117.

FIG. 13 is an enlarged view of a mounting portion of base casters 120... Mounted on the unit base 109. Base casters 120 ・ ・ ・
A plurality of small-diameter bearings 120B are annularly arranged to support a spherical wheel 120A. A caster mounting plate 123 welded to a rectangular mounting hole 122 provided in a unit base 109 has a screw 124 Screwed.

[0007] The compressor 111 and the condenser fan 1
At the time of maintenance of 14, first, the main body angle 10
After removing the screws (not shown) fixing the unit base 109 to the bases 4 and 104, the floor F surface is moved by the casters 120 for the base supporting the unit base 109. As a result, the entire unit base 109 is pulled out from the machine room 103 to the front, and repair work such as replacement of the compressor 111 and the condenser fan 114 is performed.

[0008]

However, the load resistance is substantially determined by the diameter of the wheels 120A of the base casters 120..., So that in the low-temperature showcase 101 using a large-sized cooling device, it is inevitable. Large casters 120... Will be used. Therefore, it is necessary to secure a larger distance between the unit base 109 and the floor than the diameter of the wheels 120A of the base casters 120... A caster mounting plate 123 having a surface protruding above the surface of the base 109 is provided.
... was screwed.

In such a structure, the unit base 10
In addition to the caster mounting plate 123, the caster mounting plate 123 is particularly required, so that the number of parts is increased, and welding and screwing work are also required. Further, since the caster mounting plate 123 protrudes upward, the caster mounting plate 12
Since the compressor 111 and the condenser 113 cannot be placed directly above the base 3 and the base casters 120 are attached by floating the compressor 111 via the mounting base 112, the number of parts further increases. Was increasing.

As another means, the caster mounting plate 12
When the means for disposing the compressor 111 at a position shifted from the position 3 is required, a larger arrangement area is required, which has been a cause of an increase in the size of the cooling device. Furthermore, since the base casters 120 are in point contact with the floor F, if they are installed on the resin floor F used in recent stores for a long period of time, they may cause damage such as dents and scratches. Had become.

When the compressor 111 is operated, its vibration is transmitted to the mounting base 112 and partially attenuated by the cushion rubber 116 and the coil spring 117, but is transmitted to the unit base 109.
Vibration transmitted to the base caster 120 as it is
, Resonance occurred on the floor, and noise of 70 dB or more was generated when the compressor 111 was started, and 65 dB or more was sometimes generated during operation.

Further, after installation, there is almost no opportunity to move the unit base 109 except during maintenance, and there is almost no need to use the base casters 120... The expensive casters for base 120... Were particularly used.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional technical problem. By providing a projection in contact with the floor instead of a caster, the caster is unnecessary and the number of parts can be reduced. In addition, it is possible to eliminate the need for welding and screwing work, and to eliminate the need for a caster mounting plate protruding above the unit base, thereby enabling the cooling device to be housed in a small space. . In addition, by making the protruding portion projecting downward from the unit base abut against the floor, it is possible to prevent damage such as dents and scratches even when the unit is installed for a long period of time, and to prevent the compressor from being damaged. An object of the present invention is to provide a showcase that can effectively reduce the noise level during driving.

[0014]

According to a first aspect of the present invention, there is provided a showcase in which a compressor, a condenser, and the like are installed in a machine room formed in a lower portion of a main body. , A unit base supported by the angle and to which the compressor and the condenser are mounted, and a projecting portion projecting downward from the unit base and in contact with the floor.

According to the first aspect of the present invention, since the projection protruding downward from the unit base and contacting the floor is provided,
Casters are not required, and the number of parts is reduced. In addition, since it does not protrude above the unit base, the machine room can be effectively used.

According to a second aspect of the present invention, in the first aspect, the projecting portion is formed integrally with the unit base.

According to the second aspect of the present invention, in addition to the first aspect, since the projecting portion is formed integrally with the unit base, the number of parts is reduced.

