JP2011246992A - Folding workbench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding workbench capable of performing an easy folding operation by releasing a lock mechanism through rotation of a release lever outwardly at an end of a top board.SOLUTION: A lock mechanism 5 is provided by foldably connecting each upper end portion of a front leg and a rear leg to a front end and a rear end of a top board 2 so that a usable position A and a foldable position B are locked between the front end of the top board 2 and an upper end of a front leg 3. The lock mechanism 5 includes a supporting member 6 fixed to the top board 2, a lock pin 7 slidably supported laterally at the supporting member 6 having its top end protruding to be engageable with the front leg 3, and urging means 8 that urges the lock pin 7 in a protruding direction. The lock pin 7 is provided with a release lever 9 that is rotated around a core of a pin shaft. Pin retracting means 10 is provided between the supporting member 6 and the release lever 9 for sliding the lock pin 7 against the urging means 8 by rotating the release lever 9 outwardly with respect to the top board 2.

Description

  The present invention relates to a folding workbench that can be used for work at high places.

  In the prior art of the folding workbench, as disclosed in Patent Document 1, both upper and lower edges of the top plate swing with respect to the top plate, respectively. It is connected so that it can be opened when the platform is used and closed when the platform is stored, and a locking mechanism that locks the top plate and the front and rear legs in the open state and closed when the platform is stored is A lock lever for operating the lock mechanism having a swing end that can be moved toward and away from the swing center of the leg is provided, and the lock mechanism is fixed in the vicinity of the swing center of one of the front and rear legs. And a lock plate having two lock holes corresponding to an open state and a closed state, which are spaced apart on a circumference centered on the center of swinging, and a ceiling plate so as to be able to appear and disappear in both lock holes. Supported by the plate and advanced by the lock lever And a lock pin which is allowed (claim 1).

  Then, the lock lever swings the knob toward the front side (in the direction away from the front leg), so that the lock lever is swung forward with the front edge of the short plate of the lock lever as a fulcrum. Thus, the lock pin is pulled out, whereby the lock pin is pulled out of the open-state lock hole, and the top plate and the front leg are free to swing relative to each other (paragraph No. 0018).

JP 2009-180064 A

In the prior art, when the lock is released to fold the work table, the lock lever (release lever) disposed at the end of the top plate is swung to the front side, that is, the back side of the top plate (inward). Therefore, it is difficult to perform the folding operation because the swinging direction of the lock lever and the direction in which the front leg is lifted are opposite to each other.
It is an object of the present invention to provide a folding work table that can solve the problems of the prior art.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a folding work table that can release a lock mechanism by rotating a release lever outward at an end of a top plate so that a folding work can be easily performed.

Specific means for solving the problems in the present invention are as follows.
First, the upper end portions of the front and rear legs 3 and 4 are connected to the front and rear end portions of the top plate 2 in a foldable manner so that the top plate 2 is horizontal between the front end portion of the top plate 2 and the upper end portion of the front legs 3. A locking mechanism 5 is provided for locking both the use posture A and the folding posture B in which the front leg 3 is folded with respect to the top board 2;
The lock mechanism 5 includes a support member 6 fixed to the top plate 2, a lock pin 7 that is supported by the support member 6 so as to be slidable in the left-right direction, and whose tip protrudes and can be engaged with the front leg 3. Biasing means 8 for biasing 7 in the protruding direction,
By providing the lock pin 7 with a release lever 9 that rotates around the pin axis, and by rotating the release lever 9 outwardly with respect to the top plate 2 between the support member 6 and the release lever 9. A pin retracting means 10 for sliding the lock pin 7 against the biasing means 8 is provided.

Second, the pin retraction means 10 of the lock mechanism 5 is formed on the support member 6 so as to be able to contact the release lever 9 and converts the rotation of the release lever 9 into movement in the pin axis direction. It is characterized by being.
Thirdly, the lock mechanism 5 is positioned at least on one side of the top plate 2 and in the use posture A, the release lever 9 is in a downwardly outward posture with respect to the top plate 2 from the lock pin 7 in the locked state. It is characterized by being able to rotate outward.

