JP2023163472A - Aerial work platform with hand-pinch preventive function - Google Patents

Abstract

To provide a platform with a function of preventing a hand of an operator holding a handrail from being caught between the handrail and a structure, an installed facility when the operator works on the platform at a high place.SOLUTION: Support members 5 are detachably connected to any of vertical frame members 3, which are arranged with intervals in a circumference direction around a work floor 2 on which an operator gets on, and a handrail member 4, which is fixed to upper end parts of the vertical frame members 3. A protection frame member 6 supported by the support members 5 or integrally formed therewith is continuously or intermittently arranged while protruding above the handrail member 4 and overhanging toward an outer periphery of the work floor 2 along the handrail member 4.SELECTED DRAWING: Figure 1

Description

The present invention prevents the hand of a worker from getting caught between the handrail of the workbench and a structure or installed equipment when performing work on a workbench at a high location. The present invention relates to a workbench with a function to prevent hand pinching when working at high places.

A work platform (basket) that is supported vertically on a moving vehicle and is used for workers to work at high places has a structure that protects the work platform from shaking that occurs when the work platform is moved and when the worker performs work. To ensure safety, handrails for workers to grasp or to connect safety belts are continuously arranged in the circumferential direction of the workbench.

For example, if a worker is moving the workbench while holding the handrail, the worker may check the surrounding area while operating the control lever to move the workbench. There is a risk that the part of the hand that is gripping the device may come into contact with or collide with obstacles such as constructed structures (frameworks) or installed equipment.

In preparation for such a danger, there is a workbench in which a guard member is arranged below the handrail on the outer periphery of the handrail (see FIGS. 7 and 8 of Patent Document 1). There was a problem in which the danger when moving upwards was not resolved. When the work platform is raised, the hand gripping the handrail cannot be protected from relatively descending obstacles.

In contrast, by placing a movable handrail that can move along the handrail inside the original fixed handrail and using the original handrail as a guard member, obstacles can be avoided from hitting the hand. There is a method of attaching a guard member to the handrail that moves up and down on the outside of the handrail (see Patent Document 2).

On the other hand, in addition to a method of notifying the presence of an obstacle by fixing a rod-shaped body to the four corners of a workbench and visually confirming that the rod-shaped body has come into contact with an obstacle and deformed (see Patent Document 3), there is also a method of emitting light. There is a method of stopping movement of a workbench by using a light beam and a light receiver as a pair and detecting the interruption of the light beam (see Patent Document 4).

JP 2021-138504 (Claim 1, paragraphs 0018 to 0040, Figures 1 to 8) JP2021-88433A (Claim 1, paragraphs 0018 to 0030, Figures 1 and 2) JP 2020-93912 (Paragraphs 0050-0054, 0083-0094, Figures 1-4) JP-A-5-124800 (Claim 1, paragraphs 0014, 0024, Figures 2, 3, and 5)

Since workbenches, including traveling vehicles (high-altitude work vehicles), are sometimes used as leased products, the methods of Patent Documents 1 and 2 for fixing guard members to the handrails of workbenches constitute modification of workbenches. Therefore, it is difficult to be adopted and lacks versatility.

In Patent Document 3, the operator must always pay attention to whether the rod-shaped body is deformed or not, and it is impossible to avoid a collision if the operator overlooks it. In the method of Patent Document 4, the workbench is not stopped unless the worker assumes a specific posture, so it cannot be said that the safety of the worker is sufficiently ensured.

In view of the above background, the present invention proposes a workbench with a hand pinch prevention function for high-place work, which has a simple structure but can reliably prevent a worker's hand from being caught during work.

