JP6647032B2 - Caster equipment on workbench - Google Patents

Description

The present invention relates to a caster device that enables a work table for working at a high place to move on a floor surface.

Normally, the worktable is a ladder-shaped main frame having a pair of left and right main legs provided on one edge of the work top plate, and a support frame having a pair of left and right support legs provided on the other edge. It is installed on the floor surface, and is configured so that an operator can climb on the main landing gear and get on the work top plate to perform work at high places. As the work progresses, the worker needs to go down to the floor and move the work table to the next work place. Therefore, in order to easily move the work table, a work table provided with a caster device is provided.

The caster device in the conventional worktable is generally configured to raise and lower the wheels up and down.For safety of work, the wheels are not grounded when the worktable is installed on the floor, and the floor is not grounded. When the operator descends, the main leg or the support leg is lifted off the floor surface, and the wheel is lowered to contact the ground, so that the work table can be moved in this state.

JP 2009-287224 A JP 2010-27037 A JP 2014-95219A

However, a caster device configured to raise and lower wheels up and down as shown in the patent document, each time the work table is moved, the worker not only grounds by lowering the wheels while lifting the work table, but also moving After that, it is necessary to secure the installation state of the worktable by raising the wheels again, which complicates a complicated and time-consuming work, and there is a problem in work efficiency.

Therefore, in order to solve the problem of this point, the wheels are not grounded when the workbench is set on the floor, but the wheels that touch the floor are lifted only by the worker who gets off the floor and lift the main frame. It is preferable to provide a caster device having the above configuration (hereinafter, referred to as an “inclination posture ground-type caster device”).

Such an inclined posture grounding type caster device can be configured by mounting wheels outwardly via a bracket at a position near the lower end of the support frame. According to this, if the operator lifts the main frame and tilts the support frame together with the work table, the wheels are grounded, so that the work table can be easily moved in that state, and after the movement, the main frame can be moved. Since the wheels are separated from the floor surface simply by being lowered and installed on the floor surface, a safe installation state can be ensured, and workability can be improved.

However, with a workbench provided with an inclined posture grounding type caster device, for example, when performing high-altitude work on a wall surface, wheels are mounted outward from a lower end of a support frame facing the wall surface via a bracket. Since the wheels interfere with the wall surface, the work table of the worktable cannot be brought close to the wall surface. That is, as compared with the conventional worktable, the work top plate separates from the wall surface in an amount corresponding to the amount of protrusion of the wheels, making the work difficult and possibly causing the operator to step off the foot.

For this reason, an object of the present invention is to provide a caster device in a workbench that can be properly stored during wall work while retaining the advantages of the inclined posture grounded caster device.

Therefore, the present invention is configured as a means such that a ladder-shaped main frame having a pair of left and right main legs provided on one edge of a work top plate, and a pair of left and right supports provided on the other edge. In a workbench installed on the floor by a support frame having legs, the lower ends of the pair of support legs are connected by a connecting bar, and the side facing the main frame is defined as the inside of the connecting bar, and the opposite side is connected to the connecting bar. A caster device is provided on the connecting bar as an outside of the bracket, the caster device includes a pivot provided on the connecting bar, a bracket rotatably connected via the pivot, and a tip of the bracket. A bracket pivotally mounted on the portion, wherein the bracket has a deployment position with respect to the pivot, the deployment position being directed to the outside of the connection bar so that the wheel faces the floor, and the bracket being directed toward the inside of the connection bar. Storage posture and Between, is configured to be freely rotated in the reverse direction, and provided with a locking mechanism for fixing the bracket so as not to rotate by disengageably locking in a state where the bracket a developing attitude and the housing attitude In the caster device, when the support frame is installed on the floor with the bracket in the deployed position, the wheels are separated from the floor without contacting the ground, and the support frame is tilted by lifting the main frame. And that the wheels are configured to contact the floor surface .

It is preferable that the bracket is provided with deployment positioning means which comes into contact with the outer side surface of the connecting bar when in the deployed posture, and storage positioning means which comes into contact with the upper surface of the connecting bar when in the stored posture.

