JP3415917B2 - Shut-off device between the cargo loading section and the passenger seat section of the transporter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutoff device provided for protecting an occupant at a boundary portion between a cargo loading portion and a passenger seat portion on a cargo bed of a carrier of a construction elevator.

[0002]

2. Description of the Related Art Conventionally, an elevator for long-span construction, which is widely used in construction sites and has a long cargo bed, usually has a driver's boarding position secured at the end of the long cargo bed, and It is loaded with long materials and carried to the required work floor of the building under construction. And
In general, safety measures are taken to prevent the materials and personnel mounted with handrails on the cargo bed from spilling from the top of the cargo carrier to the outside.

[0003]

However, in order to streamline materials and the like using an elevator for long-span construction work in recent years, in order to rationalize, a driver and other workers are boarded and lifted and lowered. Therefore, in order to cope with such a situation, it is necessary to cut off the cargo-carrying portion and the boarding portion (referred to as a passenger seat) of the cargo bed to improve safety. In particular, from the importance of work safety, the elevator structure standard based on the Occupational Safety and Health Regulations requires the provision of a blocking means between the cargo loading section of the cargo bed and the passenger seat.

However, in this long-span construction elevator, it is often inconvenient in operation if it is a fixed device for applying the above-mentioned shut-off means. In other words, when carrying out the unloading work of cargo, since the passengers come and go between the passenger seat and the cargo loading section, the blocking means becomes an obstacle,
Work will be damaged. Therefore, when the carrier is moved up and down, the cargo loading portion of the loading platform and the passenger seat are blocked by the blocking means, and the blocking is released during the loading and unloading work of the cargo so as not to impair the loading and unloading work of the cargo. If it is not recognized that the cutoff is being performed reliably, it is necessary to prevent the lifting operation.

In particular, the above-mentioned shut-off means is confirmed to be operating reliably during the shut-off operation, and the shut-off means is deliberately released during the raising and lowering of the carrier, or the shut-off means is actuated intentionally. It is required that the structure is such that the external operation is not performed and the interruption is not made.

The present invention solves the above-mentioned problems and provides a shutoff device for a cargo loading section and a passenger seat section of a carrier which can surely exert a shutoff function and can be constructed without complicating the structure. The purpose is to provide.

[0007]

[Means for Solving the Problems] Cargo-carrying section and passenger seat of a carrier according to the present invention configured to achieve such an object.
A barrier device to the passenger compartment is installed at the boundary position between the passenger seat section at the end of the carrier of the work elevator of the construction elevator and the other cargo-carrying section, and when the carrier is lifted or lowered
A passenger seat section that is designed to block the seat section from the cargo loading section;
A barrier device for the cargo loading section, in which the load is placed at the boundary position.
A pair of stanchions are erected on the table at required intervals, and one of the stanchions is supported.
The posts are pivoted to the base portion is mounted vertically pivotable blocking member, and the other strut before being attached to said post
Equipped with a receiving device that receives and locks the tip of the blocking member
In the vicinity of the pivot portion of the blocking member, signal transmitting means for detecting the position where the blocking member is in the blocking posture is provided , and the signal transmitting means is connected to the operation control section of the carrier. Is characterized by.

In the present invention, the shut-off member is a rod having a required length, and the shut-off member is formed around the pivot at the base end portion on the peripheral surface having different radial sizes between the shut-off position and the shut-off position. Is provided, a locking means capable of advancing and retracting is attached to the tip end of the blocking member, and a support body that supports the pivot of the base is attached to a column that is erected at one edge on the bed floor, A receiving member capable of engaging with and holding the locking means of the blocking member is attached to the upright supporting column at a position opposite to the column vertically crossing the boundary position of the carrier, and the blocking member is manually moved to the blocking position. It is preferable that the signal transmitting means is incorporated in the support so that the signal transmitting means can be operated up and down in the open position.

Further, the blocking member, the pivot thereof, the support, and the signal transmitting means for transmitting the blocking posture detected by the operating portion of the blocking member to the operation control unit of the transporter are unitary in structure. The unit structure and the receiving member capable of engaging and holding the locking means of the blocking member can be attached to a pair of upright columns standing at the boundary position between the passenger seat section and the cargo loading section of the carrier of the carrier. Is preferred. Further, it is preferable that the operation unit attached to the blocking member and the signal transmitting means for detecting a blocking posture of the blocking member and issuing a blocking signal are closed and cannot be operated from the outside. The locking means provided at the tip of the blocking member includes a locking piece provided in the tip of the hollow rod that is not detachable and is capable of moving forward and backward in the axial direction, the biasing elastic body, and the rod. It is composed of an operating grip that is fitted and that is connected so that the locking pin can be operated to move back and forth from the outside.

