JPH0813286B2 - wagon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a wagon preferably used in an office or the like.

[Prior Art] Conventionally, in this type of wagon, a plate-shaped horizontal member is provided between the upper ends of the side plates, the upper surface of which is flush with the upper end surface of the side plate.
A top plate having a flat lower surface is placed on the top plate and fixed by welding or bolts.

That is, in the conventional structure, in order to prevent the horizontal member from projecting downward and narrowing the storage space, the flat member is simply used to function as a bracket for connecting the top plate and the side plate. The top plate itself is responsible for the bonding strength between the upper ends of the side plates.

[Problems to be Solved by the Invention] Recently, there has been a demand for the top plate to be made of a synthetic resin that is easy to manufacture and can be made lightweight, but a structure for joining side plates to the top plate itself. It has a conventional structure that plays a role as an element, and simply replacing the material of the top plate with metal from synthetic resin may result in insufficient strength.

An object of the present invention is to provide a wagon in which the top plate can be reasonably made of synthetic resin without narrowing the storage space or causing insufficient strength.

[Means for Solving the Problems] The present invention employs the following configuration in order to achieve such an object.

That is, the wagon according to the present invention is constructed such that before and after a pair of horizontal rails is erected between the upper ends of the side plates, and a synthetic resin top plate can be attached to the both horizontal rails. , The front and rear cross rails are projected above the upper end surface of the side plate, and recesses for receiving the cross rails are formed in the front and rear rear surfaces of the top plate, respectively. It is inserted in the recess and the horizontal rails and the top plate are fixed together.
The top plate has vertical and horizontal ribs that intersect in a grid pattern on its lower surface, and the ribs located in the front and rear parts are formed with recesses in which the height is lower than the ribs located in the middle part. It is characterized by being

When the strength of the central portion of the top plate is emphasized, it is desirable that the arrangement density of the ribs located in the central portion in the left-right direction is higher than the arrangement density of the ribs of the other portions.

[Operation] With such a configuration, it is possible to form the recesses for receiving the horizontal rails on the front surface of the top plate and the rear portion of the lower surface, respectively, and to project the horizontal rails above the upper end surface of the side plate. Therefore, the horizontal rail can be made thick without protruding the horizontal rail to the storage space side. Therefore, it becomes possible to function as a high-strength structural body, such as by forming the horizontal crosspiece in a channel shape, and the upper ends of the side plates can be firmly coupled to each other by the horizontal crosspiece. Therefore, it is not necessary to use the top plate as a structure for connecting the side plates, and the top plate can be easily made of synthetic resin.

In addition, the top plate has vertical and horizontal ribs that intersect in a grid pattern on the lower surface, and the ribs located at the front and rear parts are made shorter than the ribs located at the middle part so that the recesses are formed. Since it is formed, the intermediate portion that is not supported by the horizontal rail can be made thicker than the portion forming the recess by a dimension corresponding to the thickness dimension of the horizontal rail. It is easy to make it sufficiently strong against the top load.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

This wagon 1, as shown in FIG. 6, has a drawer 2,
The wagon body 5 is provided with a plurality of stages 3 and 4, and the top plate 6 made of synthetic resin can be attached to the upper opening of the wagon body 5.

As shown in FIG. 1, the wagon main body 5 includes left and right side plates 51.
And a back plate 53, and front and rear cross rails 54, 55 are installed between the upper ends of the side plates 51.

