JP6851898B2 - Caster device on the workbench - Google Patents

Description

The present invention relates to a caster device in which a foldable workbench can be easily moved in a folded state.

Conventionally, for convenience when moving a foldable workbench in a folded state, those provided with casters have been proposed.

Japanese Unexamined Patent Publication No. 2003-239527

In the workbench proposed by Patent Document 1, when casters are attached to the inside of the lower ends of the legs constituting the ladder frame and the workbench is tilted with respect to the ground with the legs folded, the casters It is configured to face the ground.

Therefore, there is an advantage that the operator can easily move the caster by towing the folded workbench while rolling the caster on the ground.

However, since the casters are always attached so as to project inward from the legs, there are various problems.

For example, when working at heights, the casters project from the legs near the ground with the deployed legs installed on the ground, which may cause the operator or other person to trip over and overturn the workbench. ..

In addition, when storing the workbench when not in use, the casters protrude from the legs even when the workbench is folded, so it is difficult to stack multiple workbenches in a stable state, and the protrusions. There is a risk that the casters will collide with foreign matter and be damaged.

Therefore, in the present invention, the caster is set to the protruding posture when necessary, but can be satisfactorily stored as the storage posture when it is not necessary, and the posture can be easily changed between the protruding posture and the storage posture. An object of the present invention is to provide a caster device configured so that a protruding caster can maintain a good protruding posture even when a load of the workbench is received while the folded workbench is moving.

Therefore, where the present invention is configured as a means, the legs are provided near the four corners of the top plate so that the legs are vertically hung from the top plate so as to overlap the lower side of the top plate. In a workbench provided with a pivoting mechanism that allows the posture to be changed freely between the retracted folding postures, a caster formed by pivotally supporting a wheel on a shaft support member and a side edge of the caster on the lower side of the top plate. Between the storage posture stored in the inner space from the portion and the protruding posture protruding from the side edge portion to the outer outer space, the shaft support member is set to a downward posture and the ground contact surface of the wheel from the shaft support member. A caster support mechanism that allows the posture to be freely changed by moving the caster forward and backward while being exposed in the protruding direction, a storage posture holding means that holds the caster in the retracted posture , and the shaft branch with the caster in the protruding posture. The point is that a protruding posture holding means for locking and holding the material in a state of being swiveled from a downward posture to an upward posture is provided.

Preferably, the caster support mechanism includes a slider extending from a shaft support member of the caster in the advancing / retreating movement direction, and a holder for slidably holding the slider under the top plate, and the slider and the holder. A spring for elastically urging the caster in the direction in which the caster is in the retracted posture is provided between the two, the spring constitutes the retracted posture holding means, and the caster is projected by moving the slider against the spring. when said upward posture as well as the orientation, it is configured so as to hold the attitude by the projecting posture holding means.

In a preferred embodiment of the present invention, the slider is slidably and rotatably held by the holder, and the shaft support member of the caster is fixed in a state of projecting to the side of the slider. The ground contact surface of the wheel is exposed in the projecting direction, and by sliding the slider, the caster is moved between the retracted posture and the protruding posture, and by rotating, the shaft branch is centered on the slider. The material is configured to rotate between a downward posture and an upward posture, and the protruding posture holding means is formed by a locking portion provided on the shaft support member, and the shaft is in a state where the caster is in the protruding posture. When the support member is in the upward posture, the locking portion is locked to the side edge portion of the top plate, and when the shaft support member is in the downward posture, the locking portion is separated from the side edge portion of the top plate. are doing.

A detent means for locking the slider and the holder in a slidable state so as not to rotate is provided between the slider and the holder, and the detent means releases the lock when the caster is in the protruding posture. The slider is configured to be rotatable by this.

Preferably, the side edge portion of the top plate includes a side end surface bent downward from the upper surface of the top plate, and a side lower surface bent from the side end surface toward the internal space, and the side end surface and the side end surface. An acute-angled bending angle θ1 is formed between the lower surfaces of the sides, and the locking portion of the shaft support member constituting the protruding posture holding means is described when the caster is in the protruding posture and the shaft support member is in the upward posture. It includes a first locking portion that locks on the side end surface and a second locking portion that locks on the lower surface of the side.