The work platform with a hand pinch prevention function for high-altitude work according to the invention according to claim 1 is supported on a traveling vehicle so as to be able to rise and fall freely, and has a work platform on which a worker stands and a space around the work platform in the circumferential direction. A workbench for high-altitude work, comprising a vertical frame member placed and arranged and fixed to the work floor at a lower end, and a handrail member fixed to the upper end of the vertical frame member and held by the worker,
a support member detachably connected to at least either the vertical frame member or the handrail member; and a support member supported by or integrated with the support member, protruding above the handrail member, and extending above the work floor. A structural requirement is to include a protective frame material that extends outward toward the outer periphery, is disposed continuously or intermittently along the handrail material, and has impact resistance.

There are two types of traveling vehicles (high-altitude work vehicles) that support workbenches: tire type in which tires roll on the road surface, and crawler type in which crawlers roll. There are two types of vehicles: truck-mounted and self-propelled. Lifting devices that support the workbench in a vertically movable manner include a boom type (hydraulic cylinder type) that moves up and down by extending and contracting in the axial direction, or a digging (telescopic) type, and a vertical lifting device that moves up and down by extending and contracting in the vertical direction like a pantograph. (scissor type) etc. "Elevating and lowering freely" refers to being able to move up and down mainly in the vertical direction, but also includes movement in the vertical direction accompanied by movement in the horizontal direction.

As shown in FIG. 1-(a), the workbench 1 includes at least a work floor 2, a vertical frame member 3 fixed to the work floor 2, and a handrail member 4 supported at the upper end of the vertical frame member 3. However, a horizontal frame member 7 may be constructed between adjacent vertical frame members 3, 3 and fixed to both vertical frame members 3, 3. The handrail members 4 are arranged continuously or intermittently in the circumferential direction of the workbench 1 (workfloor 2).

"Support member connected to at least either the vertical frame member or the handrail member" refers to the case where the support member 5 is connected to the handrail member 4 as shown in FIG. As shown in (a), the horizontal frame may be connected to the vertical frame member 3 or both, or the horizontal frame member 7 may be constructed between adjacent vertical frame members 3, 3. This means that it may be supported by the material 7. The support member 5 is used to position the protective frame member 6 above the handrail member 4 and on the outer peripheral side of the work floor 2.

"A support member that is detachably connected" refers to a state in which the support member 5 is connected to a frame component such as the vertical frame member 3 or handrail member that constitutes the frame 20 of the workbench 1, excluding the work floor 2. This means that it is possible to switch freely between the state and the state separated from the frame constituent material. Since the support member 5 can return to the state separated from the frame component, the protective frame member 6 supported by the support member 5 is also detachably connected to the frame component. Therefore, even if the support member 5 and the protective frame member 6 are connected to the frame constituent members, the workbench 1 is not modified, so that the versatility of the workbench 1 is ensured.

The support member 5 can be attached to and detached from the frame member by being held by a connector 9 or a clamp that is shaped to simultaneously hold (hold) frame members such as the handrail member 4 and the vertical frame member 3 and the support member 5. connected to. For example, when the axial direction of the frame constituent material and the axial direction of the support member 5 are perpendicular to each other as shown in FIGS. 1 to 3, the tubes such as cylinders are perpendicular to each other as shown in FIG. A shape-combined coupling 9 is used. "Combined" means, for example, that the two connector components 91, 91 are butted against each other so as to sandwich the handrail material 4 and the support member 5 as frame components at the same time, and are connected to each other. and the support member 5 are held simultaneously.

In the case of the example shown in FIG. 1, the connector 9 supports the handrail material 4 and the connector components 91, 91 each having a three-dimensional shape in which tubes (cylinders) are orthogonally crossed, for example, divided into two, as shown in (d). By assembling the members 5 so as to sandwich them therebetween and connecting them to each other with bolts 92 and nuts 93, the handrail material 4 and the support member 5 are connected and removably joined to both. The three-dimensional shape in which the cylinders are perpendicular to each other is the case where the cylinders are combined so that the axis of the support member 5 is orthogonal to the axis of the handrail material 4, as shown in FIG. The tubes may be combined so that the axis of the support member 5 and the axis of the handrail material 4 are in twisted positions with respect to each other. In the case of FIG. 1-(b) using the connector 9 shown in FIG. 1-(d), the axis of the support member 5 is orthogonal to (intersects with) the axis of the handrail material 4.