[0010]

According to the present invention, the vehicle is shut off at the boundary position between the cargo loading section of the carrier of the carrier and the passenger seat section on which the driver and the like board.
If the device is provided and the blocking member of the blocking device is tilted downward with respect to the pivot, the partition between the passenger seat section and the cargo loading section is removed, and the equipment on the platform is removed. When loading and unloading work, etc., the worker can come and go at the position without any hindrance. When loading and unloading equipment etc. is finished on the loading platform of the transporter and the lifting operation is started, the blocking member of the blocking device is rotated in the vertical direction to engage the tip of the blocking member with the receiver of the other support. Solidity
As a result, the signal transmitting means provided in the vicinity of the pivot of the blocking member can detect the blocking operation state of the blocking member and normally drive the elevator drive unit of the carrying device. Obviously, the operator who rides along with the driver who is in the passenger seat cannot move to the cargo loading section by the blocking member and can be safely held up and down. If the shut-off member is not properly held in the shut-off state and an operation is attempted, a signal from the signal sending means is not sent to the operation control unit, so that the elevator drive cannot be performed. Therefore, it is possible to drive the elevator up and down by securely hanging the blocking member over the receiving member of the other column, and it is possible to ensure safety. It should be noted that the blocking member does not obstruct the passage between the passenger seat part and the cargo loading part by removing the tip end part from the receiving part so as to be along the pillar and hanging down along the pillar on the mounting side by its own weight, for example.

When the blocking member is in the blocking state, the locking means assembled to the tip of the blocking member engages with and is held by a receiving member attached to a column at an opposite position on the bed floor. It is held without moving laterally. Therefore, even if the worker leans against the blocking member, the blocking function can be exerted without any trouble. When the blocking member is moved from the blocking state to the open state, the blocking member extends along the side of the supporting column to which the support body is attached, so that loading and unloading of cargo on the cargo bed is not hindered. In addition, the blocking member, its pivot axis, and the signal transmitting means for transmitting the blocking posture to the operation control unit of the transporter are unitized, so that they can be attached to and mounted on not only a stand but also a handrail or the like,
The work and handling of the shutoff device as a single unit are easy.
Moreover, since the main part of the shutoff operation signal transmission of the shutoff member has a closed structure, it is possible to prevent an operation from the outside, and to carry out the carrier without intentionally operating the shutoff function to perform the operation contrary to the purpose. You can drive safely.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a concrete example of a device for shutting off a cargo loading portion and a passenger seat portion of a carrier according to the present invention will be described with reference to the drawings.

FIG. 1 is a front view of an entire construction elevator provided with the breaking device of the present invention. FIG. 2 is a plan view of the passenger seat section. In these figures, the construction elevator 1 is a long-span construction elevator,
Elevating frames 4 and 4 are provided with a long carrier carrier 3 between two elevating supports 2 and 2 which are erected at a required interval so that the elevating supports 2 and 2 are vertically movable at both ends. Racks 2 attached to each lifting support body 2 by drive motors 5 mounted on both lifting frames 4 and 4.
a and 2a and a pinion (not shown) attached to the drive motor 5
It is configured such that the long carrier platform 3 can be moved up and down by the engagement drive with. A boarding space where a driver can board is provided as a passenger seat A on one of the elevating frames 4 side.

The passenger seat A of the carrier platform 3 is surrounded by guards and handrails 6 on three sides of the elevating frame 4 side and the longitudinal direction of the platform, and doors 8 for getting on and off are provided on two or one sides in the longitudinal direction. Is attached. A protective canopy 7 is provided above the passenger seat A. Then, at the boundary position between the passenger seat A portion and the cargo loading portion B as described above on the carrier platform 3, a blocking device 10 is provided longitudinally in the depth direction (short side direction) of the platform.

