JP7332340B2 - Locking device for folding worktables - Google Patents

Description

The folding structure of the present invention is located at both ends of the top plate, and is pivotally connected between the open leg posture in which the legs are vertically installed downward and the closed leg posture in which the legs are retracted under the top plate. The present invention relates to a locking device for locking the legs of a type workbench in an unrotatable position in an open-leg posture.

Conventionally, foldable workbenches have been constructed to facilitate transportation and storage by storing the legs in a closed position.

However, when the workbench is used for work with the legs in the open-leg posture, if there is a risk that the legs may inadvertently turn toward the closed-leg posture, the top board may tilt or fall, resulting in a fall accident for the worker. Locking devices have been proposed for locking the legs so that they cannot swivel in the open-leg position.

Japanese Patent No. 3030253 Japanese Patent No. 3574391

Conventionally, the locking device uses a spring to elastically urge a lock pin toward a rotating plate that rotates integrally with the leg, and rotates the leg from the closed-leg posture toward the open-leg posture, When the leg-opening lock hole of the rotating plate faces the lock pin, the lock pin is automatically inserted and locked into the leg-opening lock hole.

By the way, when folding the legs, it is necessary to turn toward the closed-leg posture after releasing the locked state in the open-leg posture. However, it is not always easy to manually move the lock pin against the spring and retract it from the leg lock hole, and it is troublesome to operate the lock pin under the top plate. is. In particular, if a strong spring is used to prevent the risk of accidental unlocking during work, the operator will have to work hard.

The present invention relates to the locking device of a folding workbench, and provides an unlocking operation device, especially when the workbench is turned upside down to unlock the legs for folding, that is, To provide a device capable of easily and easily unlocking only by stepping on a top plate with the foot of a worker while the top plate is placed on the ground with the lower surface facing upward. As a result, the operator can freely use both hands, so that when the lock is released by stepping on the leg, the leg can be easily folded by using both hands at the same time.

Therefore, the first means of the present invention is to position the legs in the longitudinal direction X and the lateral direction Y of the top plate at the ends of both ends in the longitudinal direction X so that the legs are hung downward. In a folding workbench provided with a pivoting device that pivots freely between an open leg posture (P1) that is set up and a closed leg posture (P2) that is stored under the top plate, the legs are opened. A locking device that locks the legs so that they cannot turn in the leg posture (P1) and a release operation device that releases the lock are provided. It consists of a fixed plate and a pair of rotating plates fixed to the legs, and the rotating plates are rotatably connected in a state where they are superimposed on the fixed plate. At least one rod positioned on the side and directed in the lateral direction Y and elastically biased in the axial direction toward the rotating plate by a spring, and the leg-opened posture (P1). The opening leg lock hole is provided in the rotating plate so as to be positioned on the axis of the rod. A position where the leg is inserted and locked into the lock hole is defined as a lock position (L1), and a position where the lock part is retracted from the leg opening lock hole is defined as an unlock position (L2). A pedestal fitting fixed to the lower side of the top plate and provided with a support bracket and a pivot bracket adjacent in the longitudinal direction X, and a state in which the bottom surface of the top plate faces upward while being pivotally attached to the pivot bracket The rod is provided with an inclined shaft portion that is inclined between the main body shaft portion and a base shaft that is axially movably inserted through the support bracket. The pedal means includes a driving portion that abuts on the inclined shaft portion of the rod. When the rod is moved to the lock position (L1) by the spring, the inclined shaft portion pushes the driving portion to support the footboard. When the tread plate is held at the standby position (Q1) spaced apart from the bracket and stepped on to the operating position (Q2) where the tread plate is supported by the support bracket, the drive unit pushes the tilt shaft portion in the tilt direction to unlock the rod. The point is that it comprises an interlocking drive mechanism for moving to the lock position (L2) .

