JP2018188000A - Casters on work bench - Google Patents

Abstract

To provide a caster device that enables a folding workbench to be easily moved in a folded state. [Solution] The workbench is provided with legs (3) near the four corners of the top plate (2), and a pivot mechanism (4) that allows the workbench to be freely changed between an unfolded position in which the legs are hung downward from the top plate, and a folded position in which the legs are stored under the top plate. The workbench is provided with casters (12) each having a wheel (14) journaled on a journal member (13), a caster support mechanism (15) that allows the casters (12) to be moved forward and backward between a stored position (P1) in which the casters (12) are stored in an internal space (S1) on the inside from a side edge (8) under the top plate (2) and a protruding position (P2) in which the casters protrude from the side edge (8) into an external space (S2) on the outside by moving them back and forth, a stored position holding means (16) that holds the casters (12) in the stored position (P1), and a protruding position holding means (17) that holds the casters (12) in the protruding position (P2). [Selected drawing] Figure 2

Description

The present invention relates to a caster device that can be easily moved in a folded state of a folding work table.

Conventionally, for the convenience of moving a foldable workbench in a folded state, one provided with casters has been proposed.

JP 2003-239527 A

The work table proposed by Patent Document 1 is provided with a caster attached to the inside of the lower end of the leg portion constituting the ladder frame, and when the work table is tilted with respect to the ground with the leg folded, the caster is It is configured to face the ground.

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

However, since the caster is always attached in a protruding state inward from the leg portion, there are various problems.

For example, when working at a high place, the caster protrudes from the legs near the ground with the deployed legs installed on the ground, so there is a risk that an operator or other person may trip and fall the work table. .

In addition, when storing the work table when not in use, the casters protrude from the legs even when the work table is folded, so it is difficult to stack a plurality of work tables in a stable state. There is a risk that the caster that has been damaged will collide with a foreign object and be damaged.

Therefore, according to the present invention, the caster is in the protruding posture when necessary, but can be stored well as the retracted posture when unnecessary, and the posture can be easily changed between the protruding posture and the retracted posture. An object of the present invention is to provide a caster device configured so that a protruding posture can be satisfactorily maintained even when the protruding caster receives a load of the working table during movement of the folded work table.

Therefore, the present invention is configured as a means in which legs are provided in the vicinity of the four corners of the top plate, and the leg portions are suspended downward from the top plate, and stored below the top plate. In a working table provided with a pivoting mechanism that allows the posture to be freely changed between the folding postures, a caster having a wheel pivotally supported on a shaft support member, and the caster on the lower side of the top plate and inside the side edge portion A caster support mechanism that can be changed in posture by moving forward and backward between a retracted posture stored in the internal space of the storage device and a protruding posture protruded from the side edge portion to the outer space outside, and the retracted posture of the caster And a protruding posture holding means for holding the protruding posture of the caster.

Preferably, the caster support mechanism includes a slider extending in a forward / backward movement direction from a shaft support member of the caster, and a holder for slidably holding the slider below the top plate, the slider and the holder In between, a spring that elastically biases the caster in the retracted posture is provided, and the spring constitutes the retracted posture holding means, and the caster protrudes by moving the slider against the spring. When the posture is set, the protruding posture is held by the protruding 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 protruding 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 projecting posture, and rotated to rotate the shaft support portion around the slider. The projecting posture holding means is formed by a locking portion provided on the shaft support member, and the caster is in a projected posture in a state where the material is swiveled between a downward posture and an upward posture. The locking portion is locked to the side edge of the top plate when the support member is in the upward posture, and the locking portion is separated from the side edge of the top plate when the support member is in the downward posture. doing

The slider and the holder are provided with non-rotating means for locking the slider so that the slider is not rotatable in a slidable state, and the non-rotating means releases the locking when the caster is in the protruding posture. By doing so, the slider is configured to be rotatable.

Preferably, the side edge of the top plate includes a side end surface bent downward from the top 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 An acute bending angle θ1 is formed between the side lower surfaces, and the locking portion of the shaft support member constituting the projecting posture holding means has the caster as a projecting posture and the shaft supporting member as an upward posture. A first locking portion locked to the side end surface and a second locking portion locked to the side lower surface are provided.

More preferably, in a work table provided with a side lower surface facing the internal space below the side edge of the top plate, an operation piece is provided on the side of the shaft support member, and the operation piece includes a caster. When the pivot support member is turned from the downward posture to the upward posture in the projecting posture, the stopper contacts the lower surface of the side.

