JPH0720281U - Folding workbench - Google Patents

Abstract

(57) [Summary] [Purpose] When folded, it is extremely narrow and convenient for transportation and storage, and when unfolded, the columns are supported vertically and the worktable is a horizontally supported workbench. [Structure] Two sets of a base frame 1 consisting of a pair of members 2 which can be folded in two upwards about a shaft 3 are arranged side by side, and an elevating member 5 mounted on both columns 4 connected to both base frames 1 The lower arm 7 connected to both sides is rotatably connected to each member 2. A detachable fixing means for fixing the lifting member 5 to the lower limit position and a fixing means for fixing the lifting pillar 26 mounted on the upper end of the pillar 4 so as to be lifted up and down are provided, and both the lifting pillars 26 and the work table 25 are provided. The work platform 25 is connected by the support rod 27, and the work platform 25 is supported by the support rod 27 and the upper arm 43.
Connect to 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a foldable workbench used at a construction site or the like.

[0002]

[Prior art]

 Conventionally, worktables used at construction sites include folding table-shaped worktables.Two or more worktables are placed and the end of the bridge is placed on the workbench, or a foldable stepladder. For example, there are two or more support bases that are lined up and used to hand over the board.

[0003]

[Problems to be solved by the device]

 Among the above-mentioned conventional work benches, the folding table-like work takes up space and is inconvenient for use in narrow spaces, and the height cannot be adjusted. Also, the one using a stepladder-like support stand cannot be used as a work stand by itself because the top end of the support stand is narrow.Therefore, a work board should be placed on the cross rail below the top end as a work stand. Since it must be done, there is a problem in that the upper ends of both side frames of the support stand project on both sides of the passing plate, which causes a problem.

An object of the present invention is to solve the above problems of the conventional workbench and to provide a foldable workbench which is foldable and whose height can be easily adjusted.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is arranged in such a manner that two sets of base frames, which are a pair of members connected so that they can be folded in two upwards about a central axis, are arranged side by side. With the central shaft of the above, the lower ends of the left and right columns are rotatably connected, and the lower ends of the two lower arms whose upper ends are rotatably connected to both sides of the elevating member mounted on both columns. Is rotatably connected to each member of the both base frames, and at the lower limit position of the elevating member, the elevating member is supported with respect to the column with the lower arms supporting the members horizontally. There is a fixing means for engaging and disengaging, and a fixing means for arbitrarily fixing the elevating pillar mounted on the upper ends of the above-mentioned supporting pillars to the supporting pillars is provided near the upper ends of the both supporting pillars. , One end at the center of each side of the workbench The other ends of the pair of rotatably connected support rods are rotatably connected to each other, and one end of each of the upper arms is rotatably connected to a predetermined position from the center of both side edges of the worktable. The other end is rotatably connected to joints that are detachably fixed to both upper parts of the lifting column.

[0006]

[Action]

 The center column of a horizontal base frame consisting of a pair of members is vertically supported by a lower arm. In this state, if the elevating member is fixed to the support by the fixing means, the support does not fall down.

In addition, the workbench is supported downward or upward with respect to the upper end of the elevating column by a supporting rod rotatably connected to the elevating column, and at this time, each upper arm is directed diagonally downward or diagonally upward. And support the work table horizontally.

When the upper arms on both sides of the workbench are removed from the lifting columns, the workbench becomes free, and when the supporting rods and arms are hung down and the workbench is made vertical, these are placed between the left and right columns. Becomes almost parallel to.

When the fixing means of the lower elevating member is released and the elevating member is raised, the lower arm pulls up each member of the base frame and rotates it upward, thereby making each member substantially parallel to the column. In this state, it is extremely narrow and bulky, which is convenient for transportation and storage.

[0010]

【Example】

 In the embodiment shown in the drawings, reference numeral 1 denotes a base frame, which connects a pair of members 2 by a shaft 3 and folds only in an upward direction with the shaft 3 as a center so as to be downward from a horizontal state as shown in FIG. The member 2 is prevented from turning by hitting the opposite ends of the member 2. Reference numeral 4 is a pillar made of a square pipe, the lower end of which is pivotally connected to the base frame 1 by the shaft 3 and an elevating member 5 made of a square tube is slidably mounted on the outside of the pillar 4. .

The middle of the horizontal piece 6 is fixed to both side surfaces of the upper end of the elevating member 5, and the upper end of the lower arm 7 is rotatably connected between both ends of each horizontal piece 6 by a shaft 8. As shown in FIG. 6, each member 2 has a U-shaped cross section, and the lower end of each lower arm 7 is inserted into the member 2 and is rotatably connected by a shaft 9.

