JP6912397B2 - Lifting work table - Google Patents

Description

The present invention relates to a work table including a laboratory table in which the height of the top plate can be arbitrarily raised and lowered by the output of a drive source.

Recently, in desk-shaped furniture that performs various tasks on the top plate such as a table or work table, a patented desk-shaped furniture that can arbitrarily change the height of the top plate at a desired timing by using driving force. It has been proposed by Documents 1 to 5 and is also used for practical use.

Changing the height of the top plate is unfavorable in terms of health because the posture of the worker becomes stiff when the office work performed while sitting on a chair on the top plate of the same height takes a long time. Adjusted the physical disparity due to gender, age, etc. by the height of the chair seat surface, but in small women, etc., the posture became unstable because the legs did not touch the floor or the chair had to be hung shallowly. In consideration of problems such as not only becoming tired easily but also reducing work efficiency, the height of the top plate can be changed arbitrarily by the driving force, so that an appropriate working posture can be taken regardless of the physical disparity. This is because the aim is to change the height of the work surface at an appropriate timing and change the work posture from a sitting posture to a standing posture to change the mood and continue to work in a good atmosphere.

In the conventional desk-shaped furniture in which the height of the top plate can be changed by a driving force, the leg members that support the top plate so as to be able to move up and down have a substantially U-shape, a substantially L-shape, or a substantially inverted T-shape when viewed from the side. Most of them use leg members. This is because the desk-shaped furniture with the top plate that can be raised and lowered is mainly used for offices, and the number of use of the drive system for raising and lowering the top plate is that the raising and lowering parts of the leg members are set to two places on the left and right of the top plate. This is because the purpose is to reduce the number of systems to two, to facilitate the synchronous control of the drive system to be used, or to secure the degree of freedom in designing as a desk-shaped furniture.

However, if a heavy testing machine or measuring machine is placed on the top plate at an angle from the center of the top plate, or if the experimental personnel during work leans against the top plate, an unbalanced load will be applied to the top plate. A lateral load is applied. Such a load is firmly and stably applied to the top plate supported by the leg members such as the substantially L-shaped or substantially inverted T-shaped because the top plate is supported by the cantilever with respect to the leg members. I can't support the board. Therefore, the form in which the top plate is supported by the leg members having a substantially L-shape or a substantially inverted T-shape is not suitable for a work table including a laboratory table.

In view of this point, for a workbench that may be subject to a large knitting load or lateral load, if the top plate is supported by four legs from the lower surfaces of the four corners, the problem caused by the leg members is to distribute and support the load. Therefore, the problem can be reduced.

However, if the top plate of the work table is supported by using four actuators that move up and down independently as leg members, the leg members will tilt when a lateral load is applied to the top plate, which will hinder the raising and lowering operation of the top plate. There is a fear. In order to avoid this, it is conceivable to connect each leg member in the lateral direction to increase the strength of the entire leg member to cope with the lateral load, but another problem arises.

That is, when each leg member is connected in the lateral direction to increase the strength against a lateral load, if there is a deviation (operation error) in the ascending / descending operation between the leg members, the workbench during ascending / descending is distorted and the work is performed. There is a problem that the work surface of the table is tilted or the work surface is distorted, or the safety device is activated and the ascending / descending operation is stopped in the middle.

The above-mentioned operation stop is due to the function of stopping the elevating drive source when the load fluctuation of the safety device built in the actuator used for the leg member is detected. The load fluctuation during the ascending / descending operation of the actuator occurs when the upright leg member (actuator) is tilted by receiving a lateral load, and the sliding resistance during the ascending / descending of the telescopic multiple cylinders constituting the actuator increases.

Japanese Patent No. 4464828 Japanese Patent No. 4319546 Japanese Patent No. 3647911 Japanese Patent No. 3669232 Japanese Patent No. 3034469

According to the present invention, in a work table in which four substantially columnar actuators that expand and contract are arranged as leg members on the lower surfaces of substantially four corners of the top plate and the top plate is supported so as to be able to move up and down, the inclination of the actuators that are the leg members can be suppressed. An object of the present invention is to provide a top plate elevating work table provided with a support structure. The working table in the present invention is a concept including a laboratory table.