In addition, the second means of the present invention is provided with respect to the longitudinal direction X and the transverse direction Y of the top plate, and is located at the end edge of both ends in the longitudinal direction X, and the legs are hung downward. In a folding workbench provided with a pivoting device that pivots freely between an open leg posture (P1) that is set up and a closed leg posture (P2) that is stored under the top plate, the legs are opened. A locking device that locks the legs so that they cannot turn in the leg posture (P1) and a release operation device that releases the lock are provided. It consists of a fixed plate and a pair of rotating plates fixed to the legs, and the rotating plates are rotatably connected in a state where they are superimposed on the fixed plate. A pair of rods located on the side and arranged in series in the lateral direction Y and elastically biased in the axial direction toward the rotating plate by a spring, and each rod when the legs are in the open posture (P1) With respect to the axial movement of the rod, the position where the lock portion at the tip of the rod is inserted and locked into the leg lock hole The locking position (L1) is set, and the unlocked position (L2) is set to a position where the locking part is retracted from the leg lock hole, and the unlocking device is fixed to the lower side of the top plate. A pedestal metal fitting provided with a support bracket and a pivot bracket adjacent to each other in the longitudinal direction X, and a footboard which is pivotally attached to the pivot bracket and rotated by stepping on the top plate with the lower surface facing upward. each of the pair of rods has an inclined shaft portion inclined between a base shaft axially movably inserted through the support bracket and the body shaft portion; has a pair of drive parts that abut against the inclined shaft parts of a pair of rods, and when the rods are moved to the lock position (L1) by a spring, the inclined shaft parts push the drive parts, thereby separating the treadle from the support bracket. When the tread plate is stepped on to the operating position (Q2) where the tread plate is connected to the support bracket, the drive unit pushes the tilt shaft portion in the tilt direction, thereby moving the rod to the unlock position (Q1). L2) is configured with an interlocking drive mechanism .

According to a preferred embodiment of the present invention, the top plate has both side walls of height H extending in the longitudinal direction X, and a beam wall extending in the longitudinal direction X from the bottom surface between the side walls. In this configuration, a rod constituting the locking device includes a body shaft portion that is inserted through the side wall of the top plate, a base shaft portion that rides on the beam wall, and is inclined between the body shaft portion and the base shaft portion. An inclined shaft portion is formed, and the release operation device is composed of a pedestal metal fitting fixed to the beam wall and pedal means pivotally attached to the pedestal metal fitting. and a pivot bracket arranged adjacent to the top plate from the support bracket in the longitudinal direction X, wherein the pedal means is rotatably pivoted on the pivot bracket. and a tread plate that moves forward and backward with respect to the support bracket by the rotation of the tread plate. The shaft portion and the driving portion constitute the interlocking driving means, and when the rod is moved to the locking position L1 by the spring, the inclined shaft portion pushes the driving portion, thereby holding the footboard at the standby position Q1 separated from the support bracket. When the tread plate is stepped on to the operating position Q2 at which the support bracket is supported, the drive portion pushes the tilt shaft portion in the tilt direction, thereby moving the rod to the unlock position L2.

At this time, it is preferable that the pedestal metal fitting has leg pieces extending from both sides thereof, the leg pieces coming into contact with the lower surface of the top plate.

According to the present invention, it is possible to provide an unlocking device for unlocking a locking device in a folding workbench. Therefore, when releasing the lock for folding the legs, the unlocking operation device is designed so that the workbench is installed upside down, that is, with the bottom surface of the top plate facing upward, and the operator simply steps on the workbench. The lock can be easily and easily released with the , and it is excellent in workability. In particular, this leaves the operator free to use both hands, so that the leg can be easily folded by using both hands at the same time as the lock is released by stepping on the foot.

1 is a perspective view showing an example of a folding workbench provided with a locking device and an unlocking device according to one embodiment of the present invention; FIG. The workbench is shown, (A) is a front view of the workbench with the legs in the open-leg posture, (B) is a front view of the workbench during the leg-closing work, and (C) is the leg in the closed-leg posture. It is a front view of a workbench. FIG. 4 is a perspective view showing a state in which the lock device is disassembled with respect to one end edge of the top plate. FIG. 4 is a perspective view showing a state in which the locking device is disassembled with respect to the other gable side edge of both ends of the top plate. FIG. 4 is a perspective view showing a disassembled state of the release operation device with the lower surface of the top plate facing upward; It is a perspective view which expands and shows the disassembled state of a release operation device. FIG. 10 is a perspective view showing a state before the base metal fitting of the release operation device is fixed to the beam wall and the pedal means is pivotally attached, with the lower surface of the top plate facing upward; FIG. 4 is a perspective view showing a state in which the release operation device is assembled with the lower surface of the top plate facing upward; 3A and 3B show the operation of the release operation device when it is not operated, and FIG. 4A is a central longitudinal sectional view, and FIG. Regarding the operation of the release operation device, it shows the state when it is operated, (A) is a central longitudinal sectional view, (B) is a sectional view along the BB line, and (C) is a sectional view showing the operation of the interlocking drive means. is.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

(One example of a workbench)
A folding workbench for carrying out the locking device and operating device of the present invention is a general-purpose workbench that includes a wide variety of types used for high-place work at construction sites and the like. An example of this is shown in FIGS. 1 and 2, but it should be understood that the illustration is not limiting.