Fourth, the lock mechanism 5 is located on both the left and right sides of the top plate 2 and is connected by an interlocking member 11 that rotates the left / right release lever 9 simultaneously while allowing the release lever 9 to move in the pin axis direction. It is characterized by that.
[Action]
The folding work table having the above-described features has the following effects.

In the use posture A, the top plate 2 is supported by the upper end portions of the front and rear legs 3 and 4 connected to the front and rear end portions, and the front end portion of the top plate 2 and the upper end portion of the front leg 3 are swung by the lock mechanism 5. It is blocked.
In this use posture A, when the release lever 9 is rotated outward with respect to the top plate 2, the lock pin 7 is slid against the biasing means 8 by the pin retracting means 10, and the unlocked state is established. Become.

Since the release lever 9 is rotated outward with respect to the top plate 2, it can be lifted upward as it is, and the lifting force to fold the front leg 3 becomes the force in the same direction and assisting force. Folding is easy.
The pin retraction means 10 of the lock mechanism 5 is a cam portion 6A that is formed on the support material 6 so as to be able to contact the release lever 9 and converts the rotation of the release lever 9 into movement in the pin axis direction. Can be formed.

  The lock mechanism 5 is located on at least one side of the left and right sides of the top plate 2 and can be changed from the left and right sides of the workbench to the use posture A and the folding posture B. When the use posture A is set, the release lever 9 is locked. The lock pin 7 is directed downward from the top plate 2, and the release lever 9 is pivoted outward and upward, so that it is substantially the same as the direction of lifting the front leg 3 to be folded, and the work table is more folded. It becomes easy.

  By providing the lock mechanism 5 on both the left and right sides of the top plate 2 and connecting the left / right release lever 9 with the interlocking member 11, the left / right lock mechanism 5 can be rotated simultaneously.

  According to the present invention, the lock mechanism can be released by rotating the release lever outward at the end of the top plate, and the folding work can be facilitated.

It is a perspective view of the principal part which shows embodiment of this invention. It is a side view of the principal part. It is a front view of the principal part. It is a bottom view of the principal part. It is a side view of the work bench of a use posture. It is a front view of the work bench of a use posture. It is a side view of the working table of a folding posture. It is a front view of the working table of a folding posture. It is a front view which shows the modification of a locking mechanism.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 8, the folding work table 1 includes a top plate 2 and front and rear legs 3 and 4 having upper end portions foldably connected to front and rear end portions of the top plate 2. A locking mechanism 5 is provided between the front end portion of the front leg 3 and the upper end portion of the front leg 3. With this locking mechanism 5, the top plate 2 is in a horizontal use posture A and a folding posture B in which the front leg 3 is folded with respect to the top plate 2. The posture can be changed.

The top plate 2 is integrally formed with a plurality of front and rear cross beam member portions 2B on the lower surface of a flat tread plate portion 2A, and channel-shaped edge members 2C are fixed to both left and right ends of the tread plate portion 2A and the cross beam member portion 2B. Is formed. A connector 14 is bolted to the left and right front ends of the top plate 2, and a receiving surface 14 a that is inclined outward and upward is formed on the lower surface of the connector 14.
The rear leg 4 is formed by connecting a pair of left and right rear leg columns 4A arranged in a downwardly extending manner by a plurality of upper and lower (in the embodiment, two stages) rear horizontal bars 4B, and on the upper ends of the left and right rear leg columns 4A. The swinging tool 15 is fixed, and this swinging tool 15 is connected to the rear end of the top plate 2 via the swinging pin 16.

A support plate 4C is fixed to the middle part of the rear leg 4 in the vertical direction, and the rear end of the linkage rod 17 is connected to the support plate 4C. The front end of the linkage rod 17 is connected to the front leg 3, and the front and rear legs 3 and 4 are restrained from spreading in the front and rear direction when in the use posture A. A pair of linkage rods 17 are provided on the left and right of the work table 1.
As shown in FIGS. 5 and 7, the linkage rod 17 can change its posture without being disconnected from the front and rear legs 3, 4 even when the front and rear legs 3, 4 are folded and in the folded posture B. The dimension between both ends is set as follows.

