JP7617620B2 - Workbench - Google Patents

Description

The present invention relates to a workbench with a height adjustable platform.

Patent Document 1 describes a workbench that can provide two different working height levels.
This workbench comprises a base having a support pillar at each of the four corners and the four supports connected by connecting members, and a step with legs inserted inside the four supports of the base at the four corners of the footboard so that they can move freely up and down. Between the supports of the base and the legs of the step, there is a contraction means which enables the four legs to be inserted up to the lower parts of the four supports in a first position in which the four legs of the step correspond to the four supports of the base, and an extension means which enables the lower parts of the four legs to be held inserted in the upper parts of the corresponding four supports in a second position in which the step is detached upward from the base and rotated horizontally from the first position (Claim 1).

Patent No. 6617234

In the above-mentioned conventional technology, two working heights can be achieved by switching the platform between a first position and a second position, but the base requires four posts and the footboard requires four legs, and the four legs of the platform must correspond to the four posts of the base and the lower parts of the four legs must be inserted and held in place in the upper parts of the corresponding four posts, resulting in a complex structure and making it difficult to make the posts strong.

SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a workbench that can solve the problems of the prior art.
To provide a workbench capable of changing the height of the top surface by using a support pole upside down.

The specific means for solving the problem in this invention is characterized by having three or more mutually connected supports 3, a platform 5 having support hole 4 that fits into each support 3, and a first stopper portion 7 that stops the platform 5 at a position a short distance from one end of the support 3 when the support 3 is fitted with the platform 5, and a second stopper portion 8 that stops the support 3 at a position a long distance from the other end of the support 3 when the support 3 is turned upside down and the platform 5 is fitted.

According to the present invention, the height of the platform 5 fitted to the support 3 can be made different from the height of the platform 5 fitted to the support 3 by inverting the support 3 upside down.

FIG. 1 is a perspective view illustrating an embodiment of the present invention. This is a front view of the platform in a high position. This is an exploded side view of the platform in the high position. This is a plan view of the platform in a high position. FIG. FIG. This is a plan view of the ceiling. This is a side view of the ceiling. This is a front view of the platform in a low position. This is an exploded side view of the platform in a low position. This is a front view of a work platform with a low platform being added to a work platform with a high platform. This is an exploded front view of a work platform with a low platform being added to a work platform with a high platform.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1, 9 and 10 show an embodiment in which a work platform 1 with a low platform position L is added to a work platform 1 with a high platform position H.
In Figures 1 to 6, the workbench 1 in the high platform position H has two support pillars 3 fixed to both ends of a connecting rod 9, which cross in the center and are rotatably connected via a vertical axis 10 to form four support pillars 3 connected to each other and arranged in a square, and a rectangular platform 5 is fitted onto these four support pillars 3.

Each of the pillars 3 is made of a pipe or solid rod, and has rubber or synthetic resin grounding members 13 attached to the upper and lower ends. Two arc-shaped metal pieces 16 are fixed to the middle of the upper and lower parts of each pillar 3 by rivets, welding, etc., so that the upper end of the upper metal piece 16a in Fig. 1 forms the first stopper portion 7, and the lower end of the lower metal piece 16b forms the second stopper portion 8.
In addition, the two arc-shaped metal pieces 16 may be one piece, or both ends of one metal piece 16 may form the first stopper portion 7 and the second stopper portion 8 .

The connecting rod 9 is formed of a single strip 9a connecting two of the four pillars 3, and a long, thin rod 9b is used to sandwich the strip 9a from above and below connecting the other two, with both ends of the upper and lower long, thin rods 9b connected by connecting members 9c.
The vertical axis 10 passes through the longitudinal center of the band plate 9a and the vertically elongated rods 9b, and the four supports 3 can be unfolded and folded from a square arrangement.

The elongated rod 9b is provided with a stopper 12 near the vertical axis 10. The stopper 12 is a metal plate with a V-shaped or L-shaped cross section, with one side of the stopper fixed to the elongated rod 9b and the other side of the stopper capable of contacting the band plate 9a when the support is deployed. When the support is deployed and the stopper 12 contacts the band plate 9a, the two connecting rods 9 (9a, 9b) are perpendicular to each other, and the four support columns 3 are deployed in a regular square.

The top plate 5 is formed by connecting the ends of two wide materials 5a with narrow materials 5b to form a square frame, and fixing a base plate 5c to the inside of the square frame to form a square base. The wide materials 5a, narrow materials 5b and base plate 5c are made of square pipe material, square bar material, channel steel, etc.
A pipe 14 passes through each of both ends of the wide material 5a in the vertical direction, and the inside of the pipe 14 forms a support hole 4 into which the support 3 is fitted.

