JP2013002205A - Work bench - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work bench in which safety of a worker working on a top plate is ensured.SOLUTION: In a work bench comprising hand posts (5) which are positioned in the vicinity of corners of a top plate and erected toward the upper side of the top plate, hand posts (5a)(5b) adjacent at a gable side are connected by a gable side safety bar (8), and hand posts (5b)(5c) adjacent at a girder side are connected by a girder side safety bar (7). The girder side safety bar (7) is pivoted to the predetermined hand post (5b) via a bracket 9 including lock means (25) and configured to protrude the lock means (25) from an inner side surface (5by) of the predetermined hand post (5b) to an operating position in a horizontal attitude and to retract the lock means (25) from the operating position in a perpendicular attitude. The gable side safety bar (8) is pivoted in the vicinity of an upper end of the predetermined hand post (5a) and configured to lock locked means (15) in a distal end freely removably to the lock means (25) protruded to the operating position of the bracket (9) in a horizontal attitude.

Description

The present invention provides a work table that ensures the safety of an operator who works on a top plate when working at a high place in a construction site or the like.

Conventionally, a workbench is provided with a clue bar that is positioned near the corner of the top plate and stands up above the top plate, and further includes a pair of clue bars that are adjacent to each other on the spar side of the top plate. Work tables provided with connecting girder-side safety bars are known.

JP 2006-152593 A

The above-described prior art describes that a girder-side safety bar can be permanently installed on a workbench, and an operator's fall accident can be prevented. However, since no connecting member is provided between the clasp bars adjacent to each other on the top side of the top plate on which the ladder-shaped main legs face, there is a risk that the operator may fall from the top side of the top plate.

Therefore, in order to increase the safety of the work of the operator, it is only necessary to provide a wife-side safety bar located on the wife side of the top board, but after installing the work table in a predetermined place, a ladder-shaped main leg Since it is necessary to open and close the wife-side safety bar each time the worker ascends and descends from the wife side to the top board using the, it is a problem to be configured so that the opening / closing operation can be easily performed.

Conventionally, the clue bar can be stored so as to overlap the side surface of the main leg, and is configured to be further stored by rotating the main leg to the lower side of the top plate in the stored state. Therefore, when a girder-side safety bar or wife-side safety bar is provided, each safety bar is pivoted so as to rotate between a horizontal posture and a hanging posture, and when it is in a horizontal posture, adjacent clue bars are connected. So that it can be locked and disengaged in a detachable state, and when it is in a suspended position, it is locked and fixed detachably in a state of being integrally stored on the side surface of the pivoted clue bar. Configuration is a challenge.

At this time, when the means for releasably locking and fixing the girder-side safety bar and the wife-side safety bar as described above constitutes a protrusion such as a metal fitting protruding from the side surface of the clue bar, Since there is a possibility that the body is injured or clothes are caught, it is a problem to configure the apparatus so as not to have a protrusion. Moreover, in recent years, where cost competitiveness is required, there is a problem that a work table that has as few parts as possible and is as inexpensive as possible should be provided.

The present invention provides a workbench that solves the above-mentioned problems, and is configured as a means having a wife side along the X direction and a girder side along the Y direction, in the vicinity of the corner of the top plate. A clue bar that is positioned and stands up above the top plate is provided, a pair of clue bars adjacent to each other on the wife side are connected by a wife side safety bar, and a pair of clue bars adjacent to each other on the girder side In a workbench connected by a girder-side safety bar, the girder-side safety bar has a bracket fixed to the base end so that it can freely rotate between a hanging posture and a horizontal posture, near the upper end of a predetermined clue bar When it is in the hanging position, it is locked and fixed along the hand rod so that it can be freely engaged and disengaged, and when it is in the horizontal position, the tip is releasably locked to the other clue bar. The wife safety bar is configured to droop The proximal end of the wife safety bar is pivotally connected to the vicinity of the upper end of a predetermined clue bar so that it can be rotated between the vertical position and the horizontal position. The girder-side safety bar bracket is configured so that the tip end portion faces the bracket when the girder-side safety bar is in a horizontal posture. The bracket is provided with a locking means that protrudes from the inner surface in the Y direction of the predetermined clue bar to which the bracket is pivoted to the operating position, and retracts from the operating position when the girder-side safety bar is in the suspended position. The end portion of the wife side safety bar is provided with a locked means that can be removably locked to the locking means protruding to the operating position in a state where the wife side safety bar is in a horizontal posture. The point is that

In a preferred embodiment of the present invention, the bracket constitutes the locking means by extending a hook piece from a pivot piece pivotally connected to a predetermined clue bar, and the hook piece is arranged on the spar side. When the safety bar is in a horizontal posture, the posture is an upward orientation, and when the girder-side safety bar is in a hanging posture, the posture is a lateral orientation.