On the other hand, if the axial directions of the vertical frame member 3 and the support member 5 as frame constituent members are parallel as shown in FIG. A shape-combined coupling 9 is used. In this case, the connector 9 has a three-dimensional shape in which cylinders are arranged in parallel, for example, divided into two, and the connector components 91, 91 are combined so as to sandwich the vertical frame member 3 and the support member 5, and are connected to each other with bolts 92 or the like. Thus, while connecting the vertical frame member 3 and the support member 5, the vertical frame member 3 and the support member 5 are detachably joined to both.

"Protection frame material supported by or integrated with the support member" refers to a case where a protection frame material 6 separate from the support member 5 is supported by the support member 5, as shown in FIG. 1-(b). As shown in FIG. 3-(b), there are cases where the protective frame member 6 is integrated with the support member 5 and is a continuous member. In the latter case, the support member 5 also serves as the protection frame member 6, or the protection frame member 6 serves as the support member 5. When the protective frame material 6 is supported by the support member 5, the protective frame material 6 is directly supported by the support member 5, and the protective frame material 6 is directly supported by the support member 5, and the protective frame is attached to an intermediate member such as a connector 9 that is directly supported by the support member 5. The material 6 may be supported.

"Protruding above the handrail material and extending to the outer circumferential side of the work floor" means that the protective frame material 6 is placed above the handrail material 4 in a position that moves outward from the outer circumferential surface of the handrail material 4. say something Theoretically, this means that when the workbench 1 is viewed from above (as a plan view), the outer edge of the protective frame material 6 is located on the outer circumferential side than the outer circumferential edge of the handrail material 4, and is horizontal. It also means that the upper edge of the protective frame member 6 is located above the upper edge of the handrail member 4 when viewed from above (in elevation). When viewed in the horizontal direction (the axial direction of the handrail material 4), the support member 5 is in a state of inclination both with respect to the horizontal direction and with respect to the vertical direction, as shown in FIG. 1-(c).

However, since the handrail material 4 is actually used while being held by the worker, it is only necessary to insert the hand between the outer circumferential surface of the handrail material 4 and the inner circumferential surface of the protective frame material 6. It is necessary that the upper surface of the protective frame material 6 be located above the surface of the hand when gripping the handrail material 4, while ensuring a distance of . "Being able to insert your hand between the handrail material 4 and the protective frame material 6" means that the inner peripheral surface of the protective frame material 6 is located on the outer peripheral side of the surface of your hand when grasping the handrail material 4. It is. "Continuously or intermittently" means that the protective frame material 6 is arranged continuously in the circumferential direction along the handrail 4 material, excluding the section of the door 8, as shown in Figure 1-(a). In some cases, the parts are arranged discontinuously, as shown in FIG. 2-(a).

"Having impact resistance" means that when an obstacle comes into contact with or collides with the protective frame material 6, the protective frame material 6 will deform at least until the obstacle reaches the hand holding the handrail material 4. This means that even if the protective frame material 6 is deformed by the expected impact force, the obstacle will not come into contact with the hand. A cushioning material may be wrapped around the surface of the protective frame member 6 to reduce impact. In addition, in order to make it easier to distinguish it from the handrail material 4, the surface of the protective frame material 6 may be colored in a different color from that of the handrail material 4.

The protective frame material 6 is arranged above the handrail material 4 and at a position shifted to the outside of the handrail material 4 with respect to the work floor 2, so that it falls relatively when the work platform 1 rises. Since the protective frame material 6 can be brought into contact in advance with an obstacle and an obstacle that approaches the workbench 1 relatively when the workbench 1 moves in either direction while rising, the handrail The hand gripping the material 5 is protected from obstacles. Hand includes the fingers of the hand. When the workbench 1 rises or moves in either direction, the obstacle may come into contact with the protective frame material 6 before contacting the handrail material 4 of the workbench 1. Therefore, damage to the workbench 1 itself is also prevented.