In the case of the figure, the workbench 1 has both ends in the longitudinal direction X with respect to the longitudinal direction X and the transverse direction Y of the top plate 2, and both sides in the transverse direction Y are the girder side. Edges 4L and 4R are located at the ends 3L and 3R, and the legs 5L and 5R are placed downward in an open leg posture P1, and a closed leg posture P2 is stored below the top plate 2. A pivot connection is provided for pivotally connecting between the.

In the following description, when the left and right gable-side edges 3L and 3R are not particularly distinguished, they may simply be referred to as the gable-side edge 3, and when the left and right girder-side edges 4L and 4R are not particularly distinguished, , may be simply referred to as a girder side edge 4 .

As shown in FIGS. 3 and 5, the top plate 2 includes a center plate 2a and side plates 2b, 2b arranged in parallel in the transverse direction Y, and the side plates 2b, 2b are arranged in a row. The girder side edge portion 4 is composed of both side walls 6, 6 having a height H. As shown in FIG.

The center plate 2a has a center beam wall 7 located in the center in the transverse direction Y and protruding from the bottom surface, and intermediate beam walls 8, 8 located on both sides of the center plate 2a and projecting from the bottom surface in the longitudinal direction Y. deferred. These beam walls 7 and 8 are formed to have the same height H as the side wall 6, the central beam wall 7 is formed to have a T-shaped cross section, and a strip-shaped plate portion 7a is arranged on the lower side of the top plate 2. be.

Both ends of the top plate 2 in the longitudinal direction X are covered with end cap members 9 to form the end edge portions 3 .

The legs 5L and 5R are each formed in a multistage ladder shape by connecting a pair of column legs 5a and 5a with a tread 5b. It is rotatably pivoted on both sides. In the following description, the left and right legs 5L and 5R may be simply referred to as the leg 5 unless otherwise distinguished.

(pivoting device and locking device)
The pivoting device 10 is provided between the four corners of the top plate 2 and the column base 5a. In the illustrated embodiment, as shown in FIGS. 3 and 4, a pivot device 10L is provided between both sides of one leg 5L and the end edge 3L to enable leg opening and closing locks. and between the other leg 5R and the end edge 3R, there is provided a pivoting device 10R that allows only open leg locking, two types of pivoting devices 10L, 10R and corresponding Locking devices 11L and 11R are provided.

(Configuration of leg lock)
These types of pivot devices 10L, 10R and locking devices 11L, 11R generally have in common the configuration for leg-spread locking. Therefore, when the left and right pivoting devices 10L and 10R are not distinguished, they are simply referred to as the pivoting device 10, and when the left and right locking devices 11L and 11R are not distinguished, they are simply referred to as the locking device 11. As a result, the common component parts will be described with the same reference numerals as in FIG. 3 and FIG.

The pivoting device 10 comprises a pair of fixed plates 12 fixed to both sides of the gable edge 3 of the top plate 2 and a pair of rotating plates 13 fixed to the upper end of the column base 5a of the leg 5. The rotating plates 13 are superimposed on the outside of the fixed plate 12 and are rotatably connected by a pivot 14 . As a result, the leg 5 is pivotally connected to the tabletop 2 so as to be rotatable between the open-leg posture P1 and the closed-leg posture P2.

The locking device 11 includes a pair of rods 15, 15 arranged in series in the lateral direction Y and located below the top plate 2, and the leg 5 is placed in a position where the legs 5 are in the open leg posture P1 about the pivot 14. It consists of a leg lock hole 16 provided in the rotary plate 13 so as to be positioned on the axis of the rod 15 when turned.

The rod 15 is inserted through a shaft support hole formed in the intermediate beam wall 8 and the side wall 6 of the top plate 2 and is supported so as to be axially movable. is spring-biased. The tip of the rod 15 is a lock portion 15a, and the position where the lock portion 15a inserted from the positioning hole 18 of the fixing plate 12 is inserted into and locked into the leg lock hole 16 is called the lock position L1, and the lock portion 15a is retracted from the open leg lock hole 16 to be the unlocked position L2, and is normally elastically held at the locked position L1 by the spring 17. By operating a release operation device to be described later, It is moved against the spring 17 to the unlock position L2.