More preferably, in a workbench in which a lower surface on the side facing the internal space is provided on the lower side of the side edge portion of the top plate, an operation piece is provided on the side portion of the shaft support member, and the operator holds the operation piece. By gripping , when the shaft support member is turned from the downward posture to the upward posture while the caster is in the protruding posture, the side surface of the operation piece constitutes a stopper that abuts on the lower surface of the side.

According to the present invention, the caster 12 can be held in the retracted posture P1 when the legs of the workbench 1 are used for aerial work in the unfolded posture or when the workbench 1 is folded and stored. Therefore, when the workbench 1 is used to work at a high place, the worker's feet do not get caught in the casters 12, and the work can be performed safely.

On the other hand, when the workbench 1 is moved according to the work place, or when the workbench 1 is moved from the work place to the storage place, the caster 12 is held in the protruding posture P2 with respect to the folded workbench 1. Then, by rolling the wheel 14 on the ground, there is an advantage that the workbench, which is regarded as a heavy object, can be easily moved.

According to the present invention, the structure for changing the posture of the caster 12 between the retracted posture P1 and the protruding posture P2 is simple, the operability is extremely good, and further, the protruding posture P2 is used. When moving the folded workbench on the ground, the load of the heavy workbench is preferably supported, and even if a load or torque acts on the wheels 14 due to a change in the moving direction during movement or the like. There is an effect that the shaft support member 13 preferably withstands the posture, does not lose its posture, and can suitably perform the function as the caster 12.

It is a perspective view which shows an example of the workbench provided with the caster device which concerns on one Embodiment of this invention. The caster device is shown, (A) is a perspective view showing a state in which the caster is projected from the top plate of the workbench, and (B) is a state in which the folded workbench is moved by using the caster. It is a front view which shows. It is a perspective view which shows the state which the lower surface of the top plate faces upward, and shows the caster support mechanism in the disassembled state. It is a perspective view which shows the slider and holder which make up a caster support mechanism in the disassembled state. FIG. 5 is a perspective view showing a state in which the caster is in a retracted posture and the caster and the shaft support member are in a downward posture with respect to the operation of the caster device. FIG. 5 is a perspective view showing a state in which the caster is in a protruding posture and the caster and the shaft support member are in an upward posture with respect to the operation of the caster device. The operation of the caster device is shown, (A) is a perspective view showing a state in which the caster in the retracted posture is held by the retracted posture holding means, and (B) shows a state before turning of the caster in the protruding posture. The perspective view is a perspective view showing a state in which the caster in the protruding posture (C) is held by the protruding posture holding means after turning.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(Example of workbench)
The workbench provided with the caster device of the present invention is a general-purpose workbench widely including various types used for aerial work at construction sites and the like, and therefore its shape and size are particularly limited. Although not a thing, an example thereof is shown in FIG.

In the case of the illustrated example, the workbench 1 is provided with legs 3 near the four corners of the top plate 2, and the legs 3 are vertically hung from the top plate 2 in a downward position and on the lower side of the top plate 2. A pivot mechanism 4 is provided so that the posture can be freely changed between the stored folding postures. In the case of the illustrated example, the top plate 2 is provided with a gable side frame 6 and a gable side frame 7 on the short side and the long side of the flooring material 5 formed in a rectangular plate shape, respectively, and the gable side formed by the respective frames. The edge portion 8a and the girder side edge portion 8b are designated as the side edge portion 8 of the top plate 2.