The height direction position of the protective frame member 6 with respect to the handrail member 4 can be adjusted by making the support member 5 expandable and contractible in the axial direction as shown in FIG. 2-(c) (Claim 2). It can be freely adjusted within the elastic range. Since the protective frame member 6 is disposed above the handrail member 4 and outside the handrail member 4, the axial direction of the support member 5 is inclined with respect to the horizontal direction and the vertical direction. For this reason, as the support member 5 expands and contracts in the axial direction, the position between the protective frame members 6, which are located in directions that intersect with each other, may change. In such a case, the protective frame members 6, 6 in the intersecting directions are separated from each other as shown in FIGS. 2-(a) and (b).

The fact that the support member 5 is expandable and contractible in the axial direction means that, as shown in FIGS. 2-(c) and 6-(a), for example, as shown in FIGS. The inner member 51 and the outer member 52 are nested and coaxially overlapped, and by moving either the inner member 51 or the outer member 52 in the axial direction relative to the other, the entire support member 5 is extended. and says that it will shrink. Although FIG. 6-(a) shows an example in which the protective frame member 6 is extendable, the same structure is obtained when the support member 5 is extendable. Although FIG. 2-(c) shows a case where the support member 5 is composed of two inner members 51 and an outer member 52, there may be cases where there are three or more supporting member constituent members.

When the protective frame members 6, 6 arranged in the crossing direction are separated from each other, the ends of the adjacent protective frame members 6, 6 become discontinuous, and an obstruction occurs between the adjacent protective frame members 6, 6. Objects may get stuck. In such a case, by making the protective frame material 6 itself expandable and contractible in the axial direction (claim 3), continuity between the ends of the protective frame materials 6 in the intersecting direction is ensured, and the protection It becomes possible to prevent obstacles from entering the inside of the workbench 1 through the frame members 6, 6. The protective frame material 6 itself can be freely expanded and contracted in the axial direction, as shown in FIG. It becomes possible by being placed.

A support that is detachably connected to at least either the vertical frame or the handrail of a work platform for elevated work, which includes vertical frames arranged around the work floor and handrails supported by the vertical frames. In order to have the member support or integrate the protective frame material that protrudes above the handrail material and extends to the outer periphery of the work floor, the supporting member and the protective frame material can be either the vertical frame material or the handrail material. , or even if connected to the horizontal frame material, the workbench will not be modified, and the versatility of the workbench can be ensured.

In addition, since the protective frame material is placed above the handrail material at a position shifted to the outside of the handrail material, obstacles that fall relative to the work platform as it rises, and The protective frame material can be brought into contact with an obstacle that approaches the workbench relatively when moving in the direction of the workbench, and the hand of the worker who is grasping the handrail material can be protected from the obstacle. can.