When the leg 5 is rotated to separate the leg opening lock hole 16 from the positioning hole 18 with the rod 15 at the unlock position L2, the rod 15 elastically biased by the spring 17 rotates the lock portion 15a. It is in elastic contact with the inner surface of the plate 13 .

Therefore, when the folded leg 5 is pivoted and unfolded to assume the leg-opening posture P1, as soon as the leg-opening lock hole 16 of the rotating plate 13 is aligned with the positioning hole 18 of the fixed plate 12, the rod 15 is opened. The lock portion 15a is inserted and locked into the leg-opening lock hole 16, and the leg-opening lock is automatically performed.

The leg opening lock described above is a common configuration for the left and right pivot devices 10L and 10R and the left and right lock devices 11L and 11R. Also, a leg closing lock hole 19 is provided in the rotating plate 13 so that the leg closing lock can be automatically performed. That is, when the leg 5L is turned to the closed leg position P2, the closed leg lock hole 19 of the rotary plate 13 is aligned with the positioning hole 18, and the locking portion 15a of the rod 15 is inserted and locked into the closed leg lock hole 19. be.

Therefore, as shown in FIG. 2(A), when the legs 5L and 5R are in the open-leg posture P1, the legs 5L and 5R of the workbench 1 are locked by the lock devices 11 and 11. As shown in FIG. When folding the legs, as shown in FIGS. 2B and 2C, the leg opening lock of the locking device 11 on both legs 5L and 5R is released so that the right leg 5R assumes the closed leg position P2. After that, the left leg 5L is set to the closed leg posture P2. The right leg 5R is not closed-locked, but the left leg 5L is closed-locked by the locking portion 15a of the rod 15 through the leg-closing lock hole 19. When the workbench 1 is transported in a folded state, the legs 5L and 5R do not turn in the unfolding direction, and can be transported safely.

(Release operation device)
5 to 10 show an unlocking operation device 20 for unlocking by moving the rods 15, 15 of the locking device 11 to the unlocking position L2 from the state in which the legs 5 are open-leg locked. there is

5 to 8, the rod 15 constituting the lock device 11 is attached to the side wall of the top plate 2, including the lock portion 15a at the tip, in order to enable the unlocking device 20 to release the open-leg lock. 6 and the intermediate beam wall 8, a base shaft portion 15c that rides on the strip-shaped plate portion 7a of the center beam wall 7, and a tilted portion between the main body shaft portion 15b and the base shaft portion 15c. A tilted shaft portion 15d is formed.

The release operation device 20 is positioned below the top plate 2 and includes pedal means 21 extending over both of the base shaft portions 15c, 15c of the pair of rods 15, 15, which are arranged to face each other. It is composed of a base metal fitting 22 .

The pedestal metal fitting 22 is formed by bending a metal plate. and a position adjacent to the top plate in the longitudinal direction X from the support bracket 24 (in the illustrated embodiment, it is adjacent to the support bracket on the opposite side of the end edge 3). position).

Furthermore, in the illustrated configuration, the base metal fitting 22 has leg portions 26 extending from both sides of the base plate portion 23 to contact the lower surface of the top plate 2 . Therefore, in a state in which the substrate portion 23 is superimposed on the belt-shaped plate portion 7a and fixed by rivets or the like, both sides of the substrate portion 23 are firmly secured by the leg portions 26 that are in contact with the lower surface of the top plate 2 (central plate 2a). Supported.

In the illustrated embodiment, the base shaft portion 15c of the rod 15 is inserted through the shaft hole of the support bracket 24 in a state where the base metal fitting 22 is attached and fixed to the belt-shaped plate portion a, and the spring receiving portion 27 provided in the base shaft portion 15c is inserted. and the support bracket 24, a spring 17 is interposed. The spring 17 is a compression coil spring, and is inserted onto the base shaft portion 15c to elastically urge the rod 15 toward the lock position L1.