The leg portion 3 is rotated as shown by an arrow in the drawing via the pivoting mechanism 4, so that the posture can be freely changed between the unfolded posture and the folded posture. It is held by the locking means 9 (see FIG. 3) provided in. A pair of locking means 9 and 9 are provided along the inside of the gable side edge 8a so as to engage and disengage the pair of legs 3 and 3 facing each other at the gable side edge 8a of the top plate 2. It is installed in the gable side frame 6 together with a spring (not shown), and the tip is urged so as to protrude from both ends of the gable side frame 6. The pair of locking means 9 and 9 are provided with the knob portions 9a and 9a by bending the end portions facing each other downward, and both the knob portions 9a and 9a are shown by arrows M in FIG. When it is moved in a direction close to each other, the tip portion is retracted and the legs 3 and 3 are unlocked so that the legs can be rotated.

The pair of legs 3 and 3 facing each other on the gable side edge 8a of the top plate 2 form a ladder leg connected by a treadle 10, and the base end of the clue rod 11 is attached to the upper end of each leg 3. The department is organized. The clue rod 11 is rotatable between an upright posture in which the clue rod 11 stands up from the leg portion 3 toward the upper side of the top plate 2 and a superposed posture in which the clue rod 11 is superposed on the leg portion 3 by reversing from the upright posture. It is held in each posture by the locking means (not shown).

As a result, the workbench 1 can be compactly folded by rotating the ladder leg formed by the leg portion 3 to the lower side of the top plate 2 in a state where the clue rod 11 is polymerized on the leg portion 3. In rare cases, it is configured so that it can be moved, transported, or stored in that state.

As shown in FIG. 2A, the gable side frame 6 includes a side upper surface 6a forming the upper surface of the side edge portion of the top plate 2, a side end surface 6b bent downward from the side upper surface 6a, and the like. A side lower surface 6c that is bent inward from the side end surface 6b is provided, and a vertical line that intersects the bent edges of the side end surface 6b and the side lower surface 6c is defined as a boundary line L, and is below the top plate 2 including the gable side frame 6. On the side, the inside is the internal space S1 and the outside is the external space S2 from the boundary line L.

(Caster device)
As shown in FIG. 2B, the present invention provides a caster device provided with a caster 12 that faces the ground when the workbench 1 is tilted with respect to the ground in a folded state. The caster 12 is configured by pivotally supporting the wheels 14 on the shaft support member 13, so that the operator pulls the folded workbench 1 while rolling the wheels 14 on the ground. Therefore, it can be easily moved. Note that FIG. 2A shows a caster 12 protruding from the gable side edge 8a with the legs 3 in the unfolded posture for convenience of understanding. Originally, the legs 3 are in the unfolded posture. When working at a high place on the workbench 1, it is desirable that the caster 12 is in the retracted posture P1.

The caster 12 is between a storage posture P1 stored in the inner internal space S1 from the side edge 8 on the lower side of the top plate 2 and a protruding posture P2 protruding from the side edge 8 into the outer outer space S2. The posture can be changed freely by moving it forward and backward.

Therefore, the caster device includes a caster support mechanism 15 for enabling such a change in the posture of the caster 12, a storage posture holding means 16 for holding the caster 12 in the storage posture P1, and a protruding posture of the caster 12. The protruding posture holding means 17 for holding the P2 is provided.

The caster device may be arranged so that the caster 12 can be in a retracted posture and a protruding posture with respect to the girder side edge portion 8b of the side edge portion 8 of the top plate 2, as in the illustrated embodiment. , It is preferable to arrange the gable side edge portion 8a so as to allow a retracted posture and a protruding posture, so that the operator can fold while standing on the ground as shown in FIG. 2 (B). Since the folded workbench 1 can be towed, the moving work becomes easy.

Hereinafter, one embodiment of the caster device will be described in detail with reference to FIGS. 3 to 7, but since the lower side of the top plate 2 is shown, the lower side of the top plate 2 is shown upward, and the top plate is indicated by an arrow D. The downward direction of 2 is indicated, and the upward direction of the top plate 2 is indicated by the arrow U.

As shown in FIGS. 3 to 6, the caster support mechanism 15 slidably slides the slider 18 extending from the shaft support member 13 of the caster 12 in the advancing / retreating moving direction and the slider 18 under the top plate 2. It is composed of a holder 19 that is held in.