One specific example of the breaker device 10 is shown in FIGS. In these figures, the blocking device 10 is
The base is pivoted to one pillar 11 and the other pillar 12 of the passenger seat A section, which are erected on both side edges of the cargo floor 3a, and a support body 20 attached to the required height dimension position of the one pillar 11. A blocking bar 14 that is supported by 15 and is rotatable in the up-down direction, and that is locked and held when it is lifted in a horizontal state and the tip portion is engaged with a receiving tool 13 attached to the other column 12. At the base end of the blocking rod 14, the tip of the blocking rod 14 is correctly engaged and held by the receiving member 13 attached to the support column 12 when the blocking rod 14 is in the blocking state, and the lifting drive unit (driving unit) of the carrier is driven. The motor 5) is composed of a signal transmission means 25 for transmitting a signal to the operation control section 40 to enable the operation.

The blocking rod 14 is a metal pipe (preferably a steel pipe, a stainless steel pipe, an aluminum pipe, etc.) and has a length substantially equal to the depth dimension of the cargo bed 3. The blocking rod 14 has a boss 14 'integrally formed at the base end thereof, and a pivot 15 attached to the support 20 is inserted through the boss 14' in an orthogonal direction and formed into a box shape via the pivot 15. The base is rotatably supported in the vertical direction by the support 20. The base of the blocking rod 14 has a circumferential surface such that the radial dimension of the blocking rod 14 at the blocking position (horizontal state) from the center of rotation by the pivot 15 is different from the radial dimension when the blocking rod 14 is laid down downward. Is the operation portion 14A formed on the curved cam surface 14a. Further, a locking means 16 capable of advancing and retracting in the axial direction is incorporated in the tip portion of the blocking rod 14.

The locking means 16 is a blocking rod 14 made of a tubular body.
A locking piece 16b inserted coaxially at the tip of the coil spring 17 is urged by the insertion portion in the pipe so that a coil spring 17 is brought into contact with a flange 16a formed at an intermediate portion of the locking piece 16b so as to be constantly projected by a required amount. The locking piece 16b is provided with a tubular operation handle 18 which is connected to the blocking pin 14 by connecting the rear end portion of the engagement piece 16c and resists the thrust of the spring 17 biased by the operation handle 18. By retracting the locking piece 16b by means of this, the locking described later can be released. The operation handle 18 is configured to be slidable by a connecting pin 16c through a long hole 14b provided at the tip of the shutoff rod 14 along the axis without coming off. Further, if the outer periphery of the operating handle 18 is covered with a material having a flexible material such as rubber or soft plastic, it is convenient for handling.

The signal transmitting means 25 for detecting the shut-off state of the shut-off rod 14 is a bottom open type including a substrate having a mounting portion 21a mounted on the support 11 as a support 20 on the back and a cover attached to the substrate. It is provided inside a mounting box 21 formed in a box shape. As the signal transmission means 25, for example, a plunger type limit switch 26 is provided so that the roller-operated operation piece 27 of the limit switch 26 contacts the cam surface 14a forming the operation portion 14A of the shutoff rod 14 with the roller. And are fixed facing each other. Then, the limit switch 26 is electrically connected to the operation control unit 40 of the drive unit by a cable. The positional relationship between the cam surface 14a and the operation piece 27 with a roller of the limit switch 26 is set so that the blocking rod 14 is held at the blocking position when the limit switch 26 is off (of course, this The reverse is also possible).

Mounting box 21 configured as described above
Is provided with a notch in the blocking direction so that the base of the blocking rod 14 is supported by the pivot 15 so that the blocking rod 14 can be freely rotated at the lower part, and the blocking rod 14 is attached to the inside without impairing the operation of the blocking rod 14. The limit switch 26 and the operating portion 14A of the shutoff rod 14 thereof are configured to be protected from rainwater.

The receiving member 13 attached to the support column 12 has a mounting portion 33 to be mounted on the support column 12 on the back surface thereof, and the blocking bar is provided on one side thereof.
A fixed receiving metal 31 provided with a locking hole 32 for engaging the locking piece 16b at the tip of 14 is provided. The blocking rod 14 has such a height that it hits the waist of the occupant when the blocking means 14 is supported by the locking means 16 at the tip end by the receiving tool 13 attached to the column 12 and is in the blocking state. It should be set.