According to an embodiment of the present invention, the girder-side safety bar constitutes a telescopic structure formed by a telescopic telescopic tube, and is a protrusion that can be expanded and contracted at the distal end and is always elastically biased in the expanding direction. There is provided a locking means, and when the girder-side safety bar is in a horizontal position in the extended state, the protruding locking means is removably locked in a receiving hole provided on the top surface of the other clue bar. When the girder-side safety bar is in a suspended position in a contracted state, the protruding locking means is configured to be detachably locked to a receiving hole provided on an inner side surface in the Y direction of a predetermined clue bar. ing.

The bracket includes a pair of pivot pieces that hold both side surfaces of a predetermined clue bar in the X direction, and the pair of shaft members protruding from the both side surfaces are respectively inserted into the pivot holes of the pivot pieces. The pair of shaft members are pivotably connected to each other, and are provided so as to be able to protrude and retract on both side surfaces in the X direction of a predetermined clue bar, and are attached so as to protrude from the both side surfaces via biasing means. As a result, when the pair of shaft members are immersed in the predetermined clue bar from the both side surfaces against the biasing means, the pivot piece can be separated from the shaft member.

Further, the wife-side safety bar has a linear portion formed of a flexible linear material that is spaced apart in the vertical direction and extends in parallel, and is sandwiched in the middle portion of the linear portion in the Y direction. When the wife-side safety bar is in a suspended position, both side surfaces of a predetermined clue bar are sandwiched by the sandwiching portion, and the engaged portion is secured by the tip of the upper wire portion. It constitutes stopping means.

According to the first aspect of the present invention, the wife-side safety bar 8A (8B) is provided between the clasp bars 5a, 5b (5c, 5d) adjacent to each other with respect to the wife side x1 (x2) of the top board 2. Therefore, it is possible to prevent the operator from falling down from the wife side of the top board.

At this time, the wife-side safety bar 8A (8B) has a base end portion pivotably connected to a predetermined clasp bar 5a (5c) and a tip end portion facing the other clasp bar 5b (5d). Since the locked means 15 provided at the front end portion is configured to be detachably locked to the locking means 25 provided on the bracket 9 of the girder-side safety bar 7A (7B), the work table 1 Can be easily opened and closed even when the worker ascends and descends from the wife side to the top board 2 by using the ladder-shaped main leg 3 after the installation at a predetermined place. it can.

In particular, according to the present invention, the locking means 25 for locking the locked means 15 of the wife-side safety bar 8A (8B) is provided on the bracket 9 of the girder-side safety bar 7A (7B). 25, when the girder-side safety bar 7A (7B) is in a horizontal posture, it protrudes from the inner surface 5by of the clasp bar 5b (5d) to the operating position, and the locking means 15 of the wife-side safety bar 8A (8B) While it can be locked, it is configured to retract from the operating position when the girder-side safety bar is in the 7A (7B) hanging posture, so that the girder-side safety bar is retracted when 7A (7B) is stored. A protrusion protruding from the inner surface 5by of the clasp bar 5b (5d) is not formed, and therefore there is no danger of injury to the operator's body during the storage operation.

According to the second aspect of the present invention, since the locking means 25 is formed by the hook piece 26 extended from the pivot piece 24 of the bracket 9, the number of parts is small and it is provided at low cost. In addition, the hook piece 26 is in an upward posture when the girder-side safety bar 7A (7B) is in a horizontal posture, and is in a lateral posture when the girder-side safety bar 7A (7B) is in a hanging posture. Thus, when the safety bars 7 and 8 are stored, when the girder-side safety bar 7A (7B) is rotated from the horizontal position to the hanging position, the locking means 25 and the locked means 15 are By automatically releasing the locked state, it is possible to speed up the storing operation.

According to the third aspect of the present invention, the girder-side safety bar 7A (7B) constitutes a telescopic structure formed by the telescopic telescopic pipes 7a, 7b, 7c, and can be expanded and contracted at the distal end. When the projecting and locking means 11 that is normally urged and urged in the expanding direction is provided and the girder-side safety bar 7A (7B) is in a horizontal position in the extended state, the projecting and locking means 11 is used as a clue bar 5c. 5a, when the girder-side safety bar 7A (7B) is in a contracted position in a contracted state, the protruding locking means 11 is held by the clasp bars 5b, 5d. Since the projecting locking means 11 can be inserted and locked into the receiving holes 12 and 13 with a single touch, the operation is easy. In addition, in both cases of use and storage, the protrusion locking means 1 Is inserted into the receiving holes 12 and 13, so that no protrusions are formed on the surfaces of the safety bars 7 and 8 and the clue bar 5, and there is no risk of injury to the operator's body or hooking clothes. .

In this case, according to the present invention as set forth in claim 4, by separating the bracket 9 from the pivot 10, the girder-side safety bar 7A (7B) can be removed from the clasp bar 5, so that the telescopic structure of the nesting type Maintenance of the girder-side safety bar 7A (7B) is facilitated.