According to the present invention, the caster 12 can be held in the retracted posture P <b> 1 when the legs of the work table 1 are used for working at a high place in the deployed posture or when folded and stored. For this reason, when working at a high place by the work table 1, the operator's feet are not caught on the casters 12, and the work can be performed safely.

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

And according to this invention, while the structure for changing the attitude | position of the caster 12 between the storing attitude | position P1 and the protrusion attitude | position P2 is simple, operativity is very favorable, and also by setting it as the protrusion attitude | position P2, When the folded work table is moved on the ground, the load of the work table that is a heavy object is preferably supported, and even if a load or torque is applied to the wheel 14 due to a change in the moving direction during movement, etc. The shaft support member 13 is suitably endured, and the posture is not lost, and the function as the caster 12 can be suitably achieved.

It is a perspective view which shows one example of the working table provided with the caster apparatus which concerns on one Embodiment of this invention. The caster apparatus is shown, (A) is a perspective view which shows the state which made the caster protrude from the top plate of a work bench, (B) is the state which is moving the work bench folded using the caster. FIG. It is the perspective view which shows the state which turned the lower surface of the top plate upward, and shows a caster support mechanism in a disassembled state. It is a perspective view which shows the slider and holder which comprise a caster support mechanism in a disassembled state. It is a perspective view which shows the state which made the caster and the pivotal support member the downward attitude | position with respect to the effect | action of a caster apparatus in a retracted attitude | position. It is a perspective view which shows the state which made the caster and the pivotal support member the upward attitude | position with respect to the effect | action of a caster apparatus as a protrusion attitude | position. 2A and 2B show the operation of a caster device, in which FIG. 1A is a perspective view showing a state in which a caster in a retracted posture is held by a retracted posture holding means, and FIG. 2B shows a state before the caster in a protruding posture is turned. It is a perspective view, and (C) is a perspective view showing a state in which a caster in a protruding posture is held by a 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 work table)
The work table provided with the caster device of the present invention is a general-purpose work table widely including various types used for work at a high place in a construction site or the like, and therefore its shape and size are particularly limited. One example is shown in FIG.

In the case of the illustrated example, the work table 1 is provided with leg portions 3 in the vicinity of the four corners of the top plate 2, and the deployed position in which the leg portions 3 are suspended downward from the top plate 2, and below the top plate 2. A pivot mechanism 4 is provided that allows the posture to be freely changed between the stored folded postures. In the case of the illustrated example, the top plate 2 is provided with a wife side frame 6 and a girder side frame 7 on the short side and the long side of the flooring 5 formed in a rectangular plate shape, respectively, and the wife side formed by each frame. The edge 8a and the spar-side edge 8b are used as the side edge 8 of the top plate 2.

The leg 3 is rotated as shown by the arrow through the pivot mechanism 4 so that the posture can be freely changed between the deployed posture and the folded posture. It is held by the locking means 9 (see FIG. 3) provided in the. A pair of locking means 9 and 9 are provided along the inside of the wife side edge portion 8a so that the pair of leg portions 3 and 3 facing each other at the wife side edge portion 8a of the top plate 2 are detachably locked. It is housed in the wife side frame 6 together with a spring (not shown), and is biased so that the tip protrudes from both ends of the wife side frame 6. The pair of locking means 9 and 9 are provided with knobs 9a and 9a by bending downward the mutually opposing ends, as shown by an arrow M in FIG. When they are moved in directions close to each other, the tip portion is retracted, and the leg portions 3 and 3 are unlocked to be freely rotatable.

A pair of legs 3 and 3 that are opposed to each other at the wife side edge 8a of the top plate 2 constitute a ladder leg connected by a traverse 10 and the base end of the clue bar 11 is formed at the upper end of each leg 3. The department is pivoted. The clue bar 11 is rotatable between an upright posture standing upright from the leg portion 3 toward the upper side of the top plate 2 and a superposed posture superimposed on the leg portion 3 by reversing from the upright posture, They are held in their respective postures by locking means (not shown).

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

As shown in FIG. 2A, the wife side frame 6 includes a side upper surface 6a that forms the upper surface of the side edge of the top plate 2, a side end surface 6b that is bent downward from the side upper surface 6a, 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. On the side, the inner side from the boundary line L is the inner space S1, and the outer side is the outer space S2.

(Caster equipment)
As shown in FIG. 2B, the present invention is provided with a caster device including a caster 12 that faces the ground when the work table 1 is tilted with respect to the ground in a folded state. The caster 12 is configured by pivotally supporting a wheel 14 on a pivotal support member 13. Therefore, an operator pulls the folded work table 1 while rolling the wheel 14 on the ground. Therefore, it can be easily moved. 2A shows the caster 12 protruding from the wife side edge portion 8a in a state in which the leg portion 3 is in the deployed posture for convenience of understanding, the leg portion 3 is originally in the deployed posture. As described above, when working at a high place on the work table 1, the caster 12 is desirably set in the retracted posture P1.