The structure of the elevating work table of the present invention made for the purpose of solving the above problems is a work in which four leg members by a substantially columnar actuator that is expanded and contracted by a drive source are arranged on the lower surfaces of substantially four corners of the top plate. The pedestal is provided with a support cylinder that is externally fitted to the leg member in a non-contact manner and a bracket-shaped support that extends laterally from the support cylinder, and the tip portion of the support is provided. It is characterized in that a support structure is installed which is fixed to the lower surface side of the top plate to maintain the outer fitting state of the support cylinder with respect to the leg member and suppress the inclination of the leg member due to a lateral load. Is.
In the present invention, as an embodiment in which the bracket-shaped support is fixed to the lower surface side of the top plate, the support is fixed to either the lower surface of the top plate or the top plate frame, or the lower surface of the top plate and the top plate frame. There is an aspect of fixing to both of the above.

In the support structure, the support cylinder externally fitted to the leg member preferably has a length equal to or slightly smaller than the reduced length of the leg member at the longest, but may be shorter than that. .. For example, it may be about 1/2 of the shortest length of the leg member. If the support cylinder is long, it is possible to prevent the leg member from increasing in inclination while the inclination is small, so that the support cylinder is preferably long.

The gap between the outer surface of the leg member and the inner surface of the support cylinder fitted to the outer surface in the close non-contact state may theoretically be a gap close to 0 mm, but in practice, it includes a processing error and the like, so it is 1.0 mm to The gap may be around 1.5 mm. If the gap is small, the inclination of the leg member can be prevented from expanding at the beginning of the inclination, so it is preferable that the gap is small.

The bracket-shaped support extending laterally from the upper end of the support cylinder is, for example, a plate-shaped substantially inverted J-shape in front view, but the front shape is not limited to the substantially inverted J-shape. .. For example, if the front shape of the support has a form that extends diagonally toward the side of the support cylinder and the tip of the extending side can be fixed to the lower surface of the top plate or the top plate frame on the lower surface side of the top plate, for example. , It may be a substantially triangular gusset plate-shaped or square cane-shaped member.

Further, when the support cylinder on which the support is provided is viewed from a plane, the support is directed toward the inside of the lower surface of the top plate when viewed from the leg member to which the support cylinder is fitted. It suffices to provide at least one in a direction parallel to the outer periphery of the board. It is optional to provide two or more of the supports for one support cylinder. When two supports are provided, for example, they are provided in a substantially L-shaped or substantially V-shaped plan view.

In the present invention, it is sufficient to mount the support structure on at least two leg members located on the left and right sides of the lower surface on the back side of the top plate among the four leg members, but the support structure is mounted on the leg members. The setting is not limited to the above-mentioned form. For example, the support structure may be mounted on the two leg members on the front side of the top plate, or the support structure may be mounted on all four leg members.

The present invention provides a support in which four leg members made of substantially columnar actuators that are expanded and contracted by a drive source are externally fitted to the leg members in a close non-contact manner on a work table in which four leg members are arranged on the lower surfaces of substantially four corners of a top plate. A cylinder and a bracket-shaped support extending laterally from the upper end of the support cylinder are provided, and the tip of the support is fixed to the lower surface of the top plate or the top plate frame on the lower surface side of the top plate. Since the support structure for the leg member is formed, the support structure can suppress the tilt of the leg member that tends to tilt due to the lateral load applied to the top plate. As a result, the inclination of the leg members due to the lateral load can be suppressed without connecting the adjacent leg members in the lateral direction, so that the top plate can be smoothly raised and lowered by the simultaneous drive of each telescopic actuator forming each leg member. It can be carried out.

The front view of an example of the work table of this invention. Top view of the workbench of FIG. The right side view of the workbench of FIG. FIG. 2 is a cross-sectional view taken along the line AA of the workbench of FIG. The front view of an example of the support structure formed by the support cylinder and the support. FIG. 5 is a cross-sectional view for explaining a state in which the support structure of FIG. 6 is arranged with respect to the leg members. The front view for demonstrating the inclination of a leg member due to a lateral load. It is a partially enlarged cross-sectional view for demonstrating the inclination of a leg member, (a) is the cross-sectional view of the lower end part of each leg member when there is no support structure, and (b) is the case where it is supported by a support structure. Front view of another example of the support structure. The right side view of the support structure of FIG. Top view of the workbench provided with the support structures of FIGS. 9 and 10. A perspective view of a main part of the workbench of FIG. 11 as viewed from the leg member side on the right side of FIG.