(a) is a perspective view showing an example of the structure of a workbench when the protective frame material is continuously arranged along the handrail material, excluding the door section, and the support member is connected to the handrail material; (b) ) is an enlarged view showing the corner of the handrail material in (a), (c) is a cross-sectional view taken along line xx in (b), and (d) is the configuration of the connector used in (b). A perspective view showing an example, and (e) a schematic perspective view showing an example of a shape of a connector different from that in (d). (a) is a perspective view showing an example of the structure of a workbench when protective frame materials are disposed intermittently along the handrail material, including the door section, and the support member is connected to the handrail material; (b) ) is an enlarged view showing the corner portion of the handrail material in (a), and (c) is a sectional view taken along the line xx in (b) when the support member is expandable and contractable. (a) shows an example of the structure of a workbench in which protective frame materials are disposed intermittently along the handrail material, including the door section, and a support member that also serves as the protective frame material is connected to the handrail material. A perspective view, (b) an enlarged view showing a corner of the handrail material in (a), and (c) a cross-sectional view taken along the line XX in (b). (a) is a perspective view showing an example of the structure of a workbench in which the protective frame material is continuously arranged along the handrail material, excluding the door section, and the support member is connected to the vertical frame material; (b) ) is an enlarged view showing the corner of the handrail material in (a), (c) is a cross-sectional view taken along the y-y line in (b), and (d) is the configuration of the connector used in (b). It is a perspective view showing an example. (a) is a perspective view showing an example of the structure of a workbench when protective frame members are disposed intermittently along the handrail including the door section, and the support members are connected to the vertical frame members; (b) ) is an enlarged view showing the corner part of the handrail material in (a), and (c) is a cross-sectional view taken along the y-y line in (b). (a) is a plan view showing an example of the structure of the protective frame material in the section of the door shown in FIG. -x line sectional view, (c) is a yy line sectional view of (a), and (d) is a zz line sectional view of (a). In (a), protective frame material is intermittently attached to the handrail material of the work platform and the handrail material in the long side direction that expands and contracts in the horizontal direction (long side direction), and the work platform is A front view showing how it is supported by a lifting device, (b) a plan view of (a), and (c) a side view of (a).

FIG. 1-(a) shows a work floor 2 supported on a traveling vehicle 10 such as the one illustrated in FIG. A workbench for high-altitude work (hereinafter referred to as workbench) comprising a vertical frame member 3 fixed to the work floor 2 at the lower end and a handrail member 4 fixed to the upper end of the vertical frame member 3 and held by the worker. An example of configuration 1 is shown below. The workbench 1 is placed on and fixed to a lifting device 11 supported on a traveling vehicle 10 as shown in FIG. 7-(a), so that it is supported by the traveling vehicle 10 so as to be movable up and down. In each of the following figures (a) in FIG. 1-(a), the operating panel for operating the movement of the workbench 1, including the lifting and lowering of the lifting device 11, and the lifting device 11 are omitted.

The workbench 1 includes a support member 5 that is detachably connected to at least either the vertical frame member 3 or the handrail member 4, and is supported by or integrated with the support member 5 and projects above the handrail member 4; In addition, a protective frame member 6 having impact resistance is provided, which extends to the outer circumferential side of the work floor 2 and is disposed continuously or intermittently along the handrail member 4.

If necessary to ensure the rigidity of the frame 20 consisting of the vertical frame members 3 and handrail members 4, horizontal frame members 7 may be installed between adjacent vertical frame members 3 and 3 as shown in FIG. 1-(a). is constructed and joined to both vertical frame members 3, 3. A door 8 for workers to enter and exit is arranged in a part of the frame 20 on the work floor 2. The door 8 is rotatably supported (opened and closed) by one of the vertical frame members 3 adjacent to the door 8, and connected to the other vertical frame member 3 so as to be lockable and unlockable. The vertical frame members 3 disposed at the corners of the frame 20 and the handrail members 4, 4, which are orthogonal to each other, are connected by a connector or clamp in the form of a combination of cylinders with their axial directions facing in three directions. or joined by welding, etc.

The door 8 has a form in which the horizontal frame member 7 of the door 8 is detachable from the vertical frame member 3 that constitutes the door 8, or the door 8 itself is attached to the vertical frame members 3, 3 located on both sides of the door 8 in the width direction. There are other types that slide up and down along the vertical frame member 3 and handrail member 4. In either type, the worker can freely go in and out of the workbench 1 through the door 8, regardless of the protective frame member 6 attached to the door 8.

In particular, FIG. 1-(a) shows the case where the protective frame material 6 is continuously arranged along the handrail material 4 except for the section (position) of the door 8, and the support member 5 is connected to the handrail material 4. Give an example. Depending on the part to be connected, the support member 5 can be connected by hand using a connector 9 as shown in FIGS. 1-(d) and (e), or a connector 9 or a clamp as shown in FIG. 4-(d). It is connected to the sliding material 4, the vertical frame material 3, or the horizontal frame material 7.