Furthermore, according to the present invention as set forth in claim 5, when the wife-side safety bar 8A (8B) is stored so as to overlap the inner side surface 5ay of the clue bar 5, both side surfaces of the clasp bar 5 are clamped by the clamping portion 15d. Since it is pinched and self-held so as not to rotate, it is not necessary to provide a rotation prevention means with a separate component, and it is possible to provide an inexpensive configuration with a small number of components. At this time, the pinching and pinching by the pinching portion 15d are made possible by bending the flexible wire constituting the wife-side safety bar 8A (8B). Also in this respect, the number of parts is small. An inexpensive configuration can be provided.

It is a front view showing a work table concerning one embodiment of the present invention. The perspective view which shows one Embodiment of this invention and shows the state which connected the cue stick adjacent on the girder side of a top plate with the girder side safety bar, and connected the cue stick adjacent on the wive side of the top plate with the wives side safety bar. FIG. It is a perspective view which expands and shows the clue bar adjacent regarding the wife side of a top plate, a girder side safety bar, and a wife side safety bar. It is a perspective view which shows the state which contracted the girder side safety bar in the state which made the wife side safety bar the horizontal attitude | position. It is a perspective view which shows the state which rotated the wife side safety bar and the girder side safety bar from the horizontal posture to the hanging posture. It is a perspective view which shows an effect | action when the wife side safety bar is rotated from a horizontal attitude | position to a drooping attitude | position. The action of the receiving means provided in the top part of the fixing means provided in the tip part of the girder side safety bar and the clue bar is shown, (A) is a sectional view showing the action when the fixing means is inserted into the receiving hole. B) is a sectional view showing a fixed state after insertion. The action of the receiving means provided in the inner surface of the fixing means provided on the tip part of the girder-side safety bar and the clue bar is shown, (A) is a sectional view showing the action during the insertion of the fixing means into the receiving hole, B) is a sectional view showing a fixed state after insertion. The relationship between the locking means provided in the bracket of the girder-side safety bar and the locked means of the wife-side safety bar is shown, and (A) is a front view showing a state in which the locked means is locked to the locking means. The figure and (B) are the AA arrow line views of (A). The action of the bracket of the girder side safety bar is shown, (A) is a front view showing a state where it is rotated from a horizontal posture to a hanging posture, and (B) is a cross-sectional view showing the relationship between the pivot piece of the bracket and the shaft member. It is. It is the front view which shows the raising / lowering mechanism of the cue stick, and shows the state which raised the cue stick from the main leg. It is a side view which shows the state which looked at the raising / lowering mechanism in the state which raised the clue stick from the F direction of FIG. 11 in a partial cross section. It is the front view which shows the raising / lowering mechanism of the clue stick, and shows the state which stored the clue stick toward the main leg. It is a side view which shows the raising / lowering mechanism in the state which stored the clue stick in a partial cross section.

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

(Overall configuration)
The workbench of the present invention is a general-purpose workbench widely including various types used for work at a high place in a construction site or the like, and therefore the shape and size thereof are not particularly limited. FIG. 1 shows one embodiment. In the case of the illustrated embodiment, the work table 1 includes a substantially rectangular top plate 2, and as shown in FIG. 2, the sides along the X direction located at both ends in the longitudinal direction are the wife sides x1 and x2, and the longitudinal direction The main legs 3 are respectively provided on the wife sides x1 and x2 of the top board 2 with the sides along the Y direction located on the both side edges of the stool being the girder sides y1 and y2. Although not shown in detail, each main leg 3 is configured in a ladder shape in which a step is installed on a pair of leg main bodies 4, 4. With the extension legs contracted, the main legs 3 and 3 are configured to be retractable by rotating the main legs 3 and 3 toward the lower side of the top plate 2 as shown by an arrow R in FIG. Yes.

A total of four clue bars 5 are provided in the vicinity of the corners of the top plate 2 and stand upwardly from the top plate 2, and the clue rods 5 have their lower ends at the main legs 3. The leg main body 4 is attached to the outer surface of the leg main body 4 via a raising / lowering mechanism 6. As shown in FIG. 2, the four clue bars 5 are arranged in the first hand clasp bar 5a, the second clue bar 5b, The three clue bars 5c are arranged in order, and further, the third clue bar 5c, the fourth clue bar 5d, and the first clue bar 5a are arranged in order from the wife side x2 to the girder side y2. Accordingly, in the illustrated case, the first clasp bar 5a and the second clasp bar 5b are adjacent to each other on one wife side x1, and then the second clasp bar 5b and the second clasp bar on one girder side y1 adjacent in the clockwise direction. The third clue bar 5c is adjacent to each other, and the third clasp bar 5c and the fourth clue bar 5d are next to each other on the other wife side x2 adjacent in the clockwise direction, and the other adjacent in the clockwise direction. The fourth clue bar 5d and the first clue bar 5a are arranged adjacent to each other on the beam side y2.