In a preferred embodiment of the present invention, a mounting base member fixed to the connecting bar is provided, and the mounting base member is disposed closer to an outer side of an upper portion of the connecting bar and a bearing that supports the pivot. A first locking receiving portion disposed on the outer side below the connecting bar, and a second locking receiving portion disposed on the inner side above the connecting bar. A first locking hole communicated with the first locking receiving portion when in the deployed position, and a second locking hole communicating with the second locking receiving portion in the retracted position. A first engaging member which is provided to be selectively inserted into and removed from the first and second engaging holes so as to be selectively inserted into and removed from the first engaging hole and the second engaging hole. When the bracket is in the retracted position, the stop hole and the first locking receiving portion are mutually connected. The second locking hole and a second lock receiving portion to constitute the locking mechanism by inserting selectively the locking pin.

A main shaft portion slidably and rotatably inserted in an axial direction with respect to the bracket; and a handle portion disposed on an outer portion of the bracket by being bent from the main shaft portion. And a locking portion folded back from the handle portion so that the locking portion is selectively inserted into the first locking hole and the second locking hole through sliding and rotation of the main shaft portion. The main shaft portion is provided with a spring that resiliently urges the locking portion in a direction in which the locking portion is inserted into the first locking hole and the second locking hole.

According to the present invention, since the caster device having the inclined posture and grounding type is configured, the work can be performed by the work table 1 in a state where the bracket 8 of the caster device 6 is in the deployed posture P1. When moving the work table 1 to the next place, if the worker who has descended on the floor G lifts the main frame 3 and tilts the support frame 4 together with the work table 1, the wheels 9 of the caster device 6 are grounded. In this state, the work table 1 can be easily moved. After the movement, the wheels 9 are separated from the floor surface G only by lowering the main frame 3 to be installed on the floor surface G. As a result, workability can be improved.

When performing a high-place operation on the wall surface W, the bracket 8 of the caster device 6 is set in the storage posture P2, so that the lower end of the support leg 4a of the work table 1 can be installed in a state of being close to the wall surface W. Therefore, there is an effect that the work can be easily and safely performed in a state where the gap S2 between the work top plate 2 and the wall surface W is small.

1A and 1B show an example of a work table provided with an inclined posture grounding type caster device according to an embodiment of the present invention, wherein FIG. 1A is a side view showing an installed state of the work table, and FIG. FIG. 7 is a side view showing a movable state in which the wheels are brought into contact with the ground. FIG. 3A is a side view showing a state in which a work table is installed facing a wall, and FIG. 4A is a side view showing a state in which a bracket of a caster device is in a deployed position, and FIG. is there. 3A and 3B show a folding structure of a work table, wherein FIG. 3A is a side view showing a state where a leg is opened, and FIG. 3B is a side view showing a state where the leg is closed. It is a perspective view which shows a caster apparatus in an disassembled state. 3A and 3B show a caster device in a state where a bracket is in a deployed position, in which FIG. 3A is a longitudinal sectional view, and FIG. 3B is a sectional view taken along line AA. It is a perspective view showing a state where a bracket was made into a deployment posture about a pair of right and left caster devices provided in a connecting crosspiece. It is a longitudinal section showing a caster device in the state where a bracket was stored. It is a perspective view showing the state where a bracket was made into a storage posture about a pair of right and left caster devices provided in a connecting bar.

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

(Overall configuration)
FIG. 1 shows an example of a work table. The work table 1 has a ladder-shaped main frame 3 having a pair of left and right main legs 3a provided on one side (left side in the figure) of a work table 2 and the other. A support frame 4 having a pair of left and right support legs 4a provided on the right side of the drawing (shown on the right side) is installed on the floor surface G, and the work top plate 2 enables work at high places. It should be understood that the floor surface G includes a road surface and the ground in addition to the floor surface of a building or the like.

As will be described later, the work table 1 is configured so that the main frame 3 and the support frame 4 can be freely opened and closed so as to enable the open leg setting state and the closed leg folding state. In the above, the main frame 3 holds an inclined posture at a predetermined angle θ1 from the ground G toward the support frame 4 with respect to the vertical line, and the support frame 4 moves from the ground G to the main frame 3 with respect to the vertical line. It is configured to maintain an inclined posture at a predetermined angle θ2 toward the camera, and is preferably configured to satisfy θ1> θ2.