The upper end of the pipe 14 is approximately flush with the upper surface of the wide material 5a, and the lower part protrudes downward from the wide material 5a so that it can abut against the first stopper portion 7 or the second stopper portion 8 when fitted into the support 3.
The length of this pipe 14 is longer than the distance from one end of the support 3 to the first stopper portion 7, approximately twice as long, and the pipe 14 is long enough to fit over the lower end of the support 3 to be added from above when it is fitted into the upper part of the support 3 and abuts against the first stopper portion 7.

At least one (two in the embodiment) of the pipes 14 at the four corners of the top platform 5 is screwed with an anti-sway knob 15. This anti-sway knob 15 presses against the support 3 to which the pipe 14 is fitted, thereby preventing the top platform 5 from vibrating.
The workbench 1 is formed by two supports 3 fixed to both ends of a strip 9a and two supports 3 fixed to both ends of an elongated bar 9b, the strip 9a is inserted into the gap between the two elongated bars 9b to cross them, and a vertical shaft 10 is passed through the intersection to connect them, and assembled in the folded state shown in Figures 5A and 5B. When unfolded from this folded state and the four supports 3 are arranged in a square, the upper ends of the four supports 3 face the pipes 14 at the four corners of the top platform 5, and the support holes 4 at the four corners of the top platform 5 can fit into the supports 3.

In the lower diagram of Figure 1, and in Figures 2 and 3, the first stopper portion 7 of the support pillar 3 is higher than the second stopper portion 8, so that when the top platform 5 is fitted and the lower end of the pipe 14 abuts against the first stopper portion 7, the top platform 5 becomes higher than the upper end of the support pillar 3, and the workbench 1 is in the top platform high position H.
In the upper view of Figure 1, and in Figures 7 and 8, the support pillar 3 is inverted upside down so that the second stopper portion 8 is higher than the first stopper portion 7, and when the top platform 5 is fitted and the lower end of the pipe 14 abuts against the second stopper portion 8, the top platform 5 becomes lower than the upper end of the support pillar 3 (the lower end before inversion), and the workbench 1 is in the low top platform position L.

The lower half of the pipe 14 of the workbench 1 in the high platform position H is fitted onto the upper end of the support 3, and the support hole 4 remains open in the upper half of the pipe 14, into which the lower end (upper end before inversion) of the support 3 of the workbench 1 in the low platform position L can be inserted (as shown in Figures 1, 9, and 10). Also, the lower end of the support 3 of another workbench 1 in the high platform position H can be inserted into the support hole 4 of the workbench 1 in the high platform position H.

In other words, one workbench 1 can be changed to two different positions, a high platform position H and a low platform position L, which differ in the height of the platform 5. If there are two workbenches 1, they can be stacked, allowing four different platform 5 heights to be set.
The top plate 5 can be formed into a rectangle other than a regular square. In that case, the intersection angle of the two connecting rods 9 is set at the stop 12 so that the four supports 3 face the four support holes 4.

The top plate 5 may be triangular, pentagonal, hexagonal, etc., and a support hole 4 may be formed at each corner, a number of supports 3 may be erected facing each support hole 4, the supports may be connected to each other, and a first stopper portion 7 may be formed on each support 3 at a short distance from its upper end, and a second stopper portion 8 may be formed at a long distance from its lower end.
In the above-described embodiment, the system has three or more pillars 3 connected to each other, and a top plate 5 having pillar holes 4 that fit into each of the pillars 3. It is provided with a first stopper portion 7 that stops the top plate 5 at a short distance from one end of the pillar 3 when the pillar 3 is fitted to the top plate 5, and a second stopper portion 8 that stops the pillar 3 at a long distance from the other end of the pillar 3 when the pillar 3 is turned upside down and the top plate 5 is fitted to it.

In addition, in the above embodiment, the system has four pillars 3 connected to each other and arranged in a square, and a rectangular top plate 5 having four pillar holes 4 that fit into the four pillars 3, and is provided with a first stopper portion 7 that stops the top plate 5 at a position a short distance from one end of the pillar 3 when the pillar 3 is fitted to the top plate 5, and a second stopper portion 8 that stops the pillar 3 at a position longer than the short distance from the other end of the pillar 3 when the pillar 3 is turned upside down and the top plate 5 is fitted to it.