In a state where the four clue bars 5 are erected, the second clasp bar 5b and the third clasp bar 5c adjacent to each other with respect to the girder side y1 are connected by a girder side safety bar 7A, and are mutually connected with respect to the girder side y2. Adjacent third clue bar 5c and first clue bar 5a are connected by a girder-side safety bar 7B. Further, the first clue bar 5a and the second clue bar 5 that are adjacent to each other with respect to the wife side x1 are connected by a wife side safety bar 8A, and the third clue bar 5c and the fourth clue that are adjacent to each other with respect to the wife side x2. The bar 5d is connected by a wife-side safety bar 8B.

The wife-side safety bars 8A, 8B are pivotally connected to one of the handle bars 5a, 5c of the handle bars 5 adjacent to each other in the X direction so that the proximal ends of the wife-side safety bars 8A, 8B can be rotated. The end portions of the wife-side safety bars 8A and 8B face the other clasp bars 5b and 5d, and are fixed by being detachably locked. The girder-side safety bars 7A and 7B are arranged on the girder-side safety bars 7A and 7B on the cue-bars 5b and 5d facing the end portions of the wive-side safety bars 8A and 8B, respectively. The proximal ends of the girder-side safety bars 7A and 7B are engaged with and disengaged from the clasp bars 5c and 5a to which the proximal ends of the wives-side safety bars 8A and 8B are pivotally coupled. It is fixed by freely locking.

Since the pair of girder-side safety bars 7A and 7B have the same configuration, the girder-side safety bar 7A on the girder-side y1 will be described below, and the description of the girder-side safety bar 7B on the girder-side y2 will be omitted. Similarly, since the pair of wife-side safety bars 8A and 8B have the same configuration, the wife-side safety bar 8A of the wife-side x1 will be described below, and the description of the wife-side safety bar 8B of the wife-side x2 will be omitted. To do.

(Configuration of girder side safety bar)
The girder-side safety bar 7A has an expansion / contraction structure formed by an expansion / contraction tube in which a thin tube 7a, an intermediate tube 7b, and a thick tube 7c are slidably inserted into each other, and a bracket provided at the proximal end of the thin tube 7a. 9 is pivotally connected to the vicinity of the upper end portion of the second clue bar 5b by a pivot 10 having an axis in the X direction, and is rotatable between a hanging posture and a horizontal posture. Accordingly, the girder-side safety bar 7A can be in the extended state shown in FIGS. 2 and 3 and the contracted state shown in FIG. 4. When the girder-side safety bar 7A is in the horizontal position in the extended state, it is placed on the top of the third clue bar 5c. By inserting and locking the protruding locking means 11 provided at the distal end portion of the thick tube 7c in the provided receiving hole 12, it is detachably fixed. Further, when the girder-side safety bar 7A is in the contracted state and is changed from the horizontal posture shown in FIG. 4 to the hanging posture shown in FIG. 5, the inner side surface 5by (third hand hook rod 5c) directed in the Y direction of the second hook rod 5b. And can be removably fixed by inserting and locking the protruding locking means 11 in the receiving hole 13 provided in the corresponding portion of the inner side surface 5by.

(Composition of wife safety bar)
As shown in FIGS. 3 to 6, the wife-side safety bar 8A is pivotally connected to the first handle bar 5a by a pivot 14 having an axis in the Y direction so that the wife-side safety bar 8A can be rotated horizontally. It can be rotated between postures. Therefore, when the wife-side safety bar 8A is in a horizontal posture as shown in FIGS. 3 and 4, the distal end portion faces the second clasp bar 5b, and the locking means 15 of the distal end portion is a bracket described later. 9 is locked and fixed to the locking means 25 detachably. Further, when the wife-side safety bar 8A is in the hanging position as shown in FIGS. 5 and 6, it overlaps with the inner side surface 5ay (the side surface facing the fourth clue bar 5d) facing the Y direction of the first clue bar 5a. And can be detachably locked and fixed by clamping both side surfaces of the first clasp bar 5a by a clamping portion 15d described later.

In the illustrated embodiment, the wife-side safety bar 8A is formed by bending one flexible wire, preferably a flexible steel wire with elasticity, and is substantially the same as one wire. With the central portion serving as a connecting line portion 15a, two end portions of the connecting line portion 15a are bent at substantially right angles to form two linear portions 15b and 15c that are separated from each other and extend substantially in parallel. The pivot plate 16 is connected to the tail ends of the strips 15b and 15c by welding or the like, and further, the middle portions of the linear strips 15b and 15c are bent in a substantially concave shape in the Y direction. Thus, the sandwiching portions 15d and 15d are formed, and the flexible portions 17 that are flexibly deformable are constituted by the linear portions 15b and 15c extending from the sandwiching portion 15d toward the pivotal support plate 16, and the connecting wire portions The upper and lower linear portions 15e, 15e connected to the upper and lower ends of 15a Chi, constitute a latched means 15 by the upper linear portions.