The vertical frame members 3, handrail members 4, and horizontal frame members 7 that make up the frame 20 of the workbench 1, as well as the support members 5 and protective frame members 6 that are detachably connected to the frame 20, are mainly made of steel pipes or squares. Steel pipes are used, but the form does not matter. These members themselves can be made of any material as long as they have a certain level of strength and rigidity; in addition to steel, hard plastics and the like can also be used.

In FIG. 1-(a), the support member 5 is connected to the handrail material 4 using the connector 9 shown in FIG. 1-(d), and the protective frame material 6 is connected to the support member 5 using the same connector 9. An example is shown below. In use, the connector 9 shown in FIG. The constituting connector components 91, 91 have a shape in which, for example, a three-dimensional shape obtained by combining cylindrical shapes is divided into two plane-symmetrical shapes or similar shapes with respect to the plane as a cutting surface. This connector 9 simultaneously surrounds the support member 5 and the protective frame member 6 shown in FIG. 1-(b).

The connector 9 shown in FIG. 1-(d) has a shape in which the axis of the cylinder on the support member 5 side is perpendicular to the axis of the cylinder on the handrail member 4 side, and the former cylinder abuts against the latter cylinder. The two connector components 91, 91 sandwich the support member 5 and the handrail material 4 between them, and the support member 5 is screwed onto the bolt 92 passing through the connector components 91, 91. and handrail material 4 at the same time, and connect both to each other. The connector 9 between the protective frame material 6 and the support member 5 is used when the axis of the cylinder on the support member 5 side is perpendicular to the axis of the cylinder on the protective frame material 6 side, and the former cylinder abuts the latter cylinder. Then, the support member 5 and the protection frame member 6 are grasped at the same time, and both are connected to each other.

When the connector 9 shown in FIG. 1-(e) is in use, the axis of the tube on the support member 5 side and the axis of the tube on the handrail material 4 (protective frame material 6) side are perpendicular to each other and are in a twisted position. It is formed into a three-dimensional shape by combining cylinders like this. In this example as well, the connector 9 is divided into two, for example, into connector components 91, 91 on a plane as a cut surface, and the connector components 91, 91 support the support member 5 and the handrail material 4 (protective frame material 6). The supporting member 5 and the handrail material 4 (protective frame material 6) are simultaneously gripped and connected by a bolt 92 and a nut 93 that pass through the two. In this example, the connector components 91, 91 do not have a shape that is divided into two plane-symmetrically with respect to the plane.

In FIG. 2-(a), the protective frame material 6 is disposed intermittently along the handrail material 4, including the section of the door 8, and the supporting member 5 is connected using the connector 9 shown in FIG. 1-(d). An example is shown in which the protection frame material 6 is connected to the handrail material 4 and the support member 5 is connected using a connector 9 of the same type. In this case, the axial end of the protective frame member 6 is held by the connector 9. FIG. 2-(c) shows an example in which the support member 5 has a multi-tube structure such as a double tube structure, and is freely expandable and contractible in the axial direction. Since the support member 5 is stretchable, the protection frame member 6 can be moved in parallel from the inside to the outside of the frame 20, and can also be moved in the opposite direction.

In the example shown in FIG. 2-(a), as a result of the protective frame material 6 being disposed intermittently along the circumferential direction of the handrail material 4 (frame constituent material), Although the protective frame material 6 is not placed, if the worker grasps the handrail material 4 located inside the section where the protective frame material 6 is placed, an obstacle approaches the area where the protective frame material 6 is not placed. Collisions with hands are avoided. If the protective frame material 6 is arranged continuously in the circumferential direction of the handrail material 4, or if the protective frame material 6 is made expandable and contractible as shown in FIG. 6, the approach of obstacles to the hand itself can be avoided.