The front leg 3 is formed by connecting a pair of left and right front leg columns 3A arranged in a downwardly extending manner by a plurality of upper and lower front horizontal bars 3B (in the embodiment, two levels), and an end face member at the upper end of the left and right front leg columns 3A. 3C is provided and a rotating tool 19 is fixed to the outer surface, and this rotating tool 19 is connected to a connecting tool 14 at the front end of the top plate 2 via a rotating pin 20.
The rotating tool 19 is fixed to the left and right outer surfaces of the upper ends of the left and right front leg pillars 3A, and faces the left and right outer surfaces of the left and right connecting tools 14 of the top plate 2. A rotating pin 20 formed of a bolt rotates with the connecting tool 14. It penetrates through the moving tool 19. The rotation pin 20 is located below the front part of the top plate 2 and behind the upper part of the top plate 2.

The left and right front leg pillars 3A of the front legs 3 can have their upper end face members 3C abutted against the holding faces 14a of the couplers 14, and when in the use posture A, the front left and right front leg pillars 3A And is configured to share the load support with the rotation pin 20.
The inclination angle of the front leg 3 with respect to the ground is smaller than that of the rear leg 4, and the opening leg angle in the use posture A is larger for the front leg 3 than for the rear leg 4, and the user uses the front leg 3 rather than using the rear leg 4. Is easier to move up and down.

The lock mechanism 5 includes a support member 6 fixed to the top plate 2, a lock pin 7 supported by the support member 6 so as to be slidable in the left-right direction, and a biasing means 8 for biasing the lock pin 7 in a protruding direction. And a pin retracting means 10 for sliding the lock pin 7 against the urging means 8.
The support member 6 is a sheet metal bent in a U-shape, the central upper part is fixed to the back surface of the tread plate portion 2A, pin holes 6b are formed on both left and right end surfaces, and bent inward from the left and right outer end surfaces. A plate portion is formed, and a cam portion 6A constituting the pin retracting means 10 is formed on the plate portion.

  The lock pin 7 bends one bar, and forms a straight end portion 7a, a first bend portion 7b that is bent at a right angle from the straight end portion 7a, and a right angle from the first bend portion 7b. A parallel portion 7c that is bent in parallel with the tip straight portion 7a, a second bent portion 7d that is bent at a right angle from the parallel portion 7c, and a right angle from the second bent portion 7d. Thus, the tip straight portion 7a and the concentric base straight portion 7e are formed.

The front straight portion 7a acts as a lock pin 7, the first bent portion 7b acts as a release lever 9, the parallel portion 7c acts as a grip for turning the release lever 9, and the base straight portion 7e It constitutes a part of the urging means 8.
The tip straight portion 7a and the base straight portion 7e are slidably inserted into the pin hole 6b of the support member 6, and a spring 22 is fitted between the base straight portion 7e and the support member 6, and the lock pin 7 is attached. A biasing means 8 for biasing in the protruding direction is configured.

The lock pin 7 is parallel to the rotation pin 20, passes through the edge member 2 </ b> C of the top plate 2 and the connection tool 14, can freely move out of the connection tool 14, and engages with the rotation tool 19 by protruding. Is possible.
Locking pin holes 19 a and 19 b are drilled in the rotating tool 19 at two positions in the rotating direction around the rotating pin 20. The lock pin hole 19a engages with the lock pin 7 in the use posture A, and the lock pin hole 19b engages with the lock pin 7 in the folding posture B, and locks the respective postures so that they cannot be changed.

The release lever 9 formed by the first bent portion 7b is bent into a dogleg shape in a side view, and protrudes forward and downward from the base end of the lock pin 7 in the side view of the use posture A in FIG. It protrudes horizontally forward from its tip, and is in an outwardly downward posture with respect to the top plate 2 and the lock pin 7 in the use posture A.
Although the release lever 9 can be gripped by itself, the lock pin 7 is rotated by turning the parallel lever 7c bent from the tip of the release lever 9 as a gripping portion and turning outward from the outwardly downward posture. Can be rotated around the pin axis. The release lever 9 is in contact with a cam portion 6 </ b> A and a recess 6 </ b> B formed on the plate portion of the support member 6.