The caster 12 is located between the storage posture P1 stored in the inner space S1 from the side edge 8 on the lower side of the top plate 2 and the protruding posture P2 protruded from the side edge 8 to the outer space S2 outside. Thus, the posture can be freely changed by moving forward and backward.

Therefore, the caster device has 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 caster 12 in a protruding posture. Protruding posture holding means 17 for holding in the state of P2 is provided.

In the caster device, the caster 12 may be disposed so as to enable 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 wife side edge 8a so that the retracted position and the protruding position are possible, and as shown in FIG. 2 (B), the worker can fold while standing on the ground. Since the folded work table 1 can be pulled, the moving work is facilitated.

In the following, one embodiment of the caster device will be described in detail with reference to FIGS. 3 to 7. However, for the purpose of showing the lower side of the top plate 2, the lower side of the top plate 2 is shown upward, and the top plate is indicated by an arrow D. 2 indicates a downward direction, and an arrow U indicates an upward direction of the top plate 2.

As shown in FIGS. 3 to 6, the caster support mechanism 15 is slidable on the slider 18 extending from the shaft support member 13 of the caster 12 in the forward / backward movement direction, and below the top plate 2. It is comprised by the holder 19 hold | maintained to.

The slider 18 is formed of a round rod-like rod, and is fixed to a side surface of one end of the rod in a state in which the shaft support member 13 of the caster 12 protrudes laterally. 14 is exposed, and a male screw 18a is formed at the other end. Accordingly, the wheel 14 and the shaft support member 13 constituting the caster 12 project in the downward direction Pd projecting in the downward direction D 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 turned between the upward postures 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 the lower side of the top plate 2 is attached to an attachment base 21 fixed to the holding member 20. It is attached and fixed by a fastener such as a rivet. In the case of the illustrated embodiment, the flooring 5 of the top plate 2 is provided with a rib 5a having a T-shaped cross section on the lower side, and is fixed in a state where the mounting base 21 is placed 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 a spring 22 made of a coil spring is attached to the rod insertion portion. In the inserted state, a spring receiving member 23 made of a nut is attached to the male screw portion 18a.

Accordingly, the spring 22 is compressed between the holder 19 and the spring receiving member 23 and elastically urges the caster 12 in the storage posture P1. The caster 12 is brought into the retracted posture P1 by bringing the shaft support member 13 into contact with the holder 19, and the retracted posture P1 is held by the elastic biasing force. 17 is configured.

Between the slider 18 and the holder 19, there is provided anti-rotation means 24 for locking the slider 18 in a slidable state in a non-rotatable manner. In the case of the illustrated embodiment, the anti-rotation means 24 includes a protrusion 25 protruding from the side surface of the slider 18 and a slit 26 opened on the side of the holder 19 in the forward / backward movement direction of the slider 13. 26 has an opening 26 a at the end of the holder 19.

Therefore, when the caster 12 is in the retracted posture P1, the projection 25 is locked to the slit 26, whereby the slider 18 is held unrotatable and the caster 12 is held in the downward posture Pd. Accordingly, the detent 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 toward the external space S2 against the spring 22, and the caster 12 is in the protruding posture P2, the projection 25 escapes from the opening 26a of the slit 26. By releasing the lock, the slider 18 can be rotated. 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 holding the operation piece 27 with the fingertip and pulling it toward the external space S2, and further, while holding the operation piece 27 Thus, the caster 12 can be turned around the axis of the slider 18. In the case of the illustrated example, the operation piece 27 includes a base portion 27a that is formed of a rod and extends laterally from the shaft support member 13, and a distal end portion 27b that is bent at the distal end of the base portion 27a and extends in the axial direction of the slider 18. I have.

Therefore, as shown in FIG. 6, when the caster 12 is swung in the projecting posture P <b> 2 and turned into the upward posture Pu, the locking portion 28 provided on the shaft support member 13 of the caster 12 is attached to the top plate 2. The caster 12 is prevented from returning toward the retracted posture P1 by the spring 22 by engaging with the side end surface 6b formed on the wife side edge 8a. Accordingly, the protruding posture holding means 17 is constituted by the locking portion 28. 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 wife side frame 6 constituting the wife side edge 8a of the top plate 2 are bent at an acute bending angle θ1. In contrast, 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 coincide with θ1.