A third aspect of the present invention is the showcase according to the first or second aspect, wherein an adjuster bolt is provided at a front portion of the unit base.

According to the third aspect of the present invention, in addition to the first or second aspect, the adjuster bolt is provided at the front of the unit base, so that the horizontal adjustment of the unit base during or after the installation of the showcase is smooth. Will be able to do it.

A showcase according to a fourth aspect of the present invention is the showcase according to any one of the first to third aspects, wherein a member having a small frictional resistance is provided below the protrusion.

According to the fourth aspect of the present invention, in addition to the first to third aspects, since a member having a small frictional resistance is provided below the protruding portion, the floor surface can be easily moved. In some cases, the operation of pulling out the unit base from the machine room can be performed very easily.

According to a fifth aspect of the present invention, there is provided a showcase according to any one of the first to third aspects, wherein a vibration damping material is provided below the projecting portion.

According to the fifth aspect of the present invention, in addition to the first to third aspects, a vibration damping material is provided at a lower portion of the projecting portion.
During the cooling operation, the vibration from the compressor, which is transmitted from the unit base to the floor via the protruding portion, can be absorbed and reduced by the damping material, and the noise prevention effect can be effectively improved. It becomes possible. In particular, since the vibration damping material effectively absorbs the impact at the time of starting the compressor, the starting sound of the showcase can be effectively reduced.

According to a sixth aspect of the present invention, in addition to the first to third aspects, a vibration damping material or a vibration damping material is provided below the projecting portion, and the lower side of the vibration damping material or the vibration damping material is provided. Is provided with a member having a small frictional resistance.

According to the sixth aspect of the present invention, in addition to the first to third aspects, a vibration damping material or a vibration damping material is provided below the projecting portion, so that the projecting portion is separated from the unit base during the cooling operation. The vibration transmitted from the compressor to the floor via the floor can be reduced, and the noise prevention effect can be improved. In addition, since a member having low frictional resistance is provided below the vibration damping material or the vibration damping material, the floor surface can be easily moved, so that the work of pulling the unit base out of the machine room during maintenance or the like is extremely difficult. It will be easy to do.

[0026]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a low-temperature showcase as a first embodiment of the present invention, FIG. 2 is a vertical side view of the low-temperature showcase, and FIG. 3 is an enlarged vertical side view of a machine room portion below the low-temperature showcase of FIG. FIG. 4 is a plan view of the machine room, FIG.
6 is a front cross-sectional view of the unit base, FIG. 6 is a detailed cross-sectional view of the protruding portion of FIG. 5, FIG. 7 is a detailed side cross-sectional view of the protruding portion of FIG.
FIG. 9 is a detailed side sectional view of the protrusion according to the second embodiment, FIG. 9 is a detailed side cross sectional view of the protrusion according to the third embodiment, and FIG. 10 shows a support member and a unit base provided on the left and right angles. FIG. 11 is a perspective view of a main part showing a unit base mounted on support members provided on the left and right angles.

The low-temperature showcase 1 has a substantially symmetrical front and rear appearance, and has a main body 2 composed of a heat insulating wall 21 having a substantially U-shaped cross section and side plates 22 and 22 attached to both sides thereof. A front partition plate 23A and a rear partition plate 23B are attached to the inside of the front and rear heat insulating walls 21A and 21B with a space therebetween, and the front bottom plate 27A and the rear are spaced apart above the heat insulating wall 21C at the bottom. A bottom plate 27B is attached. A central panel 20 is provided between the rear end of the front bottom plate 27A and the front end of the rear bottom plate 27B. The central panel 20 has a front suction port 20A formed in the upper front part thereof, a rear suction port 20B formed in the upper rear part part thereof, and an upper surface suction port 20C formed on the upper surface thereof. Thereby, the above-mentioned heat insulating wall 21 (the front and rear heat insulating walls 21) is formed.
A, 21B and the bottom heat insulating wall 21C) and the front partition plate 23
A, a portion surrounded by the front bottom plate 27A, the center panel 20, the rear bottom plate 27B, and the rear partition plate 23B forms a substantially "mountain-shaped" duct 24. Also, the front partition plate 23
A, a front storage chamber 26A opening to the upper surface is formed inside the front bottom plate 27A and the central panel 20, and similarly, the rear storage opening to the upper surface inside the rear partition plate 23B, the rear bottom plate 27B, and the central panel 20. A chamber 26B is configured.

