JPH01242398A - Trolley with tiltable support table - Google Patents

Abstract

PURPOSE:To vary the inclination of a support table continuously by furnishing a resilient member arranged between a trunk and the support table, and providing a elastically shrinking member, whose one end is secured to the support table and other end is fitted with a detent member to be detained with a truck frame. CONSTITUTION:In normal condition, a support table 6 whereon a work 2 is placed, is held in the standard position substantially in parallel with a truck 4 by resilient members 12, 12. When the support table 6 is to be inclined, pressure fluid is supplied to an elastically shrinking member 20 arranged on the sidewhich provides approach to the truck 4 with inclination of the support table 6. Now the shrinking member 20 deforms in increasing the dia. and shrinks in the axial direction, and a detent member 16 is detained with a truck frame. Therefore, the support table 6 borne rotatably by the truck 4 rotates round the rotary shaft against the resilience of the resilient member 12. Because the shrinking motion of the shrinking member 20 is continuous, the rotation of the support table 6, i.e. its inclination, is changeable continuously.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention provides an incline compressor using a so-called air bag type elastic contracting body that expands and deforms in diameter by supplying pressurized fluid and generates a contractile force in the axial direction. This invention relates to a trolley with a flexible support base.

(Prior art and its problems) Conventionally, such devices have been used to transport workpieces etc. to a predetermined work site and further to the next work site. For example, as shown in Fig. 4(a), When used in the painting process of workpieces, etc., place the workpiece 2 on the trolley 4,
If necessary, the support stand 6 rotatably supported by the trolley is rotated a desired amount around its rotation axis 8 and fixed, thereby exposing the parts that are difficult to see from the worker located in front of the workpiece. , used to coat the workpiece evenly.

Specifically, one end is rotatably attached to a trolley and serves as an elastic means, facing an engaging member IO which is fixed to the lower part of a rotatably supported support base 6 and has engaging teeth formed on its outer periphery. A lever 14 pressed by a compression spring 12 is provided,
By engaging the locking member 16 provided on the lever 14 with the engaging teeth of the engaging member 10, the support base 6 is held at a desired tilted position.

However, when tilting the support base 6 of such a cart, the support base 6 must be moved against the weight of the workpiece 2, and a considerable force is therefore required. This made operation cumbersome.

In addition, due to its structure, the operating range of the lever 14 is limited.

For this reason, as shown in FIG. 6(b), instead of the engaging member 10 and the locking member 16, a cylinder 18 whose stroke can be changed in two or three stages is installed between the support base 6 and the trolley 4. There is also a structure in which the inclination angle of the support base can be adjusted by providing a support base and changing its stroke.

However, with this device, although it is possible to mechanically tilt the support base according to the movement of the cylinder, the angle that can be tilted is determined according to the stroke, so the tilt position is limited. Another problem is that the weight of the cylinder is large, which increases the weight of the entire device.

In addition, when a hydraulic cylinder is used as the cylinder,
There is also the problem of contaminating the surrounding environment due to leakage of hydraulic oil.

Similarly, some devices have an electric motor as a driving means to tilt the support platform, but the speed is reduced! Since the device requires a JI setting, the weight of the device increases, and there is a risk of generating sparks, so there is a problem that its use is prohibited in a flammable atmosphere.

The present invention was made with the aim of solving these problems,
The object of the present invention is to provide a cart with a tiltable support stand having a simple structure and capable of continuously changing the inclination of the support stand without increasing the weight of the device.

(Means for Achieving the Object) In order to achieve this object, the apparatus of the present invention includes a truck that can run on a track or a flat surface, and a support table that is tiltably supported by the truck and supports a workpiece. and an elastic member disposed between the cart and the support base to hold the support base at a reference position.
One end is fixed to the support base, and the other end extends through the trolley frame, and is expanded in diameter and contracted in the axial direction by the supply of pressurized fluid arranged in each inclined direction of the support base. A set of elastic contraction bodies with at least two pieces.

The elastic contraction member includes at least a locking member fixed to the other end of each elastic contraction body and engaged with the truck frame when the elastic contraction body is contracted.