The main frame 3 is formed in a ladder-like shape by providing a horizontally extending step bar 3b between a pair of left and right main legs 3a, 3a so that an operator can move between the floor surface and the work top plate 2. It is configured to be able to go up and down.

The support frame 4 has lower ends of a pair of left and right support legs 4a, 4a near the ground G connected by a connecting bar 5, and the connecting bar 5 is provided with a caster device 6. In the illustrated embodiment, an upper connecting bar 5a for connecting the support legs 4a, 4a is provided at a position above the connecting bar 5, but it is not an essential member, and the supporting frame 4 is the same as the main frame 3. May be formed in a ladder shape so that the worker can go up and down.

As shown in FIGS. 4 to 8, the caster device 6 includes a pivot 7 arranged above the connecting bar 5, a bracket 8 pivotally connected via the pivot 7, A wheel 9 is supported at the tip.

Hereinafter, of the inside and outside sides of the connecting bar 5, the side facing the main frame 3 (left side in the figure) will be described as “inside”, and the opposite side (right side in the figure) will be described as “outside”.

The bracket 8 has a deployment posture P1 facing the outside of the connecting bar 5 so that the wheel 9 faces the floor surface G with respect to the pivot 7, and a storage position facing the inside of the connecting bar 5. The bracket 8 is configured to be reversibly rotatable with respect to the posture P2, and is fixed to the bracket 8 so as to be unrotatable by engaging and disengaging the bracket 8 with the bracket 8 in the deployed posture P1 and the storage posture P2. Locking mechanism 10 is provided.

(Operation during normal work)
In view of this, the caster device 6 constitutes the above-described inclined posture grounding type caster device, and as shown in FIG. The wheel 9 faces the floor G but is slightly separated from the floor G so that it does not touch the ground G by fixing the bracket 8 in the deployed posture P1. Make it possible.

Then, when the work table 1 is moved to the next work place with the progress of the work, the worker lifts the main frame 3 after descending on the floor G as shown in FIG. Since the support frame 4 is tilted together with the entire work table 1 and the wheels 9 of the caster device 6 are grounded, the work table 1 can be moved to a desired place by maintaining the lifted state. After the movement, by simply lowering the lifted main frame 3 to make it touch the floor G, it is returned to the installation state shown in FIG.

(Operation during wall work)
By the way, as shown in FIG. 2 (A), when performing high-altitude work on the wall surface W using the worktable 1, when the bracket 8 of the caster device 6 is in the deployed posture P <b> 1, Since the work 9 interferes with the wall surface W in the state of the outward position via the bracket 8, a large gap S1 is generated between the work top plate 2 and the wall surface W, making it difficult to work or stepping off the operator's foot. There is.

Therefore, in this case, as shown in FIG. 2B, the work table 1 may be set with the bracket 8 in the storage posture P2, and thereby the lower end of the support leg 4a (in the illustrated embodiment, provided at the lower end). The grounded seat member 4b) is brought close to the wall surface W until the gap S2 between the work table 2 and the wall surface W can be reduced (that is, S2 <S1), so that the work can be performed easily and safely. Becomes possible.

(Folding structure of work table)
The work table 1 has a folding structure, and is in an open leg state installed on the floor as shown in FIG. 3 (A) and a closed leg state for non-use storage as shown in FIG. 3 (B). It is possible.

The upper end of the main frame 3 is pivotally connected to the side frame 2a of the work top plate 2 via a pivot shaft 1a, and the upper end of the support frame 4 is pivotally connected via a pivot shaft 1b. The main frame 3 and the work top plate 2 are connected to each other by an open-stop member 1c which can be bent freely, and the main frame 3 and the support frame 4 are connected to each other by a link arm 1d. Therefore, the work table 1 is extended from the open leg state in which the main frame 3 and the support frame 4 are opened as shown in FIG. 3 (A), as shown in FIG. The top plate 2, the support frame 4, and the main frame 3 are configured to be foldable so as to be in a closed state in which the main frame 3 is overlapped in parallel with the opening prevention member 1 c and the link arm 1 d sandwiched therebetween.