The slider 18 is formed of a round rod-shaped rod, and is fixed to the side surface of one end of the rod with the shaft support member 13 of the caster 12 protruding laterally, and the wheels are fixed in the protruding direction of the shaft support member 13. The ground plane of 14 is exposed, and a male screw 18a is formed at the other end. Therefore, the wheels 14 and the shaft support member 13 constituting the caster 12 project in the downward posture Pd protruding downward from the slider 18 and in the upward direction U by rotating the slider 18 around the axis of the rod. It is configured to be swiveled between the upward posture Pu.

The holder 19 is formed of a holding member 20 such as a cylindrical body that slidably and rotatably holds the slider 18, and is formed on the lower side of the top plate 2 via a mounting base 21 fixed to the holding member 20. It is attached and fixed by a fixing tool such as a rivet. In the case of the illustrated embodiment, the floor material 5 of the top plate 2 is provided with a rib 5a having a T-shaped cross section on the lower side, and the mounting base 21 is mounted and fixed on the flat plate portion of the rib 5a.

The slider 18 is inserted into the holder 19 with the tip of the rod facing the internal space S1 with the caster 12 facing the external space S2, and the spring 22 composed of a coil spring is removed from the insertion portion of the rod. In the inserted state, the spring receiving member 23 made of a nut is attached to the male screw portion 18a.

Therefore, the spring 22 is compressed between the holder 19 and the spring receiving member 23, and is elastically urged in the direction in which the caster 12 is in the retracted posture P1. The caster 12 is set to the retracted posture P1 by contacting the shaft support member 13 with the holder 19, and the retracted posture P1 is held by the elastic urging force. Therefore, in the case of the illustrated embodiment, the stored posture holding means is provided by the spring 22. 17 is configured.

A detent means 24 for locking the slider 18 in a slidable state so as not to rotate is provided between the slider 18 and the holder 19. In the case of the illustrated embodiment, the anti-rotation means 24 is composed of a protrusion 25 projecting from the side surface of the slider 18 and a slit 26 formed on the side of the holder 19 in the advancing / retreating movement direction of the slider 13. 26 has an opening 26a at the end of the holder 19.

Therefore, when the caster 12 is in the retracted posture P1, the protrusion 25 is locked in the slit 26 to hold the slider 18 non-rotatably and hold the caster 12 in the downward posture Pd. Therefore, the anti-rotation means 24 functions as a posture holding means for holding the caster 12 in the retracted posture P1 as the downward posture Pd.

As shown by a chain line in FIG. 5, when the slider 18 is slid against the spring 22 toward the external space S2 and the caster 12 is in the protruding posture P2, the protrusion 25 escapes from the opening 26a of the slit 26. By releasing the lock, the slider 18 is made rotatable. At this time, the caster 12 is provided with an operation piece 27 on the side portion of the shaft support member 13. Therefore, the operator can easily move the caster 12 toward the protruding posture P2 by grasping the operation piece 27 with his / her fingertip and pulling it toward the external space S2, and further, while holding the operation piece 27. The caster 12 can be swiveled around the axis of the slider 18. In the case of the illustrated example, the operation piece 27 is formed by a rod and has a base portion 27a extending laterally from the shaft support member 13 and a tip portion 27b bent at the tip of the base portion 27a and extending in the axial direction of the slider 18. I have.

Therefore, as shown in FIG. 6, when the caster 12 is turned in the protruding posture P2 to be in the upward posture Pu, the locking portion 28 provided on the shaft support member 13 of the caster 12 is the top plate 2. By locking to the side end surface 6b formed on the gable side edge portion 8a, the spring 22 prevents the caster 12 from returning toward the retracted posture P1. Therefore, the locking portion 28 constitutes the protruding posture holding means 17. At the same time, the locking portion 28 functions as a posture holding means for holding the caster 12 in the protruding posture P2 as the upward posture Pu.