With this configuration, the height determined by the first stopper portion 7 of the platform 5 engaged with the four pillars 3 can be made different from the height determined by the second stopper portion 8 of the platform 5 engaged with the pillars 3 by inverting the pillars 3 upside down, thereby enabling the workbench 1 to be placed in a high platform position H or a low platform position L.
In the embodiment, the four support pillars 3 are fixed to both ends of a connecting rod 9 , and the two connecting rods 9 cross in the center and are rotatably connected via a vertical shaft 10 .

With this configuration, the four pillars 3 can be folded up when the top plate 5 is removed.
In the embodiment, one of the two connecting rods 9 is provided with a stopper 12 that abuts against the other rod to set the intersecting angle between them.
With this configuration, when the folded four support columns 3 are unfolded, the four support columns 3 can be properly positioned.

Furthermore, in the above embodiment, the first stopper portion 7 and the second stopper portion 8 are each formed by fixing separate members to the support 3, or by fixing a single member having upper and lower ends to the support 3.
With this configuration, the two stopper portions 7, 8 can be easily configured.
Furthermore, in the embodiment, the support 3 is provided with grounding members 13 at the upper and lower ends for grounding.

This configuration allows the upper and lower ends of the support pillar 3 to be well grounded.
Furthermore, in the above embodiment, the ceiling plate 5 has fixed thereto a pipe 14 whose inside forms the support hole 4, and the length of the pipe 14 is longer than the distance from one end of the support 3 to the first stopper portion 7 and is long enough to fit into the end of the additional support 3.
With this configuration, further work tables 1 can be stacked on top of the work table 1 in the platform high position H.

Furthermore, in the above embodiment, at least one of the pipes 14 is provided with an anti-vibration knob 15 that is pressed against the fitted support 3 to prevent vibration.
This configuration makes it possible to prevent the top platform 5 from swinging relative to the support 3.
The present invention is not limited to the above-described embodiment, and the shape, configuration, and combination of the members can be changed.

For example, the platform 5 can be formed from a single polygonal plate, and if the workbenches 1 are not to be stacked, the pipes 14 can be omitted and only the support holes 4 need to be drilled.
The two connecting rods 9 may be made of strips 9a instead of the elongated rods 9b. Also, the connecting rods 9 may be fixed to each other.

REFERENCE SIGNS LIST 1 workbench 3 support 4 support hole 5 platform 5a wide member 5b narrow member 5c base plate 7 first stopper portion 8 second stopper portion 9 connecting rod 9a band plate 9b rod member 9c connecting member 10 vertical shaft 13 ground contact member 14 pipe 15 anti-swing knob 16 metal piece 16a upper metal piece 16b lower metal piece H platform high position L platform low position

Claims (8)

A workbench having three or more mutually connected support posts (3) and a platform (5) having support post holes (4) that fit into each of the support posts (3), and a first stopper portion (7) that stops the support posts (3) at a position a short distance from one end of the support posts (3) when the platform (5) is fitted to the support posts (3), and a second stopper portion (8) that stops the support posts (3) at a position a long distance from the other end of the support posts (3) when the support posts (3) are turned upside down and the platform (5) is fitted. A workbench having four support posts (3) connected to each other and arranged in a square, and a rectangular platform (5) having four support holes (4) that fit into the four support posts (3), and characterized in that it is provided with a first stopper portion (7) that stops the platform (5) at a position a short distance from one end of the support posts (3) when the platform (5) is fitted into the support posts (3), and a second stopper portion (8) that stops the support posts (3) at a position longer than the short distance from the other end of the support posts (3) when the support posts (3) are turned upside down and the platform (5) is fitted into the workbench. The workbench described in claim 2, characterized in that the four support columns (3) are connected by fixing two support columns (3) to both ends of a connecting rod (9), and the two connecting rods (9) cross each other in the center and are connected rotatably via a vertical shaft (10). A workbench as described in claim 3, characterized in that one of the two connecting rods (9) is provided with a stopper (12) that abuts against the other rod to set the crossing angle between them. The workbench according to any one of claims 1 to 4, characterized in that the first stopper portion (7) and the second stopper portion (8) are formed by fixing separate members to the support (3), or by fixing a single member having upper and lower ends to the support (3). A workbench according to any one of claims 1 to 5, characterized in that the support (3) is provided with grounding members (13) at the top and bottom ends for grounding. The workbench described in any one of claims 1 to 6, characterized in that the top (5) is fixed with a pipe (14) whose inside becomes a support hole (4), and the length of the pipe (14) is longer than the distance from one end of the support (3) to the first stopper part (7) and is long enough to fit onto the end of the support (3) to be added. The workbench described in claim 7, characterized in that at least one of the pipes (14) is provided with an anti-vibration knob (15) that is pressed against the fitted support (3) to prevent vibration.

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