Therefore, the length L1 from the pivot shaft 1a to the lower end of the main frame 3, the length L2 between the pivot shafts 1a and 1b of the work table 2, and the pivot shaft 1b of the support frame 4 The distance from the pivot shaft 1b of the support frame 4 to the upper end of the wheel 9 in a state where the wheel 9 is in the upward position by setting the bracket 8 to the retracted position P2. L4 is provided at a position where L1 <L2 + L4.

Thus, as shown in FIG. 3B, even when the wheels 9 protrude from the support legs 4a toward the inside of the connecting bar 5 in a state where the bracket 8 of the caster device 6 is in the retracted posture P2, as shown in FIG. 1 enables a compact closed state.

(Specific embodiment of caster device)
As shown in FIG. 4, the caster device 6 includes a mounting base member 11 fixed to the connecting bar 5, and the mounting base member 11 cuts, for example, an extruded aluminum material into a predetermined size. And a side wall 12 attached to the inner side surface of the connecting bar 5, an upper wall 13 attached to the upper surface of the connecting bar 5, and a lower wall 14 attached to the lower surface of the connecting bar 5. The side wall 12 and the upper wall 13 are fixed to the connecting bar 5 by a fixing tool 15 such as a rivet or other fastener.

The upper wall 13 is provided with a cylindrical bearing portion 16 that is located near the upper side of the connecting bar 5 and that supports the pivot 7. The lower wall 14 is provided with a generally cylindrical first locking receiving portion 17a which is located below the connecting bar 5 and is located closer to the outside and which constitutes the locking mechanism 10. The intersection of 13 is provided with a substantially cylindrical second locking receiving portion 18a which is located on the upper side of the connecting bar 5 and closer to the inside and constitutes the locking mechanism 10.

On the other hand, the bracket 8 is connected by the connecting portion 8c in a state where the first bracket plate 8a and the second bracket plate 8b that can be mounted with the mounting base member 11 interposed therebetween are arranged in parallel. A state in which the wheel 9 is rotatably supported at the distal end portions of both bracket plates 8a and 8b via an axle 19, and the bearing portion 16 is sandwiched between pivotal tongue pieces 20 and 20 provided at the base end portion. Are pivotally connected by the pivot 7.

The bracket 8 has a first locking hole 17b that is in communication with the first locking receiving portion 17a when in the deployed posture P1, and a second locking receiving hole 17b when in the storage posture P2. A second locking hole 18b communicated with the portion 18a is provided, and a locking pin 21 is selectively inserted into and removed from the first locking hole 17b and the second locking hole 18b. .

Therefore, the first lock receiving portion 17a and the second lock receiving portion 18a of the mounting base member 11, the first locking hole 17b and the second locking hole 18b of the bracket 8, and the locking pin 21, The locking mechanism 10 is configured.

As shown in FIGS. 3 and 5B, the locking pin 21 includes a main shaft portion 22 that is slidably and rotatably inserted in the bracket 8 in the axial direction, and a main shaft portion 22. The handle portion 23 is disposed on the outer side of the bracket 8 by being bent, and the locking portion 24 is folded back from the handle portion 23. The locking portion 24 is selectively inserted into the first locking hole 17b and the second locking hole 18b, and the locking portion 24 is inserted into the first locking hole 17b and the second locking hole 17b. The main shaft portion 22 is provided with a spring 25 that resiliently urges in a direction of being inserted toward the locking hole 18b. In the case of the illustrated example, the coil spring 25 is composed of a coil spring externally inserted into the main shaft portion 22, and both ends of the spring are fixed to the inner surface of the first bracket plate 8 a and the spring bearings fixed to the main shaft portion 22, respectively. It is in elastic contact with the member 25a.

In the case of the illustrated embodiment, the main shaft portion 22 has a large-diameter portion 22a inserted through the first bracket plate 8a and a small-diameter portion 22b inserted through the second bracket plate 8b. However, the present invention is not limited to this. In the case of the example shown in the drawings, the first bracket plate 8a and the second bracket plate 8b are formed in irregular plates, and the first locking holes 17b and the second locking holes 18b are formed in the first bracket plate 8a. However, the present invention is not limited to such a configuration.