The recess 6B is in contact with the release lever 9 to set the protruding position of the lock pin 7 and to allow the lock pin 7 to retreat. The cam portion 6A is formed continuously from the recess 6B.
As shown in FIGS. 1 and 4, the cam portion 6A is formed with a cam surface 6a inclined at the front end portion of the top plate 2 from the left and right outer sides on the back side to the left and right inner sides on the front side. When the contact release lever 9 is rotated, the release lever 9 slides on the cam surface 6a, moves inward in the left-right direction at the front end of the top plate 2, and moves the lock pin 7 backward and straight.

Therefore, the rotation of the release lever 9 can be converted into the movement of the lock pin 7 in the pin axis direction by the cam portion 6A, and the release lever 9 is placed between the support member 6 and the release lever 9 in the ceiling. The pin retracting means 10 is configured to slide the lock pin 7 against the urging means 8 by rotating outward with respect to the plate 2.
1 to 8, the lock mechanism 5 is disposed only on the left side of the top plate 2, but may be disposed on the right side or both the left and right sides of the release lever 9 including the parallel portion 7 c. The gripping part is preferably located on the front end side of the top plate 2 with respect to the lock pin 7 and protrudes outward and downward from the lock pin 7, so long as it can be rotated from an outwardly downward position to an outwardly upward position when rotating. Good. The gripping portion of the release lever 9 can be rotated even if it is located directly below the lock pin 7, but the rotation operation is easier in the outward downward posture.

Next, the posture changing operation between the use posture A and the folding posture B of the work table 1 will be described.
When the lock mechanism 5 is disposed on the left and right sides of the top plate 2, the lock mechanism 5 stands on the front surface of the work table 1, that is, in front of the front leg 3, or on the side surface on the side where the lock mechanism 5 is provided. When the mechanisms 5 are arranged on the left and right sides of the top plate 2, stand on the front surface of the work table 1, and the release lever 9 faces the top plate 2 from an outwardly downward posture to an outwardly upward direction (in the direction of arrow S in FIGS. ). When the lock mechanism 5 is on one side, the release lever 9 can be operated with one hand.

When the release lever 9 is rotated from the use posture A in FIG. 5, the rotation is converted into movement in the pin axis direction by the cam portion 6 </ b> A of the pin retracting means 10 and slides against the biasing means 8 together with the lock pin 7. Then, the lock pin 7 comes out of the lock pin hole 19 a of the rotating tool 19 and releases the state where the front leg 3 is locked with respect to the top plate 2.
When the rotated release lever 9 is moved upward as an extension operation in the rotation direction, the force is lifted in order to fold the front leg 3 and becomes a force in the same direction, and the front leg 3 can be lifted easily. The front end of the top plate 2 is lifted by lifting the front leg 3, and the top plate 2 enters the unlocked state in which it extends from the use posture A bent with respect to the rear leg 4.

  When the front leg 3 is lifted to overlap with the top plate 2 and the top plate 2 and the rear leg 4 are held and the hand is released from the release lever 9, the release lever 9 is moved to the cam surface of the cam portion 6A by the biasing means 8. 6a slides in the opposite direction, and the release lever 9 moves left and right together with the lock pin 7 while rotating back. The lock pin 7 engages with the lock pin hole 19b of the rotating tool 19 by moving the pin axis in the left and right outward directions, and locks the work table 1 in the folding posture B.

In order to change the workbench 1 from the folding posture B to the use posture A, it is only necessary to perform the reverse operation of the folding, and the rotation operation for releasing the release lever 9 is performed by the front end of the top plate 2 and the upper end of the front leg 3. Thus, the front leg 3 can be easily lowered while operating the release lever 9.
Note that the posture change of the work table 1 does not necessarily require the front legs 3 to be raised and lowered, and may be raised and lowered relative to the top plate 2 and the rear legs 4. That is, from the state where the release lever 9 is rotated and unlocked in the use posture A, the front leg 3 is moved to the front side while the lower end of the front leg 3 is grounded to bring the front leg 3 into the vertical posture, and the front leg 3 is further tilted forward. When the posture is changed, the rear leg 4 tilts forward about the lower end, and the top plate 2 moves forward and is folded along the front leg 3, and the front leg 3 is held with the release lever 9. When laying on the ground, the workbench 1 is placed in the folding position B, and when the release lever 9 is released, the workbench 1 is brought into a folding lock state.