Below the central panel 20, a cooling fan 29 is provided.
Is installed below the front bottom plate 27A and the rear bottom plate 27B.
A and a post-cooler 28B are provided respectively. The upper end portions of the front partition plate 23A and the rear partition plate 23B form a front discharge port 31A and a rear discharge port 31B, respectively.

When a compressor 11 described below is operated, a high-temperature refrigerant discharged from the compressor 11 is condensed in a condenser 13 described later, throttled by an expansion valve (not shown), and then cooled by a pre-cooler 28A and a post-cooler. After flowing into the evaporator 28 </ b> B and evaporating to exert a cooling function, the refrigerant is returned to the compressor 11. Pre-cooler 28
The cold air that has exchanged heat with the air A is directed forward in the duct 24 by the cooling fan 29, and then blown up along the front heat insulating wall 21A, and is discharged from the front discharge port 31A to the front suction port 20A.
To the cooling fan 29 through the front suction port 20A.
Flows to Thereby, a cool air curtain is formed at the opening of the front storage room 26A, and a part of the cool air circulates in the front storage room 26A, and the inside of the front storage room 26A is cooled to a predetermined temperature.

Similarly, the cool air which has exchanged heat with the post-cooler 28B is directed rearward in the duct 24 by the cooling fan 29, and is then blown up along the rear insulating wall 21B.
Discharged from the rear discharge port 31B toward the rear suction port 20B,
The air flows from the rear suction port 20B to the cooling fan 29. Thereby, a cool air curtain is formed at the opening of the rear storage room 26B, and a part of the cool air circulates in the rear storage room 26B, and the inside of the rear storage room 26B is cooled to a predetermined temperature.

On the other hand, a machine room 3 is formed in the lower part of the main body 2 below the heat insulating wall 21, and the front surface of the machine room 3 can be opened and closed by a panel 5. On both sides of the lower edge of the main body 2, main body angles 4, 4 formed by bending a steel plate are fixed on both sides of the bottom of the machine room 3. , A left support angle 6 and a right support angle (not shown) are attached.

The first projections 8, 8... Are respectively provided before and after the main body angles 4, 4 and are in contact with the floor F. The first protruding portions 8, 8,... Are formed by push-fitting the body angles 4, 4, and are protruded downward from the body angles 4, 4.

The unit base 9 is placed on the left support angle 6 and the right support angle, and the main body angles 4, 4
Unit base 9 in mounting holes 4A, 4A provided in
The left and right fixing portions 9A, 9A of the front end are fixed by screws 12. The rear end of the unit base 9 is provided with holding portions 6A provided at the rear ends of the left support angle 6 and the right support angle,
6A. On the unit base 9, a compressor 11, a condenser 13, a condenser fan 14, and the like that constitute a cooling device of the low-temperature showcase 1 are mounted and fixed. Reference numeral 19 denotes an accumulator included in the cooling device.

Further, adjuster bolts 38, 38 are attached to the front end of the unit base 9, and
Two second protrusions 7 are provided at two places. The adjuster bolts 38 are screwed from below into a nut (not shown) welded to the lower surface of the unit base 9. The second protruding portions 7, 7 are formed by integral push-molding with the unit base 9 by push-in processing.
From below and is in contact with the floor F.

