JP2531541Y2 - Braking device for linear motor type transfer equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] In the present invention, a braking body that acts on a vehicle body that travels along a guide rail by a primary linear motor on the ground is elastically biased toward a braking action side. The present invention relates to a braking device for a linear motor-type transfer facility, which is provided and has an electric operation device for returning the brake body to a braking release side.

[Conventional technology]

Generally, in the above-described linear motor type transfer equipment,
In order to reduce equipment costs, a method is adopted in which primary coils are installed at regular intervals, and the vehicle is driven by inertia during that time.

However, if a power failure occurs while the vehicle is traveling, the excitation of the primary coil is interrupted, and the vehicle stops at an undetermined position after the inertial traveling. If the primary coil is stopped at a place where the primary coil is not installed, the vehicle is not driven even if the primary coil is energized by re-energizing, and the body is manually moved to the place where the primary coil is installed. Is required.

Conventionally, in order to solve the above-mentioned problem, a braking device that acts on the braking side at the time of a power failure is provided at a place where the primary coil is installed on the track, so that a vehicle body that has inertialy traveled at the time of a power failure is powered down on the primary coil. One of the braking devices described in Japanese Patent Application Laid-Open No. 59-72904 will be briefly described with reference to FIGS. 5 (a) and 5 (b).

During normal energization, the solenoid (10) as an electric operating device is excited, and the pair of rods (11) compresses a coil spring (12) that urges it to extend,
Retracted inside the solenoid (10). Therefore, the connecting bar (13) has an upper end that is spread around the pin (14) as a fulcrum. It is supported so as to keep a constant distance from the side surface of 4).

When a power failure occurs, the excitation of the solenoid is cut off,
The rod (11) moves outward by the urging force of the coil spring (12). Therefore, the connecting bar (13) narrows at the top,
Accordingly, the braking body (15) can sandwich the vehicle body (4). As a result, the vehicle body (4) that has run inertia during a power failure stops on the primary coil (1).

[Problems to be solved by the invention]

In the case of the above-described braking device, the braking body is pressed against the vehicle body,
The vehicle body is stopped by the frictional force, and the pressing force is proportional to the urging force of the coil spring and its deformation (compression) rate. In order to surely stop the vehicle body with less impact, it is necessary to appropriately maintain the pressing force of the brake on the vehicle body.

However, in the case of the above-described braking device, since the pressing force of the brake body against the vehicle body changes greatly due to the displacement of the brake body in the vehicle width direction, for example, the position of the contact surface for the braked operation of the vehicle body is reduced. If the vehicle body varies in the lateral width direction, the pressing force of the brake body deviates from an appropriate value, and there is a possibility that the vehicle body cannot be reliably stopped with less impact.

Although this braking device operates during a power outage, that is, during an emergency, it is still preferable that the impact applied to the vehicle body be small. This is especially true for goods that are sensitive to vibration.

The present invention has been made in view of the above-described problems, and regardless of a change in the amount of backward displacement of the brake body, the brake body exerts a braking action on the vehicle body with a substantially constant pressing force. It is an object of the present invention to provide a braking device for a linear motor-type transfer equipment capable of stopping the motor with less impact.

[Means for solving the problem]

The braking device of the linear motor type transport equipment of the present invention is provided with a braking body that performs a braking operation on a vehicle body that travels along a guide rail by a primary linear motor on the ground, and is provided by being elastically biased to a braking operation side. An electric operating device for returning the brake body to the brake release side; a swing arm for supporting the brake body to be freely changeable between a braking operation position and a brake release position; A pivotally pivotable portion, a brake release operation position for pushing an intermediate position in the longitudinal direction of the rocking arm toward the brake release side at one end portion for pushing the arm, and a braking action of the rocking arm. An operating arm that is switched to a braking operation position that allows swinging to the side, and the swing arm that urges the swing arm toward the braking operation side and urges the operation arm toward the braking operation position. Motion A tension spring interposed between a longitudinally intermediate portion of the operation arm and a spring connection other end portion located on a side opposite to the one end side portion for pushing the arm with respect to a pivot point of the operation arm. A stopper that regulates a swing range of the operation arm toward the braking operation position, and the electric operation device is provided to return the operation arm to the brake release operation position. It is characterized by the following.