  In order to change to the use posture A, the release lever 9 is rotated (in the direction of arrow S) from the horizontal folding lock state to release the lock, and is lifted while holding the release lever 9, and the front leg 3 and the rear leg 4 After the lower end is grounded, while further raising the top plate 2, one of the front leg 3 or the rear leg 4 is moved in the front-rear opening direction with respect to the other, and the end face member 3C at the upper end of the front leg 3 is received by the connector 14. At the point of contact with the holding surface 14a, the lock pin 7 may be engaged with the lock pin hole 19a by releasing the hand from the release lever 9.

FIG. 9 shows a modification of the lock mechanism 5. The lock mechanism 5 is arranged in a pair on the left and right sides of the top plate 2, and the left and right parallel portions 7c have extension portions 7f protruding inward in the left-right direction. Then, both ends of the interlocking member 11 made of pipe are slidably fitted to the left and right extension 7f, and the left and right release lever 9 is connected.
Both ends of the interlocking member 11 are fitted to the parallel portion 7c, and a notch 11a is formed from the end surface in order to avoid interference with the second bent portion 7d.

  The lock mechanism 5 of the modified example stands at the front or side of the work table 1, holds the interlocking member 11 and moves outward and upwards, so that both the left and right release levers 9 are simultaneously directed downward and upward with respect to the top plate 2. From the posture, it can be turned upward and outward (in the direction of arrow S). At this time, the extension portion 7f moves relative to the interlocking member 11, whereby the left / right release lever 9 is allowed to move in the pin axis direction. Are rotated simultaneously.

In the present invention, the shape of each member and the positional relationship between the front, back, left, right, and top in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the lock mechanism 5 can be applied to what is called a foldable scaffolding platform, a platform or the like. The opening leg angle in the use posture A may be the same for the front leg 3 and the rear leg 4.

DESCRIPTION OF SYMBOLS 1 Folding work table 2 Top plate 3 Front leg 4 Rear leg 5 Lock mechanism 6 Support material 7 Lock pin 8 Energizing means 9 Release lever 10 Pin retraction means 11 Interlocking member A Usage posture B Folding posture

Claims (4)

The upper ends of the front and rear legs (3, 4) are foldably connected to the front and rear end portions of the top plate (2), and the top plate is placed between the front end portion of the top plate (2) and the upper end portion of the front leg (3). (2) is provided with a locking mechanism (5) for locking both the horizontal use posture (A) and the folding posture (B) for folding the front leg (3) with respect to the top plate (2);
The lock mechanism (5) includes a support member (6) fixed to the top plate (2), and is supported by the support member (6) so as to be slidable in the left-right direction. A possible lock pin (7) and biasing means (8) for biasing the lock pin (7) in the protruding direction;
The lock pin (7) has a release lever (9) for rotating the lock pin (7) around the pin axis, and the release lever (9) is provided between the support member (6) and the release lever (9). Pin retraction means (10) is provided for sliding the lock pin (7) against the urging means (8) by rotating outward with respect to the top plate (2). Folding workbench.   The pin retracting means (10) of the lock mechanism (5) is formed on the support member (6) so as to be able to contact the release lever (9), and the rotation of the release lever (9) is moved in the pin axis direction. The folding work table according to claim 1, wherein the folding work table is a cam portion (6 </ b> A) to be converted into a cam.   The locking mechanism (5) is located on at least one side of the left and right sides of the top plate (2). In the use posture (A), the release lever (9) is moved from the locked lock pin (7) to the top plate (2). The folding workbench according to claim 1 or 2, wherein the folding workbench is in an outwardly downward posture and is rotatable outwardly.   The locking mechanism (5) is located on the left and right sides of the top plate (2), and the interlocking member (11) rotates the left / right release lever (9) simultaneously while allowing the release lever (9) to move in the pin axis direction. The folding work table according to claim 1, wherein the folding workbench is connected.

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