The pedal means 21 is formed by bending a metal plate. A tread plate 30 that moves forward and backward with respect to the support bracket 24 is provided by means of the tread plate 30, and a driving portion 31 that is bent from both sides of the tread plate 30 and abuts on the inclined shaft portion 15d of the rod is provided. In the illustrated example, the driving portion 31 forms a curved surface 31a at the leading edge portion of the driving portion 31 by folding the extended end portion of the metal plate bent from the tread plate 30 into a U shape and overlapping them.

As shown in FIGS. 8 to 10, the pedal means 21 has a pivot piece 29 pivoted to a pivot bracket 25, and a footboard 30 is placed over the pair of support brackets 24, 24 and base shafts 15c, 15c. The driving portions 31, 31 are brought into contact with the inclined shaft portions 15d, 15d.

Therefore, when the rods 15, 15 are moved to the lock position L1 by the spring 17, the pedal means 21 is pushed by the inclined shaft portions 15d, 15d, thereby causing the driving portions 31, 31 to be pushed. As shown in 9, the footboard 30 is positioned and held at a standby position Q1 separated from the support brackets 24,24. In this state, as shown in FIG. 8, the footboard 30 maintains an inclined posture with an angle θ toward its tip. Although not shown, it is preferable to provide stopper means for preventing rotation of the pedal means 21 in a direction increasing the angle .theta. from the standby position Q1.

With the workbench 1 installed upside down, that is, with the lower surface of the tabletop 2 facing upward, the operator steps on the pedal means 21 with the sole of the foot (shoe sole) to release the release operation device 20. It is configured for the purpose of releasing the leg lock.

Therefore, the operator can simply and easily unlock the locking device 11 that locks the legs 5 in the open-leg posture P1 simply by stepping on the soles of the feet (soles). Since the operator can freely use both hands, he/she can easily fold the legs 5 to the closed posture P2 by using both hands at the same time as releasing the lock by trampling.

As described above, in the illustrated embodiment in which the leg closing lock device is configured by the leg closing lock hole 19 for one leg 5L, the unlocking operation device 20 locks the leg while the leg 5L is in the leg closing posture P2. It can also be used to unlock the rod 15 inserted and locked in the hole 19 .

When the operator steps on the footboard 30 of the pedal means 21 held at the standby position Q1, the footboard 30 rotates around the pivot 28 in the direction of decreasing the angle θ, and as shown in FIG. is connected to the support brackets 24, 24 as the operating position Q2. That is, the support bracket 24 constitutes a stopper 24a that stops the footboard 30 at the operating position Q2. While the footboard 30 is thus rotated from the standby position Q1 to the operating position Q2, the driving portion 31 slides and pushes along the inclination of the inclined shaft portion 15d, thereby moving the rod 15 from the lock position L1. Move to unlock position L2. Accordingly, the locking portion 15a of the rod 15 is retracted from the leg-opening lock hole 16, and the leg-opening lock is released.

More specifically, as shown in FIG. 10C, the driving portion 31 is moved from the axis A1 of the base shaft portion 15c of the rod 15 toward the axis A2 of the body shaft portion 15b, and the curved surface 31a is inclined. Since the rod 15d smoothly slides along the inclination of the shaft portion 15d, the inclined shaft portion 15d is pushed to move the rod 15 toward the unlock position L2 against the spring 17. As shown in FIG.

As for the pedal means 21 which receives the pedaling force of the sole of the operator, the metal base 22 is firmly supported on the lower surface of the top plate 2 by the leg pieces 26, 26. Even if the aluminum material is formed into a thin plate shape, it does not cause deformation of the aluminum material, withstands a strong pedaling force, and maintains a stable mounting and fixing state.

When the pedal means 21 is released from the pedaling force of the operator, the driving portion 31 is pushed by the inclined shaft portion 15d of the rod 15 which moves toward the lock position L1 by the spring 17, and the inclined shaft portion 15d is inclined. It is rotated while moving along and returns to the standby position Q1.

In this manner, the driving portion 31 of the footboard 30 and the inclined shaft portion 15d of the rod 15 constitute the interlocking driving means 32. The interlocking driving means 32 moves the footboard 30 of the pedal means 21 to the standby position Q1. to the operating position Q2, the rod 15 is moved from the locked position L1 to the unlocked position L2, and when the stepping force is released, the rod 15 is moved from the unlocked position L2 to the locked position L1 by the spring 17. The tread plate 30 is configured to be able to turn and return from the operating position Q2 to the standby position Q1.