5 and 6 show a state where the bracket 8 of the caster device 6 is in the deployed posture P1. In this case, the first locking hole 17b of the bracket 8 matches and communicates with the first locking receiving portion 17a of the mounting base member 11, and the locking portion 21 of the locking pin 21 passes through the first locking hole 17b. Then, the bracket 8 is inserted into the first lock receiving portion 17a, and fixes the bracket 8 in the deployed posture P1.

At this time, the bracket 8 (one or both of the first bracket plate 8a and the second bracket plate 8b) is provided with a deployment positioning means 26 which comes into contact with the outer side surface of the connecting bar 5 in the deployment posture P1. Preferably, the first locking hole 17b and the first locking receiving portion 17a are positioned so as to communicate with each other, and the insertion of the locking portion 24 is facilitated. In the illustrated example, the deployment positioning means 26 is formed by the edges of the first bracket plate 8a and the second bracket plate 8b, but the present invention is not limited to such a configuration.

7 and 8 show a state where the bracket 8 of the caster device 6 is in the storage posture P2. In this case, the second locking hole 18b of the bracket 8 matches and communicates with the second locking receiving portion 18a of the mounting base member 11, and the locking portion 21 of the locking pin 21 passes through the second locking hole 18b. Then, the bracket 8 is inserted into the second lock receiving portion 18a to fix the bracket 8 in the storage posture P2.

At this time, the bracket 8 (one or both of the first bracket plate 8a and the second bracket plate 8b) is provided with the storage positioning means 27 that comes into contact with the upper surface of the connecting bar 5 in the storage posture P2. It is preferable that the positioning is performed so that the second locking hole 18b and the second locking receiving portion 18a communicate with each other, thereby facilitating the insertion of the locking portion 24. In the illustrated example, the storage positioning means 27 is formed by wing pieces bent from the edges of the first bracket plate 8a and the second bracket plate 8b. However, the configuration is not limited to this. .

To change the posture between the unfolded posture P1 and the stored posture P2, the operator grips the handle portion 23 of the locking pin 21 with a fingertip, and locks the locking portion 24 against the spring 25 with the first locking hole 17b. Alternatively, it can be easily performed by pulling out from the second locking hole 18b and inverting the bracket 8 about the pivot 7. Then, after the inversion, the first locking hole 17b and the first locking receiving portion 17a (in the case of the unfolding posture P1) or the second locking hole 18b and the second locking receiving portion 18a (storage) communicated in the positioning state. (In the case of the posture P2), the desired deployment posture P1 or the storage posture P2 is maintained by a simple operation of inserting the locking portion 24 by rotating the locking pin 21 around the main shaft portion 22. Can be. At this time, when the locking portion 24 faces the first locking hole 17b or the second locking hole 18b, the locking portion 24 is automatically inserted by the spring 25, and the inserted state is maintained by the spring 25.

As shown in the illustrated embodiment, it is preferable that the pivot 7 constituting the pivot of the bracket 8 be disposed closer to the outside of the upper part of the connecting bar 5, whereby the storage posture P2 is set as shown in FIG. The bracket 8 can be suitably stored in the space above the connecting bar 5.

It is preferable that the workbench 1 be provided with a pair of left and right caster devices 6, 6 on the connecting bar 5. In this case, as shown in FIGS. 6 and 8, the caster devices 6, 6 configured symmetrically to the left and right are arranged. Is preferred. As a result, the handle portions 23, 23 of the locking pins 21, 21 projecting from the first bracket plates 8a, 8a of the both caster devices 6, 6 are arranged in an opposed state, so that the operator can operate the caster devices 6, 6, 6, it is easy to operate the handle portions 23 of both caster devices.