(Function) In the normal state, the support base on which the work is placed is 1,
It is held at a reference position substantially parallel to the cart by an elastic member disposed between the support stand and the cart, but when the support stand is to be tilted, the support stand is tilted and the cart approaches the cart. Pressurized fluid is supplied to the elastic contractile body disposed on the opposite side. Then, the elastic contractile body expands in diameter and contracts in its axial direction, but a locking member is attached to one end of the elastic contractile body, and as the contractile body contracts, it locks onto the trolley frame. will be engaged.

Therefore, the support base, which is rotatably supported with respect to the cart, rotates around its rotation axis against the elastic force of the elastic member. Note that since the contraction movement of the elastic contraction body is continuous, the rotation of the support base, that is, the inclination thereof can be changed continuously. Moreover, since the elastic contractile body does not have the risk of generating sparks, it can be used even in an explosive atmosphere.

(Example) The apparatus of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram schematically showing an embodiment of the apparatus of the present invention, in which reference numeral 2 indicates a workpiece, 4 a cart, 4a a cart frame, and 6 a support stand. Components having the same functions as those shown in FIG. 4 due to the darkness are indicated by the same reference numerals.

The trolley 4 is equipped with wheels 4b so as to be able to run on a track such as a rail or on the floor, and a pair of support protrusions 4c are provided on the upper part thereof facing the support base 6. ing. Support protrusions 4 provided between the eyebrows of each other
c supports both ends of the rotation shaft 8.

On the other hand, the rotation shaft 8 rotatably supports a flange 6a provided at a distance from the lower part of the support base 6. Therefore, the support base 6 can rotate around the rotation axis 8 relative to the carriage 4.

At least one pair of compression springs 12 as elastic members are arranged between the support base 6 and the trolley 4, substantially symmetrically with respect to the rotation axis 8 and spaced apart from each other. These compression springs 12 are
The support table 6 on which the workpiece is placed is held at an approximately horizontal reference position unless external force is applied, and the installation location, installation interval, etc. can be changed as appropriate according to the specifications of each cart. It is.

Further, between the support base 6 and the trolley 4, at least two pairs of elastic contracting bodies 20 are arranged parallel to the elastic member 12 and spaced apart from each other with respect to the rotation axis 8.

These elastic contracting bodies 20 are of the so-called air bag type, which expands and deforms in diameter when pressurized fluid is supplied to their internal space, and generates a contractile force in the axial direction.As shown in FIG. Alternatively, a braided reinforcing structure 24 made of twisted or untwisted filaments such as aromatic polyamide fibers or ultrafine metal wires is arranged around the outer periphery of the tubular body 22 made of a rubber-like elastic material. , the openings at both ends are closed with closing members 26, and the outside thereof is caulked with a caulking cap 28. The pressurized fluid is supplied to and discharged from the internal cavity through a connection port formed in at least one of the closing members 26.

In this embodiment, one end of these elastic contracting bodies is fixed to the support base 6, while the other end extends through the frame 4a of the truck 4, and a locking member 16 is fixed to the protruding end. This locking member 16 engages with the truck frame 4a and substantially fixes the other end of the elastic contractile body to the truck frame 4a when the elastic contractile body is retracted in the axial direction by application of pressurized fluid. It is something. As the locking member, it is preferable to use a relatively heavy locking member so that the elastic contractile body can be held substantially in a straight line when no pressurized fluid is allowed to pass therethrough. The elastic contracting body is always held in a straight line without the action of pressurized fluid to prevent the elastic contracting body from being damaged by tQ.

In addition, the code|symbol 30 has shown the piping which supplies and discharges pressurized fluid to each elastic contraction body, and the other end of piping is connected to the pressurized fluid supply port 32 provided in the trolley|bogie frame 4a.

Next, the operation will be explained with reference to the situation when painting work is performed using the trolley with support base of the present invention.

The workpiece 2 that has been subjected to a predetermined process is placed on the support stand 6. Since the support stand 6 is supported at the reference position by each elastic member 12 arranged symmetrically with respect to the rotation axis 8, the workpiece 2 is placed on the support stand 6. As shown in FIG. 1, the workpiece 2 is also held in a substantially horizontal state. In this state, no pressurized fluid is applied to the elastic contractile body 20.