Next, an example of an embodiment of the workbench of the present invention will be described with reference to the drawings.
In the work table LB of the present invention shown in FIGS. The top plate frame 3 for mounting the leg members 4 to 7, which will be described later, is also on the lower surface of the top plate 1 between the left and right top plate frames 2 and 2 for mounting the leg members, and is the long side of the top plate 1. Reinforcing top plate frames 4 to 7 arranged along the above are arranged at substantially four corners of the lower surface of the top plate 1 via the top plate frames 2 and 2 for attaching the left and right leg members on the lower surface of the top plate 1. It is a leg member with a substantially columnar telescopic actuator.
In the four leg members 4 to 7, 9 is an attachment for the adjuster for attaching the height adjusting adjuster 10 to the lower end surface of the leg members 4 to 7, and 9a is an attachment screw for the attachment 9. (See the partially enlarged view of FIG. 1). Further, on the lower surface of the top plate 1, wiring ducts 11 are provided by opening and closing the bottom wall, and wiring insertion holes 12 with lids are provided on the left and right sides on the back side of the top plate 1 ( (See FIGS. 2 and 3).

The top plate 1 in the workbench LB is made of a wood-based material such as MDF, or a metal material such as a steel plate.
In the illustrated embodiment, the four leg members 4 to 7 are three metal cylinders S1 to S3 coaxially stacked with each leg member having a telescopic structure, and are expanded and contracted by a feed screw mechanism (not shown). It is formed by an actuator formed so as to cause. The telescopic structure includes two cylinders or four or more cylinders, and any of them can be applied to the leg members 4 to 7 of the work table LB of the present invention. In this specification, the same reference numerals as those of the leg members 4 to 7 may be used for the actuator.

As an example, the actuators 4 to 7 are provided with a box-shaped drive unit D having a drive system such as a motor built in at the upper end, and in the illustrated example, screw members and nuts provided inside the telescopically stacked cylinders S1 to S3. While the screw member of the feed screw mechanism by the member is connected to the drive unit D, the nut member is connected to the inner cylinders S2 and S3, and is integrated with the drive unit D and overlaps with the immovable cylinder (outermost cylinder) S1. The inner cylinders S2 and S3 are expanded and contracted to change (expand and contract) the total length of the cylinders S1 to S3. That is, all of the illustrated leg members 4 to 7 are displayed in a reduced state (lowermost state of the top plate 1), but when the top plate 1 is raised from this state, a cylinder having the smallest diameter (innermost). (Cylinder) Extends from S3, then the cylinder S2 extends, and the top plate 1 reaches the highest height. Of course, the height of the top plate 1 can be positioned at an arbitrary intermediate position.
The actuators 4 to 7 constantly monitor (detect) the rotation speed of the drive system during operation, and when a sudden change in the rotation speed is detected, a safety device by a control system that stops the operation is built in the drive unit D. ing.

In the workbench LB of the present invention shown in FIGS. And the same 7 is equipped with the support structure 8 shown in FIG. 6 as an example.

The support structure 8 of FIG. 5 includes a support cylinder 81 and a bracket-shaped support 82. That is, the inner diameter of the outermost cylinder S1 of each of the leg members 6 and 7 is slightly larger than the outer diameter of the cylinder S1 (for example, the gap is changed from a gap close to 0.0 mm to a gap of about 1.5 mm). The support structure 8 is formed by a support cylinder 81 having a support cylinder 81 and a plate-shaped support 82 having a substantially inverted J-shaped bracket extending laterally at the upper end of the support cylinder 81. The bracket-shaped support 82 may be formed of a substantially triangular J-shape, a substantially triangular metal plate material, or a cane-shaped metal rod, as well as a substantially inverted J-shape when viewed from the front. Further, the support 82 may extend laterally from below the upper end of the support cylinder 81.

