JPH0334378Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention relates to a vehicle for transporting products such as vegetables, fish, and meat used in supermarkets, restaurants, etc.

(Prior art) The present inventor wrote in Utility Model Publication No. 54-17945,
Front, rear, left and right tubular struts b with rolling wheels a mounted on the lower ends
Then, the mantle portions (d) disposed at the four corners of the plurality of shelf boards c are fitted, and spacer tubes e are interposed between the mantle parts d of the vertically adjacent shelf boards c. and the said support b
We proposed a transport vehicle with a cap fitted on the top end. (See Figures 10 and 11) (Problems to be solved by the invention) In workplaces of supermarkets and restaurants, the transport vehicle is frequently taken in and out of refrigerators and freezers. At this time, there is a large temperature difference between the refrigerator or freezer and the workplace.

In order to prevent the worker who handles the transport vehicle from feeling cold and to reduce the weight of the transport vehicle, the shelf board and the spacing tube are made of synthetic resin.

However, since synthetic resin has low strength, it is necessary to make the tubular support made of metal to reinforce the shelf board and the spacing tube.

However, since metals and synthetic resins have significantly different expansion coefficients, the degree of expansion and contraction of the two differs when the transport vehicle is placed in and out of a refrigerator or freezer. A gap t is created between the upper shelf c and the sleeve part d due to contraction,
The transport vehicle becomes loose. (See Figure 13) (Means for solving the problem) The present invention was proposed with the aim of solving the above problem. The mantle portions disposed at the four corners of the plurality of synthetic resin shelf boards are fitted to the metal supports, and synthetic resin spacing tubes are provided between the mantle parts of the vertically adjacent shelf boards. A conveyor in which a bolt inserted through an elastic cap fitted in the mantle of the uppermost shelf plate is screwed into a nut held in a nut holder interposed and fitted to the upper end of the support. In the car, a coil spring-like cushion material made of an elastic metal wire wound into a cylindrical shape is interposed between the mantle tube part of the uppermost shelf board and the uppermost spacer tube. That is.

(Function) Since the transport vehicle according to the present invention is configured as described above, when it is in a hot workplace, the synthetic resin part expands more than the metal support.
A coil spring-like cushion material, which is made by winding an elastic metal wire into a cylindrical shape and is interposed between the mantle of the uppermost shelf and the uppermost spacing tube, is compressed between them and becomes elastic. to absorb the difference in expansion between the synthetic resin part and the metal support.

Furthermore, when the transport vehicle is in a freezer or refrigerator, the synthetic resin part contracts more than the metal support, but as the coil spring-shaped cushion material elastically restores and expands, the synthetic resin Accommodates shrinkage differences between the part and the metal post.

As described above, according to the present invention, an extensible coil spring-shaped cushion material is interposed between the mantle portion of the uppermost synthetic resin shelf board and the uppermost synthetic resin spacing tube in the transport vehicle. In particular, it is possible to absorb the difference in expansion and contraction that occurs between the synthetic resin part and the metal support of the transport vehicle, thereby preventing the transport vehicle from rattling or loosening.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes a tubular metal column on the front, rear, left and right sides on which a rolling wheel 2 at the lower end is mounted, and a mantle tube part 4 arranged at the four corners of a plurality of synthetic resin shelf boards 3 is fitted into each column 1. is,
A spacer tube 5 made of synthetic resin is fitted onto the support 1 between the mantle portions 4 of the vertically adjacent shelf boards 3. In the figure, 5' indicates the tube part 4 of the lowest shelf board 3 and the support column 1.
This is a synthetic resin spacing tube fitted into the support column 1 between the mounting frame piece 6 of the roller wheel 2 attached to the lower end of the column.

Furthermore, a coil spring-shaped cushion member 7 made of a steel wire wound into a cylindrical shape is fitted onto the support 1 between the sleeve portion 4 of the uppermost shelf board 3 and the uppermost spacing tube 5. ing.