In FIG. 3-(a), the protective frame material 6 is disposed intermittently along the handrail material 4, including the section of the door 8, and the supporting member 5 is connected using the connector 9 shown in FIG. 1-(d). Another example when connected to the handrail material 4 is shown. In this example, the protective frame member 6 is integrated with the supporting member 5 by forming the supporting member 5 into a U-shaped planar shape. In this case, by integrating the protective frame material 6 with the support member 5, the support member 5 also serves as the protective frame material 6, so that the steps shown in FIG. 1-(d) for connecting the protective frame material 6 to the support member 5, There is no need to use the connector 9 shown in (e).

In FIG. 4-(a), the protective frame material 6 is continuously arranged along the handrail material 4 except for the section of the door 8, and the supporting member 5 is connected using the connector 9 shown in FIG. 4-(d). An example is shown in which the protective frame member 6 is connected to the vertical frame member 3 and the support member 5 using the connector 9 shown in FIG. 1-(d). The connector 9 shown in FIG. 4-(d) has a three-dimensional shape in which cylinder shapes surrounding the support member 5 and the vertical frame member 3 are arranged in parallel as shown in (b) and (c). The constituting connector constituent members 91, 91 have, for example, a plane symmetrical about the three-dimensional shape with respect to the plane as a cutting surface, or a shape that is divided into two in a shape close to the plane.

The connector 9 in FIG. 4-(d) is formed into a three-dimensional shape in which tubes are combined so that the axis of the tube on the support member 5 side and the axis of the tube on the vertical frame member 3 side are parallel to each other in the used state. Ru. The connector components 91, 91 of this connector 9 also sandwich the support member 5 and the vertical frame 3, and the bolts 92 and nuts 93 passing through both grip and connect the support member 5 and the vertical frame 3 at the same time. .

In the example shown in FIG. 4-(a), the portion of the protective frame material 6 disposed along the short side direction of the frame 20 consisting of the two-way handrail materials 4, 4 is bent or curved. , and is continuous with the protective frame material 6 disposed along the handrail material 4 in the long side direction. In this relationship, it is sufficient to connect one support member 5 to the vertical frame member 3 disposed at a corner of the frame 20.

In the example of FIG. 4-(a), since the axes of the support member 5 held by the connector 9 and the vertical frame member 3 need to be parallel, the leg which is the section of the support member 5 closer to the vertical frame member 3 The portion 53 is bent parallel to the vertical frame member 3, and the leg portions 53 are arranged in parallel to the vertical frame member 3. Furthermore, in order to ensure the stability of the support member 5, connectors 9, 9 are arranged at two locations in the axial direction of the leg portion 53, and connected to the vertical frame member 3 at two locations.

In FIG. 5-(a), the protective frame material 6 is continuously arranged along the handrail material 4 except for the section of the door 8 and the corner portion of the frame 20, and the connector 9 shown in FIG. 4-(d) is shown in FIG. Another example will be shown in which the support member 5 is connected to the vertical frame member 3 using a connector, and the protective frame member 6 is connected to the support member 5 using a connector 9 shown in FIG. 1-(d). Here too, the leg portion 53, which is a section of the support member 5 closer to the vertical frame member 3, is bent, and then the leg portion 53 is arranged parallel to the vertical frame member 3. In this example, since the protective frame members 6 arranged in the short side direction of the frame 20 and the protective frame members 6 arranged in the long side direction are separated, the vertical frame members 3 arranged at the corners of the frame 20 Two supporting members 5 are connected to.

In the example shown in FIG. 5-(a), the portion of the protective frame member 6 disposed in the long side direction of the frame 20 near the door 8 is supported by the support member 5 in such a manner that it extends from the support member 5 toward the door 8. I'm letting you do it. Similarly, sections on both sides in the axial direction of the protective frame member 6 disposed in the section of the door 8 are also supported by the support member 5 so as to extend from the support member 5 to both sides of the door 8. Along with this, in order to make the protective frame material 6 arranged in the long side direction of the frame 20 continue even in the section of the door 8 when the door 8 is closed, as shown in FIG. The section and the protection frame material 6 of either side of the section are structured to be expandable and contractible in the axial direction.