Reference Signs List 1 work table 1a, 1b pivot shaft 1c opening prevention member 1d link arm 2 work top plate 2a side frame 3 main frame 3a main leg 4 support frame 4a support leg 4b grounding seat member 5 connecting bar 5a upper connecting bar 6 caster device 7 Axis 8 Bracket 8a First bracket plate 8b Second bracket plate 9 Wheel 10 Locking mechanism 11 Mounting base member 12 Side wall 13 Upper wall 14 Lower wall 15 Fixture 16 Bearing 17a First lock receiving portion 17b First lock Hole 18a Second lock receiving portion 18b Second lock hole 19 Axle 20 Pivot tongue piece 21 Lock pin 22 Main shaft 22a Large diameter portion 22b Small diameter portion 23 Handle portion 24 Lock portion 25 Spring 25a Spring receiving member 26 Deployment positioning means 27 Storage positioning means

Claims (4)

A ladder-shaped main frame (3) having a pair of left and right main legs (3a, 3a) provided on one edge of the work top plate (2), and a pair of left and right support legs provided on the other edge (4a, 4a) in the work table installed on the floor by the support frame (4) having,
The lower ends of the pair of support legs (4a, 4a) are connected by a connecting bar (5), and the side facing the main frame is defined as the inside of the connecting bar, and the opposite side is defined as the outside of the connecting bar. The caster device (6) is installed in 5),
The caster device (6) includes a pivot (7) provided on the connecting bar (5), a bracket (8) pivotally connected via the pivot, and a pivot at a tip end of the bracket. With supported wheels (9),
The bracket (8) is, with respect to the pivot (7), a deployed posture (P1) directed outside the connecting bar (5) so that the wheel (9) faces the floor, and the connection It is configured to be able to reverse and rotate between the storage posture (P2) directed toward the inside of the crosspiece (5),
A locking mechanism (10) for locking the bracket (8) so that it cannot rotate is provided by locking the bracket (8) in a deployed position (P1) and a retracted position (P2). and,
The caster device (6), when the support frame (4) is installed on the floor surface with the bracket (8) in the deployed posture (P1), the wheels (9) are separated from the floor surface without being grounded. A caster device for a workbench , wherein the wheel (9) is configured to contact the floor when the support frame (4) is tilted by lifting the main frame (3) . The bracket (8) is provided with a deployment positioning means (26) that comes into contact with the outer surface of the connection bar (5) when the deployment position (P1) is set, and the connection bar (5) when the storage position (P2) is set. 2. The caster device according to claim 1, further comprising storage positioning means (27) which is in contact with the upper surface of the work table. It has a mounting base member (11) fixed to the connecting bar (5),
The mounting base member (11) is disposed on the outer side of the upper part of the connecting bar (5), and a bearing part (16) that supports the pivot (7), and a lower side of the connecting bar (5). A first locking receiving portion (17a) disposed closer to the outside and a second locking receiving portion (18a) disposed closer to the inside above the connecting bar (5),
The bracket (8) has a first locking hole (17b) communicated with the first locking receiving portion (17a) when in the deployed position (P1), and has a storage position (P2). At this time, a second locking hole (18b) communicated with the second locking receiving portion (18a) is provided, and selectively inserted into the first locking hole (17b) and the second locking hole (18b). Equipped with a locking pin (21) that is removably inserted,
When the bracket (8) is in the unfolded position (P1), the first locking hole (17b) and the first locking receiving portion (17a) communicating with each other, and the bracket (8) is in the storage position (P2 ), By selectively inserting the locking pin (21) into the second locking hole (18b) and the second locking receiving portion (18a) which are in communication with each other. The caster device according to claim 1 or 2, wherein the caster device (10) is configured. The locking pin (21) has a main shaft portion (22) inserted slidably and rotatably in the axial direction with respect to the bracket (8), and the bracket is bent from the main shaft portion. A handle portion (23) disposed on the outer side of the handle portion, and a locking portion (24) folded back from the handle portion, and the locking portion (24) is formed by sliding and rotating the main shaft portion. It is configured to be selectively inserted into the first locking hole (17b) and the second locking hole (18b),
A spring (25) that resiliently biases the locking portion (24) in a direction in which the locking portion (24) is inserted into the first locking hole (17b) and the second locking hole (18b) is attached to the main shaft portion (22). The caster device according to claim 3, wherein the caster device is provided.

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