In the case of the illustrated example, the pivot plate 16 is pivotally attached to the vicinity of the upper end of the first clasp bar 5a via the pivot shaft 14, and the pivot plate 20 is overlapped with the inner surface 5ay of the first clasp bar 5a. In this state, the wife-side safety bar 8A is configured to be rotatable. The pivotable configuration may be such that the pivot plate 16 is pivotable with respect to the fixed pivot 14 or the pivot 14 fixed to the pivot plate 16 is rotated with respect to the first clasp bar 5a. It may be movable.

When the wife-side safety bar 8A is in a horizontal posture, the connecting line portion 15a and the locked means 15 are made to face the second clasp bar 5b, and the locked means 15 is placed on the girder-side safety bar 7A as described later. The bracket 9 is locked and fixed so as to be detachable.

As shown in FIG. 6, the locking means 15 is made to escape from the locking means of the bracket 9 and, as shown in FIG. 6, the wife-side safety bar 8A is rotated downward so that the connecting line portion 15a faces downward. Then, the line portions 15b and 15c approach the first clue bar 5a. Therefore, when the flexible portion 17 is deformed and the connecting line portion 15a is made to face the inner surface 5ay of the first clue bar 5a and the flexible portion 17 is restored as shown by the chain line in the figure, as shown by the solid line in the figure. The clamping portion 15d clamps both side surfaces of the first clue bar 5a and prevents the wife-side safety bar 8A from rotating. As a result, the connecting line portion 15a and the line portions 15b and 15c overlap the inner side surface 5ay of the first clue bar 5a, and the wife-side safety bar 8A is in the retracted state.

When the wife-side safety bar 8A is rotated from the retracted state to a substantially horizontal position and the pair of clue bars 5a and 5b are connected, the opposite operation may be performed.

In the case of the illustrated embodiment, the wife-side safety bar 8A is formed by bending a flexible wire such as a single steel wire, so that it can be produced at a low cost and substantially parallel. Since the linear portions 15b and 15c extending in the direction are provided, sufficient strength can be ensured even if the material is a thin wire, and the operator can easily hold it in the hand and the operability is improved.

At this time, when there is anxiety about the strength due to the flexibility of the linear portions 15b and 15c, the illustration is omitted, but one or a plurality of connecting plates for connecting arbitrary portions of the linear portions 15b and 15c to each other May be provided. Thus, by selecting the fixing position and the number of connecting plates, the flexibility of the flexible portion 21 is changed in strength, so that it can be configured to have appropriate flexibility.

(Structure of protrusion locking means for girder side safety bar)
The girder-side safety bar 7A is extended from the thin tube 7a fixed to the bracket 9 pivoted to the second clue bar 5b by successively feeding out the middle tube 7b and the thick tube 7c, and in a substantially horizontal state. Then, the protrusions and locking means 11 at the tip of the thick tube 7c are detachably locked and fixed in the receiving hole 12 at the top of the third clasp bar 5c.

As shown in FIG. 7, the protrusion locking means 11 is formed of a spring material 18 such as a leaf spring, and a fixed end portion 18a fixed by a fixing means 19 such as a rivet inside the distal end portion of the thick tube 7c. And an expansion / contraction portion 18b that protrudes from the thick tube 7c toward the top of the third clasp bar 5c by bending the spring member 18 in a folded shape, and toward the inside of the large tube 7c from the expansion / contraction portion 18b. An extended free end 18c is provided. The expansion / contraction portion 18b is elastically urged in the expansion direction, and is provided with a guide portion 18d that gradually inclines in the expansion direction from the tip toward the free end portion 18c. A locking portion 18e that is bent inwardly toward the free end portion 11c is formed.

The free end portion 18c is provided with a button-like operation piece 18f. The operation piece 18f is inserted through a cap 20 fixed to the end portion of the thick tube 7c and protrudes to the outside.

On the other hand, the receiving hole 12 is formed in the flat plate portion of the cap 21 that covers the top portion of the third clue bar 5c formed hollow. Therefore, as shown in FIG. 7A, when the extended girder-side safety bar 7A is moved downward with the distal end portion of the protruding locking means 11 facing the receiving hole 12, the guide portion By sliding 18 d in contact with the edge of the receiving hole 12, the expansion / contraction part 18 b is contracted and inserted into the receiving hole 12. When the locking portion 18e is inserted into the receiving hole 12 together with the expanding / contracting portion 18b, the expanding / contracting portion 18b expands, and the locking portion 18e is inserted into the edge of the receiving hole 12 from the inside as shown in FIG. By locking, the protruding locking means 11 is locked to the receiving hole 12 in a retaining manner.

Thus, the front end of the girder-side safety bar 7A is moved to the third clasp bar by a one-touch operation of moving downward from the state in which the protruding locking means 11 faces the receiving hole 12. It is automatically locked and fixed to the upper end of 3c.

