JPH10139388A - Work height adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent parts from entering from the side of a table by providing an elevating table and a cover means for covering the side of the table, and varying the vertical length of the cover means according to the elevation of the table. SOLUTION: A slide cover 20 comprising cover plates 21, 22, 23 is provided between elevating work tables 10. The cover plate 21 has a recessed engagement part 21a formed on the lower end thereof, and the cover plate 22 has the base fixed to a floor 30. The cover plate 23 connects the mutual upper ends of the cover plates through a connecting plate 24. Downward engagement projections 24a are formed on the right and left end parts of the connecting plate 24 to be opposite to the engagement part 21a of the left cover plate 21. With the right and left work tables 10 to a designated position, the sides of the right and left work tables are covered with the cover plates 21, 23 positioned on the table 10 side and the cover plate 22, so that a falling material will not enter below the work table 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work height adjusting device suitable for use in an assembly line for articles.

[0002]

2. Description of the Related Art In an assembly line for assembling a motorcycle body or a four-wheeled vehicle body, the work height is adjusted according to the size of the work, the position at which the parts of the work are assembled, the height of the work, and the like. Therefore, the work table 1 as shown in FIG. 8 is conventionally arranged on the line side as a step.

Each work table 1 shown in FIG. 1 is disposed adjacently along an assembly line (not shown). Each work table 1 has a plate-shaped table body 1a and a telescopic support for supporting the table body 1a horizontally and vertically. And a possible leg 1b. The table body 1a moves up and down by extending and contracting the leg 1b in the vertical direction.

[0004]

As shown in the figure, when the heights of the adjacent work tables 1 are different from each other, the upper side of the work table 1 having the larger height is open. Conventionally, therefore, a falling object such as a part falls and intrudes below the table 1 from the open portion.

When a fallen object enters below the table 1, the efficiency of the assembling operation is reduced due to the trouble of searching for the fallen object. Further, there is a possibility that the falling object interferes with the elevating mechanism of the table 1 and damages the elevating mechanism.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work height adjusting device capable of preventing intrusion of components and the like from the side of a table in view of such a situation.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a vertically movable table and cover means for covering the sides of the table, wherein the vertical length of the cover means is changed according to the elevation of the table. It is characterized by having.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG.
Numeral 0 is disposed adjacent to a line side of an assembly line (not shown) for assembling a vehicle body or the like of a four-wheeled vehicle along a longitudinal direction of the assembly line.

The work table 10 includes a plate-shaped table main body 10a and extendable legs 10b for supporting the table main body 10a horizontally and vertically. The leg 10b is moved by an actuator (not shown). The table body 10a can be moved up and down by expanding and contracting.

A slide cover 20 is provided between the work tables 10. This slide cover 20
As shown in an enlarged manner in FIG.
The work table 10 is composed of a cover plate 21 which hangs down from the opposite end faces, a cover plate 22 which is erected at an intermediate position between the work tables 10, and a pair of cover plates 23 provided so as to sandwich the cover plate 22. ing.

Each of the cover plates 21 has a concave engaging portion 21a formed by curving its lower end toward the cover plate 22 side. The above cover plate 22
The base is fixed to the floor 30, and the cover plates 23 are connected to each other at their upper ends via a connection plate 24.

At the left and right ends of the connection plate 24,
Downward engaging projections 24a are formed, the left-side engaging projections 24a are on the engaging portions 21a of the left cover plate 21, and the right-side engaging projections 24a are on the right cover plate 21. , Respectively.

The left and right work tables 10 shown in FIG.
Each table body 10a is lowered to the lower position. At this time, the cover plate 21 of each work table 10 is in a state where its lower end is close to the floor 30, that is, in a state where it covers the side of the work table 10, and the connection plate 24 has its height. Are interposed between the cover plates 21 in such a manner as to match the upper surface height of each table body 10a.

Therefore, even if parts, tools, and the like are accidentally dropped toward the boundary of the work tables 10 while performing the assembly work on There is no danger of intruding below the table 10.

Next, a case where the table body 10a of the right work table 10 is raised to the middle position as shown in FIG. 3 will be described.

In this case, the cover plate 21 of the working table 10 on the right side is
4 rises to a height at which it engages with the engagement projection 24a at the right end of the cover plate 4, while the cover plate 23 maintains the state of FIG.