In the case of the illustrated embodiment, as shown in FIG. 4, the side end surface 6b and the side lower surface 6c of the gable side frame 6 constituting the gable side edge portion 8a of the top plate 2 are bent at an acute angle of bending θ1. On the other hand, the locking portion 28 includes a first locking portion 28a that locks to the side end surface 6b and a second locking portion 28b that locks to the side lower surface 6c. Preferably, the angle θ2 between the first locking portion 28a and the second locking portion 28b is configured to match the θ1.

Therefore, by grasping the operation piece 27 with a fingertip, the caster 12 is swiveled in a protruding posture P2, and by setting the upward posture Pu, the first locking portion 28a is opposed to the side end surface 6b. Then, when the operation piece 27 is released from the fingertip, the first locking portion 28a abuts on the side end surface 6b and is locked by the elastic urging force of the spring 22. In this state, the first locking portion 28a and the second locking portion 28b adjacent to each other via the angle θ2 hold the adjacent side end surface 6b and the side lower surface 6c via the bending angle θ1, respectively. Since it is locked, the turning of the caster 12 is preferably prevented, and the state of the protruding posture P2 and the upward posture Pu is maintained.

When the caster 12 is turned from the downward posture Pd to the upward posture Pu, as shown in FIG. 6, the operation piece 27 comes into contact with the side lower surface 6c to form a stopper 29 that regulates the turning position. Therefore, when the operator grips the operation piece 27 and turns the caster 12, there is no risk of erroneous operation of turning the caster 12 beyond the upward posture Pu to an excessive position, and the operability is good.

As shown in FIG. 7, in the caster device of the present invention in which the casters 12 are supported by the caster support mechanism 15, it is preferable to provide two or more sets on the gable side edge portion 8a of the top plate 2. In the case of the illustrated embodiment provided with the two sets of casters 12 and 12, the operation pieces 27 are arranged symmetrically with each other so as to project from the respective casters 12 toward the girder side edge portion 8b of the top plate 2. Is preferable. As a result, as will be described later, when the casters 12 and 12 in the protruding posture P2 are rotated to make the upward posture Pu, the tip portion 27b of the operation piece 27 is positioned at a position where it interferes with the grip portion 9a of the locking means 9. It is arranged and locks the knob portion 9a of the locking means 9 so as to be immovable in the unlocking direction M (see FIG. 7C).

As shown in FIG. 7A, the caster device is used when the legs 3 of the workbench 1 are used for work at a high place in a downwardly deployed posture, or when the legs 3 are folded and stored. 12 can be set to the retracted posture P1 with respect to the top plate 2, and in the case of the illustrated embodiment, it is set to the downward posture Pd. Although not shown, the legs 3 and 3 are folded at both sides of the two sets of caster devices, so that the casters 12 do not protrude beyond the legs 3.

Since the caster 12 holds the stored posture P1 by the stored posture holding means 16 formed by the spring 22, the caster 12 does not accidentally protrude from the gable side edge 8a of the top plate 2. Therefore, when the workbench 1 is used for aerial work, the operator's feet do not get caught in the casters 12. Further, when a plurality of folded workbenches 1 are stored by stacking them, the casters 12 are not crushed between the upper and lower workbenches.

When the workbench 1 is moved according to the work place, or when the workbench 1 is moved from the work place to the storage place, the workbench 1 is folded and the caster 12 is set as the protruding posture P2 as shown in FIG. 2 (B). In addition, the workbench 1 can be tilted with respect to the ground, and the wheels 14 can be moved by rolling on the ground. Since the workbench 1 is entirely made of metal and is a considerably heavy object, being able to move by the casters 12 without the need for lifting greatly contributes to the improvement of the working environment.

In order to change the caster 12 from the retracted posture P1 to the protruding posture P2, as shown in FIGS. 7 (B) and 7 (C), the operation piece 27 was grasped, and the caster 12 was pulled out against the spring 22 and swiveled. After that, it is only necessary to release it from the grip, and the operability is extremely good. In this state, the protruding posture holding means 17 formed by the locking portion 28 holds the caster 12, and the wheels 14 of the caster 12 having the upward posture Pu have the ground contact surface facing the top plate 2 in the upward direction U. Let me face you. Therefore, as shown in FIG. 2B, if the folded workbench 1 is tilted on the ground, the ground contact surface of the wheel 14 is brought into contact with the ground.