The base (base) 82a of the bracket-shaped support 82 of FIG. 5 is welded to the outer surface of the upper end portion of the cylinder 81 and integrated with the support cylinder 81. This integration may be by means other than welding, such as bolting. Further, a horizontal pterygium is provided on the upper portion of the support 82 on the tip end side as a mounting portion 82 b in which a horizontal pterygium is fixed to the lower surface of the top plate 1 by a fixing screw b.
In the support structure 8, the support cylinder 81 is inserted into the leg 6 (or 7) by inserting the leg 6 (or 7) from the side where the support 82 is located into the support cylinder 81 from the lower end side thereof. It is fitted externally, and the mounting portion 82b of the support 82 is fixed to the lower surface of the top plate 1 with a fixing screw b and mounted on the legs 6 or 7.

In the support structure 8, only one bracket-shaped support 82 is provided, but two support 82s may be provided on the outer peripheral surface of the support cylinder 81 as an example. In this case, the two supports 82 may be provided with an opening angle of 90 degrees when viewed from a plane, or an opening angle forming a substantially V-shaped or substantially L-shaped plan view in the vicinity thereof. It is optional that three or more of the supports 82 are provided on the support cylinder 81.

In the above description, the support structure 8 shown in FIG. 5 has two leg members 6 on the left and right on the back side (upper side of FIG. 2) of the top plate 1 when viewed from a plane among the four leg members 4 to 7. Although it was an example of mounting on the above-mentioned mounting examples, the support structure 8 can also be mounted on the front leg members 4 and 5 together with or separately from the above mounting example. If the four leg members 4 to 7 can each enjoy the tilt suppressing effect of the support structure 8, the side of the workbench LB on which the top plate 1 is supported by the leg members 4 to 7 by the four independent actuators. It is possible to further increase the strength that does not tilt with respect to a square load.

FIG. 7 shows a leg member (actuator) 7 on the right back side of the top plate 1 not provided with the support structure 8. When a lateral load W acts on the top plate 1 of FIG. 7 from the right side of this figure. , The leg member 7 is tilted as shown in FIG. 7 (FIG. 7 emphasizes the tilt).
When the leg member 7 is tilted, the sliding resistance of the sliding surfaces of the pipes S1 to S3 constituting the leg member 7 increases, and the load on the drive system is increased. Load fluctuations during operation are detected as speed fluctuations, and the operation of the actuator, which is a tilted leg member, is stopped. Therefore, the ascent or descent of the top plate 1 automatically stops during operation, and ongoing experiments and work It becomes an obstacle such as. This point is the same for the leg members 4, 5 and 8 other than the above.

Therefore, in the present invention, the left and right leg members 6 located on the back side of the top plate 1 of FIG. And 7, the support structure 8 described above was installed (see FIG. 4).

The leg member 7 that receives the lateral load W and tilts as shown in FIG. 7 is equipped with the support structure 8 shown in FIG. 5, that is, the upper end side of the support cylinder 81 is positioned from the lower end side of the leg member 7. The upper end of the support cylinder 81 is brought into contact with or close to the top plate frame 2 for attaching the leg member by being fitted into the 7 and the attachment portion 82b formed on the upper end side of the support 82 in this state is attached by the fixing screw b. By fixing to the lower surface of the top plate 1, the support structure 8 is mounted on the leg member 7 (as shown in FIG. 6).

In the embodiment of the present invention described above, the support structure 8 mounted on the leg member 7 (6) is horizontally formed at the upper end of the bracket-shaped support 82 provided on the upper portion of the support cylinder 81. The mounting portion 82b was fixed to the lower surface of the top plate 1 with a fixing screw b, so that the mounting portion 82b was supported on the lower surface side of the top plate 1.

In the present invention, as shown in FIGS. 9 and 10, the tip end side of the support 82 is formed on the vertically oriented mounting portion 82c, and the vertical mounting portion 82c is provided on the side surface of the top plate frame 3 for reinforcement. It can also be fixed with a fixing screw b (see FIGS. 11 and 12). Further, the upper part of the vertical mounting portion 82c is bent horizontally, and the bent horizontal portion 82d (see FIGS. 9 and 10) is inserted into a notch portion 3a having substantially the same shape as the horizontal portion 82d provided on the side surface of the top plate frame 3. It is also possible to take a form in which the top plate 1 is brought into contact with the lower surface of the top plate 1 while being inserted and locked to the notch 3a (see FIG. 12). The horizontal portion 82d can also be fixed to the lower surface of the top plate 1 with a fixing screw b. In FIG. 9, h is a screw hole for the fixing screw b provided in the mounting portion 82c.