The horizontal rail 54, which is installed between the upper ends of the front ends of the side plates 51, has a channel shape that opens downward and is installed above the upper end surface 51j of the side plate 51. Specifically, as shown in FIG. 2, an inwardly bending attachment piece 51e is integrally projectingly provided on the upper end of the reinforcing frame member 51b, and a horizontal rail is provided on the attachment piece 51e.
54 is mounted. The horizontal rail 54 is provided with a through hole 54b having a cut-and-raised piece 54a, and the horizontal rail 54 is positioned by engaging the cut-and-raised piece 54a with an engagement hole formed in the mounting piece 51e. Then, the opening edge of the through hole 54b and the mounting piece 51e are welded together.
It is joined via 54c. A base end portion 58a of an L-shaped reinforcing metal fitting 58 is rigidly attached to the inner surface of the reinforcing frame member 51b.
The tip 58b of the reinforcing metal fitting 58 is fixed to the bottom surface of the mounting piece 51e. Then, this horizontal rail 54 is the upper end surface of the side plate 51.
It is arranged above 51j, and its left and right ends are opened to the side with a gap. Bolt insertion holes 54d for attaching the top plate are formed near both ends of the horizontal rail 54. On the other hand, the horizontal rail 55 provided between the rear ends of the side plates 51 has a channel shape that opens downward, and has an extending piece 55a that extends rearward at the rear edge thereof. Both ends 55t of this horizontal rail 55
Is placed on the inner half of the upper bent piece 51c of the left and right side plates 51, and the extending piece 55a is made to go under the upper bent piece 53a of the back plate 53. . An elastically deformable cut-and-raised piece 55b is integrally engaged with the extension piece 55a, and the cut-and-raised piece 55b and the extension piece 55a elastically move the upper bent piece 53a. The horizontal rail 55 is fixed to the upper bent piece 51c of the side plate 51 via the welded joint 55c in a state of being pressed. The upper bent piece 53a of the back plate 53 is provided with a rectangular positioning hole 53b with which the tip of the cut and raised piece 55b is engaged. By the way, this horizontal rail 55
Are also disposed above the upper end surface 51j of the side plate 51, and the left and right ends 55t of the side plate 51 are entirely opened laterally. Further, in the vicinity of both ends of the horizontal rail 55, a passage hole 55d having a large width and a locking hole having a width smaller than the passage hole 55d are provided.
55e and 55e are formed continuously in the front-rear direction.

As shown in FIGS. 3 and 4, the top plate 6 has an upper plate portion 61.
And the side plate portion 6 hung from both side edges of the lower surface 61a of the upper plate portion 61.
2, and a front plate portion 63 hung from the lower surface front edge of the upper plate portion 61,
A flat one having a back plate portion 64 hung from the rear edge of the lower surface of the upper plate portion 61, and a concave portion 6a for receiving the horizontal rails 54, 55 at the lower front portion and the lower rear portion of the upper plate portion 61, 6b are formed respectively. Specifically, on the lower surface 61a of the upper plate portion 61, reinforcing vertical ribs 65 and horizontal ribs 66 intersecting in a grid pattern are provided, and the vertical ribs 65 and horizontal ribs at the positions where the horizontal bars 54, 55 are located. The recesses 6a and 6b are formed by making the rib 66 shorter than the vertical rib 65 and the horizontal rib 66 located in the middle. The vertical ribs 65 located in the central portion in the left-right direction are arranged at a narrower interval than the vertical ribs 65 on the left and right sides to increase the arrangement density.

Further, screw holes 67 and 68 are provided in the recesses 6a and 6b at positions corresponding to the bolt insertion holes 54d and the locking holes 55e, respectively, and the screw holes 68 provided at the rear portion of the lower surface of the top plate 6 are provided.
The pin 8 is fastened to it. As shown in FIG. 5, the pin 8 includes a screw portion 8a screwed into the screw hole 68, a shaft portion 8b having a diameter larger than the screw portion 8a and slightly smaller than the locking hole 55e, and the shaft portion 8a.
It has a stepped bolt shape having a head portion 8c having a diameter larger than b and smaller than the passage hole 55d, and the axial dimension of the shaft portion 8b corresponds to the thickness of the horizontal rail 55 on the rear side.

Then, the horizontal rails 54 and 55 are inserted into the recesses 6a and 6b of the top plate 6, respectively, and the head portion 8c of the pin 8 is inserted into the passage hole 55d as shown in FIG. 8b is locking hole 55e
When the top plate 6 is moved forward until it comes into contact with the front edge of the top, the head 8c of the pin 8 is brought into contact with the lower surface side opening end face 55f of the locking hole 55e, and the top plate 6 moves upward and laterally. Is prohibited. In this state, from the lower surface side of the horizontal bar 54 on the front side, the bolt insertion hole 54
A bolt 9 is inserted through d, and the bolt 9 is screwed into the screw hole 67 to fix the front portion of the top plate 6 to the horizontal rail 54.