In the illustrated embodiment, a pair of rods 15, 15 arranged in series in the lateral direction Y, a pair of pivot devices 10 provided on both sides of the gable side edge 3 and on the two column legs 5a, 5a, Locking devices 11, 11 are configured on both sides in the transverse direction Y by means of 10 leg-opening lock holes 16, and a pair of rods 15, 15 are simultaneously unlocked by one pedal means 21 in the release operation device 20. However, it is not limited to such a configuration. Since the leg 5 is formed in a ladder shape by integrating two column legs 5a, 5a, for example, one rod 15 out of a pair of rods can position the leg 5 on one side in the lateral direction Y. The locking device 11 may be configured only for the pivoting device 10 of the column base 5a, and the locking device 11 may be configured to be unlocked by the unlocking device 20. FIG.

1 Workbench 2 Top plate 2a Center plate 2b, 2b Side plates 3, 3L, 3R End edge 4, 4L, 4R Girder side edge 5, 5L, 5R Leg 5a Column base 5b Tread 6, 6 Side walls 7 central beam wall 7a band-shaped plate portion 8 intermediate beam wall 9 end cap members 10, 10L, 10R pivoting device 11, 11L, 11R locking device 12 fixed plate 13 rotating plate 14 pivot shaft 15 rod 15a lock portion 15b body shaft portion 15c Base shaft portion 15d Inclined shaft portion 16 Leg opening lock hole 17 Spring 18 Positioning hole 19 Leg closing lock hole 20 Release operation device 21 Pedal means 22 Base metal fitting 23 Base plate portion 24 Support bracket 24a Stopper 25 Pivot bracket 26 Leg piece portion 27 Spring receiver Part 28 Pivot 29 Pivot piece 30 Footboard 31 Drive part 31a Curved surface 32 Interlocking drive means

Claims (4)