The shutoff device of this embodiment having the above-mentioned configuration
As described above, reference numeral 10 designates a boundary between the passenger seat A section of the carrier platform 3 and the cargo loading section B as described above, and the support body 20 of the blocking bar 14 is attached to the support pillar 11 and the support member 13 attached to the support pillar 12. Lift up the blocking rod 14 so as to bridge it, and retract the operating handle 18 of the locking means 16 at the tip of the blocking rod 14 (move it to the column 11 side) to receive the locking piece 16b attached to the column 12. When it is inserted and supported in the locking hole 32 of the tool 13, the cam surface 14a of the operation portion 14A of the base portion of the blocking rod 14 is rotationally displaced. Then,
The operation piece 27 with the roller of the limit switch 26, which has been pushed up when not in use by contacting the cam surface 14a, is returned (lowered), and the ON signal of the limit switch 26 causes the operation control section 40 of the carrier platform 3 to move. The drive command is given to the drive motor 5 from the drive motor 5, and the drive unit becomes operable.

Since the cargo loading section B and the passenger seat A section are blocked by the blocking rod 14 as described above, the occupant seated in the passenger seat A holds the cargo with the blocking rod 14 while the carrier is in operation. It becomes impossible to move to the mounting section B side. Therefore, while driving, the passenger seat A surrounded by the canopy 7 and the guard A
It is housed in the department and kept safe. If the shut-off rod 14 is not shut off correctly, the limit switch 26 is not turned on by the cam surface 14a of the operating portion 14A, so that the drive motors 5 and 5 of the transporter are not energized, and the operation is kept stopped.

As described above, the relationship between the limit switch 26 and the cam surface 14a of the operating portion 14A for detecting whether or not the shutoff state is present is that the shutoff rod 14 in the mounting box 21 of the support 20 is not shut down. When the limit switch 26 is pushed down, the operation piece 27 with a roller of the limit switch 26 is pushed up by the cam surface 14a to separate the contact point of the limit switch 26 from the contact piece. Since it cannot be closed, that is, it is not intentionally touched from the outside, malfunction can be prevented.

In order to release the interruption by the interruption rod 14, the operation handle 18 attached to the interruption rod 14 is retracted and the locking means 16
When the locking piece 16b is removed from the locking hole of the receiving tool 13 and the tip of the blocking rod 14 is lowered as it is, the blocking part hangs downward with the pivot 15 as a base point to open the blocking part. in this way,
If the blocking rod 14 is set to face downward when it is opened, it is safe because it is kept in a hanging state by its own weight.

In the above specific example, the operation of the shutoff rod 14 is detected by the combination of the cam (the cam surface 14a of the operating portion) and the plunger type limit switch 26. It is also possible to replace the rotary plate and the limit switch with a proximity switch, respectively. Alternatively, instead of the cam and the limit switch, a combination of a light blocking plate and a photoelectric switch can be adopted. In the case of a proximity switch, the detection position of the proximity switch has a detection part of the proximity switch projecting on the rotary plate side, and in the case of a photoelectric switch, a light-blocking plate is provided with a light-transmitting hole (light-transmitting part and light-receiving part). When (and are separate from each other), a reflection surface is formed only at the detection position so that the light receiving section can react (using a reflection type). These correspond to the rotary plate and the light beam blocking plate as the detection means of the cutoff state of the present invention, and the proximity switch and the photoelectric switch as the signal transmission means 25 for detecting the cutoff state of the blocking rod 14 and transmitting a signal. .

In the above-mentioned specific example, the locking means 16 attached to the tip of the blocking rod 14 has the locking piece 16b and the locking hole with respect to the receiving tool 13.
I explained that it can be locked only by fitting with 32,
A locking metal fitting (not shown) such as a latch for locking the end of the blocking rod 14 adjacent to the locking piece 16b is provided on the receiving tool 13 side, if necessary, and the blocking metal 14 It is possible to secure the safety by providing a locking mechanism so that the lock bar is locked when it is held by the receiving tool 13 and that the lock bar 14 is not opened unless the lock is released so that the lock bar 14 cannot be easily removed. it can.

The blocking rod 14 of the above embodiment corresponds to the blocking member of the present invention, and the movable receiving hook piece corresponds to the movable receiving metal. The blocking member is not limited to the blocking rod, and may be a foldable structure having a vertical width, for example.

[0028]

As described above, according to the present invention, the passenger seat portion and the cargo loading portion of the carrier platform can be combined with the simple structure, conforming to the structural standard, and without intentional operation from the outside. It can be said that this is a useful device that can block the boundary and ensure safety.

[Brief description of drawings]

FIG. 1 is an overall front view of a construction elevator provided with a blocking device of the present invention.