Therefore, by holding the operation piece 27 with the fingertip, the caster 12 is turned in the protruding posture P2, and is turned upward, and the first locking portion 28a is opposed to the side end surface 6b. When the operation piece 27 is released from the fingertip, the first locking portion 28a comes into contact with and locks the side end surface 6b by the elastic urging force of the spring 22. In this state, the first locking portion 28a and the second locking portion 28b that are adjacent via the angle θ2 hold the side end surface 6b and the side lower surface 6c that are adjacent to each other via the bending angle θ1. Since it is locked, the caster 12 is preferably prevented from turning, and the protruding posture P2 and the upward posture Pu are 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 constitute a stopper 29 for regulating the turning position. Therefore, when the operator grips the operation piece 27 and turns the caster 12, there is no possibility of an erroneous operation of turning to a position that has gone beyond the upward posture Pu, and the operability is good.

As shown in FIG. 7, in the caster device of the present invention in which the caster 12 is supported by the caster support mechanism 15, it is preferable to provide two or more sets at the end side edge portion 8 a of the top plate 2. In the case of the illustrated embodiment in which two sets of casters 12 and 12 are provided, the operation pieces 27 are arranged symmetrically so as to protrude from the respective casters 12 toward the spar side edge portion 8b of the top plate 2. It is preferable. As a result, as will be described later, when the casters 12 and 12 in the projecting posture P2 are turned to be in the upward posture Pu, the distal end portion 27b of the operation piece 27 is in a position where it interferes with the knob portion 9a of the lock means 9. Arranged and locked so that the knob portion 9a of the lock means 9 cannot move in the locking release direction M (see FIG. 7C).

As shown in FIG. 7 (A), when the caster device is used for working at a high place with the leg 3 of the work table 1 in a downwardly deployed posture, or when the leg 3 is folded and stored, as shown in FIG. 12 can be set to the retracted posture P1 with respect to the top plate 2, and in the illustrated embodiment, it is in the downward posture Pd. Although not shown, since the leg portions 3 and 3 are folded on both sides of the two sets of caster devices, the caster 12 does not protrude beyond the leg portion 3.

Since the caster 12 is held in the retracted posture P <b> 1 by the retracted posture holding means 16 constituted by the spring 22, it does not accidentally protrude from the wife side edge portion 8 a of the top plate 2. For this reason, when the work table 1 is used for work at a high place, the operator's feet are not caught by the casters 12. In addition, when the plurality of folded work tables 1 are stored by being stacked, the casters 12 are not crushed between the upper and lower work tables.

When the work table 1 is moved according to the work place, or when the work place 1 is moved from the work place to the storage place, the work table 1 is folded and the caster 12 is set to the protruding posture P2 as shown in FIG. In addition, the work table 1 can be moved by tilting it with respect to the ground and rolling the wheels 14 on the ground. Since the work table 1 is entirely made of metal and is quite heavy, being able to move without the need for lifting by the casters 12 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. 7B and 7C, the operation piece 27 is gripped, and the caster 12 is pulled out against the spring 22 and swung. Thereafter, it is only necessary to release from the gripping, and the operability is extremely good. In this state, the protruding posture holding means 17 configured by the locking portion 28 holds the caster 12, and the wheel 14 of the caster 12 in the upward posture Pu faces the grounding surface in the upward direction U of the top plate 2. Let it come. Therefore, as shown in FIG. 2B, if the folded work table 1 is tilted on the ground, the grounding surface of the wheel 14 is grounded to the ground.

When the two 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 operation pieces 27 and 27 face each other. As shown in FIG. 7 (C), the tip 27b is locked inside the knob 9a of the lock means 9, and the knob 9a is moved in the unlocking direction M. Stop moving towards. That is, the lock means 9 is locked so that it cannot be rotated in a state in which the leg portion 3 is folded, and is held by the distal end portion 27b so that the lock cannot be released.

For this reason, when the folded work table 1 is moved by the casters 12, the lock means 9 is not inadvertently unlocked by receiving vibration or external force, so that the leg 3 is suddenly rotated in the deployment direction. There is no danger of moving.

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

During the movement of the work table 1, the caster 12 is supported in the projecting posture P <b> 2 by the projecting posture holding means 17, and thus suitably supports the inclined work table load. 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 positioned adjacent to each other with the angles θ1 and θ2 that are acute angles. The two locking portions 28b are fixed in a stable state in which the side end surface 6b and the side lower surface 6c of the wife side frame 6 are held. For this reason, even if a load or torque is applied to the wheel 14 due to a change in the direction of movement while moving on the ground, the shaft support member 13 is suitably endured and does not lose its posture. Can be suitably achieved.