In the above embodiment, the mounting portions 82b, 82c, 82d formed on the upper end side of the bracket-shaped support 82 are fixed to the lower surface of the top plate 1 or the side surfaces and lower surfaces of the top plate frames 2 and 3 with fixing screws b. However, in the present invention, the support 82 may be formed in a shape different from that of the above embodiment, and the support 82 may be fixed to both the lower surface of the top plate 1 and the top plate frame 2 or 3. The point of fixing the support 82 to both the lower surface of the top plate and the frame of the top plate can be applied even when the two supports 82 are provided in a substantially L shape in a plan view.

As described above, in the present invention, the support cylinder 81 and the support structure 8 formed by the support 82 are provided on the leg members 6 and 7 at least on the back side of the top plate of the leg members 4 to 7 that expand and contract by the actuator. If the legs are fixed to the lower surface of the top plate 1 or the top plate frames 2 and 3 at the tip of the top plate 1 and mounted, even if a lateral load W acts on the top plate 1, the leg members 4 to 7 will tilt. As shown in FIG. 8B, the outer surface of the outermost cylinder S1 of the actuator comes into contact with the inner surface of the support cylinder 81 of the support structure 8. Incidentally, when the support structure 8 is not provided, as shown in FIG. 8A, the leg members 4 to 7 are greatly tilted to increase the sliding resistance between the cylinders S1 to S3, and as a result, the drive source is stopped. However, if the support structure 8 is mounted on the leg members 4 to 7, such an obstacle does not occur.

Since the present invention is as described above, it is extremely useful as a work table including a laboratory table in which the height of the top plate needs to be changed.

LB Worktable W Side load 1 Top plate 2 Top plate frame for mounting leg members 3 Top plate frame for top plate reinforcement 4 to 7 Leg members (actuators)
8 Support structure for leg members 81 Support cylinder 82 Bracket-shaped support 82a Root (base) of support 82
82b, 82c Support mounting part b Fixing screw S1 to S3 Actuator telescopic structure tube D Actuator drive part 9 Attachment for mounting adjuster 10 Adjuster 11 Wiring duct 12 Wiring insertion hole

Claims (6)

A support cylinder in which four leg members made of substantially columnar actuators that are expanded and contracted by a drive source are externally fitted to the leg members in a close non-contact manner on a work table in which four leg members are arranged on the lower surfaces of substantially four corners of the top plate. And a bracket-shaped support extending laterally from the support cylinder, and the tip of the support is fixed to the lower surface side of the top plate so that the support cylinder is fitted onto the leg member. An elevating work table characterized in that a support structure that maintains the state and suppresses tilting of the leg member due to a lateral load is installed. The elevating work table according to claim 1, wherein the bracket-shaped support is fixed to either the lower surface of the top plate or the top plate frame, or is fixed to both the lower surface of the top plate and the top plate frame. The elevating work table according to claim 1 or 2, wherein the leg members on which the support structure is mounted are leg members located on the left and right sides of the back side of the top plate when viewed from a plane. The elevating work according to any one of claims 1 to 3, wherein the support cylinder of the support structure externally fitted to the leg member has a length equal to or slightly smaller than the reduced length of the leg member at the longest. Stand. The support cylinder has an inner diameter from a gap close to 0.0 mm to a gap of about 1.5 mm in a close non-contact state on the inner surface of the support cylinder fitted to the outer surface of the leg member. An elevating workbench according to any one of claims 1 to 4. The bracket-shaped support is provided on the support cylinder in a direction substantially parallel to the long side and / and the short side of the outer shape of the top plate when viewed from a plane, and the upper end portion of the support is provided on the lower surface of the top plate and the top plate frame. The elevating workbench according to any one of claims 1 to 5, which is formed so as to be fixed to at least one of the above.

Images