[Action]

During normal energization, the electric operating device holds the operation arm in the brake release operation position, and the swing arm supports the brake body in the brake release position.

When a power failure occurs, the operation arm is brought into a braking operation position in which the operation arm comes into contact with the stopper by the urging force of the tension spring, and the swing arm supports the brake body in the braking operation position.

By the way, the relative positional relationship between the swing arm and the operation arm is such that the operation arm, whose middle portion in the longitudinal direction is pivotally supported pivotally, is positioned at one end portion for pushing the arm in the middle of the swing arm in the longitudinal direction. And the tension spring that urges the swing arm toward the braking operation side and urges the operation arm toward the braking operation position is located in the longitudinal direction of the swing arm. Since it is arranged so as to be interposed between the halfway point and the other end portion for spring connection located on the opposite side to the one end portion for pushing the arm with respect to the pivot point of the operation arm, The pressing force applied to the vehicle body by the braking body is given by the component force in the direction toward the vehicle body, which is obtained by separating the urging force of the tension spring into a vector. A biasing force in the contraction direction is given to the tension spring in advance, and when the braking body retreats according to the contact position for the braked operation of the vehicle body during the braking operation,
Even if the amount of retraction changes, the change in the component force is sufficiently small.

[Effect of the invention]

Therefore, even if the contact position for the braking action of the vehicle body varies in the moving direction of the brake body, the brake body can be pressed against the vehicle body with a substantially constant pressing force without being largely influenced by the amount of backward displacement of the brake body. As a result, the vehicle body can be reliably stopped with less impact. Further, the tension spring interposed between the swing arm and the operation arm not only urges the swing arm to the braking operation side but also functions to urge the operation arm to the braking operation position side. Also, at the time of a power failure, there is also an effect that the transition from the brake release state of the braking device to the braking operation state can be performed more reliably.

Further, in the prior art, the electric operating device needs to return the brake body to the braking release side against the urging force considerably larger than the urging force at the time of the braking action. Since the change in the pressing force is small as described above, the electric operating device only needs to withstand the urging force that is not so different from the pressing force required during the braking operation, and a small electric operating device can be employed.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the figure, the same components as those in the conventional example of FIG. 5 are denoted by the same reference numerals.

1 to 3, (1) is a primary coil fixed to a guide rail (3), (2) is a secondary conductor fixed to a vehicle body (4), and both constitute a linear motor. Thus, a linear motor-type transfer facility for moving the vehicle body (4) along the guide rail (3) is configured.
The primary coils (1) are installed at appropriate intervals.

A braking device for stopping the vehicle body (4) above the primary coil (1) in the event of a power failure is provided, which will be described in detail below.

Reference numeral (5) denotes a pair of left and right braking bodies, which contact the braking member (4a) provided on the lateral side surface of the vehicle body (4) to brake the vehicle body (4). The brake body (5) is supported by a pair of front and rear swing arms (7). Each swing arm (7) has its lower part pivotally supported by a horizontal shaft (21) and its upper part swings. The position of the braking body (5) is changed between a braking operation position and a braking release position. The operation arm (8) has a longitudinally intermediate portion pivotally supported by a horizontal axis (22) parallel to the horizontal axis (21), and an upper portion which is one end side for pushing the arm has a swing arm (7). And a lower portion which is the other end portion for spring connection and located on the opposite side of the one end side portion for pushing the arm with respect to the pivot point of the operation arm (8). It is pivotally supported on a horizontal shaft (23) to a rod (11) that is operated by the solenoid (6). The tension spring (9)
The swing arm (7) is interposed in the longitudinal direction, more specifically, between the upper part and the lower part of the operation arm (8) to urge the swing arm (7) to the braking operation side and to operate the swing arm (7). The arm (8) is biased toward the braking operation side. The stopper (20) regulates a swing range of the operation arm (8) toward the braking operation position.

 Next, the operation of the braking device will be described.