When the two sets of casters 12 and 12 in the illustrated embodiment turn from the downward posture Pd to the upward posture Pu, as shown in FIG. 7B, the operating pieces 27 and 27 face each other. It is swiveled in the opposite direction, and after swirling, as shown in FIG. 7C, the tip portion 27b is locked inside the grip portion 9a of the locking means 9, and the grip portion 9a is in the unlocking direction M. Prevent moving towards. That is, the locking means 9 locks the leg portion 3 in a folded state so as not to rotate, and is held by the tip portion 27b so that the lock cannot be released.

Therefore, when the folded workbench 1 is moved by the casters 12, the locking means 9 is not accidentally unlocked by receiving vibration or an external force, so that the legs 3 suddenly rotate in the deployment direction. There is no danger of moving.

Further, when the leg portion 3 is rotated from the folded posture to the deployed posture in order to perform work at a high place by the workbench 1, the lock is released by moving the locking means 9 in the unlocking direction M. However, in order to enable such unlocking, the caster 12 needs to be in the retracted posture P1. That is, since the operator cannot deploy the leg portion 3 without setting the caster 12 in the retracted posture P1, the caster 12 does not cause an unfavorable situation in which the caster 12 protrudes from the top plate 2 during work at a high place. ..

During the movement of the workbench 1, the caster 12 holds the protruding posture P2 by the protruding posture holding means 17, so that the load of the inclined workbench is preferably supported. In the case of the illustrated embodiment, as described above, the first locking portion 28a and the first locking portion 28a of the locking portion 28 provided on the shaft support member 13 are located adjacent to each other with the angle θ1 and the angle θ2 as acute angles. 2 The locking portion 28b is fixed in a stable state while holding the side end surface 6b and the side lower surface 6c of the gable side frame 6. Therefore, even if a load or torque acts on the wheel 14 due to a change in the moving direction while moving on the ground, the shaft support member 13 preferably withstands the posture and does not lose its posture, and functions as a caster 12. Can be preferably fulfilled.

When the caster 12 is changed from the protruding posture P2 to the retracted posture P1 again, if the operation piece 27 is gripped and the caster 12 is slightly moved toward the external space S2 against the spring 22, the locking portion 28 can be moved. Since the lock is released, the caster 12 can be turned so as to be in the downward posture Pd. Therefore, the caster 12 automatically returns to the retracted posture P1 by the spring 22 while the downward posture Pd is held by the anti-rotation means 24 just by releasing the caster 12 from the grip after turning. The sex is extremely good.

1 Worktable 2 Top plate 3 Legs 4 Pivot connection mechanism 5 Floor material 5a Ribs 6 Gable side frame 6a Side upper surface 6b Side end surface 6c Side lower surface 7 Gable side frame 8 Side edge 8a Gable side edge 8b Gable side edge 9 Lock means 9a Operation piece 10 Tread rail 11 Clues rod 12 Caster 13 Shaft support member 14 Wheel 15 Caster support mechanism 16 Storing posture holding means 17 Protruding posture holding means 18 Slider 18a Male screw 19 Holder 20 Holding member 21 Mounting base 22 Spring 23 Spring Receiving member 24 Anti-rotation means 25 Protrusion 26 Slit 26a Opening 27 Operation piece 27a Base 27b Tip 28 Locking 28a First locking 28b Second locking 29 Stopper

Claims (6)