With respect to the longitudinal direction X and the lateral direction Y of the top plate, the legs are positioned at the gable side edges of both ends of the top plate in the longitudinal direction X, and the open leg posture (P1) in which the legs are hung downward and the bottom side of the top plate A foldable workbench provided with a pivot device (10) that is pivotally connected between the closed leg posture (P2) stored in the foldable workbench, and a lock that locks the legs so that they cannot be rotated in the open leg posture (P1) A device (11) and a release operation device (20) for releasing the lock are provided,
The pivoting device (10) is composed of a pair of fixed plates (12) fixed to both sides of the gable edge of the top plate and a pair of rotating plates (13) fixed to the legs. The rotating plate is rotatably connected to the fixed plate while being superimposed on the fixed plate,
The locking device (11) is located below the top plate and is arranged in the lateral direction Y, and is elastically biased in the axial direction toward the rotating plate by a spring (17). At least one rod (15) and a leg-spread lock hole (16) provided in the rotating plate (13) so as to be positioned on the axis of the rod when the leg-spread posture (P1) is taken,
With respect to the axial movement of the rod, the lock position (L1) is defined as the position where the lock portion (15a) provided at the tip of the main shaft portion (15b) of the rod is inserted and locked into the leg lock hole (16). The position where the part (15a) is retracted from the leg lock hole (16) is configured to be the unlocked position (L2),
The release operation device (20) includes a pedestal fitting (22) fixed to the lower side of the top plate and provided with a support bracket (24) and a pivot bracket (25) adjacent to each other in the longitudinal direction X; Composed of a pedal means (21) equipped with a step plate (30) pivotally attached to a pivot bracket (25) and rotated by stepping on the top plate with the lower surface of the top plate facing upward,
The rod (15) has an inclined shaft portion (15d) inclined between a base shaft (15c) axially movably inserted through the support bracket (24) and the body shaft portion (15b). ,
The pedal means (21) includes a drive portion (31) that abuts against the inclined shaft portion (15d) of the rod, and when the rod is moved to the lock position (L1) by a spring, the inclined shaft portion (15d) is brought into contact with the drive portion. By pushing (31), the footboard (30) is held at the standby position (Q1) away from the support bracket (24), and the footboard (30) is in the operating position (Q1) where the footboard (30) is supported by the support bracket (24). The interlocking drive mechanism (32) moves the rod to the unlock position (L2) by pushing the tilting shaft (15d) in the tilting direction when the rod is stepped on to Q2). A locking device in a folding workbench characterized by: With respect to the longitudinal direction X and the lateral direction Y of the top plate, the legs are positioned at the gable side edges of both ends of the top plate in the longitudinal direction X, and the open leg posture (P1) in which the legs are hung downward and the bottom side of the top plate A foldable workbench provided with a pivot device (10) that is pivotally connected between the closed leg posture (P2) stored in the foldable workbench, and a lock that locks the legs so that they cannot be rotated in the open leg posture (P1) A device (11) and a release operation device (20) for releasing the lock are provided,
The pivoting device (10) is composed of a pair of fixed plates (12) fixed to both sides of the gable edge of the top plate and a pair of rotating plates (13) fixed to the legs. The rotating plate is rotatably connected to the fixed plate while being superimposed on the fixed plate,
The locking device (11) is positioned below the top plate and arranged in series in the lateral direction Y. A pair of locking devices (11) are elastically biased toward the rotating plate in the axial direction by a spring (17). rods (15, 15) and a leg lock hole (16) provided in the rotating plate (13, 13) so as to be positioned on the axis of each rod when the leg is in the open position (P1). is,
With respect to the axial movement of the rod, the lock position (L1) is defined as the position where the lock portion (15a) provided at the tip of the main shaft portion (15b) of the rod is inserted and locked into the leg lock hole (16). The position where the part (15a) is retracted from the leg lock hole (16) is configured to be the unlocked position (L2),
The release operation device (20) includes a pedestal fitting (22) fixed to the lower side of the top plate and provided with a support bracket (24) and a pivot bracket (25) adjacent to each other in the longitudinal direction X; Composed of a pedal means (21) equipped with a step plate (30) pivotally attached to a pivot bracket (25) and rotated by stepping on the top plate with the lower surface of the top plate facing upward,
The pair of rods (15) each have an inclined shaft portion (15d) inclined between a base shaft (15c) inserted axially movably through the support bracket (24) and the body shaft portion (15b). is provided,
The pedal means (21) includes a pair of driving portions (31) that abut against the inclined shaft portions (15d) of the pair of rods, and when the rods are moved to the lock position (L1) by the springs, the inclined shaft portions (15d) are closed. pushes the driving portion (31) to hold the footboard (30) at the standby position (Q1) separated from the support bracket (24), and the footboard (30) is supported by the support bracket (24). The interlocking drive mechanism (32) moves the rod to the unlock position (L2) by pushing the tilting shaft (15d) in the tilting direction when the pedal is depressed to the operating position (Q2). A locking device for a folding workbench, characterized in that it consists of: The top plate has both side walls (6, 6) with a height H extending in the longitudinal direction X, and a beam wall (8) projecting from the bottom surface between the both side walls and extending in the longitudinal direction X. In the configuration
The rod (15) constituting the lock device (11) includes a body shaft portion (15b) inserted through the side wall (6) of the top plate, a base shaft portion (15c) that rides on the beam wall (8), A tilted shaft portion (15d) tilted between the body shaft portion and the base shaft portion is formed,
The release operation device (20) comprises a base metal fitting (22) fixed to the beam wall (8) and pedal means (21) pivotally attached to the base metal fitting,
The pedestal metal fitting (22) includes a support bracket (24) through which the base shaft portion (15c) of the rod is axially movably inserted, and a pivot bracket arranged adjacent to the support bracket in the longitudinal direction X of the top plate. (25),
The pedal means (21) includes a pivot piece (29) rotatably pivoted on the pivot bracket (25), and a pivot piece (29) which advances and retreats with respect to the support bracket (24) as the pivot piece rotates. A moving tread plate (30) is provided, and the tread plate is provided with a driving portion (31) that contacts the inclined shaft portion (15d) of the rod,
The tilt shaft portion (15d) and the drive portion (31) constitute the interlocking drive mechanism (32), and when the rod is moved to the lock position (L1) by the spring, the tilt shaft (15d) portion moves toward the drive portion (31). to hold the tread (30) at the standby position (Q1) separated from the support bracket (24), and then step down to the operating position (Q2) where the tread (30) is in contact with the support bracket (24). In this case, the driving part (31) pushes the tilting shaft part (15d) in the tilting direction to move the rod to the unlocking position (L2). A locking device in a folding workbench according to . 4. A locking device for a folding workbench according to claim 3, wherein said base fitting (22) has leg pieces (26) extending from both sides thereof to abut against the lower surface of the top plate.

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