During normal energization, as shown in FIG.
Is in the operating state, and the rod (11) is retracted into the solenoid (6). Therefore, the operation arm (8) is in a braking release operation position in which the lower part moves inward and the upper part moves outward with the horizontal axis (22) as a pivot point. The upper part of the operating arm (8) contacts the middle part in the longitudinal direction of the swing arm (7), more specifically, the middle part, and pushes the swing arm to the braking release side to operate the brake supported on the swing arm upper part. Body (5)
Has retracted to the braking release position. In this state, a certain distance or more is secured between the brake body (5) and the contact surface of the member to be braked (4a) on the side of the vehicle body passing therethrough. These series of operation directions are directions against the urging force of the tension spring (9), and the state is maintained by the electromagnetic force of the solenoid (6).

On the other hand, when a power failure occurs, the operating state of the solenoid (6) is released, and the operating arm (8) is moved to the braking operation position by the urging force of the tension spring (9) as shown in FIG. ) Moves to the braking operation side. Therefore, the braking body (5) is protruded to the braking operation position, and the vehicle body (4) which is going to pass through the space between the left and right braking bodies (5).
, That is, slightly smaller than the width of the left and right braked members (4a). In this state, when the vehicle body (4) that has traveled by inertia tries to pass through, the braking action works due to the friction between the member to be braked (4a) on the side surface of the vehicle body and the braking body (5), and the vehicle body (4) stops. .

At this time, the force acting on the swing arm (7) and the operation arm (8) by the urging force of the tension spring (9) becomes as shown in FIG. First, the urging force Fa of the tension spring (9) acting on the swing arm (7) is vector-decomposed into a component force Fas toward the pivot point (21) of the swing arm and a horizontal component force Fah. Similarly, the urging force Fb of the tension spring (9) acting on the operation arm (8) is vector-decomposed into a component force Fbs toward the pivot point (22) of the operation arm and a horizontal component force Fbh. Here, Fa and Fb are forces having the same magnitude but opposite directions.

The horizontal component force Fah acting on the swing arm (7) is the pressing force of the braking body (5) against the vehicle body (4), and depends on the position of the contact surface of the member to be braked (4a) during braking. When the brake body (5) moves backward, the change in the component force Fah due to the backward displacement can be made sufficiently small.

According to this structure, as can be seen from FIG.
The pivot arm (4), the pivot point of the operating arm (8), and the position where the tension spring (9) is attached to both arms (7), (8) are appropriately determined, so that the pivot arm (7) It is also possible to reduce the horizontal component force Fbh acting on the operation arm (8) with respect to the horizontal component force acting, that is, the pressing force Fah of the brake body (5). This makes it possible to reduce the size of the solenoid (6) and reduce the exciting power.

(Another embodiment)

In practicing the present invention, the specific configuration of each part can be variously changed, such as bringing the brake body (5) into contact with the bottom of the vehicle body (4).

Note that, in the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention does not limit the structure of the attached drawings.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the braking device of the present invention, and FIG.
FIG. 3 and FIG. 3 are side views, and FIG. 4 is an explanatory view of the force acting on the brake device. FIG. 5 is a structural diagram of a conventional braking device. (1), (2) ... linear motor, (3) ... guide rail, (4) ... body, (5) ... brake body, (6) ... electric operating device, (7) ... Swing arm (8) Operation arm (9) Tension spring (20) Stopper

Claims (1)

(57) [Scope of request for utility model registration] A vehicle body (4) driven along a guide rail (3) by a primary linear motor (1), (2) on the ground.
A brake body (5) that acts on the brake is elastically biased toward the braking action side and is provided with an electric operating device (6) that returns the brake body (5) to the brake release side. A braking device for a motor-type transfer facility, comprising: a swing arm (7) for supporting the brake body (5) in a braking operation position and a brake release position so as to be freely changeable; A brake release operation position which is pivotally supported and pushes a halfway portion of the swing arm (7) in the longitudinal direction toward the brake release side at one end for pushing the arm, and a braking action of the swing arm (7); Operating arm (8) which can be switched to a braking position allowing swinging to the side
A middle portion in the longitudinal direction of the swing arm (7) so as to bias the swing arm (7) toward the braking action side and bias the operation arm (8) toward the braking action operation position side; A tension spring (9) interposed between a pivot point of the operation arm (8) and the other end for spring connection located on the opposite side to the one end for pushing the arm; A stopper (20) for regulating a swing range of the operation arm (8) toward the braking operation position is provided, and the electric operating device (6) releases the brake on the operation arm (8). A braking device for a linear motor-type transfer facility provided to return to an operation position.