To release the locking from this state, the girder-side safety bar 7A may be lifted in a state where the expansion / contraction part 18b is contracted by pushing the operating piece 18f.

When the girder-side safety bar 7A is moved toward the bracket 9 while holding the thick tube 7c with the tip end of the large tube 7c lifted from the receiving hole 12 and with the tip of the thick tube 7c lifted, The middle tube 7b and the narrow tube 7a are sequentially inserted into the tube 7c and contracted as shown in FIG. Therefore, when the contracted girder-side safety bar 7A is rotated downward via the pivot 10 of the bracket 9, as shown in FIG. 5, it is in a suspended position and overlapped with the inner surface 5by of the second clue bar 5b. It is done. Under the present circumstances, the receiving hole 13 which inserts the said protrusion latching means 11 is opened in the lower position of the 2nd clue bar | burr 5b.

As shown in FIG. 8 (A), the receiving hole 13 is opened on the wall surface of the inner surface 5by of the second clue bar 5b formed in a hollow shape, and the girder-side safety bar 7A in a contracted state is suspended. The protrusion locking means 11 that moves forward toward the receiving hole 13 contracts the expanding / contracting portion 18b by sliding the guide portion 18d in contact with the edge of the receiving hole 13. As soon as it is inserted into the receiving hole 13 and the locking part 18e is inserted into the receiving hole 13 together with the expanding / contracting part 18b, the expanding / contracting part 18b expands, and as shown in FIG. By locking the edge of the receiving hole 13 from the inside, the protruding locking means 11 is locked to the receiving hole 13 in a retaining manner.

As described above, the tip of the beam-side safety bar 7A is automatically engaged with the inner surface 5by of the second handle bar 5b by one-touch operation of rotating the beam-side safety bar 7A from the horizontal posture to the hanging posture. Stop and fix.

In order to release the locking from this state, the girder-side safety bar 7A is moved away from the inner surface 5by of the second handle bar 5b in a state where the expansion / contraction portion 18b is contracted by pushing the operating piece 18f. good.

(Configuration of girder side safety bar bracket)
As described above, the girder-side safety bar 7A has a horizontal posture and a hanging posture by pivoting the bracket 9 provided at the proximal end portion of the narrow tube 7a to the vicinity of the upper end of the second clue bar 5b via the pivot shaft 10. It can be freely rotated between the two.

As shown in FIGS. 9 and 10, the bracket 9 is fixed to the narrow tube 7 a of the spar-side safety bar 7 </ b> A by a fixing tool 22 such as a bolt and a nut, and extends from the fixing part 23. A pair of pivot pieces 24, 24 and a locking means 25 extending from the pivot pieces 24 are provided. In the illustrated embodiment, the locking means 25 is a pair extending in parallel from the pivot pieces 24, 24. And a notch-like recess 27 is formed between the hook piece 25 and the pivot piece 24.

The pivot pieces 24, 24 are inserted into the pivot holes 24a formed in the pivot pieces 24, 24 while holding both side surfaces in the X direction of the second clasp bar 5b. 9A, when the fixing portion 22 of the bracket 9 is in a horizontal posture, the hook piece 25 is illustrated from the inner side surface 5by of the second clue bar 5b. As shown in FIG. 10 (A), the hook piece 25 is protruded to the operating position and when the fixing portion 22 of the bracket 9 is in the suspended position along the inner surface 5by of the second clasp bar 5b. Is retracted from the operating position and is in a lateral orientation. In the retracted state, the hook piece 25 may slightly protrude from the inner side surface 5by. However, unlike the illustrated embodiment, the hook piece 25 does not protrude from the inner side surface 5by, and the hook piece 25 and the pivot piece 24 are the second clues. It is preferable that the rod 5b is configured to be accommodated within the width of both side surfaces.

In the illustrated embodiment, as shown in FIG. 10 (A), the pivot shaft 10 is composed of a pair of shaft members 10a, 10a provided on both side surfaces of the second handle rod 5b so as to be able to protrude and retract. It is urged so as to protrude from both side surfaces of the second clasp bar 5b by urging means 28 formed by a leaf spring or the like housed inside 5b.

Therefore, as shown by a chain line in FIG. 10A, when the pair of shaft members 10a and 10a is inserted into the inside from both side surfaces of the second clasp bar 5b against the biasing means 28, the pivot piece 24 can be separated from the shaft member 10a, and the bracket 9 can be detached from the second clue bar 5b.

(Bracket locking means and wife side safety bar locked means)
As described above, when the girder-side safety bar 7A is in a horizontal position in the extended state, the hook piece 25 constituting the locking means 25 of the bracket 9 protrudes from the inner surface 5by of the second clasp bar 5b to the operating position. Therefore, in this state, as shown by a chain line in FIG. 9A, the locking means 15 of the wife-side safety bar 8A in a horizontal posture is inserted and locked into the recess 27 formed by the hook piece 25. Thus, the wife-side safety bar 8A can be locked and fixed in a horizontal posture.