When the low-temperature showcase 1 is installed with the above configuration, the following operation is performed. First, the adjuster bolts 38 are turned to be separated from the floor F. Then, the floor F is slid and moved to a predetermined installation location while receiving the load of the entire low-temperature showcase 1 by the first projections 8, 8,... Provided on the lower surfaces of the body angles 4, 4,. At this time, the second base provided on the lower surface of the unit base
Of the low-temperature showcase 1 are distributed to the first protrusions 8, 8,... And the second protrusions 7, 7, since the entire load of the unit base 9 is received by the protrusions 7, 7.
It can be smoothly moved to a predetermined installation location.
The adjuster bolts 38, 3
Since the low-temperature showcase 1 is provided, the horizontal adjustment of the unit base 9 during or after the installation of the low-temperature showcase 1 can be performed smoothly.

Next, maintenance of the cooling device at the lower part of the main body of the low-temperature showcase 1 is performed as follows. First, the panel 5 is opened, the screws fixing the unit base 9 to the body angles 4, 4 are removed, and the adjuster bolts 38, 38 are turned away from the floor F. Then, the entire unit base 9 is pulled out from the machine room 3 to perform repair work such as replacement of the compressor 11 and the condenser fan 14. At this time, since the second protrusions 7, 7 provided on the lower surface of the unit base 9 move so as to slide on the floor F while receiving the load of the entire unit base 9, the operation of pulling out from the machine room 3 to the front is extremely required. Easy to do. After the repair work, as shown in FIG. 10, the entire unit base 9 is pushed backward, and then the reverse work is performed (FIG. 10 omits the compressor and the like).

Here, since the second projections 7, 7 which contact the floor F are provided at the rear of the unit base 9 instead of the casters conventionally used, casters are not required, and the number of parts is reduced. Also, welding, screwing work, etc. are unnecessary.
In addition, since the casters are replaced with the second projecting portions 7, 7, there is no longer a portion projecting above the surface on which the compressor 11 is mounted. When the compressor 11 is placed, the compressor 11 and the like can be arranged above the second protrusions 7, 7, so that the compressor 11 can be accommodated in a smaller space, and the efficiency of the machine room 3 can be reduced. Can be used.

In addition, while the casters have been in point contact with the floor F in the past, the second projections 7 and 7 are in contact with the floor F on the surface, so that the contact area with the floor increases, and the caster can be used for a long time. Floor F even at installation
Do not cause damage such as dents and scratches.

After the low-temperature showcase 1 is installed, the floor F
Second protruding portions 7, 7 and adjuster bolt 3 which abut against
8, 38, the load of the entire unit base is supported. As a result, the vibration transmitted from the compressor 11 attached to the unit base 9 to the body angles 4 and 4 can be significantly reduced, and the low-temperature showcase 1 is supplied to the low-temperature showcase 1 when the compressor 11 is started and during operation. Vibration and noise due to the transmission can be effectively reduced.

Next, FIG. 8 shows a second embodiment of the present invention. In this case, a sheet 41 made of, for example, a fluororesin or a high-density polyethylene resin having a small frictional resistance is attached to the lower ends of the second protrusions 7, 7.
Abut. Thereby, the sheet 41 having a small frictional resistance
Can smoothly move the floor F while receiving the load of the entire unit base 9, so that the operation of moving the low-temperature showcase 1 to a predetermined installation location and pulling out the unit base 9 from the machine room 3 can be performed extremely easily.

Incidentally, similarly to this, the adjuster bolt 3
When a sheet having a small frictional resistance is attached to the lower end of each of the floors 8 and 38 (not shown), the sheet comes into contact with the floor F, and the floor can be easily adjusted without turning the adjuster bolts 38 and 38 to separate from the floor F. The F-plane can be moved, and the maintenance work can be made more efficient than in the second embodiment. Further, during the cooling operation, the vibration from the compressor 11 transmitted from the unit base 9 to the floor F via the adjuster bolts 38, 38 can be absorbed and reduced, so that the noise prevention effect is effectively improved. It is possible to do.