A nut holder 8 is fitted into the upper end of the pillar 1, and a locking tongue piece 10 cut and raised from the pillar 1 is engaged with an annular recess 9 provided on the outer peripheral surface of the holder 8. A nut holder 8 is fixed to 1.

A square nut 12 is installed in a vertical hole 11 provided along the axial direction of the nut holder 8, and an elastic nut made of synthetic resin, rubber, etc. is fitted into the sleeve 4 of the uppermost shelf board 3. A tightening adjustment bolt 14 loosely inserted into the cap 13 is screwed into the nut 12.

FIG. 6 shows details of the nut holder 8, in which a horizontal square hole 15 communicating with the vertical hole 11 is bored in the side surface of the holder, and a square nut 12 is inserted into the holder through the square hole 15. It's summery.
Further, a flange piece 16 is provided at the upper end of the nut holder 8 to be engaged with the upper end edge of the support column 1.

The illustrated embodiment is configured as described above, so that when the transport vehicle is in a hot workplace, the synthetic resin spacing tube 5 and the mantle portion 4 of the shelf board 3 are When it expands significantly, the coil spring-like cushion material 7 is compressed between the sleeve 4 of the uppermost shelf board 3 and the uppermost spacing tube 5, and becomes elastic as shown in FIG. shrinks to
It absorbs the difference in expansion between the metal support 1, the synthetic resin spacing tube 5, and the synthetic resin shelf board 3.

In addition, when the transport vehicle is inside a refrigerator or freezer and the synthetic resin spacer tube 5 and the synthetic resin shelf board 3 contract significantly more than the tubular metal support 1, the coil spring-shaped cushion material that has contracted 7 has its compressive force released or reduced, and restores and expands due to elastic repulsive force as shown in FIG.
It absorbs the shrinkage difference between

If any looseness occurs between the assembly parts of the transport vehicle during use, the tightening adjustment bolt 14 is tightened and adjusted to remove the looseness.

In this way, according to the embodiment, the steel wire is formed into a cylindrical shape between the sleeve portion 4 of the uppermost synthetic resin shelf plate 3 and the uppermost synthetic resin spacing tube 5 in the transport vehicle. A coil spring-shaped cushion material 7 is fitted onto the tubular metal support 1, and the cushion material 7 absorbs the expansion and contraction differences that occur between the synthetic resin part and the metal support in the transport vehicle. It can be absorbed and prevent rattling and loosening of the transport vehicle.

[Brief explanation of the drawing]

Fig. 1 is a slope view showing an embodiment of the carrier vehicle according to the present invention, Fig. 2 is a front view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a partial slope view thereof, and Fig. 5 is a Figure 6 is an exploded perspective view of the part shown in the figure, Figure 6 is a slope view of the nut holder, Figures 7 and 8 are enlarged longitudinal cross-sectional views showing the cushion material when it is expanded and contracted, respectively, and Figure 9 is the cushion material. , FIG. 10 is a slope view of a conventional transport vehicle, FIG. 11 is a front view thereof, FIG. 12 is a partially enlarged vertical sectional view thereof, and FIG. 13 is a state of the portion shown in FIG. 12 when contracted. FIG. 1...Metal support, 2...Rolling wheels, 3...Shelf board,
4... sleeve tube section, 5... spacing tube, 7... coil spring shaped cushion material.

Claims (1)

[Scope of utility model registration request] The sleeves arranged at the four corners of the plurality of synthetic resin shelf boards are fitted into the front, rear, left and right tubular metal supports with rolling wheels mounted on the lower ends, and the above-mentioned shelf boards adjacent to each other above and below are fitted. A synthetic resin spacing tube is interposed between each of the cannula parts, and an elastic tube fitted in the cannula part of the uppermost shelf is attached to a nut held in a nut holder fitted to the upper end of the column. A coil spring-like coil spring made by winding an elastic metal wire into a cylindrical shape between the mantle of the upper shelf plate and the uppermost spacing tube is used in a transport vehicle that is screwed with a bolt inserted through the cap. A transport vehicle characterized by being made of a cushion material.