From this state, in order to release the locking of the tip of the wife-side safety bar 8A and rotate the wife-side safety bar 8A to the hanging position, the hooked means 15 is lifted to raise the hook. In the illustrated embodiment, if the bracket 9 is rotated so that the fixing portion 22 faces downward as shown by an arrow in FIG. 10A, the hook piece 25 is moved up and down. It is configured to pass through the linear portions 15e, 15e and to retract and to release the locked means 15. Accordingly, in the illustrated embodiment, as shown in FIG. 9B, a space S that allows the hook piece 25 to pass as described above is formed by the interval between the upper and lower linear portions 15e, 15e.

(Safety bar action)
As described above, the working table 1 of the illustrated embodiment connects a pair of cue sticks adjacent to each other with respect to the spar side by the extended spar side safety bars 7A and 7B, and a pair of adjacent side bars with respect to the wife side. Since the clue bar is connected by the wife-side safety bars 8A and 8B, the work can be safely performed on the top plate 2. At this time, the girder-side safety bars 7A and 7B are in a stretched state and set in a horizontal posture, and are held in a connected state by a one-touch operation of inserting the protruding locking means 11 into the receiving hole 12. 8A and 8B hold the connected state by a one-touch operation of locking the locked means 15 to the locking means 25 projected to the operating position of the bracket 9 in a horizontal posture.

When the work table 1 is not in use, if the protruding locking means 11 is removed from the receiving hole 12 and the girder safety bars 7A and 7B are contracted and rotated so as to be in a suspended position, the girder safety bar 7A and 7B overlap with the respective clue bars 5b and 5d, and at the same time, the protruding locking means 11 is inserted and locked into the receiving hole 13, so that the hanging position is automatically maintained. Further, the wife-side safety bars 8A and 8B are rotated so as to be in the hanging posture after the locked means 15 is released from the locking means 25 of the bracket 9, and the clasps 15d and 15d respectively hold the clues. If the bars 5a and 5c are clamped, the hanging position is maintained. Thus, in the state where the girder-side safety bars 7A, 7B and the wife-side safety bars 88A, 8B are overlapped and held on the respective clue bars 5, all the clasp bars 5 are attached to the leg bodies 4 of the main legs 3. By making it turn upside down, compact storage is possible.

(Inverting mechanism configuration)
11 to 14 show details of the inversion mechanism 6 of the clue bar 5. A support member 29 having a cross-sectional groove shape that opens inward in the Y direction is fixed to a side surface of the upper end portion of the leg main body 4 in the main leg 3, and an upper portion of the support member 29 (in the case of the illustrated example, The upright holding part 30 is constituted by the upper half part, and the inverted holding part 31 is constituted by the lower part (lower half part in the case of the figure).

The clue bar 5 (the second clue bar 5b in the drawing) has a lower end portion inserted into the support member 29 and is pivotally connected to the support member 29 by a pivot 32, and rotates around the pivot 32 as a fulcrum. 11 and FIG. 12, it is inserted into the upright holding portion 30 when it is erected, and as shown in FIGS. 13 and 14, it is inserted into the inverted holding portion 31 when it is inverted.

A lock pin 33 for fixing the hand rod 5 to the support member 29 in the standing state and the inverted state is provided. The lock pin 33 is provided in the vicinity of the lower end of the clasp bar 5 so as to penetrate forward and backward from the outside to the inside, and is normally urged by a spring 34 so as to insert the tip.

As shown in FIG. 12, when the clue bar 5 is erected and fitted into the upright holding portion 30, a cutout portion 30a for receiving the neck portion of the lock pin 33 is provided on the outer wall of the upright holding portion 30, and the inner wall is provided with an inner wall. A locking hole 30b for inserting and locking the tip of the lock pin 33 is provided. The inner wall is provided with a guide tongue 30c in the vicinity of the locking hole 30b. When the clue bar 5 enters the upright holding portion 30, the tip of the lock pin 33 is opposed to the spring 34 by the guide tongue 30c. When the tip of the lock pin 33 is aligned with the locking hole 30b, the spring 34 is advanced by the spring 34 and automatically locked in the locking hole 30b.

As shown in FIG. 14, when the clue bar 5 is inverted and inserted into the inverted holding portion 31, a cutout portion 31a for receiving the neck portion of the lock pin 33 is provided on the outer wall of the inverted holding portion 31, and the inner wall is provided with an inner wall. A locking hole 31b for inserting and locking the distal end portion of the lock pin 33 is provided. The inner wall is provided with a guide tongue 31c in the vicinity of the locking hole 31b. When the clue bar 5 enters the inverted holding part 31, the guide tongue 31c opposes the tip of the lock pin 33 against the spring 34. When the tip of the lock pin 33 matches the locking hole 31b, the spring 34 is advanced by the spring 34 and automatically locked in the locking hole 31b.