Therefore, the right working table 10
Is covered by the cover plate 21 and the lower side half thereof is covered by the cover plate 23. As a result, falling objects such as the above-mentioned parts enter the work table 10 below. There is no danger.

When the right work table 10 is further raised from the state shown in FIG.
In addition, since a lifting force acts on the cover plate 23 via the engagement projection 24 a of the connection plate 24, the cover plate 23 rises while being guided by the cover plate 22.

FIG. 4 shows a state in which the right work table 10 is raised to the uppermost stage. In this state,
The side of this right work table 10 is the cover plate 2
1, because the cover plate 23 and the cover plate 22 cover, the falling object does not enter below the work table 10.

In the state shown in FIGS. 3 and 4, the side of the left work table 10 is covered by a cover plate 21 attached to itself, and therefore, the lower side of the left work table 10 is moved downward. Is also prevented.

With the right work table 10 positioned at the lowermost position, the left work table 10 may be raised to the middle position and the uppermost position. The operation in this case is easily guessed from the above description. Therefore, the description is omitted here.

As shown in FIG. 5, when the left and right work tables 10 are respectively raised to the middle stages, the cover plates 21 and 23 located on the work table 10 side To cover. Therefore, there is no possibility that the falling object enters below each work table 10.

FIG. 6 shows a state in which the left and right work tables 10 are respectively raised to the uppermost stages. In this case, the side of the left work table 10 is
The cover plate 21 and the cover plate 23 which are located on the side of the work table 10 and the cover plate 21 and the cover plate 23 which are located on the table 10 side And the cover plate 22. Therefore, also in this case, the entry of the falling object below each work table 10 is prevented.

FIG. 7 shows another embodiment of the height adjusting device according to the present invention. The slide cover 20 'in this height adjusting device is provided with a cover plate 21' corresponding to the cover plate 21 on the left and right work tables 10, respectively. Then, two cover plates 22 'are erected on the floor 30 so as to face each other, and a cover plate 23' is loosely fitted between the cover plates 22 '. It has a configuration in which a connecting plate 24 'having the same shape as that of the connecting plate 24 is attached.

As is clear from the structure, the slide cover 20 'has the slide cover 2' shown in FIG.
The operation according to the operation 0 (the operation of changing the vertical length according to the elevation of the table 10), that is, the operation according to the operation shown in FIGS. 3 to 6 is performed. Therefore, even in the height adjusting device of FIG. 7, it is possible to prevent a falling object from entering below each work table 10.

The number of steps of height change of each table 10 is three, but if necessary, the number of steps of height change is four.
The slide cover 20 can be configured to have more than one step.

In place of the slide cover 20,
It is also possible to cover the sides of each table 10 with curtain-type cover means (for example, a bellows-type curtain) that moves up and down according to the elevation of each table 10.
However, in this case, it is necessary to provide a means for preventing the curtain portion from sagging.

[0028]

According to the present invention, when a component or the like falls during the assembling work on the work table, the fallen object can be prevented from entering below the table. Therefore, the efficiency of the assembling operation can be improved, and the lifting mechanism provided below the work table can be prevented from being damaged.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a slide cover.

FIG. 3 is a longitudinal sectional view showing an operation of a slide cover with respect to a change in the height of a work table.

FIG. 4 is a longitudinal sectional view showing an operation of a slide cover with respect to a change in the height of a work table.

FIG. 5 is a longitudinal sectional view showing the action of the slide cover with respect to a change in the height of the work table.

FIG. 6 is a longitudinal sectional view showing the action of the slide cover with respect to a change in the height of the work table.

FIG. 7 is a conceptual longitudinal sectional view showing another embodiment of the present invention.

FIG. 8 is a conceptual diagram showing the operation of a conventional work height adjusting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Working table 10a Table main body 10b Leg 20 Slide cover 21-23, 21'-23 'Cover plate 21a Engaging part 24 Connecting plate 24a Engaging projection 30 Floor

Claims (1)

[Claims] 1. A work table capable of moving up and down, and a cover means for covering a side of the table, wherein the cover means has a work height configured to change its vertical length in accordance with the elevation of the table. Adjustment device.