According to this structure, since the horizontal rails 54, 55 are projected upward from the upper end surface 51j of the side plate 51, the wagon storage space is not narrowed by the horizontal rails 54, 55. Moreover, since the horizontal rails 54, 55 can be effectively accommodated in the recesses 6a, 6b provided in the lower front surface and the lower rear surface of the top plate 6, the side rails 54, 55 having a channel-like thickness can be used. The upper ends of 51 can be firmly joined together. Therefore, since it is not necessary for the top plate 6 to play a role as a structural element for connecting the side plates, the top plate 6 can be made of synthetic resin without difficulty. When the top plate 6 is made of synthetic resin, it can be easily manufactured and is lightweight, so that the cost can be reduced and the manufacturing efficiency and the usability can be effectively improved.

In addition, a plurality of vertical ribs 65 and horizontal ribs 66 intersecting in a grid pattern are arranged on the lower surface 61a of the top plate 6, and the vertical ribs 65 and horizontal ribs 66 located at the front and rear portions are provided at the vertical portions located at the middle portion. If the recesses 6a and 6b are formed so as to be lower than the ribs 65 and the horizontal ribs 66, the top plate 6 can be made lighter without lowering the strength. If you do this, the horizontal rails 54, 55
In the intermediate portion which is not supported by the vertical ribs 65 and the horizontal ribs 66, the height of the vertical ribs 65 and the horizontal ribs 66 can be increased by a dimension corresponding to the thickness dimension of the horizontal rails 54 and 55, so that the intermediate portions do not have insufficient strength.

Since the vertical ribs 65 and the horizontal ribs 66 are arranged in a lattice pattern on the lower surface 61a of the top plate 6, and the arrangement density of the vertical ribs 65 located in the central portion in the left-right direction is made higher than the other portions, The strength of the central portion of the top plate 6 can be effectively increased, and the strength is sufficiently high against the top load.

This wagon body is not only used as a moving wagon with casters, but can also be used as a side desk with an adjuster attached, or as a sleeve suspended under the top plate of the desk. Of course, you can also do it.

[Effects of the Invention] As described in detail above, according to the wagon of the present invention,
The top plate can be reasonably made of synthetic resin without narrowing the storage space or insufficiency of strength, so that the cost can be reduced and the manufacturing efficiency and usability can be effectively improved. You can

In addition, a plurality of ribs are arranged in a grid pattern on the lower surface of the top plate, and the top plate is supported by a horizontal rail installed between the upper ends of the side plates. The top plate can be reasonably reduced in weight while ensuring strength.

Furthermore, since a plurality of ribs are arranged on the lower surface of the top plate in a grid pattern and the density of the ribs located in the central portion in the left-right direction is set higher than the other portions, the center of the top plate is affected by the top load. It is possible to effectively prevent unreasonable stress from acting on the portion, and it is possible to effectively prevent reduction in strength while achieving weight reduction.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view, FIG. 2 is a perspective view showing a mounting portion of a horizontal rail, FIG. 3 is a bottom view of a top plate, and FIG. FIG. 5 is a schematic side cross-sectional view, FIG. 5 is an explanatory view showing a mounting mode of the top plate, and FIG. 6 is an overall perspective view. 1 ... Wagon, 6 ... Top plate 6a, 6b ... Recess, 51 ... Side plate 51j ... Top face, 54, 55 ... Horizontal bar 61a ... Bottom surface, 65 ... Vertical rib 66 ... Horizontal rib

Claims (2)

[Claims] 1. A wagon constructed such that front and rear cross rails are erected between the upper ends of the side plates and a top plate made of synthetic resin can be attached to both of the cross rails. The rear rungs are projected above the upper end surface of the side plate, and recesses for receiving the rungs are formed in the front part and the rear part of the lower surface of the top plate, and the rungs are inserted into the recesses. Each of these horizontal rails and the top plate are fixed to each other, and the top plate has vertical and horizontal ribs intersecting in a grid pattern on its lower surface. A wagon characterized by forming a recess that is shorter than the rib located at. 2. The wagon according to claim 1, wherein the arrangement density of the ribs located in the central portion in the left-right direction is higher than the arrangement density of the ribs in other portions.