When the caster 12 is changed from the projecting posture P2 to the retracted posture P1, if the operating piece 27 is gripped and the caster 12 is moved slightly toward the external space S2 against the spring 22, the locking portion 28 Since the locking is released, the caster 12 can be swung so as to be in the downward posture Pd. Therefore, after turning, the caster 12 is automatically returned to the retracted posture P1 by the spring 22 while being held in the downward posture Pd by the detent means 24. The property is very good.

DESCRIPTION OF SYMBOLS 1 Work table 2 Top plate 3 Leg part 4 Pivoting mechanism 5 Floor material 5a Rib 6 Wife side frame 6a Side upper surface 6b Side end surface 6c Side lower surface 7 Girder side frame 8 Side edge 8a Wife side edge 8b Girder side edge 9 Locking means 9a Operation piece 10 Step bar 11 Cage bar 12 Caster 13 Axle support member 14 Wheel 15 Caster support mechanism 16 Storage attitude holding means 17 Projection attitude 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 portion 27 Operation piece 27a Base portion 27b Tip portion 28 Locking portion 28a First locking portion 28b Second locking portion 29 Stopper

Claims (6)

There are legs (3) in the vicinity of the four corners of the top plate (2), and between the unfolded posture in which the legs are suspended from the top plate and the folded posture stored in the lower side of the top plate, In the worktable provided with a pivoting mechanism (4) that allows posture change freely,
A caster (12) formed by pivotally supporting a wheel (14) on a shaft support member (13);
A retracted posture (P1) in which the caster (12) is stored in the inner space (S1) from the side edge (8) below the top plate (2), and from the side edge (8) to the outside. A caster support mechanism (15) that allows the posture to be freely changed by moving forward and backward between the protruding postures (P2) projected into the external space (S2) of
A storage posture holding means (16) for holding the storage posture (P1) of the caster (12) and a protrusion posture holding means (17) for holding the protrusion posture (P2) of the caster (12) are provided. A caster device in a working table as a feature. The caster support mechanism (15) includes a slider (18) extending from the shaft support member (13) of the caster (12) in the forward / backward movement direction, and the slider slides below the top plate (2). With a holder (19) to hold freely,
Provided between the slider (18) and the holder (19) is a spring (22) that elastically urges the caster (12) in the retracting posture (P1), and the retracting posture is provided by the spring (22). Constituting the holding means (16),
When the caster is brought into the protruding posture (P2) by moving the slider (18) against the spring, the protruding posture holding means (17) is configured to hold the protruding posture. The caster apparatus in the worktable of Claim 1 characterized by the above-mentioned. The slider (18) is slidably and rotatably held by the holder (19), and the shaft support member (13) of the caster (12) protrudes to the side of the slider (18). The grounding surface of the wheel (14) is exposed in the protruding direction by being fixed in a state,
By sliding the slider (18), the caster (12) is moved between the retracted posture (P1) and the protruding posture (P2), and rotated to rotate the caster (12) around the slider (18). The pivot member (13) is configured to pivot between a downward posture (Pd) and an upward posture (Pu),
The protrusion posture holding means (17) is formed by a locking portion (28) provided on the shaft support member (13), and in a state where the caster (12) is in the protrusion posture (P2), the shaft support member When (13) is in the upward posture (Pu), the locking portion (28) is locked to the side edge (8) of the top plate, and when the pivot 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. The slider (18) and the holder (19) are provided with a non-rotating means (24) for locking the slider in a slidable and non-rotatable manner,
The anti-rotation means (24) is configured such that when the caster (12) is in the protruding posture (P2), the slider (18) is rotatable by releasing the locking. A caster device for a workbench according to claim 2 or 3. The side edge (8) of the top plate (2) is bent toward the inner space (S1) from the side end surface (6b) bent downward from the top surface of the top plate. A side lower surface (6c), and an acute 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 supporting member (13) as the upward posture (Pu). In this case, a first locking portion (8a) locked to the side end surface (6b) and a second locking portion (28b) locked to the side lower surface (6c) are provided. Item 5. The caster device in the work table according to item 3 or 4. In the work table provided with a side lower surface (6c) facing the internal space (S1) below the side edge (8) of the top plate (2),
An operating piece (27) is provided on the side of the shaft support member (13),
When the operation piece (27) turns the caster (12) from the downward posture (Pd) to the upward posture (Pu) with the caster (12) in the protruding posture (P2), the operation piece (27) 6. A caster device for a work table according to claim 3, 4 or 5, characterized in that a stopper (29) is formed in contact with the side lower surface (6c).

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