FIG. 2 is a plan view of a passenger seat portion provided with the blocking device of the present invention in FIG.

FIG. 3 is a front view showing an enlarged main part of a specific example of a blocking device of the present invention, in which a part is omitted.

4 is a front view showing a mounting portion of the blocking device in FIG. 1. FIG.

5 is a VV view of FIG. 3. FIG.

FIG. 6 is a VI-VI view of FIG. 3.

[Explanation of symbols]

1 Construction Elevator 3 Cargo Carrier 4 Lifting Frame 6 Handrail 7 Canopy 10 Blocking Device 11 One Column 12 The Other Column 13 Receiving Tool 14 Blocking Bar 14 'Boss 14A Operation Part 14a Cam Surface 15 Axis 16 Locking Means 16a Collar 16b Locking piece 17 Spring 18 Operation handle 20 Blocking bar support 21 Mounting box 25 Signal transmitting means 26 Limit switch 31 Fixed receiving plate 32 Locking hole 40 Carrying platform operation control section A Passenger seat B Cargo loading section ==== ===============================================
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─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-304272 (JP, A) Actually open 60-1007075 (JP, U) Actually open 4-73179 (JP, U) Actually open 7- 35464 (JP, U) Actual Open 59-149875 (JP, U) Actual Open 57-174470 (JP, U) Actual Open 53-160226 (JP, U) Actual Open 3-9375 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B66B 1/00-11/08 E04G 1/00-7/30

Claims (5)

(57) [Claims] [Claim 1] its in the carriage bed of a construction for an elevator
It is installed at the boundary position between the passenger seat part at the end of the cargo bed and the other cargo loading parts, and the passenger seat part during the lifting operation of the carrier.
The passenger seat and the cargo that are designed to block the cargo loading section from
A shutoff device for the mounting part, in which a pair of columns are erected on the loading platform at the boundary position at required intervals.
A blocking member pivotally supported at its base and rotatable in the vertical direction is attached to one of the columns, and the other column is provided with the above-mentioned blocking member.
Attached to the pillar to receive and lock the tip of the blocking member
Comprising a receptacle that is, its the vicinity pivot portion of the blocking member
By arranging the signal transmitter for blocking member detects the position where the blocking position, boarding a cargo mounting portion of the carriage, which is a connection structure for a drive control unit of the carriage and the signal transmitter Blocking device for the seat section. 2. The shut-off member is a rod having a required length, and a shut-off member is provided at a base end portion around a pivot, and the shut-off member is formed on a circumferential surface having different radial dimensions between a shut-off posture position and a shut-off open position. A locking means that is provided and has a forward / backward movement is attached to the tip end of the blocking member, and a support body that supports the pivot of the base is attached to a column that is erected on one side edge on the bed floor. A receiving member capable of engaging with and holding the locking means of the blocking member is attached to the upright supporting column at a position opposite to the column vertically crossing the boundary position of the carrier, and the blocking member is manually moved to the blocking position. 2. The cargo loading section of the carrier according to claim 1, wherein the signal transmission means is incorporated in the support so that the signal transmission means can be operated up and down in an open position. A device that shuts off the passenger seat. 3. The blocking member, its pivot, the support, and a signal transmitting means for transmitting a blocking posture detected by an operating portion of the blocking member to an operation control unit of the carrier are unitary, and the blocking member is The unit structure and the receiver capable of blocking and holding by engaging the locking means of the blocking member have a configuration that can be attached to a pair of upright columns at the boundary position between the passenger seat section and the cargo loading section of the carrier of the carrier. A device for shutting off a cargo mounting portion and a passenger seat portion of a carrier according to claim 1 or 2. Wherein said operation unit that is included with the blocking member and the signal transmitter for emitting a blocking signal by detecting the blocking position of the blocking member, according to claim 1 to be closed is a configuration that can not be operated from the outside 3. A device for shutting off a cargo loading section and a passenger seat section of the carrier according to any one of 3). 5. The locking means provided at the tip of the blocking member includes a locking piece that is not detachable and is axially movable back and forth in the tip of the hollow rod, an urging elastic body, and 2. An operating grip which is fitted to the rod and whose locking pin is connected so as to be able to be moved forward and backward from the outside.
4. A device for shutting off a cargo loading section and a passenger seat section of the carrier according to any one of 3 to 3.