The legs (3) are provided near the four corners of the top plate (2), and the unfolded posture in which the legs are vertically hung from the top plate and the folded posture in which the legs are stored so as to overlap the lower side of the top plate. On a workbench equipped with a pivotal mechanism (4) that allows the posture to be changed freely between them.
A caster (12) formed by pivotally supporting a wheel (14) on a shaft support member (13), and
The storage posture (P1) in which the caster (12) is stored in the inner space (S1) from the side edge portion (8) on the lower side of the top plate (2), and the outside from the side edge portion (8). Between the protruding postures (P2) protruding into the external space (S2) of the above, the shaft support member (13) is set to the downward posture (Pd), and the ground contact surface of the wheels (14) from the shaft support member (13) is described. A caster support mechanism (15) that allows the posture to be changed by moving it forward and backward while it is exposed in the protruding direction.
A storage posture holding means (16) for holding the caster (12) as a storage posture (P1), and
Holding the protruding posture in which the caster (12) is set as the protruding posture (P2) and the shaft support member (13) is locked and held in a state of being swiveled from the downward posture (Pd) to the upward posture (Pu). A caster device on a workbench, characterized in that it is provided with means (17). The caster support mechanism (15) slides the slider (18) extending from the shaft support member (13) of the caster (12) in the advancing / retreating moving direction and the slider under the top plate (2). Equipped with a holder (19) that holds freely
A spring (22) is provided between the slider (18) and the holder (19) to elastically urge the caster (12) in the direction of the retracted posture (P1), and the spring (22) provides the retracted posture. Consists of holding means (16)
When the the upward posture (Pu) as well as to the caster said projecting posture (P2) by moving the slider (18) against the spring, thereby holding the attitude by the projecting posture holding means (17) The caster device in a workbench according to claim 1, wherein the caster device is configured as described above. The slider (18) is slidably and rotatably held by the holder (19), and the shaft support member (13) of the caster (12) is projected toward the side of the slider (18). By sticking in the state, the ground contact surface of the wheel (14) is exposed in the protruding direction.
By sliding the slider (18), the caster (12) is moved between the retracted posture (P1) and the protruding posture (P2), and by rotating, the caster (12) is centered on the slider (18). The shaft support member (13) is configured to rotate between the downward posture (Pd) and the upward posture (Pu).
The protruding posture holding means (17) is formed by a locking portion (28) provided on the shaft support member (13), and the shaft support member is in a state where the caster (12) is in the protruding posture (P2). When the locking portion (28) is locked to the side edge portion (8) of the top plate when the (13) is in the upward posture (Pu), and when the shaft support member (13) is in the downward posture (Pd). The caster device for a workbench according to claim 2, wherein the locking portion (28) is configured to be detached from the side edge portion (8) of the top plate. A detent means (24) for locking the slider (18) and the holder (19) in a slidable state so as not to rotate is provided between the slider (18) and the holder (19).
The anti-rotation means (24) is characterized in that the slider (18) is made rotatable by releasing the lock when the caster (12) is in the protruding posture (P2). The caster device in the workbench according to claim 2 or 3. The side edge portion (8) of the top plate (2) is bent downward from the upper surface of the top plate to the side end surface (6b) and from the side end surface toward the internal space (S1). It is provided with a side lower surface (6c), and an acute-angled bending angle θ1 is formed between the side end surface (6b) and the side lower surface (6c).
The locking portion (28) of the shaft support member (13) constituting the protruding posture holding means (17) has the caster (12) as the protruding posture (P2) and the shaft support member (13) as the upward posture (Pu). The claim is characterized in that it includes a first locking portion (28a ) that locks to the side end surface (6b) and a second locking portion (28b) that locks to the side lower surface (6c). The caster device in the workbench according to item 3 or 4. In a workbench provided with a lower surface (6c) on the side facing the internal space (S1) below the side edge (8) of the top plate (2).
An operation piece (27) is provided on the side of the shaft support member (13).
When the operator grips the operation piece (27) , the shaft support member (13) is changed from the downward posture (Pd) to the upward posture (Pu) while the caster (12) is in the protruding posture (P2). The workbench according to claim 3, 4 or 5, wherein a stopper (29) that abuts on the lower surface (6c) of the side surface (6c) is formed by the side surface of the operation piece (27) when the operation piece (27) is turned. Castor device in.

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