Next, FIG. 9 shows a third embodiment of the present invention. In this case, a damping material 42 in which gel-like silicon is solidified is attached to the lower ends of the second protrusions 7, 7, and the above-mentioned sheet 41 having a small frictional resistance is provided below the damping material 42. The sheet 41 is in contact with the floor F. Thereby, the sheet 41 having a small frictional resistance
As a result, the entire load of the unit base 9 is supported, and the floor F can be moved smoothly, and the operation of moving the low-temperature showcase 1 to a predetermined installation location and pulling the unit base 9 out of the machine room 3 is extremely easy. I can do it. In addition, since the vibration damping material 42 has an excellent effect of absorbing shock and vibration,
Absorbs vibration from the compressor 11 transmitted from the unit base 9 to the floor F via the adjuster bolts 38, 38,
It can be reduced. Therefore, the noise prevention effect can be more effectively improved.

In the same manner, the adjuster bolt 3
In the case where a damping material obtained by solidifying gel-like silicon is attached to the lower ends of 8, 38, and a sheet having a small frictional resistance is attached below the damping material (not shown), the sheet is placed on the floor. Since it comes into contact with F, the adjuster bolt 38,
The floor F surface can be easily moved without turning the wheel 38 to separate from the floor F. Therefore, the efficiency of the maintenance work can be further improved as compared with the third embodiment. In addition, the damping material is excellent in absorbing shock and vibration, so that the adjuster bolt 38,
Vibration from the compressor 11 transmitted to the floor F via 38 can be absorbed and reduced. Therefore,
It is possible to more effectively improve the noise prevention effect.

As another embodiment of the present invention, instead of the sheet 41 in the second embodiment, a damping material obtained by solidifying gel silicon is attached, and this damping material is brought into contact with the floor F. Such a thing is mentioned. Since the vibration damping material has an excellent effect of absorbing shock and vibration, the unit base 9
Vibration transmitted from the compressor 11 to the floor F via the adjuster bolts 38 and 38 from the compressor 11 can be absorbed and significantly reduced. Therefore, it is possible to effectively improve the noise prevention effect. Damping material is compressor 1
Since the shock at the time of start-up of the low-temperature showcase 1 is particularly effectively absorbed, the start-up sound of the low-temperature showcase 1 can be effectively reduced. In addition, similarly, the adjuster bolt 3
The same applies to the case where the vibration damping material is attached to the lower ends of 8, 38.

Further, since the damping material obtained by solidifying the gel silicon generally has a small frictional resistance, even if the damping material is in contact with the floor F, the floor F can be smoothly moved while receiving the load of the entire unit base 9. Since it can be moved, the operation of moving the low-temperature showcase 1 to a predetermined installation location and pulling out the unit base 9 from the machine room 3 can be performed extremely easily.

In the above embodiment, the second protrusion 7
Reference numeral 7 is formed by push-fitting integrally with the unit base 9. However, even when another separate member is projected from the unit base 9 by welding or the like to form a projecting portion, the caster becomes unnecessary, and Also, parts for fixing the casters, screwing work, and the like are not required. In addition, there is no portion protruding above the surface on which the compressor 11 is mounted, and the compressor 11 and the like can be disposed above the second protruding portions 7, 7, so that they can be accommodated in a smaller space. And the size of the cooling device can be reduced. In addition, the operation of moving to a predetermined installation location and pulling the device out of the machine room 3 can be performed very easily in the same manner as described above.

[0047]

As described in detail above, according to the first aspect of the present invention, since the projection protruding downward from the unit base and abutting against the floor is provided, casters become unnecessary, and the number of parts is reduced. In addition, since it does not protrude above the unit base, the machine room can be effectively used.

According to the second aspect of the present invention, in addition to the first aspect, since the projecting portion is formed integrally with the unit base, the number of parts is reduced.