A knob 33a is provided on the head of the lock pin 33. When the lock pin 33 and the locking holes 30b and 31b are unlocked, a knob 33a provided on the head of the lock pin 33 is provided. By gripping, the tip of the lock pin 33 may be retracted from the locking holes 30b and 31b against the spring 34.

DESCRIPTION OF SYMBOLS 1 Worktable 2 Top plate 3 Main leg 4 Leg main body 5 Cue stick 5a 1st cue stick 5ay Inner side surface 5ax Both side surfaces 5b Second cue bar 5by Inner side surface 5bx Both side surfaces 5c 3rd cue bar 5d 4th cue rod 6 Mechanism 7 (7A, 7B) Girder-side safety bar 8 (8A, 8B) Wife-side safety bar 9 Bracket 10 Axis 10a Axis member 11 Projection locking means 12 Receiving hole 13 Receiving hole 14 Axis 15 Locked means 18 Spring material 18f Operation piece 23 Adhering portion 24 Pivoting support piece 25 Locking means 26 Hook piece 27 Recess 28 Energizing means

Claims (5)

A cue rod (5) having a wife side along the X direction and a girder side along the Y direction and located near the top of the top plate and standing up above the top plate is provided. In a work table in which a pair of adjacent clue bars are connected by a wife-side safety bar (8) and a pair of clue bars adjacent to each other with respect to the girder side are connected by a girder-side safety bar (7),
The girder-side safety bar (7) has a bracket (9) fixed to the base end so that it can rotate between a hanging position and a horizontal position near the upper end of a predetermined clue bar (5b). When it is pivoted and in a suspended position, it is locked and fixed along the hand bar (5b) so that it can be freely engaged and disengaged, and in the horizontal position, the tip is engaged with and disengaged from the other clue bar (5c). It is configured to lock freely,
The proximal end of the wife-side safety bar is pivotally connected to the vicinity of the upper end of a predetermined clue bar (5a) so that the wife-side safety bar (8) is rotatable between a hanging position and a horizontal position. It is configured so that it can be detachably locked along the hand rod (5a) when it is in the hanging position, and the tip end part faces the bracket (9) when it is in the horizontal position. And
The bracket (9) of the girder-side safety bar (7) has a Y-direction inner surface (5by) of a predetermined clue bar (5b) to which the bracket is pivoted when the girder-side safety bar is in a horizontal posture. Locking means (25) that protrudes from the operating position when projecting from the operating position when the girder-side safety bar is in a suspended position,
The distal end portion of the wife-side safety bar (8) is locked so as to be detachably engageable with the locking means (25) protruding to the operating position in a state where the wife-side safety bar is in a horizontal posture. A workbench characterized by comprising means (15). The bracket (9) constitutes the locking means (25) by extending a hook piece (26) from a pivot piece (24) pivoted to a predetermined clue bar (5b), The hook piece (26) is configured to be in an upward posture when the girder-side safety bar is in a horizontal posture and configured to be in a lateral posture when the girder-side safety bar is in a hanging posture. Item 4. The workbench according to Item 1. The girder-side safety bar (7) constitutes a telescopic structure formed by a telescopic telescopic tube, and is a projecting locking means (11) that can be expanded and contracted at the distal end and is always elastically biased in the expanding direction. Has been established,
When the girder-side safety bar is in a horizontal position in an extended state, the protruding locking means (11) is detachably locked to a receiving hole (12) provided on the top surface of the other clue bar (5c). When the girder-side safety bar is in the contracted position, the protruding locking means (11) is provided with a receiving hole (13) provided on the inner side surface (5by) in the Y direction of the predetermined clue bar (5b). 3. The work table according to claim 1, wherein the work table is configured to be detachably engaged with the work table. The bracket (9) includes a pair of pivot pieces (24, 24) for holding both side surfaces in the X direction of a predetermined clue bar (5b), and a pair of shaft members (10a, 10a) protruding from the both side surfaces. ) Are respectively pivotally pivoted by being inserted into pivot holes (24a) of the pivot pieces,
The pair of shaft members (10a, 10a) is provided so as to be able to protrude and retract on both side surfaces in the X direction of a predetermined clue bar (5b), and protrudes from both side surfaces via the biasing means (28). Energized,
When the pair of shaft members (10a, 10a) is immersed in the predetermined clue bar (5b) from the both side surfaces against the biasing means (28), the pivot piece (24) is a shaft member ( The workbench according to claim 1, 2 or 3, characterized in that it is configured to be separated from 10a). The wife-side safety bar (8) has linear portions (15b, 15c) formed by flexible wire members that are spaced apart in the vertical direction and extend in parallel, and each of the intermediate portions of the linear portions is in the Y direction. When the wife-side safety bar is in a suspended position, both side surfaces of a predetermined clue bar (5a) are attached by the clamping portion (15d, 15d). The worktable according to claim 1, 2, 3, or 4, wherein the worktable is configured to be sandwiched and the locked means (15) is configured by a tip portion of an upper line portion.

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