The two pairs of the base frame 1 and the columns 4 as described above are arranged side by side as shown in FIG. 6, and a circular pipe is bent upward in a U-shape on the support piece 10 on the upper end side of each column 4 to form a connecting frame 11. The both ends facing upward are rotatably connected by a shaft 12. Further, a laterally projecting piece 13 is fixed to the lower part of each of the columns 4, and an operating shaft 14 is rotatably and reciprocally inserted into a hole provided in the projecting piece 13, and a knob 15 is provided at one end thereof.

As shown in FIG. 2, a pair of flanges 16 and 17 are fixed by sandwiching the protruding piece 13 near one end of the operation shaft 14, and a spring 18 is mounted between the protruding piece 13 and the flange 17 in a compressed state. So that the collar 16 is in contact with the outside of the protrusion 13.

Guide pieces 19 are provided on the upper ends of the protrusions 13, and upper portions of inverted L-shaped stoppers 20 fixed to upper sides near both ends of the operation rod 14 are slid into guide holes of the guide pieces 19. It is movably inserted to prevent the operating rod 14 from rotating. Further, a locking piece 21 is fixed to the lower end side surface of the elevating member 5, and the stopper 20 can be engaged and disengaged with an engagement hole 22 formed in the locking piece 21.

Reference numeral 25 is a workbench provided between the upper parts of the left and right columns 4, and 26 is an elevating column slidably fitted in the upper ends of the columns 4, on the opposite sides of the upper and lower columns 26 near the upper ends. Respectively, one end of each one of the support rods 27 is rotatably connected by a shaft 28, and the other ends of both the support rods 27 are rotatably connected by shafts 29 on both sides of the work table 25. When the support rod 27 is hung, the workbench 25 is positioned above the connecting frame 11.

As shown in FIG. 3, a plurality of engaging holes 31 are provided on the upper and lower sides of the lower and upper columns 26, and stoppers 32 fixed to both sides of the connecting frame 11 are provided in the guide holes of the column 4. The lifting column 26 is fixed to the column 4 at an arbitrary height by engaging with any of the engaging holes 31 through 33.

Further, as shown in FIG. 3, a fixed hook 36 is rotatably attached to a shaft 35 fixed to an appropriate position on the outer side of the support column 4, and the fixed hook 3 is fixed to a pin 37 fixed to the outer side of the connecting frame 11. 6 is engaged to prevent the stopper 32 from coming off.

As shown in FIG. 3, spacers 39 and 40 having downward U-shape and upward U-shape are combined in the upper end of the elevating support column 26, and bolts are inserted through the support column 26 and the spacer 40 above and below this portion. The holes 41 and 42 are provided. Two upper arms 43 are rotatably connected to both side edges of the work table 25 by shafts 44, respectively, at positions at a fixed distance from the center thereof.

As shown in FIG. 4, an L-shaped joint 46 is rotatably connected to a free end of one upper arm 43 on the same side edge of the work table 25 by a shaft 45, and a bolt is connected to the joint 46. Fix 47. An L-shaped joint 48 is also connected to the free end of the other upper arm by a shaft 45, and a seat plate 49 is fixed to this joint 48.

A wing nut 50 is rotatably mounted in a recess on the outside of the seat plate 49 so as not to slip out, and a bolt insertion hole 51 is provided in the seat plate 49 and the joint 48 so that the insertion hole 42 is inserted into the insertion hole 42. By inserting the inserted bolt 47 into the insertion hole 51 and screwing the nut 50 into the bolt 47, the joints 46 and 48 are fixed to both sides of the elevating column 26.

Reference numeral 53 denotes a transfer plate fixing frame provided on the workbench 25, which has a pair of left and right sides in an upward U shape as shown in FIG. 6, and the upward pieces at both ends of each fixed frame 53 slide in the vertical holes of the workbench 25. It freely penetrates and projects onto the work table 25, and locking pieces 54 are provided inwardly on the upper ends of the upward pieces.

Further, by tightening a tightening bolt 55 from below into a screw hole provided in the lower center of the fixed frame 53, and pressing the upper end of the bolt 55 against the lower surface of the work table 25 to tighten the work table 25. The upper portions of both sides of the transfer plate placed on the work piece 25 are fastened and fixed on the work table 25 by the locking pieces 54.

In the above-described embodiment, FIGS. 1 and 6 show a state in which the base frame 1 is unfolded and the workbench 25 is horizontal. At this time, the elevating member 5 is at the lower limit, and the stopper 20 is as shown in FIG. As described above, the base frame 1 and the support column 4 are engaged with the engaging hole 22 of the locking piece 21 and are integrally coupled by the lower arm 7.