When the trolley moves into the painting booth along the laid rails, the pressurized fluid supply pipe 36 connected to the operating pressure source 34 such as an air compressor is connected to the pressurized fluid supply port 3.
Connected to 2. This pressurized fluid supply pipe 36 is provided with a meteor control valve 38, and the valve opening degree can be changed based on a control signal from an operator. This situation is shown in FIG. 3(a).

In addition, in the same figure, the state in which pressurized fluid of the same pressure is applied to each elastic contraction body 20 arranged symmetrically with respect to the rotation axis 8, and the support base 6 is held in the standard horizontal state is shown. It shows.

In this state, when the painting of the workpiece in front of the worker is completed, the operator operates the operation lever 40 that adjusts the valve opening degree of the flow rate control valve 38 to apply the operation pressure rX32 to each elastic contracting body. By appropriately adjusting the flow rate of the supplied pressurized fluid, the elastic contracting body located on the worker side is contracted,
Pressurized fluid is discharged from an elastic contractile body located at a distance from the operator. Then, as shown in FIG. 6(b), the locking member 16 attached to one end of the elastic contracting body engages with the truck frame, so that the support 6 rotates around the rotation axis 8 in the figure. It rotates in the direction shown by arrow A. The amount of rotation corresponds to the amount of movement of the movement lever 40 and the flow rate of the pressurized fluid applied to the elastic contractile body, and can be adjusted according to the progress of the painting work. This means that unpainted parts can be easily painted. In addition,
Since the pressurized fluid is discharged from the elastic contracting body located apart from the operator, the elastic contracting body does not inhibit the rotational movement of the support base 6.

Furthermore, by applying the pressurized fluid to each elastic contractile body in the opposite direction, the support base 6 can be rotated in the direction shown in FIG. 3(c). .

When the painting work is completed, the pressurized fluid supply port 32
When the piping 36 is removed and the pressurized fluid is discharged from each elastic contraction body, the support base 6 returns to the horizontal state due to the elastic force of the compression spring 12 as an elastic member.

In this embodiment, an air compressor is used as the operating pressure source, but a configuration may also be adopted in which pressurized fluid is supplied to the elastic contractile body using, for example, an appropriate pressure accumulating means.
Alternatively, a detection means for detecting the rotation of the support base, such as a rotary encoder, may be attached to the rotation wheel, and the valve opening of the flow control valve may be adjusted according to a predetermined procedure based on the detection signal from the rotary encoder. , various modifications are possible within the scope of the claims.

(Effects of the Invention) As described in detail above, according to the truck with a support base of the present invention, the support base can be tilted without using a relatively heavy driving means such as a hydraulic cylinder, and the support base can be tilted as desired. The slope can be changed continuously up to the position. Moreover, since the tilting operation can be performed simply by controlling the supply of pressurized fluid, it is extremely easy to adjust the degree of tilting.
The structure can also be made simple, contributing to the development of industry.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing a cart with a support base according to the present invention. FIG. 2 is a partially broken diagram showing an elastic contractile body suitable for use in the cart according to the present invention. FIG. FIG. 4 is an explanatory diagram showing how the truck is used, and FIG. 4 is a schematic diagram showing a conventional truck. 2 Workpiece 4 Dolly 4, ]-Dolly frame 4b Wheel 4 (support protrusion 6 Support stand 6a. Flange 8-Rotation shaft lO engaging member 12 Elastic member I4 Lever 16-Locking member 18 Flange 20-Elastic contraction body 30-Piping 32
Pressurization? lil base port 34 Operation pressure source 36 - pressurized fluid supply piping Patent applicant Brideston Co., Ltd. a Fig. 1 Fig. 3, C7

Claims (1)

[Claims] 1. A cart capable of traveling on a track or a flat surface, a support stand tiltably supported by the cart and supporting a workpiece, and an elastic member disposed between the cart and the support stand to hold the support stand at a reference position. , one end is fixed to the support base and the other end extends through the trolley frame, and is expanded in diameter and deformed in the axial direction by the supply of pressurized fluid that is spaced apart from each other and arranged in the respective inclination directions of the support base. It is characterized by comprising at least a set of at least two elastic contracting bodies that contract, and a locking member that is fixed to the other end of each elastic contracting body and engages with the truck frame when the elastic contracting bodies are contracted. Trolley with tiltable support platform