According to the third aspect of the present invention, in addition to the first or second aspect, the adjuster bolt is provided at the front of the unit base, so that the horizontal adjustment of the unit base during or after the installation of the showcase is smooth. Will be able to do it.

According to the fourth aspect of the present invention, in addition to the first to third aspects, a member having a small frictional resistance is provided below the protruding portion, so that the floor surface can be easily moved. In some cases, the operation of pulling out the unit base from the machine room can be performed very easily.

According to the fifth aspect of the present invention, in addition to the first to third aspects, a vibration damping material is provided at a lower portion of the projecting portion.
During the cooling operation, the vibration from the compressor, which is transmitted from the unit base to the floor via the protruding portion, can be absorbed and reduced by the damping material, and the noise prevention effect can be effectively improved. It becomes possible. In particular, since the vibration damping material effectively absorbs the impact at the time of starting the compressor, the starting sound of the showcase can be effectively reduced.

According to the sixth aspect of the present invention, in addition to the first to third aspects, a vibration damping material or a vibration damping material is provided below the projecting portion, so that the projecting portion is separated from the unit base during the cooling operation. The vibration transmitted from the compressor to the floor via the floor can be reduced, and the noise prevention effect can be improved. In addition, since a member having low frictional resistance is provided below the vibration damping material or the vibration damping material, the floor surface can be easily moved, so that the work of pulling the unit base out of the machine room during maintenance or the like is extremely difficult. It will be easy to do.

[Brief description of the drawings]

FIG. 1 is a perspective view of a low-temperature showcase as a first embodiment of the present invention.

FIG. 2 is a vertical side view of a low-temperature showcase.

FIG. 3 is an enlarged vertical sectional side view of a machine room portion below a low-temperature showcase in FIG. 2;

FIG. 4 is a plan view of a machine room.

FIG. 5 is a front sectional view of a unit base.

FIG. 6 is a detailed sectional view of a protrusion of FIG. 5;

FIG. 7 is a detailed side sectional view of a protrusion of FIG. 5;

FIG. 8 is a detailed side sectional view of a protrusion according to a second embodiment.

FIG. 9 is a detailed side sectional view of a protrusion according to a third embodiment.

FIG. 10 is an essential part perspective view showing support members and unit bases provided on left and right angles (a compressor and the like are omitted).

FIG. 11 is a perspective view of an essential part showing a unit base mounted on support members provided on the left and right angles.

FIG. 12 is an enlarged vertical sectional side view of a machine room portion below a conventional low-temperature showcase.

FIG. 13 is a cross-sectional view showing a caster mounting main part in a conventional low-temperature showcase.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-temperature showcase 2 Main body 3 Machine room 4 Main body angle 7 2nd protrusion 9 Unit base 11 Compressor 38 Adjuster bolt 41 Seat 42 Vibration damping material

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Atsushi Todoroki 2-5-1-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. F-term (reference) 3B110 AA05 BA04 CA00 CA20 3L045 AA04 AA07 BA01 CA02 DA02 EA01 KA00 PA04

Claims (6)

[Claims] 1. A showcase in which a compressor, a condenser, and the like are installed in a machine room formed at a lower portion of a main body.
An angle attached to a lower portion of the main body, a unit base supported by the angle, to which the compressor and the condenser are attached, and a projection projecting downward from the unit base and abutting on the floor. Showcase that features. 2. The showcase according to claim 1, wherein the protrusion is formed integrally with a unit base. 3. The showcase according to claim 1, wherein an adjuster bolt is provided at a front portion of the unit base. 4. The showcase according to claim 1, wherein a member having a small frictional resistance is provided below the protruding portion. 5. The showcase according to claim 1, wherein a damping material is provided below the projecting portion. 6. A vibration damping material or a vibration damping material is provided below the projecting portion, and a member having a small frictional resistance is provided below the vibration damping material or the vibration damping material. Item 3 showcase.