The workbench 25 is horizontally supported by the support rod 27 and the upper arm 43, and the stopper 32 of the connecting frame 11 engages with the upper engaging hole 31 of the elevating column 26 as shown in FIG. Since the support columns 4 and 26 are connected to each other and the fixed hook 36 locks the pin 37, the work table 25 is kept horizontal at a constant height.

When it is desired to raise the workbench 25 slightly, the fixed hook 36 shown in FIG. 3 is turned upward to remove it from the pin 37, the connecting frame 11 is turned outward, and the stopper 32 is moved from the upper engaging hole 31. When the lift column 26 is removed and the lift column 26 is raised, the lift column 26 is raised by one pitch so that the lower engaging hole 31 is aligned with the guide hole 33 and the stopper 32 is engaged with the lower engaging hole 31. 25 goes up one pitch, and then the pin 37 is locked by the fixed hook 36.

By the above operation, the workbench 25 can be moved up and down at the pitch of the engagement holes 31. Further, when the wing nut 50 shown in FIGS. 3 and 4 is rotated to remove the bolt 47 from the wing nut 50, each upper arm 43 is removed from the elevating column 26.

Next, after turning both support rods 27 upward to raise the workbench 25, each upper arm 43 is turned downward about the shaft 44, as shown by the chain line in FIGS. 1 and 3. The free end of each arm 43 is connected to the upper part of the lifting column 26 by bolts 47 and nuts 50 in the same manner as above. In the case of folding, the bolts 47 are removed from the lifting column 26, the upper arms 43 are removed from the lifting column 26, the support rods 27 and the arms 43 are hung, and the work table 25 is vertically erected to lift the column 26 and the column 4. Located in between.

Further, with the knob 15, the operation shaft 14 is pulled to pull out each stopper 20 from the engaging hole 22 of each elevating member 5, the elevating member 5 is freed, and this member 5 is raised along the support column 4. Then, each member 2 of the base frame 1 turns upward about the shaft 3, and the lower arm 7 and the support column 4 and the member 2 are substantially parallel to each other as shown in FIG.

As shown in FIG. 1, if one member 2 is provided with a notch 23, the operation shaft 14 enters the notch 23 during the above-mentioned folding so that the member 2 approaches the strut 4. Can be made.

[0030]

【effect】

 In this invention, the workbench is vertically housed between the left and right struts in the folded state as described above, and the base frame is folded in two upwards along the stanchions, and the lower arm and the upper arm are also along the stanchions. Saves space when storing or shipping. When it is unfolded and used as a workbench, the elevating and lowering columns are moved up and down with respect to the columns, and the support rod and the upper arm supporting the workbench are rotated downward and upward to fix the workbench in multiple stages. The effect is that it can be changed to a shape.

[Brief description of drawings]

FIG. 1 is a front view of a developed state of an embodiment.

[FIG. 2] Partially longitudinal enlarged side view near the lower stopper as above.

FIG. 3 is a partially longitudinally enlarged front view showing the upper mechanism.

FIG. 4 is an enlarged cross-sectional plan view taken along the line AA of FIG.

FIG. 5 is a front view of a folded state of the embodiment.

FIG. 6 is a perspective view of an embodiment.

[Explanation of symbols]

 1 Base Frame 2 Member 3 Shaft 4 Strut 5 Lifting Member 7 Lower Arm 11 Connecting Shaft 14 Operating Shaft 15 Knob 20 Stopper 21 Locking Piece 22 Engagement Hole 25 Working Table 26 Lifting Strut 27 Support Rod 31 Engagement Hole 32 Stopper 36 Fixing Hook 37 pin 46 joint 48 joint

Claims (1)

[Scope of utility model registration request] 1. Two sets of base frames composed of a pair of members connected so as to be able to be folded in two upwards about a shaft of a central portion are arranged side by side, and by the shafts of the central portions of the both base frames, The lower ends of the left and right columns are rotatably connected to each other, and the lower ends of two lower arms whose upper ends are rotatably connected to both sides of an elevating member attached to the columns are respectively connected to the members of the base frames. Rotatably connected to each other, and at the lower limit position of the elevating member, with the lower arms supporting the members horizontally, the detachable fixing means for fixing the elevating member to the column is provided. The upper and lower ends of each of the columns are provided with a fixing means for arbitrarily fixing the lifting column to the columns, and one end is provided near the upper ends of the two columns, respectively, at the center of both side edges of the workbench. Of a pair of support rods that are rotatably connected The other end is rotatably connected to each other, and the other end of each pair of upper arms whose one end is rotatably connected to a predetermined position from the center of both side edges of the workbench is attached to and detached from the upper and lower sides of the lifting column. A foldable workbench that is rotatably connected to a freely fixed joint.