In the case of the example shown in FIG. 5, the protection frame material 6 in either the section of the door 8 or the sections on both sides thereof is expandable, so that when the protection frame material 6 is contracted, when the door 8 is opened or closed, the section on both sides thereof is expandable. This means that interference with the protective frame material 6 is avoided. Even if the portion of the protective frame member 6 located in the long side direction of the frame 20 near the door 8 protrudes from the support member 5 toward the door 8 as shown in FIGS. 1-(a) and 4-(a). , if the protective frame material 6 arranged in the section of the door 8 does not protrude to both sides of the door 8, such as in a U-shape, and does not interfere with the protective frame material 6 in the both-side sections, There is no need for the protective frame member 6 to be expandable and contractible.

In Fig. 6-(a), two types of three steel pipes with different diameters as the protective frame component 61 are combined in the axial direction, and one of the steel pipes with the smaller diameter (protective frame component 61) is used with the larger diameter. It is inserted into a steel pipe (protective frame component 61) from the end to the middle and fixed, and the other steel pipe with a smaller diameter (protective frame component 61) is inserted into the other end of the larger diameter steel pipe in the axial direction. It is inserted so that it can move freely.

When this axially movable steel pipe with a small diameter protrudes from a steel pipe with a large diameter, it is inserted into the protective frame member 6 located on that side and temporarily fixed, so that it can be moved on both sides of the section of the door 8. The continuity of the protective frame material 6 is ensured. A steel pipe with a large diameter is used for the protective frame member 6 where the steel pipe with a small diameter protrudes from the steel pipe with a large diameter. Similarly, by making the axial ends of the protective frame members 6, 6 disposed at the long side ends and the short side ends of the frame 20 expandable and contractible, two directions in a discontinuous state can be formed. The protective frame members 6, 6 can be made continuous.

In FIG. 7-(a), an auxiliary frame 21 is attached to the frame 20, which is the main body of the workbench 1 supported by the lifting device 11 of the traveling vehicle 10, so as to be relatively movable in the long side direction, that is, toward the side extending from the frame 20. An example of a workbench 1 that can be expanded and contracted in the long side direction by being supported is shown. In this example, the protective frame member 6 is attached to the auxiliary frame 21 and the frame 20, and is attached to the auxiliary frame 21 at the portion that overlaps with the frame 20 when the auxiliary frame 21 is housed in the frame 20.

1... Workbench for working at heights,
2... Working floor, 20... Frame, 21... Auxiliary frame,
3...Vertical frame material,
4... Handrail material,
5...Supporting member, 51...Internal material, 52...External material, 53...Legs,
6... Protective frame material, 61... Protective frame material constituent material,
7...Horizontal frame material,
8...door,
9... Connector, 91... Connector component, 92... Bolt, 93... Nut,
10... Traveling vehicle, 11... Lifting device.

Claims (3)

A work floor supported on a traveling vehicle so as to be able to rise and fall and on which a worker stands; vertical frame members arranged at intervals in the circumferential direction around the work floor and fixed to the work floor at their lower ends; A work platform for working at high places, which includes a handrail fixed to the upper end of the vertical frame member and grasped by the worker,
a support member detachably connected to at least either the vertical frame member or the handrail member; and a support member supported by or integrated with the support member, protruding above the handrail member, and extending above the work floor. A workbench with a hand pinch prevention function for high-place work, characterized by comprising a protective frame material having impact resistance, which extends outward toward the outer periphery and is disposed continuously or intermittently along the handrail material, and has impact resistance. The workbench with a manual pinch prevention function for high-place work according to claim 1, wherein the support member is axially expandable and retractable. 3. The workbench with a manual pinch prevention function for high-place work according to claim 1 or 2, wherein the protective frame material is expandable and contractible in the axial direction.

Images